fr.aliacom.obm.common.calendar.CalendarDaoJdbcImpl.java Source code

Java tutorial

Introduction

Here is the source code for fr.aliacom.obm.common.calendar.CalendarDaoJdbcImpl.java

Source

/* ***** BEGIN LICENSE BLOCK *****
 * 
 * Copyright (C) 2011-2014  Linagora
 *
 * This program is free software: you can redistribute it and/or 
 * modify it under the terms of the GNU Affero General Public License as 
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version, provided you comply 
 * with the Additional Terms applicable for OBM connector by Linagora 
 * pursuant to Section 7 of the GNU Affero General Public License, 
 * subsections (b), (c), and (e), pursuant to which you must notably (i) retain 
 * the Message sent thanks to OBM, Free Communication by Linagora? 
 * signature notice appended to any and all outbound messages 
 * (notably e-mail and meeting requests), (ii) retain all hypertext links between 
 * OBM and obm.org, as well as between Linagora and linagora.com, and (iii) refrain 
 * from infringing Linagora intellectual property rights over its trademarks 
 * and commercial brands. Other Additional Terms apply, 
 * see <http://www.linagora.com/licenses/> for more details. 
 *
 * This program is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License 
 * for more details. 
 *
 * You should have received a copy of the GNU Affero General Public License 
 * and its applicable Additional Terms for OBM along with this program. If not, 
 * see <http://www.gnu.org/licenses/> for the GNU Affero General Public License version 3 
 * and <http://www.linagora.com/licenses/> for the Additional Terms applicable to 
 * OBM connectors. 
 * 
 * ***** END LICENSE BLOCK ***** */
package fr.aliacom.obm.common.calendar;

import static org.apache.commons.lang.StringUtils.startsWithIgnoreCase;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.sql.Types;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TimeZone;

import net.fortuna.ical4j.model.DateTime;

import org.obm.annotations.database.AutoTruncate;
import org.obm.annotations.database.DatabaseEntity;
import org.obm.domain.dao.UserDao;
import org.obm.icalendar.Ical4jRecurrenceHelper;
import org.obm.push.utils.DateUtils;
import org.obm.push.utils.JDBCUtils;
import org.obm.push.utils.jdbc.AbstractSQLCollectionHelper;
import org.obm.push.utils.jdbc.IntegerIndexedSQLCollectionHelper;
import org.obm.push.utils.jdbc.IntegerSQLCollectionHelper;
import org.obm.push.utils.jdbc.StringSQLCollectionHelper;
import org.obm.push.utils.jdbc.WildcardStringSQLCollectionHelper;
import org.obm.sync.auth.AccessToken;
import org.obm.sync.auth.EventNotFoundException;
import org.obm.sync.auth.ServerFault;
import org.obm.sync.calendar.Attendee;
import org.obm.sync.calendar.CalendarInfo;
import org.obm.sync.calendar.DeletedEvent;
import org.obm.sync.calendar.Event;
import org.obm.sync.calendar.EventExtId;
import org.obm.sync.calendar.EventObmId;
import org.obm.sync.calendar.EventOpacity;
import org.obm.sync.calendar.EventPrivacy;
import org.obm.sync.calendar.EventRecurrence;
import org.obm.sync.calendar.EventType;
import org.obm.sync.calendar.FreeBusy;
import org.obm.sync.calendar.FreeBusyInterval;
import org.obm.sync.calendar.FreeBusyRequest;
import org.obm.sync.calendar.Participation;
import org.obm.sync.calendar.Participation.State;
import org.obm.sync.calendar.ParticipationRole;
import org.obm.sync.calendar.RecurrenceDaysParser;
import org.obm.sync.calendar.RecurrenceDaysSerializer;
import org.obm.sync.calendar.RecurrenceId;
import org.obm.sync.calendar.RecurrenceKind;
import org.obm.sync.calendar.ResourceAttendee;
import org.obm.sync.calendar.ResourceInfo;
import org.obm.sync.calendar.SyncRange;
import org.obm.sync.dao.EntityId;
import org.obm.sync.items.EventChanges;
import org.obm.sync.solr.SolrHelper;
import org.obm.sync.solr.SolrHelper.Factory;
import org.obm.sync.utils.DisplayNameUtils;
import org.obm.utils.LinkedEntity;
import org.obm.utils.ObmHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Objects;
import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Multimap;
import com.google.common.collect.Sets;
import com.google.inject.Inject;
import com.google.inject.Singleton;

import fr.aliacom.obm.common.FindException;
import fr.aliacom.obm.common.SQLUtils;
import fr.aliacom.obm.common.calendar.loader.AttendeeLoader;
import fr.aliacom.obm.common.calendar.loader.EventLoader;
import fr.aliacom.obm.common.calendar.loader.ResourceLoader;
import fr.aliacom.obm.common.domain.ObmDomain;
import fr.aliacom.obm.common.user.ObmUser;
import fr.aliacom.obm.utils.LogUtils;
import fr.aliacom.obm.utils.RFC2445;

/**
 * Calendar data access functions
 */
@Singleton
@AutoTruncate
public class CalendarDaoJdbcImpl implements CalendarDao {

    private static final int USERS_PATTERN_MATCHING_FIELDS_COUNT = 3;
    private static final int RESOURCES_PATTERN_MATCHING_FIELDS_COUNT = 2;

    private static final Logger logger = LoggerFactory.getLogger(CalendarDaoJdbcImpl.class);

    // event_ext_id | character varying(255) | default ''::character varying
    // event_owner | integer |
    // event_timezone | character varying(255) | default 'GMT'::character
    // varying
    // event_opacity | event_opacity | default 'OPAQUE'::event_opacity
    // event_title | character varying(255) | default NULL::character varying
    // event_location | character varying(100) | default NULL::character varying
    // event_category1_id | integer |
    // event_priority | integer |
    // event_privacy | integer |
    // event_date | timestamp without time zone | not null
    // event_duration | integer | not null default 0
    // event_allday | boolean | default false
    // event_repeatkind | character varying(20) | default NULL::character
    // varying
    // event_repeatfrequence | integer |
    // event_repeatdays | character varying(7) | default NULL::character varying
    // event_endrepeat | timestamp without time zone |
    // event_color | character varying(7) |
    // event_completed | timestamp without time zone | not null
    // event_url | text |
    // event_description | text |
    // event_properties | text |

    private static final String EVENT_SELECT_FIELDS = "event_id, " + "event_timeupdate, " + "event_timecreate, "
            + "event_type, " + "event_ext_id, " + "event_timezone, " + "event_opacity, " + "event_title, "
            + "event_location, " + "eventcategory1_label, " + "event_priority, " + "event_privacy, "
            + "event_date, " + "event_duration, " + "event_allday, " + "event_repeatkind, "
            + "event_repeatfrequence, " + "event_repeatdays, " + "event_endrepeat, " + "event_color, "
            + "event_completed, " + "event_url, "
            + "event_description, now() as last_sync, event_domain_id, evententity_entity_id, " + "event_sequence, "
            + "o.userobm_login as owner, domain_name, o.userobm_firstname as ownerFirstName, "
            + "o.userobm_lastname as ownerLastName,  o.userobm_commonname as ownerCommonName, " + "o.userobm_email,"
            + "c.userobm_firstname as creatorFirstName, " + "c.userobm_lastname as creatorLastName,"
            + "c.userobm_commonname as creatorCommonName, " + "c.userobm_email as creatorEmail";

    private static final String EVENT_INSERT_FIELDS = "event_owner, " + "event_ext_id, " + "event_timezone, "
            + "event_opacity, " + "event_title, " + "event_location, " + "event_category1_id, " + "event_priority, "
            + "event_privacy, " + "event_date, " + "event_duration, " + "event_allday, " + "event_repeatkind, "
            + "event_repeatfrequence, " + "event_repeatdays, " + "event_endrepeat, " + "event_color, "
            + "event_completed, " + "event_url, "
            + "event_description, event_domain_id, event_usercreate, event_origin, event_type, event_timecreate,"
            + "event_sequence";

    private static final String ATT_INSERT_FIELDS = "eventlink_event_id, eventlink_entity_id, "
            + "eventlink_state, eventlink_required, eventlink_percent, eventlink_usercreate, eventlink_is_organizer";

    private static final String EXCEPS_FIELDS = "event_id, eventexception_date";

    private final UserDao userDao;
    private final ObmHelper obmHelper;

    private final Ical4jRecurrenceHelper ical4jHelper;

    private final Factory solrHelperFactory;

    @Inject
    @VisibleForTesting
    CalendarDaoJdbcImpl(UserDao userDao, SolrHelper.Factory solrHelperFactory, ObmHelper obmHelper,
            Ical4jRecurrenceHelper ical4jHelper) {
        this.userDao = userDao;
        this.solrHelperFactory = solrHelperFactory;
        this.obmHelper = obmHelper;
        this.ical4jHelper = ical4jHelper;
    }

    private Integer catIdFromString(Connection con, String category, int domainId) throws SQLException {
        if (category == null) {
            return null;
        }

        Integer ret = null;
        PreparedStatement st = null;
        ResultSet rs = null;
        try {
            st = con.prepareStatement("select eventcategory1_id from EventCategory1 where eventcategory1_label=? "
                    + "and eventcategory1_domain_id=?");
            st.setString(1, category);
            st.setInt(2, domainId);
            rs = st.executeQuery();
            if (rs.next()) {
                ret = rs.getInt(1);
            }
        } finally {
            obmHelper.cleanup(null, st, rs);
        }
        return ret;
    }

    @Override
    public Event createEvent(AccessToken editor, String calendar, Event ev, Boolean useObmUser)
            throws FindException, SQLException, ServerFault {
        logger.info("create with token " + editor.getSessionId() + " from " + editor.getOrigin() + " for "
                + editor.getUserEmail());
        Connection con = null;
        try {
            con = obmHelper.getConnection();
            return createEvent(con, editor, calendar, ev, useObmUser);
        } finally {
            obmHelper.cleanup(con, null, null);
        }
    }

    @Override
    @AutoTruncate
    public Event createEvent(Connection con, AccessToken editor, String calendar, @DatabaseEntity Event ev,
            Boolean useObmUser) throws SQLException, FindException, ServerFault {
        Integer ownerId = null;
        logger.info("try to create with calendar owner:" + calendar);
        ownerId = userDao.userIdFromEmail(con, calendar, editor.getDomain().getId());
        if (ownerId == null) {
            throw new FindException("Error finding user[" + calendar + "]");
        }

        String evQ = "INSERT INTO Event (" + EVENT_INSERT_FIELDS + ") values ( " + ownerId + ",  " +
        // event_owner
                "?, " + // event_ext_id
                "?, " + // event_timezone
                "?, " + // event_opacity
                "?, " + // event_title
                "?, " + // event_location
                "?, " + // event_category1_id
                "?, " + // event_priority
                "?, " + // event_privacy
                "?, " + // event_date
                "?, " + // event_duration
                "?, " + // event_allday
                "?, " + // event_repeatking
                "?, " + // event_repeatfrequence
                "?, " + // event_repeatdays
                "?, " + // event_endrepeat
                "?, " + // event_color
                "?, " + // event_completed
                "?, " + // event_url
                "?," + // event_description
                "?," + // event_domain_id
                editor.getObmId() + // event_usercreate
                ",?," + // origin
                "?," + // type
                "now()," + // event_timecreate
                "?" + // event_sequence
                ")";

        PreparedStatement ps = con.prepareStatement(evQ);
        try {
            fillEventStatement(ps, ev, editor, 1);
            ps.executeUpdate();
        } finally {
            ps.close();
        }
        EventObmId id = new EventObmId(obmHelper.lastInsertId(con));
        ev.setUid(id);
        LinkedEntity linkEntity = obmHelper.linkEntity(con, "EventEntity", "event_id", id.getObmId());
        ev.setEntityId(linkEntity.getEntityId());

        insertAttendees(editor, ev, con, ev.getAttendees());

        insertExceptions(editor, ev, con, id);
        if (ev.isRecurrent()) {
            insertEventExceptions(editor, calendar, ev.getRecurrence().getEventExceptions(), con, id, useObmUser);
        }
        Integer alert = ev.getAlert();
        if (alert != null) {
            insertEventAlert(con, editor, ownerId, ev);
        }

        indexEvent(editor, ev);

        return ev;
    }

    private void indexEvent(AccessToken editor, Event ev) {
        try {
            solrHelperFactory.createClient(editor).createOrUpdate(ev);
        } catch (Throwable t) {
            logger.error("indexing error " + t.getMessage(), t);
        }
    }

    private List<Event> insertEventExceptions(AccessToken editor, String calendar, Set<Event> eventException,
            Connection con, EventObmId id, Boolean useObmUser) throws SQLException, FindException, ServerFault {
        List<Event> newEvExcepts = new LinkedList<Event>();
        Event created = null;
        Map<EventObmId, Date> eventsEx = new HashMap<EventObmId, Date>();

        for (Event evExcept : eventException) {
            created = createEvent(con, editor, calendar, evExcept, useObmUser);
            newEvExcepts.add(created);
            eventsEx.put(created.getObmId(), evExcept.getRecurrenceId());
        }

        PreparedStatement ps = null;
        try {
            ps = con.prepareStatement("insert into EventException "
                    + "(eventexception_parent_id, eventexception_child_id, eventexception_date, eventexception_usercreate) "
                    + "values (?, ?, ?, " + editor.getObmId() + ")");

            for (Entry<EventObmId, Date> entry : eventsEx.entrySet()) {
                ps.setInt(1, id.getObmId());
                ps.setInt(2, entry.getKey().getObmId());
                ps.setTimestamp(3, new Timestamp(entry.getValue().getTime()));
                ps.addBatch();
            }
            ps.executeBatch();
        } finally {
            obmHelper.cleanup(null, ps, null);
        }
        return newEvExcepts;
    }

    private void insertExceptions(AccessToken editor, Event ev, Connection con, EventObmId id) throws SQLException {
        PreparedStatement ps = null;
        try {
            ps = con.prepareStatement("insert into EventException "
                    + "(eventexception_parent_id, eventexception_date, eventexception_usercreate) "
                    + "values (?, ?, " + editor.getObmId() + ")");
            for (Date exd : ev.getRecurrence().getExceptions()) {
                ps.setInt(1, id.getObmId());
                ps.setTimestamp(2, new Timestamp(exd.getTime()));
                ps.addBatch();
            }
            ps.executeBatch();
        } finally {
            obmHelper.cleanup(null, ps, null);
        }
    }

    @VisibleForTesting
    Event eventFromCursor(Calendar cal, ResultSet evrs) throws SQLException {
        Event e = new Event();
        int id = evrs.getInt("event_id");
        e.setUid(new EventObmId(id));
        e.setEntityId(EntityId.valueOf(evrs.getInt("evententity_entity_id")));
        e.setTimeUpdate(JDBCUtils.getDate(evrs, "event_timeupdate"));
        e.setTimeCreate(JDBCUtils.getDate(evrs, "event_timecreate"));
        e.setTimezoneName(evrs.getString("event_timezone"));
        e.setType(EventType.valueOf(evrs.getString("event_type")));
        e.setExtId(new EventExtId(evrs.getString("event_ext_id")));
        e.setOpacity(EventOpacity.getValueOf(evrs.getString("event_opacity")));
        e.setCategory(evrs.getString("eventcategory1_label"));
        e.setTitle(evrs.getString("event_title"));
        e.setLocation(evrs.getString("event_location"));
        cal.setTimeInMillis(evrs.getTimestamp("event_date").getTime());
        e.setStartDate(cal.getTime());
        e.setDuration(JDBCUtils.convertNegativeIntegerToZero(evrs, "event_duration"));
        e.setPriority(evrs.getInt("event_priority"));
        e.setPrivacy(EventPrivacy.valueOf(evrs.getInt("event_privacy")));
        e.setAllday(evrs.getBoolean("event_allday"));
        e.setDescription(evrs.getString("event_description"));
        e.setSequence(evrs.getInt("event_sequence"));
        e.setRecurrence(eventRecurrenceFromCursor(cal, evrs));

        String domainName = evrs.getString("domain_name");
        e.setOwner(evrs.getString("owner"));
        e.setOwnerEmail(getUserObmEmail(evrs, domainName));
        e.setOwnerDisplayName(getOwnerDisplayName(evrs));
        e.setCreatorEmail(getCreatorObmEmail(evrs, domainName));
        e.setCreatorDisplayName(getCreatorDisplayName(evrs));
        Timestamp recurrenceId = evrs.getTimestamp("recurrence_id");
        if (recurrenceId != null) {
            cal.setTimeInMillis(recurrenceId.getTime());
            e.setRecurrenceId(cal.getTime());
        }
        return e;
    }

    private String getOwnerDisplayName(ResultSet evrs) throws SQLException {
        String first = evrs.getString("ownerFirstName");
        String last = evrs.getString("ownerLastName");
        String common = evrs.getString("ownerCommonName");
        return getDisplayName(first, last, common);
    }

    private String getCreatorDisplayName(ResultSet evrs) throws SQLException {
        String first = evrs.getString("creatorFirstName");
        String last = evrs.getString("creatorLastName");
        String common = evrs.getString("creatorCommonName");
        return getDisplayName(first, last, common);
    }

    private String getDisplayName(String firstName, String lastName, String commonName) {
        return DisplayNameUtils.getDisplayName(commonName, firstName, lastName);
    }

    private int fillEventStatement(PreparedStatement ps, Event ev, AccessToken at, int i) throws SQLException {
        int idx = i;
        ps.setString(idx++, ev.getExtId().getExtId());
        ps.setString(idx++, ev.getTimezoneName());
        ps.setObject(idx++, obmHelper.getDBCP().getJdbcObject(ObmHelper.VOPACITY, ev.getOpacity().toString()));
        ps.setString(idx++, ev.getTitle());
        ps.setString(idx++, ev.getLocation());
        Integer cat = catIdFromString(ps.getConnection(), ev.getCategory(), at.getDomain().getId());
        if (cat != null) {
            ps.setInt(idx++, cat);
        } else {
            ps.setNull(idx++, Types.INTEGER);
        }
        ps.setInt(idx++, RFC2445.getPriorityOrDefault(ev.getPriority()));
        ps.setInt(idx++, ev.getPrivacy().toInteger());
        if (ev.getStartDate() != null) {
            ps.setTimestamp(idx++, new Timestamp(ev.getStartDate().getTime()));
        } else {
            ps.setNull(idx++, Types.DATE);
        }
        ps.setInt(idx++, ev.getDuration());
        ps.setBoolean(idx++, ev.isAllday());
        EventRecurrence r = ev.getRecurrence();
        ps.setString(idx++, r.getKind().toString());
        ps.setInt(idx++, r.getFrequence());
        ps.setString(idx++, new RecurrenceDaysSerializer().serialize(r.getDays()));
        if (r.getEnd() != null) {
            ps.setTimestamp(idx++, new Timestamp(r.getEnd().getTime()));
        } else {
            ps.setNull(idx++, Types.DATE);
        }
        ps.setNull(idx++, Types.VARCHAR); // color
        ps.setNull(idx++, Types.DATE); // FIXME completed
        ps.setNull(idx++, Types.VARCHAR); // FIXME url
        ps.setString(idx++, ev.getDescription());
        ps.setInt(idx++, at.getDomain().getId());
        ps.setString(idx++, at.getOrigin());
        ps.setObject(idx++, obmHelper.getDBCP().getJdbcObject(ObmHelper.VCOMPONENT, ev.getType().toString()));
        ps.setInt(idx++, ev.getSequence());
        return idx;
    }

    private List<DeletedEvent> findDeletedEvents(ObmUser calendarUser, Date d, EventType eventType,
            List<DeletedEvent> declined) {

        List<DeletedEvent> result = new LinkedList<DeletedEvent>();
        result.addAll(declined);
        Connection con = null;
        PreparedStatement ps = null;
        ResultSet rs = null;

        String q = "SELECT deletedevent_event_id, deletedevent_event_ext_id FROM DeletedEvent "
                + "WHERE deletedevent_user_id=? AND deletedevent_type=? ";
        if (d != null) {
            q += "AND deletedevent_timestamp >= ?";
        }
        try {
            con = obmHelper.getConnection();
            ps = con.prepareStatement(q);
            ps.setInt(1, calendarUser.getUid());
            ps.setObject(2, obmHelper.getDBCP().getJdbcObject(ObmHelper.VCOMPONENT, eventType.toString()));
            if (d != null) {
                ps.setTimestamp(3, new Timestamp(d.getTime()));
            }

            rs = ps.executeQuery();
            while (rs.next()) {
                result.add(DeletedEvent.builder().eventObmId(rs.getInt(1)).eventExtId(rs.getString(2)).build());
            }
        } catch (SQLException se) {
            logger.error(se.getMessage(), se);
        } finally {
            obmHelper.cleanup(con, ps, rs);
        }

        return result;
    }

    @Override
    public Event findEventById(AccessToken token, EventObmId uid) throws EventNotFoundException, ServerFault {
        String ev = "SELECT " + EVENT_SELECT_FIELDS + ", eventexception_date as recurrence_id " + " FROM Event e "
                + "LEFT JOIN EventCategory1 ON e.event_category1_id=eventcategory1_id "
                + "LEFT JOIN EventException ON e.event_id = eventexception_child_id "
                + "INNER JOIN Domain ON event_domain_id=domain_id "
                + "INNER JOIN EventEntity ON evententity_event_id=event_id "
                + "INNER JOIN UserObm o ON e.event_owner=o.userobm_id "
                + "INNER JOIN UserObm c ON e.event_usercreate=c.userobm_id " + "WHERE event_id=? ";

        PreparedStatement evps = null;
        ResultSet evrs = null;
        Connection con = null;
        try {
            con = obmHelper.getConnection();

            evps = con.prepareStatement(ev);
            evps.setInt(1, uid.getObmId());
            evrs = evps.executeQuery();

            if (evrs.next()) {
                Calendar cal = DateUtils.getCurrentGMTCalendar();
                Event event = eventFromCursor(cal, evrs);
                String domainName = evrs.getString("domain_name");

                Map<EventObmId, Event> eventById = new HashMap<EventObmId, Event>();
                eventById.put(event.getObmId(), event);

                IntegerIndexedSQLCollectionHelper eventIdSQLCollectionHelper = new IntegerIndexedSQLCollectionHelper(
                        ImmutableList.of(event.getObmId()));
                loadAttendees(con, eventById, domainName);
                loadAlerts(con, token, eventById, eventIdSQLCollectionHelper);
                loadExceptions(con, cal, eventById, eventIdSQLCollectionHelper);
                loadEventExceptions(con, token, eventById, eventIdSQLCollectionHelper);

                return event;
            }
        } catch (SQLException e) {
            logger.error(e.getMessage(), e);
            throw new ServerFault(e.getMessage());
        } finally {
            obmHelper.cleanup(con, evps, evrs);
        }
        throw new EventNotFoundException(uid);
    }

    @Override
    public List<String> findEventTwinKeys(String calendar, Event event, ObmDomain domain) {

        String squery = "SELECT DISTINCT event_id from Event "
                + "INNER JOIN EventLink ON eventlink_event_id=event_id "
                + "INNER JOIN UserEntity ON userentity_entity_id=eventlink_entity_id "
                + "INNER JOIN UserObm ON userobm_id=userentity_user_id "
                + "WHERE event_title=? AND userobm_login=? ";
        if (event.isAllday()) {
            squery += "AND event_date >= ? AND event_date <= ? AND (event_duration >= 86400 OR event_allday) ";
        } else {
            squery += "AND event_date=? AND event_duration=? ";
        }
        squery += "AND userobm_domain_id=?";

        PreparedStatement query = null;
        Connection con = null;
        ResultSet rs = null;
        List<String> ret = new LinkedList<String>();

        try {
            con = obmHelper.getConnection();
            query = con.prepareStatement(squery);
            int index = 1;
            query.setString(index++, event.getTitle());
            query.setString(index++, calendar);
            if (event.isAllday()) {

                java.util.Calendar dayAfter = java.util.Calendar.getInstance();
                dayAfter.setTimeZone(TimeZone.getTimeZone("GMT"));
                dayAfter.setTimeInMillis(event.getStartDate().getTime());
                dayAfter.add(java.util.Calendar.HOUR_OF_DAY, 11);

                java.util.Calendar dayBefore = java.util.Calendar.getInstance();
                dayBefore.setTimeZone(TimeZone.getTimeZone("GMT"));
                dayBefore.setTimeInMillis(event.getStartDate().getTime());
                dayBefore.add(java.util.Calendar.HOUR_OF_DAY, -11);

                query.setTimestamp(index++, new java.sql.Timestamp(dayBefore.getTimeInMillis()));

                query.setTimestamp(index++, new java.sql.Timestamp(dayAfter.getTimeInMillis()));
            } else {
                query.setTimestamp(index++, new java.sql.Timestamp(event.getStartDate().getTime()));
                query.setInt(index++, event.getDuration());
            }

            if (domain != null) {
                query.setInt(index++, domain.getId());
            }
            rs = query.executeQuery();
            while (rs.next()) {
                ret.add(rs.getString(1));
            }
            logger.info("Found " + ret.size() + " results with title " + event.getTitle() + " date: "
                    + event.getStartDate() + " duration: " + event.getDuration() + " domain_id: "
                    + (domain != null ? domain.getId() : "null"));
        } catch (Exception e) {
            logger.error(e.getMessage(), e);
        } finally {
            obmHelper.cleanup(con, query, rs);
        }
        return ret;
    }

    @Override
    public List<String> findRefusedEventsKeys(ObmUser calendarUser, Date d) {
        List<Integer> result = new LinkedList<Integer>();
        Connection con = null;
        PreparedStatement ps = null;
        ResultSet rs = null;

        String q = "SELECT eventlink_event_id FROM EventLink, UserEntity WHERE "
                + "eventlink_state='DECLINED' AND eventlink_entity_id=userentity_entity_id AND userentity_user_id=? ";
        if (d != null) {
            q += "AND eventlink_timeupdate >= ?";
        }
        try {
            con = obmHelper.getConnection();
            ps = con.prepareStatement(q);
            ps.setInt(1, calendarUser.getUid());
            if (d != null) {
                ps.setTimestamp(2, new Timestamp(d.getTime()));
            }

            rs = ps.executeQuery();
            while (rs.next()) {
                result.add(rs.getInt(1));
            }
        } catch (SQLException se) {
            logger.error(se.getMessage(), se);
        } finally {
            obmHelper.cleanup(con, ps, rs);
        }

        List<String> ret = new ArrayList<String>(result.size());
        for (Integer eid : result) {
            ret.add(eid.toString());
        }
        return ret;
    }

    private String getUserObmEmail(ResultSet rs, String domainName) throws SQLException {
        String firstEmail = null;
        String userEmailString = rs.getString("userobm_email");
        if (userEmailString != null) {
            String[] alias = userEmailString.split("\r\n");
            if (alias[0].contains("@")) {
                firstEmail = alias[0];
            } else {
                firstEmail = alias[0] + "@" + domainName;
            }
        }
        return firstEmail;
    }

    private String getCreatorObmEmail(ResultSet rs, String domainName) throws SQLException {
        String firstEmail = null;
        String creatorEmailString = rs.getString("creatorEmail");
        if (creatorEmailString != null) {
            String[] alias = creatorEmailString.split("\r\n");
            if (alias[0].contains("@")) {
                firstEmail = alias[0];
            } else {
                firstEmail = alias[0] + "@" + domainName;
            }
        }
        return firstEmail;
    }

    @Override
    public List<FreeBusy> getFreeBusy(ObmDomain domain, FreeBusyRequest fbr) {

        String fb = "SELECT e.event_id, e.event_date, e.event_duration, event_allday"
                + ", e.event_repeatkind, e.event_repeatdays, e.event_repeatfrequence, e.event_endrepeat "
                + "FROM Event e " + "INNER JOIN EventLink att ON att.eventlink_event_id=e.event_id "
                + "LEFT JOIN EventLink organizer ON organizer.eventlink_event_id=e.event_id "
                + "AND organizer.eventlink_entity_id=? " + "WHERE att.eventlink_entity_id = ? "
                + "AND event_type=? "
                + "AND ((event_repeatkind != 'none' AND (event_endrepeat IS NULL OR event_endrepeat >= ?)) "
                + "OR (event_date >= ? AND event_date <= ?) ) " + "AND att.eventlink_state!=? "
                + "AND event_opacity=? " + "AND (event_privacy!=? OR organizer.eventlink_entity_id IS NOT NULL)";

        PreparedStatement ps = null;
        ResultSet rs = null;
        Connection con = null;
        List<FreeBusy> ret = new LinkedList<FreeBusy>();
        try {
            con = obmHelper.getConnection();
            for (Attendee att : fbr.getAttendees()) {

                logger.info("freebusy " + att.getEmail() + " dstart: " + fbr.getStart() + " dend: " + fbr.getEnd());

                ObmUser attendee = userDao.findUser(att.getEmail(), domain);
                ObmUser organizer = userDao.findUser(fbr.getOwner(), domain);

                Calendar cal = getGMTCalendar();
                if (attendee != null) {
                    ps = null;
                    rs = null;
                    try {

                        ps = con.prepareStatement(fb);

                        int idx = 1;
                        ps.setInt(idx++, organizer.getEntityId().getId());
                        ps.setInt(idx++, attendee.getEntityId().getId());
                        ps.setObject(idx++, obmHelper.getDBCP().getJdbcObject(ObmHelper.VCOMPONENT,
                                EventType.VEVENT.toString()));
                        ps.setTimestamp(idx++, new Timestamp(fbr.getStart().getTime()));
                        ps.setTimestamp(idx++, new Timestamp(fbr.getStart().getTime()));
                        ps.setTimestamp(idx++, new Timestamp(fbr.getEnd().getTime()));
                        ps.setObject(idx++,
                                obmHelper.getDBCP().getJdbcObject(ObmHelper.VPARTSTAT, State.DECLINED.toString()));
                        ps.setObject(idx++, obmHelper.getDBCP().getJdbcObject(ObmHelper.VOPACITY,
                                EventOpacity.OPAQUE.toString()));
                        ps.setInt(idx++, EventPrivacy.CONFIDENTIAL.toInteger());
                        rs = ps.executeQuery();
                        FreeBusy freebusy = new FreeBusy();
                        freebusy.setStart(fbr.getStart());
                        freebusy.setEnd(fbr.getEnd());
                        freebusy.setOwner(fbr.getOwner());
                        freebusy.setUid(fbr.getUid());
                        freebusy.setAtt(att);
                        while (rs.next()) {
                            EventRecurrence er = eventRecurrenceFromCursor(cal, rs);
                            cal.setTimeInMillis(rs.getTimestamp("event_date").getTime());

                            if (er == null || RecurrenceKind.none.equals(er.getKind())) {
                                cal.setTimeInMillis(rs.getTimestamp("event_date").getTime());
                                freebusy.addFreeBusyInterval(getFreeBusyInterval(cal.getTime(), rs));
                            } else {
                                Set<Date> extDate = getAllDateEventException(con,
                                        new EventObmId(rs.getInt("event_id")));
                                List<Date> recurDates = ical4jHelper.dateInInterval(er, cal.getTime(),
                                        fbr.getStart(), fbr.getEnd(), extDate);
                                for (Date rd : recurDates) {
                                    FreeBusyInterval line = new FreeBusyInterval();
                                    cal.setTimeInMillis(rd.getTime());
                                    line.setStart(cal.getTime());
                                    line.setAllDay(rs.getBoolean("event_allday"));
                                    line.setDuration(rs.getInt("event_duration"));
                                    freebusy.addFreeBusyInterval(line);
                                }
                            }
                        }

                        ret.add(freebusy);

                        logger.info("freebusy found " + freebusy.getFreeBusyIntervals().size() + " events.");

                    } catch (SQLException e) {
                        logger.error(e.getMessage(), e);
                    } finally {
                        obmHelper.cleanup(null, ps, rs);
                    }
                } else {
                    logger.info("User " + att.getEmail() + " doesn't exist");
                }
            }
        } catch (SQLException e) {
            logger.error(e.getMessage(), e);
        } finally {
            obmHelper.cleanup(con, null, null);
        }
        return ret;
    }

    private FreeBusyInterval getFreeBusyInterval(Date start, ResultSet rs) throws SQLException {
        FreeBusyInterval line = new FreeBusyInterval();
        line.setStart(start);
        line.setAllDay(rs.getBoolean("event_allday"));
        line.setDuration(rs.getInt("event_duration"));
        return line;
    }

    private Set<Date> getAllDateEventException(Connection con, EventObmId id) {
        Set<Date> ret = new HashSet<Date>();

        String q = "SELECT eventexception_date FROM EventException "
                + " INNER JOIN Event ON eventexception_parent_id = event_id" + " WHERE eventexception_parent_id=?";
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            ps = con.prepareStatement(q);
            ps.setInt(1, id.getObmId());
            rs = ps.executeQuery();
            while (rs.next()) {
                Timestamp ts = rs.getTimestamp("eventexception_date");
                Calendar cal = Calendar.getInstance();
                cal.setTime(ts);
                cal.set(Calendar.MILLISECOND, 0);
                ret.add(cal.getTime());
            }
        } catch (Throwable t) {
            logger.error(t.getMessage(), t);
        } finally {
            obmHelper.cleanup(null, ps, rs);
        }
        return ret;
    }

    @Override
    public ResourceInfo getResource(String resourceEmail) throws FindException {
        Connection conn = null;
        try {
            conn = obmHelper.getConnection();
            ResourceLoader loader = ResourceLoader.builder().connection(conn).emails(resourceEmail).build();
            Collection<ResourceInfo> res = loader.load();
            return Iterables.getFirst(res, null);
        } catch (SQLException ex) {
            throw new FindException(ex);
        } finally {
            obmHelper.cleanup(conn, null, null);
        }
    }

    @Override
    public Collection<Event> getResourceEvents(ResourceInfo resourceInfo, SyncRange syncRange)
            throws FindException {
        Calendar cal = getGMTCalendar();
        String domainName = resourceInfo.getDomainName();
        Attendee resourceAtt = ResourceAttendee.builder().email(resourceInfo.getMail()).build();
        Connection conn = null;

        try {
            conn = obmHelper.getConnection();

            EventLoader loader = EventLoader.builder().connection(conn).domainName(domainName).calendar(cal)
                    .occurringBetween(syncRange).usingResources(resourceInfo.getId()).withExceptions(true)
                    .withoutDeclinedAttendee(resourceAtt).withoutMovedExceptions(true).build();
            Map<EventObmId, Event> events = loader.load();
            return events.values();
        } catch (SQLException ex) {
            throw new FindException(ex);
        } finally {
            obmHelper.cleanup(conn, null, null);
        }
    }

    @Override
    public EventChanges getSync(AccessToken token, ObmUser calendarUser, Date lastSync, SyncRange syncRange,
            EventType typeFilter, boolean onEventDate) {

        PreparedStatement evps = null;
        ResultSet evrs = null;
        Connection con = null;
        Calendar cal = getGMTCalendar();
        StringBuilder fetchIds = new StringBuilder();
        fetchIds.append("SELECT e.event_id, att.eventlink_state, e.event_ext_id, ex.eventexception_parent_id ");
        fetchIds.append(" FROM Event e ");
        fetchIds.append("INNER JOIN EventLink att ON att.eventlink_event_id=e.event_id ");
        fetchIds.append("INNER JOIN UserEntity ue ON att.eventlink_entity_id=ue.userentity_entity_id ");
        fetchIds.append("INNER JOIN EventLink attupd ON attupd.eventlink_event_id=e.event_id ");
        fetchIds.append("LEFT JOIN EventException ex ON ex.eventexception_child_id = e.event_id ");
        fetchIds.append("WHERE e.event_type=? AND ue.userentity_user_id=? ");

        // dirty hack to disable need-action to opush & tbird
        if (token.getOrigin().contains("push")) {
            fetchIds.append(" AND att.eventlink_state != 'NEEDS-ACTION' ");
        }

        if (lastSync != null) {
            fetchIds.append(
                    " AND (e.event_timecreate >= ? OR e.event_timeupdate >= ? OR attupd.eventlink_timeupdate >= ?");
            if (onEventDate) {
                fetchIds.append(" OR e.event_date >= ? OR e.event_repeatkind != 'none'");
            }
            fetchIds.append(")");
        }

        if (syncRange != null) {
            fetchIds.append("AND (");
            fetchIds.append(
                    "(e.event_repeatkind != 'none' AND (e.event_endrepeat IS NULL OR e.event_endrepeat >= ?)) OR ");

            fetchIds.append("(e.event_date >= ? ");
            if (syncRange.getBefore() != null) {
                fetchIds.append("AND e.event_date <= ? ");
            }
            fetchIds.append(") )");
            logger.info(token.getUserLogin() + " will use the sync range [ " + syncRange.getAfter() + " - "
                    + syncRange.getBefore() + " ]");
        }

        fetchIds.append(" GROUP BY e.event_id, att.eventlink_state, e.event_ext_id, ex.eventexception_parent_id");

        List<DeletedEvent> declined = new LinkedList<DeletedEvent>();
        Set<Event> parentOfDeclinedRecurrentEvent = Sets.newHashSet();

        StringBuilder fetched = new StringBuilder();
        fetched.append("(0");
        boolean fetchedData = false;
        try {
            con = obmHelper.getConnection();
            evps = con.prepareStatement(fetchIds.toString());
            int idx = 1;
            evps.setObject(idx++, obmHelper.getDBCP().getJdbcObject(ObmHelper.VCOMPONENT, typeFilter.toString()));
            evps.setObject(idx++, calendarUser.getUid());
            if (lastSync != null) {
                evps.setTimestamp(idx++, new Timestamp(lastSync.getTime()));
                evps.setTimestamp(idx++, new Timestamp(lastSync.getTime()));
                evps.setTimestamp(idx++, new Timestamp(lastSync.getTime()));
                if (onEventDate) {
                    evps.setTimestamp(idx++, new Timestamp(lastSync.getTime()));
                }
            }
            if (syncRange != null) {
                // Recurrent events
                evps.setTimestamp(idx++, new Timestamp(syncRange.getAfter().getTime()));
                // Non-recurrent events
                evps.setTimestamp(idx++, new Timestamp(syncRange.getAfter().getTime()));
                if (syncRange.getBefore() != null) {
                    evps.setTimestamp(idx++, new Timestamp(syncRange.getBefore().getTime()));
                }
            }

            evrs = evps.executeQuery();
            while (evrs.next()) {
                int recurentParentId = evrs.getInt(4);
                State state = State.getValueOf(evrs.getString(2));
                Integer eventId = evrs.getInt(1);
                if (state == State.DECLINED) {
                    if (recurentParentId == 0) {
                        declined.add(
                                DeletedEvent.builder().eventObmId(eventId).eventExtId(evrs.getString(3)).build());
                    } else {
                        Event e = findEventById(token, new EventObmId(recurentParentId));
                        parentOfDeclinedRecurrentEvent.add(e);
                    }
                } else {
                    fetchedData = true;
                    if (recurentParentId > 0) {
                        fetched.append(",");
                        fetched.append(recurentParentId);
                    }
                    fetched.append(",");
                    fetched.append(eventId);
                }
            }
        } catch (Throwable t) {
            logger.error(t.getMessage(), t);
        } finally {
            obmHelper.cleanup(con, evps, evrs);
        }
        fetched.append(")");

        List<Event> changedEvent = new LinkedList<Event>();
        Map<EventObmId, Event> eventById = new HashMap<EventObmId, Event>();

        evps = null;
        evrs = null;
        con = null;

        Date lastSyncToBuild = null;
        if (fetchedData) {
            String ev = "SELECT " + EVENT_SELECT_FIELDS + ", eventexception_date as recurrence_id "
                    + " FROM Event e " + "INNER JOIN EventEntity ON e.event_id=evententity_event_id "
                    + "INNER JOIN UserObm o ON e.event_owner=o.userobm_id "
                    + "INNER JOIN UserObm c ON e.event_usercreate=c.userobm_id "
                    + "INNER JOIN Domain ON e.event_domain_id=domain_id "
                    + "LEFT JOIN EventCategory1 ON e.event_category1_id=eventcategory1_id "
                    + "LEFT JOIN EventException ON e.event_id = eventexception_child_id " + "WHERE e.event_id IN "
                    + fetched.toString();

            try {
                con = obmHelper.getConnection();
                evps = con.prepareStatement(ev);
                evrs = evps.executeQuery();
                boolean lastSyncSet = false;
                while (evrs.next()) {
                    if (!lastSyncSet) {
                        lastSyncToBuild = JDBCUtils.getDate(evrs, "last_sync");
                        lastSyncSet = true;
                    }

                    Event e = eventFromCursor(cal, evrs);
                    eventById.put(e.getObmId(), e);
                    changedEvent.add(e);
                }
            } catch (SQLException e) {
                logger.error("error getting events", e);
            } finally {
                obmHelper.cleanup(con, evps, evrs);
            }
        }

        if (lastSyncToBuild == null) {
            if (lastSync != null) {
                Connection conDate = null;
                try {
                    conDate = obmHelper.getConnection();
                    Date newLastSync = obmHelper.selectNow(conDate);
                    if (newLastSync != null) {
                        lastSyncToBuild = newLastSync;
                    } else {
                        lastSyncToBuild = lastSync;
                    }
                } catch (SQLException e) {
                    logger.error("error updating lastsync field", e);
                } finally {
                    obmHelper.cleanup(conDate, null, null);
                }

            } else {
                Calendar ls = Calendar.getInstance();
                ls.set(Calendar.YEAR, 1970);
                lastSyncToBuild = ls.getTime();
            }
        }

        Connection conComp = null;
        Date touchDateForFakeExDates;
        try {
            conComp = obmHelper.getConnection();
            touchDateForFakeExDates = obmHelper.selectNow(conComp);
            if (!changedEvent.isEmpty()) {
                IntegerIndexedSQLCollectionHelper changedIds = new IntegerIndexedSQLCollectionHelper(changedEvent);
                loadAttendees(conComp, eventById, calendarUser.getDomain().getName());
                loadAlerts(conComp, token, eventById, changedIds);
                loadExceptions(conComp, cal, eventById, changedIds);
                loadEventExceptions(conComp, token, eventById, changedIds);
            }

            touchParentOfDeclinedRecurrentEvents(parentOfDeclinedRecurrentEvent, changedEvent,
                    touchDateForFakeExDates);

            if (!changedEvent.isEmpty()) {
                replaceDeclinedEventExceptionByException(calendarUser, changedEvent);
            }
        } catch (SQLException e) {
            logger.error("error loading attendees, alerts, exceptions, eventException", e);
        } finally {
            obmHelper.cleanup(conComp, null, null);
        }

        Iterable<DeletedEvent> deletedEvents = Iterables.concat(
                findDeletedEvents(calendarUser, lastSync, typeFilter, declined),
                findDeletedEventsLinks(calendarUser, lastSync));

        EventChanges syncEventChanges = EventChanges.builder().lastSync(lastSyncToBuild).updates(changedEvent)
                .deletes(Sets.newHashSet(deletedEvents)).build();

        return syncEventChanges;
    }

    private Collection<DeletedEvent> findDeletedEventsLinks(ObmUser calendarUser, Date lastSync) {
        List<DeletedEvent> result = new LinkedList<DeletedEvent>();
        Connection con = null;
        PreparedStatement ps = null;
        ResultSet rs = null;

        String q = "SELECT deletedeventlink_event_id, deletedeventlink_event_ext_id FROM DeletedEventLink WHERE deletedeventlink_userobm_id=? ";
        if (lastSync != null) {
            q += "AND deletedeventlink_time_removed >= ? ";
        }
        try {
            con = obmHelper.getConnection();
            ps = con.prepareStatement(q);
            ps.setInt(1, calendarUser.getUid());
            if (lastSync != null) {
                ps.setTimestamp(2, new Timestamp(lastSync.getTime()));
            }
            rs = ps.executeQuery();
            while (rs.next()) {
                result.add(DeletedEvent.builder().eventObmId(rs.getInt(1)).eventExtId(rs.getString(2)).build());
            }
        } catch (SQLException se) {
            logger.error(se.getMessage(), se);
        } finally {
            obmHelper.cleanup(con, ps, rs);
        }
        return result;
    }

    @VisibleForTesting
    void touchParentOfDeclinedRecurrentEvents(Set<Event> parentOfDeclinedRecurrentEvent, List<Event> changedEvents,
            Date touchDateForFakeExDates) {
        for (Event parentEvent : parentOfDeclinedRecurrentEvent) {
            Event eventToTouch = getParentEventInChangesByUid(parentEvent.getUid(), changedEvents);
            if (eventToTouch == null) {
                changedEvents.add(parentEvent);
                eventToTouch = parentEvent;
            }
            // Do a 'touch' on the event since we added a "fake"
            // exdate (to force the client to remove declined
            // exceptions)
            eventToTouch.setTimeUpdate(touchDateForFakeExDates);
        }
    }

    private Event getParentEventInChangesByUid(EventObmId id, List<Event> changedEvents) {
        for (Event event : changedEvents) {
            if (event.getUid().equals(id)) {
                return event;
            }
        }
        return null;
    }

    private void replaceDeclinedEventExceptionByException(ObmUser calendarUser, List<Event> changedEvent) {
        for (Event event : changedEvent) {
            if (event.isRecurrent()) {
                event.getRecurrence().replaceUnattendedEventExceptionByException(calendarUser.getEmailAtDomain());
            }
        }
    }

    private String buildUserCalendarsQuery(Collection<String> calendarEmails, String pattern) {
        String query = "select userobm_login, userobm_firstname, userobm_lastname, userobm_email, entityright_read, entityright_write "
                + "from EntityRight "
                + "inner join UserEntity u1 on entityright_consumer_id=u1.userentity_entity_id "
                + "inner join CalendarEntity u2 on u2.calendarentity_entity_id=entityright_entity_id "
                + "inner join UserObm on userobm_id=u2.calendarentity_calendar_id "
                + "where u1.userentity_user_id=? and (entityright_read=1 or entityright_write=1) "
                + "and userobm_email is not null and userobm_email != '' and userobm_archive != 1 "
                + "and userobm_id != ? " + SQLUtils.selectCalendarsCondition(calendarEmails)
                + SQLUtils.selectUsersMatchingPatternCondition(pattern);

        return query;
    }

    private String buildPublicCalendarsQuery(Collection<String> calendarEmails, String pattern) {
        String query = "select userobm_login, userobm_firstname, userobm_lastname, userobm_email, entityright_read, entityright_write "
                + "from EntityRight "
                + "inner join CalendarEntity u2 on u2.calendarentity_entity_id=entityright_entity_id "
                + "inner join UserObm on userobm_id=u2.calendarentity_calendar_id "
                + "where entityright_consumer_id is null and (entityright_read=1 or entityright_write=1) "
                + "and userobm_email is not null and userobm_email != '' and userobm_archive != 1 "
                + "and userobm_domain_id= ? " + "and userobm_id != ? "
                + SQLUtils.selectCalendarsCondition(calendarEmails)
                + SQLUtils.selectUsersMatchingPatternCondition(pattern);

        return query;
    }

    private String buildGroupCalendarsQuery(Collection<String> calendarEmails, String pattern) {
        String query = "select userobm_login, userobm_firstname, userobm_lastname, userobm_email, entityright_read, entityright_write "
                + "from EntityRight "
                + "inner join GroupEntity u1 on entityright_consumer_id=u1.groupentity_entity_id "
                + "inner join CalendarEntity u2 on u2.calendarentity_entity_id=entityright_entity_id "
                + "inner join UserObm on userobm_id=u2.calendarentity_calendar_id "
                + "inner join of_usergroup on of_usergroup_group_id = u1.groupentity_group_id "
                + "where of_usergroup_user_id=? "
                + "and userobm_email is not null and userobm_email != '' and userobm_archive != 1 "
                + "and userobm_id != ? " + SQLUtils.selectCalendarsCondition(calendarEmails)
                + SQLUtils.selectUsersMatchingPatternCondition(pattern);

        return query;
    }

    private String buildOwnCalendarQuery() {
        return "SELECT ?, ?, ?, ?, 1, 1";
    }

    private String buildPublicAndUserAndGroupCalendarsQuery(String publicQuery, String groupQuery, String userQuery,
            Integer limit, Integer offset) {
        return buildCalendarsQuery(String.format("%s UNION %s UNION %s", publicQuery, groupQuery, userQuery), limit,
                offset);
    }

    private String buildPublicAndUserAndGroupAndOwnCalendarsQuery(String publicQuery, String groupQuery,
            String userQuery, String ownQuery, Integer limit, Integer offset) {
        return buildCalendarsQuery(
                String.format("%s UNION %s UNION %s UNION %s", publicQuery, groupQuery, userQuery, ownQuery), limit,
                offset);
    }

    @VisibleForTesting
    String buildCalendarsQuery(String unions, Integer limit, Integer offset) {
        Preconditions.checkArgument(limit == null || limit >= 0, "limit must be a positive integer");
        Preconditions.checkArgument(limit == null || (offset != null && offset >= 0),
                "offset must be a positive integer");

        String query = String.format(
                "SELECT userobm_login, userobm_firstname, userobm_lastname, userobm_email, MAX(entityright_read), MAX(entityright_write) "
                        + "FROM (%s) calendars_union "
                        + "GROUP BY userobm_login, userobm_firstname, userobm_lastname, userobm_email "
                        + "ORDER BY userobm_lastname, userobm_firstname ASC ",
                unions);

        if (limit != null) {
            query += String.format("LIMIT %d OFFSET %d", limit, offset);
        }

        return query;
    }

    private Collection<CalendarInfo> listUserAndPublicCalendars(ObmUser user, Collection<String> emails,
            Integer limit, Integer offset, String pattern) throws FindException {
        StringSQLCollectionHelper helper = null;
        boolean useOwnEmail = userMatchesPattern(user, pattern);

        if (emails != null && !emails.isEmpty()) {
            helper = new WildcardStringSQLCollectionHelper(emails);
            useOwnEmail = emails.contains(user.getEmailAtDomain());
        }

        String publicQuery = buildPublicCalendarsQuery(emails, pattern);
        String userQuery = buildUserCalendarsQuery(emails, pattern);
        String groupQuery = buildGroupCalendarsQuery(emails, pattern);
        String query = !useOwnEmail
                ? buildPublicAndUserAndGroupCalendarsQuery(publicQuery, groupQuery, userQuery, limit, offset)
                : buildPublicAndUserAndGroupAndOwnCalendarsQuery(publicQuery, groupQuery, userQuery,
                        buildOwnCalendarQuery(), limit, offset);

        Connection con = null;
        ResultSet rs = null;
        PreparedStatement ps = null;
        List<CalendarInfo> caldendarInfo = Lists.newArrayList();
        String domainName = user.getDomain().getName();

        try {
            con = obmHelper.getConnection();
            ps = con.prepareStatement(query);

            int pos = 1;

            // For the public query
            ps.setInt(pos++, user.getDomain().getId());
            ps.setInt(pos++, user.getUid());
            if (helper != null) {
                pos = helper.insertValues(ps, pos);
            }
            pos = setPatternParametersInStatement(ps, pos, pattern, USERS_PATTERN_MATCHING_FIELDS_COUNT);

            // For the group query
            ps.setInt(pos++, user.getUid());
            ps.setInt(pos++, user.getUid());
            if (helper != null) {
                pos = helper.insertValues(ps, pos);
            }
            pos = setPatternParametersInStatement(ps, pos, pattern, USERS_PATTERN_MATCHING_FIELDS_COUNT);

            // For the user query
            ps.setInt(pos++, user.getUid());
            ps.setInt(pos++, user.getUid());
            if (helper != null) {
                pos = helper.insertValues(ps, pos);
            }
            pos = setPatternParametersInStatement(ps, pos, pattern, USERS_PATTERN_MATCHING_FIELDS_COUNT);

            // For our own calendar query
            if (useOwnEmail) {
                ps.setString(pos++, user.getLogin());
                ps.setString(pos++, user.getFirstName());
                ps.setString(pos++, user.getLastName());
                ps.setString(pos++, user.getEmailAtDomain());
            }

            rs = ps.executeQuery();

            while (rs.next()) {
                caldendarInfo.add(makeCalendarInfo(rs, domainName));
            }
        } catch (SQLException e) {
            logger.error("Error listing calendar rights.", e);
            throw new FindException(e);
        } finally {
            obmHelper.cleanup(con, ps, rs);
        }

        return caldendarInfo;
    }

    @VisibleForTesting
    boolean userMatchesPattern(ObmUser user, String pattern) {
        if (user == null || Strings.isNullOrEmpty(pattern)) {
            return true;
        }

        return startsWithIgnoreCase(user.getLogin(), pattern) || startsWithIgnoreCase(user.getLastName(), pattern)
                || startsWithIgnoreCase(user.getFirstName(), pattern);
    }

    private int setPatternParametersInStatement(PreparedStatement ps, int pos, String pattern, int nbMatchingFields)
            throws SQLException {
        if (!Strings.isNullOrEmpty(pattern)) {
            for (int i = 0; i < nbMatchingFields; i++) {
                ps.setString(pos++, pattern.toLowerCase() + '%');
            }
        }

        return pos;
    }

    @Override
    public Collection<CalendarInfo> listCalendars(ObmUser user, Integer limit, Integer offset, String pattern)
            throws FindException {
        return listUserAndPublicCalendars(user, null, limit, offset, pattern);
    }

    @Override
    public Collection<ResourceInfo> listResources(ObmUser user, Integer limit, Integer offset, String pattern)
            throws FindException {
        return listUserAndPublicResources(user, null, limit, offset, pattern);
    }

    private String buildUserResourcesQuery(StringSQLCollectionHelper helper, String pattern) {
        String query = "SELECT resource_id, resource_name, resource_email, resource_description, e.entityright_read, e.entityright_write "
                + "FROM Resource r "
                + "INNER JOIN ResourceEntity re ON r.resource_id=re.resourceentity_resource_id "
                + "INNER JOIN EntityRight e ON re.resourceentity_entity_id =e.entityright_entity_id "
                + "INNER JOIN UserEntity ue ON e.entityright_consumer_id=ue.userentity_entity_id "
                + "WHERE ue.userentity_user_id=? " + SQLUtils.selectResourcesMatchingPatternCondition(pattern);

        if (helper != null)
            query += " AND r.resource_email IN (" + helper.asPlaceHolders() + ")";

        return query;
    }

    private String buildPublicResourcesQuery(StringSQLCollectionHelper helper, String pattern) {
        String query = "SELECT resource_id, resource_name, resource_email, resource_description, e.entityright_read, e.entityright_write "
                + "FROM Resource r "
                + "INNER JOIN ResourceEntity re ON r.resource_id=re.resourceentity_resource_id "
                + "INNER JOIN EntityRight e ON re.resourceentity_entity_id =e.entityright_entity_id "
                + "WHERE e.entityright_consumer_id IS NULL "
                + SQLUtils.selectResourcesMatchingPatternCondition(pattern);

        if (helper != null)
            query += " AND r.resource_email IN (" + helper.asPlaceHolders() + ")";

        return query;
    }

    private String buildGroupResourcesQuery(StringSQLCollectionHelper helper, String pattern) {
        String query = "SELECT resource_id, resource_name, resource_email, resource_description, e.entityright_read, e.entityright_write "
                + "FROM Resource r "
                + "INNER JOIN ResourceEntity re ON r.resource_id=re.resourceentity_resource_id "
                + "INNER JOIN EntityRight e ON re.resourceentity_entity_id =e.entityright_entity_id "
                + "INNER JOIN GroupEntity ge ON e.entityright_consumer_id=ge.groupentity_entity_id "
                + "INNER JOIN of_usergroup ug ON ge.groupentity_group_id=ug.of_usergroup_group_id "
                + "WHERE ug.of_usergroup_user_id=? " + SQLUtils.selectResourcesMatchingPatternCondition(pattern);

        if (helper != null)
            query += " AND r.resource_email IN (" + helper.asPlaceHolders() + ")";

        return query;
    }

    @VisibleForTesting
    String buildPublicAndUserAndGroupResourcesQuery(String publicQuery, String groupQuery, String userQuery,
            Integer limit, Integer offset) {
        Preconditions.checkArgument(limit == null || limit >= 0, "limit must be a positive integer");
        Preconditions.checkArgument(limit == null || (offset != null && offset >= 0),
                "offset must be a positive integer");

        String query = String.format(
                "SELECT resource_id, resource_name, resource_email, resource_description, SUM(entityright_read), SUM(entityright_write) "
                        + "FROM (%s UNION %s UNION %s) resource_union "
                        + "GROUP BY resource_id, resource_name, resource_email, resource_description "
                        + "ORDER BY resource_name ASC ",
                publicQuery, groupQuery, userQuery);

        if (limit != null) {
            query += String.format("LIMIT %d OFFSET %d", limit, offset);
        }

        return query;
    }

    private Collection<ResourceInfo> listUserAndPublicResources(ObmUser user, Collection<String> emails,
            Integer limit, Integer offset, String pattern) throws FindException {
        StringSQLCollectionHelper helper = null;
        if (emails != null && !emails.isEmpty()) {
            helper = new StringSQLCollectionHelper(emails);
        }
        String publicQuery = buildPublicResourcesQuery(helper, pattern);
        String userQuery = buildUserResourcesQuery(helper, pattern);
        String groupQuery = buildGroupResourcesQuery(helper, pattern);
        String query = buildPublicAndUserAndGroupResourcesQuery(publicQuery, groupQuery, userQuery, limit, offset);

        Connection con = null;
        ResultSet rs = null;
        PreparedStatement ps = null;
        List<ResourceInfo> resourceInfo = Lists.newArrayList();
        String domainName = user.getDomain().getName();
        try {
            con = obmHelper.getConnection();
            ps = con.prepareStatement(query);

            int pos = 1;

            // For the public query
            if (helper != null) {
                pos = helper.insertValues(ps, pos);
            }
            pos = setPatternParametersInStatement(ps, pos, pattern, RESOURCES_PATTERN_MATCHING_FIELDS_COUNT);

            // For the group query
            ps.setInt(pos, user.getUid());
            pos++;
            if (helper != null) {
                pos = helper.insertValues(ps, pos);
            }
            pos = setPatternParametersInStatement(ps, pos, pattern, RESOURCES_PATTERN_MATCHING_FIELDS_COUNT);

            // For the user query
            ps.setInt(pos, user.getUid());
            pos++;
            if (helper != null) {
                pos = helper.insertValues(ps, pos);
            }
            pos = setPatternParametersInStatement(ps, pos, pattern, RESOURCES_PATTERN_MATCHING_FIELDS_COUNT);

            rs = ps.executeQuery();

            while (rs.next()) {
                resourceInfo.add(buildResourceInfo(rs, domainName));
            }
        } catch (SQLException e) {
            logger.error("Error finding resources", e);
            throw new FindException(e);
        } finally {
            try {
                obmHelper.cleanup(con, ps, rs);
            } catch (Exception e) {
                logger.error("Could not clean up jdbc stuff", e);
            }
        }
        return resourceInfo;
    }

    private ResourceInfo buildResourceInfo(ResultSet rs, String domainName) throws SQLException {
        return ResourceInfo.builder().id(rs.getInt(1)).name(rs.getString(2)).mail(rs.getString(3))
                .description(rs.getString(4)).read(rs.getBoolean(5)).write(rs.getBoolean(6)).domainName(domainName)
                .build();
    }

    @Override
    public Collection<CalendarInfo> getCalendarMetadata(ObmUser user, Collection<String> calendarEmails)
            throws FindException {
        return this.listUserAndPublicCalendars(user, calendarEmails, null, null, null);
    }

    @Override
    public Collection<ResourceInfo> getResourceMetadata(ObmUser user, Collection<String> resourceEmails)
            throws FindException {
        return this.listUserAndPublicResources(user, resourceEmails, null, null, null);
    }

    private CalendarInfo makeCalendarInfo(ResultSet rs, String domainName) throws SQLException {
        String email = constructEmailFromList(rs.getString(4), domainName);

        CalendarInfo info = new CalendarInfo();
        info.setUid(rs.getString(1));
        info.setFirstname(rs.getString(2));
        info.setLastname(rs.getString(3));
        info.setMail(email);
        info.setRead(rs.getBoolean(5));
        info.setWrite(rs.getBoolean(6));
        if (info.isWrite()) {
            info.setRead(true);
        }
        return info;
    }

    public String constructEmailFromList(String listofmail, String domain) {
        String[] lemail = null;
        if (listofmail != null) {
            lemail = listofmail.split("\r\n");
            if (lemail.length > 0) {

                if (lemail[0].contains("@")) {
                    return lemail[0];
                }
                return lemail[0] + "@" + domain;
            }
        }
        return "";
    }

    private void loadAttendees(Connection con, Map<EventObmId, Event> eventById, String domainName)
            throws SQLException {
        if (eventById.isEmpty()) {
            return;
        }
        AttendeeLoader attendeeLoader = AttendeeLoader.builder().connection(con).domainName(domainName)
                .eventsById(eventById).build();
        attendeeLoader.load();
        defineEventsInternalStatus(eventById.values());
    }

    public Integer getEventAlertForUser(EventObmId eventId, Integer userId) {
        ResultSet rs = null;
        PreparedStatement ps = null;
        Connection connection = null;
        String query = "SELECT eventalert_duration FROM EventAlert WHERE eventalert_event_id = ? AND eventalert_user_id = ?";

        try {
            connection = obmHelper.getConnection();
            ps = connection.prepareStatement(query);

            ps.setInt(1, eventId.getObmId());
            ps.setInt(2, userId);

            rs = ps.executeQuery();

            if (rs.next()) {
                return rs.getInt(1);
            }
        } catch (SQLException e) {
            logger.error("Failed to get event alert.", e);
        } finally {
            obmHelper.cleanup(connection, ps, rs);
        }

        return null;
    }

    private void loadAlerts(Connection con, AccessToken token, Map<EventObmId, Event> eventById,
            IntegerSQLCollectionHelper eventIds) throws SQLException {

        String alertsQuery = "SELECT eventalert_event_id, eventalert_duration " + "FROM EventAlert "
                + "WHERE eventalert_event_id IN (" + eventIds.asPlaceHolders() + ") "
                + "AND eventalert_user_id = ?";

        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            ps = con.prepareStatement(alertsQuery);
            int nextId = eventIds.insertValues(ps, 1);
            ps.setInt(nextId, token.getObmId());
            rs = ps.executeQuery();
            while (rs.next()) {
                EventObmId eventId = new EventObmId(rs.getInt("eventalert_event_id"));
                int alertDuration = rs.getInt("eventalert_duration");
                //eventalert_duration is sometimes set to -1 to disable an alert, 
                //this behaviour does not conform to the rfc but happens in OBM nonetheless
                if (alertDuration >= 0) {
                    Event event = eventById.get(eventId);
                    event.setAlert(alertDuration);
                }
            }
        } finally {
            obmHelper.cleanup(null, ps, rs);
        }
    }

    private void defineEventsInternalStatus(Collection<Event> events) {
        for (Event evt : events) {
            evt.setInternalEvent(EventUtils.isInternalEvent(evt));
        }
    }

    private void loadEventExceptions(Connection con, AccessToken token, Map<EventObmId, Event> eventById,
            AbstractSQLCollectionHelper<?> eventIds) throws SQLException {
        String query = "SELECT " + EVENT_SELECT_FIELDS + ", eventexception_date as recurrence_id "
                + ", eventexception_parent_id as parent_id FROM Event e "
                + "LEFT JOIN EventCategory1 ON e.event_category1_id=eventcategory1_id "
                + "INNER JOIN Domain ON event_domain_id=domain_id "
                + "INNER JOIN EventEntity ON evententity_event_id=event_id "
                + "INNER JOIN UserObm o ON e.event_owner=o.userobm_id "
                + "INNER JOIN UserObm c ON e.event_usercreate=c.userobm_id "
                + "INNER JOIN EventException ON e.event_id = eventexception_child_id "
                + "WHERE eventexception_parent_id IN (" + eventIds.asPlaceHolders() + ") "
                + "OR eventexception_child_id IN (" + eventIds.asPlaceHolders() + ") ";

        PreparedStatement ps = null;
        ResultSet rs = null;

        String domainName = null;

        Map<EventObmId, Event> evenExcepttById = new HashMap<EventObmId, Event>();
        Multimap<Event, Event> eventChildren = ArrayListMultimap.create();
        List<Event> changedEvent = new LinkedList<Event>();
        Calendar cal = getGMTCalendar();
        try {

            ps = con.prepareStatement(query);
            int nextId = eventIds.insertValues(ps, 1);
            eventIds.insertValues(ps, nextId);
            rs = ps.executeQuery();

            while (rs.next()) {
                Event eventExcept = eventFromCursor(cal, rs);
                cal.setTimeInMillis(rs.getTimestamp("recurrence_id").getTime());
                eventExcept.setRecurrenceId(cal.getTime());
                domainName = rs.getString("domain_name");
                EventObmId eventId = new EventObmId(rs.getInt("parent_id"));
                Event event = eventById.get(eventId);
                if (event != null) {
                    eventChildren.put(event, eventExcept);
                    changedEvent.add(eventExcept);
                    evenExcepttById.put(eventExcept.getObmId(), eventExcept);
                }
            }
            IntegerIndexedSQLCollectionHelper changedIds = new IntegerIndexedSQLCollectionHelper(changedEvent);
            loadAttendees(con, evenExcepttById, domainName);
            loadAlerts(con, token, evenExcepttById, changedIds);

            for (Entry<Event, Event> entry : eventChildren.entries()) {
                entry.getKey().addEventException(entry.getValue());
            }

        } finally {
            obmHelper.cleanup(null, ps, rs);
        }
    }

    private void loadExceptions(Connection con, Calendar cal, Map<EventObmId, Event> eventById,
            AbstractSQLCollectionHelper<?> eventIds) throws SQLException {
        if (eventById.isEmpty()) {
            return;
        }
        String exceps = "SELECT " + EXCEPS_FIELDS
                + " FROM Event e LEFT JOIN EventException on event_id=eventexception_parent_id "
                + "WHERE event_id IN (" + eventIds.asPlaceHolders() + ") AND eventexception_child_id IS NULL";
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            ps = con.prepareStatement(exceps);
            eventIds.insertValues(ps, 1);
            rs = ps.executeQuery();
            while (rs.next()) {
                EventObmId eventId = new EventObmId(rs.getInt(1));
                Event e = eventById.get(eventId);
                EventRecurrence er = e.getRecurrence();
                Timestamp t = rs.getTimestamp(2);
                if (t != null) {
                    cal.setTimeInMillis(t.getTime());
                    er.addException(cal.getTime());
                }
            }
        } finally {
            obmHelper.cleanup(null, ps, rs);
        }
    }

    private EventObmId markUpdated(Connection con, EventObmId eventObmId) throws SQLException {
        PreparedStatement st = null;
        try {
            st = con.prepareStatement("UPDATE Event SET event_timeupdate=? WHERE event_id=?");
            st.setTimestamp(1, new Timestamp(obmHelper.selectNow(con).getTime()));
            st.setInt(2, eventObmId.getObmId());
            st.execute();
        } finally {
            obmHelper.cleanup(null, st, null);
        }
        return eventObmId;
    }

    @Override
    public Event modifyEventForcingSequence(AccessToken at, String calendar, Event ev, boolean updateAttendees,
            int sequence, Boolean useObmUser)
            throws SQLException, FindException, ServerFault, EventNotFoundException {

        logger.info("should modify event with title " + ev.getTitle() + " date: " + ev.getStartDate() + " id: "
                + ev.getObmId());

        Connection con = null;

        try {
            con = obmHelper.getConnection();
            modifyEventForcingSequence(con, at, calendar, ev, updateAttendees, sequence, useObmUser);
        } finally {
            obmHelper.cleanup(con, null, null);
        }

        return findEventById(at, ev.getObmId());
    }

    @Override
    public Event modifyEvent(AccessToken at, String calendar, Event ev, boolean updateAttendees, Boolean useObmUser)
            throws SQLException, FindException, EventNotFoundException, ServerFault {

        logger.info("should modify event with title " + ev.getTitle() + " date: " + ev.getStartDate() + " id: "
                + ev.getObmId());

        Connection con = null;

        try {
            con = obmHelper.getConnection();
            modifyEvent(con, at, calendar, ev, updateAttendees, useObmUser);
        } finally {
            obmHelper.cleanup(con, null, null);
        }

        return findEventById(at, ev.getObmId());
    }

    @Override
    public void modifyEvent(Connection con, AccessToken editor, String calendar, Event ev, boolean updateAttendees,
            Boolean useObmUser) throws SQLException, FindException, ServerFault, EventNotFoundException {

        modifyEventForcingSequence(con, editor, calendar, ev, updateAttendees, ev.getSequence(), useObmUser);
    }

    @Override
    @AutoTruncate
    public void modifyEventForcingSequence(Connection con, AccessToken editor, String calendar,
            @DatabaseEntity Event ev, boolean updateAttendees, int sequence, Boolean useObmUser)
            throws SQLException, FindException, ServerFault, EventNotFoundException {

        Event old = findEventById(editor, ev.getObmId());
        List<Attendee> attendeetoRemove = Lists.newArrayList(old.getAttendees());
        attendeetoRemove.removeAll(ev.getAttendees());

        old.getRecurrence().getEventExceptions().removeAll(ev.getRecurrence().getEventExceptions());

        PreparedStatement ps = null;

        try {

            ps = createEventUpdateStatement(con, editor, ev, sequence);
            ps.executeUpdate();
            ps.close();
            ps = null;
            if (updateAttendees) {
                removeAttendees(con, attendeetoRemove, ev);
                insertDeletedEventLinks(editor, con, attendeetoRemove, ev);
            }

            if (updateAttendees) {
                updateAttendees(editor, con, ev);
                markUpdated(con, ev.getObmId());
            }

            int ownerId = userDao.userIdFromEmail(con, calendar, editor.getDomain().getId());
            updateAlerts(editor, con, ev, ownerId);

            removeAllException(con, ev);

            insertExceptions(editor, ev, con, ev.getObmId());
            if (ev.isRecurrent()) {
                insertEventExceptions(editor, calendar, ev.getRecurrence().getEventExceptions(), con, ev.getObmId(),
                        useObmUser);
            }
        } finally {
            obmHelper.cleanup(null, ps, null);
        }

        indexEvent(editor, ev);
    }

    private void insertDeletedEventLinks(AccessToken editor, Connection con, List<Attendee> attendeetoRemove,
            Event ev) throws SQLException {
        String q = "INSERT INTO DeletedEventLink ( deletedeventlink_userobm_id, deletedeventlink_event_id, deletedeventlink_event_ext_id ) VALUES ( ?, ?, ? ) ";
        PreparedStatement ps = null;
        logger.info("Event Modification : will insert {} deleted event links.", attendeetoRemove.size());

        List<Integer> attendeeUserIds = filterOutContactsAttendees(editor, con, attendeetoRemove);

        try {
            ps = con.prepareStatement(q);

            for (Integer id : attendeeUserIds) {
                ps.setInt(1, id);
                ps.setInt(2, ev.getObmId().getObmId());
                ps.setString(3, ev.getExtId().getExtId());
                ps.addBatch();
            }

            ps.executeBatch();
        } finally {
            obmHelper.cleanup(null, ps, null);
        }
    }

    private List<Integer> filterOutContactsAttendees(AccessToken editor, Connection con,
            List<Attendee> attendeetoRemove) throws SQLException {
        List<Integer> attendeeUserIds = new ArrayList<Integer>();
        for (Attendee at : attendeetoRemove) {
            Integer id = userDao.userIdFromEmail(con, at.getEmail(), editor.getDomain().getId());

            if (id != null) {
                attendeeUserIds.add(id);
            }
        }
        return attendeeUserIds;
    }

    private PreparedStatement createEventUpdateStatement(Connection con, AccessToken at, Event ev, int sequence)
            throws SQLException {
        PreparedStatement ps;
        String upQ = "UPDATE Event SET event_userupdate=?, " + "event_type=?, event_timezone=?, event_opacity=?, "
                + "event_title=?, event_location=?, " + "event_category1_id=?, event_priority=?, "
                + "event_privacy=?, event_date=?, event_duration=?, " + "event_allday=?, event_repeatkind=?, "
                + "event_repeatfrequence=?, event_repeatdays=?, " + "event_endrepeat=?, event_completed=?, "
                + "event_url=?, event_description=?, event_origin=?, " + "event_sequence=? " + "WHERE event_id=?";

        ps = con.prepareStatement(upQ);
        try {
            ps.setInt(1, at.getObmId());
            ps.setObject(2, obmHelper.getDBCP().getJdbcObject(ObmHelper.VCOMPONENT, ev.getType().toString()));
            ps.setString(3, ev.getTimezoneName() != null ? ev.getTimezoneName() : "Europe/Paris");
            ps.setObject(4, obmHelper.getDBCP().getJdbcObject(ObmHelper.VOPACITY, ev.getOpacity().toString()));
            ps.setString(5, ev.getTitle());
            ps.setString(6, ev.getLocation());
            Integer cat = catIdFromString(con, ev.getCategory(), at.getDomain().getId());
            if (cat != null) {
                ps.setInt(7, cat);
            } else {
                ps.setNull(7, Types.INTEGER);
            }
            ps.setInt(8, ev.getPriority());
            // do not allow making a private event become public from sync
            // ps.setInt(9, old.getPrivacy() != 1 ? ev.getPrivacy() : old
            // .getPrivacy());
            ps.setInt(9, ev.getPrivacy().toInteger());
            ps.setTimestamp(10, new Timestamp(ev.getStartDate().getTime()));
            ps.setInt(11, ev.getDuration());
            ps.setBoolean(12, ev.isAllday());
            EventRecurrence er = ev.getRecurrence();
            ps.setString(13, er.getKind().toString());
            ps.setInt(14, er.getFrequence());
            ps.setString(15, new RecurrenceDaysSerializer().serialize(er.getDays()));
            if (er.getEnd() != null) {
                ps.setTimestamp(16, new Timestamp(er.getEnd().getTime()));
            } else {
                ps.setNull(16, Types.TIMESTAMP);
            }
            ps.setNull(17, Types.TIMESTAMP);
            ps.setNull(18, Types.VARCHAR);
            ps.setString(19, ev.getDescription());
            ps.setString(20, at.getOrigin());
            ps.setInt(21, sequence);
            ps.setInt(22, ev.getObmId().getObmId());
            return ps;
        } catch (SQLException e) {
            ps.close();
            throw e;
        } catch (RuntimeException e) {
            ps.close();
            throw e;
        }
    }

    private void removeEventExceptions(Connection con, EventObmId idEventParent) throws SQLException {
        logger.info("event update will remove all eventException for event " + idEventParent + ".");

        List<EventObmId> toDel = new LinkedList<EventObmId>();
        PreparedStatement idsFetch = null;
        ResultSet rs = null;
        try {
            idsFetch = con.prepareStatement(
                    "SELECT eventexception_child_id FROM EventException WHERE eventexception_parent_id=?");
            idsFetch.setInt(1, idEventParent.getObmId());
            rs = idsFetch.executeQuery();
            while (rs.next()) {
                toDel.add(new EventObmId(rs.getInt(1)));
            }
        } finally {
            obmHelper.cleanup(null, idsFetch, rs);
        }

        IntegerIndexedSQLCollectionHelper toDeleteIds = new IntegerIndexedSQLCollectionHelper(toDel);

        PreparedStatement dev = null;
        try {
            dev = con.prepareStatement(
                    "DELETE FROM Event WHERE event_id IN (" + toDeleteIds.asPlaceHolders() + ") ");
            toDeleteIds.insertValues(dev, 1);
            dev.executeUpdate();
        } finally {
            obmHelper.cleanup(null, dev, null);
        }

        String q = "DELETE FROM EventException "
                + "WHERE eventexception_parent_id=? AND eventexception_child_id IS NOT NULL";
        // FIXME need to delete also event in mysql ?
        PreparedStatement ps = null;
        try {
            ps = con.prepareStatement(q);
            ps.setInt(1, idEventParent.getObmId());
            ps.executeUpdate();
        } finally {
            obmHelper.cleanup(null, ps, null);
        }
    }

    private void removeAttendees(Connection con, List<Attendee> toRemove, Event ev) throws SQLException {
        PreparedStatement ps = null;
        String q = "DELETE FROM EventLink WHERE eventlink_event_id=? AND eventlink_entity_id=? ";

        logger.info("event update will remove {} attendees.", toRemove.size());
        try {
            ps = con.prepareStatement(q);

            for (Attendee at : toRemove) {
                ps.setInt(1, ev.getObmId().getObmId());
                ps.setInt(2, at.getEntityId().getId());
                ps.addBatch();
            }

            ps.executeBatch();
        } finally {
            obmHelper.cleanup(null, ps, null);
        }
    }

    private void removeAllException(Connection con, Event eventParent) throws SQLException {
        removeEventExceptions(con, eventParent.getObmId());
        PreparedStatement ps = null;
        try {
            ps = con.prepareStatement("delete from EventException where eventexception_parent_id=?");
            ps.setInt(1, eventParent.getObmId().getObmId());
            ps.executeUpdate();
        } finally {
            obmHelper.cleanup(null, ps, null);
        }
    }

    @Override
    public Event removeEvent(AccessToken token, Event event, EventType eventType, int sequence)
            throws SQLException {
        Event deletedEvent = null;
        Connection con = null;
        try {
            con = obmHelper.getConnection();
            deletedEvent = removeEvent(con, token, eventType, event);
        } finally {
            obmHelper.cleanup(con, null, null);
        }

        deletedEvent.setSequence(sequence);
        return deletedEvent;
    }

    @Override
    public Event removeEventById(AccessToken token, EventObmId eventId, EventType eventType, int sequence)
            throws SQLException, EventNotFoundException, ServerFault {
        Event event = null;
        Connection con = null;
        try {
            con = obmHelper.getConnection();
            event = removeEventById(con, token, eventId, eventType, sequence);
        } finally {
            obmHelper.cleanup(con, null, null);
        }

        return event;
    }

    // FIXME: event type should come from database
    @Override
    public Event removeEventById(Connection con, AccessToken token, EventObmId uid, EventType et, int sequence)
            throws SQLException, EventNotFoundException, ServerFault {

        Event ev = findEventById(token, uid);
        Event deleted = removeEvent(con, token, et, ev);
        deleted.setSequence(sequence);
        return deleted;
    }

    private Collection<Integer> extractAttendeeIds(Connection con, AccessToken token, Event event)
            throws SQLException {
        List<Attendee> attendees = event.getAttendees();
        Map<String, Integer> attendeesEmailToId = Maps.newHashMapWithExpectedSize(attendees.size());
        int domainId = token.getDomain().getId();
        for (Attendee attendee : event.getAttendees()) {
            addAttendeeIdMapping(con, domainId, attendeesEmailToId, attendee);
        }
        return attendeesEmailToId.values();
    }

    private void addAttendeeIdMapping(Connection con, int domainId, Map<String, Integer> attendeesEmailToId,
            Attendee attendee) throws SQLException {

        if (!attendeesEmailToId.containsKey(attendee.getEmail())) {
            Integer userId = userDao.userIdFromEmail(con, attendee.getEmail(), domainId);
            if (userId != null) {
                attendeesEmailToId.put(attendee.getEmail(), userId);
            }
        }
    }

    private void removeFromDeletedEvent(Connection con, Event ev, Collection<Integer> attendeeIds)
            throws SQLException {
        PreparedStatement deleteStatement = null;
        try {
            deleteStatement = con.prepareStatement(
                    "DELETE FROM DeletedEvent " + "WHERE deletedevent_event_ext_id=? AND deletedevent_user_id=?");
            String extId = ev.getExtId().getExtId();
            for (int attendeeId : attendeeIds) {
                deleteStatement.setString(1, extId);
                deleteStatement.setInt(2, attendeeId);
                deleteStatement.addBatch();
            }
            deleteStatement.executeBatch();
        } finally {
            obmHelper.cleanup(null, deleteStatement, null);
        }
    }

    private void insertIntoDeletedEvent(Connection con, AccessToken token, Event event, EventType eventType,
            Collection<Integer> attendeeIds) throws SQLException {
        PreparedStatement insertStatement = null;
        try {
            insertStatement = con
                    .prepareStatement("INSERT INTO DeletedEvent (deletedevent_event_id, deletedevent_user_id, "
                            + "deletedevent_origin, deletedevent_type, deletedevent_timestamp, deletedevent_event_ext_id) "
                            + "VALUES (?, ?, ?, ?, now(), ?)");
            EventObmId databaseId = event.getObmId();
            for (int attendeeId : attendeeIds) {
                insertStatement.setInt(1, databaseId.getObmId());
                insertStatement.setInt(2, attendeeId);
                insertStatement.setString(3, token.getOrigin());
                insertStatement.setObject(4,
                        obmHelper.getDBCP().getJdbcObject(ObmHelper.VCOMPONENT, eventType.toString()));
                insertStatement.setString(5, event.getExtId().getExtId());
                insertStatement.addBatch();
            }
            insertStatement.executeBatch();
        } finally {
            obmHelper.cleanup(null, insertStatement, null);
        }
    }

    private void removeFromEvent(Connection con, Event event) throws SQLException {
        PreparedStatement deleteStatement = null;
        try {
            deleteStatement = con.prepareStatement("DELETE FROM Event WHERE event_id=?");
            deleteStatement.setInt(1, event.getObmId().getObmId());
            deleteStatement.executeUpdate();
        } finally {
            obmHelper.cleanup(null, deleteStatement, null);
        }
    }

    private Event removeEvent(Connection con, AccessToken token, EventType eventType, Event event)
            throws SQLException {
        Preconditions.checkArgument(event.getRecurrenceId() == null,
                "Cannot remove an event exception via removeEvent()");

        Collection<Integer> attendeeIds = extractAttendeeIds(con, token, event);

        // Avoids potential duplicates
        removeFromDeletedEvent(con, event, attendeeIds);

        insertIntoDeletedEvent(con, token, event, eventType, attendeeIds);
        removeFromEvent(con, event);
        removeEventFromSolr(token, event);

        return event;
    }

    private void removeEventFromSolr(AccessToken token, Event ev) {
        try {
            solrHelperFactory.createClient(token).delete(ev);
        } catch (Throwable t) {
            logger.error("indexing error " + t.getMessage(), t);
        }
    }

    @VisibleForTesting
    void insertAttendees(AccessToken editor, Event ev, Connection con, List<Attendee> attendees)
            throws SQLException {
        String attQ = "INSERT INTO EventLink (" + ATT_INSERT_FIELDS + ") VALUES (" + "?, " + // event_id
                "?, " + // entity_id
                "?, " + // state
                "?, " + // required
                "?," + // percent
                "?," + // user_create
                "?" + // is_organizer
                ")";
        boolean shouldClearOrganizer = false;
        PreparedStatement ps = null;

        try {
            ps = con.prepareStatement(attQ);

            final int eventObmId = ev.getObmId().getObmId();
            final Set<Attendee> listAttendee = removeDuplicateAttendee(attendees);
            Set<EntityId> alreadyAddedAttendees = Sets.newHashSet();

            for (final Attendee at : listAttendee) {
                boolean isOrganizer = Objects.firstNonNull(at.isOrganizer(), false);

                String attendeeEmail = at.getEmail();
                EntityId userEntity = at.getEntityId();

                // There must be only one organizer in a given event
                if (isOrganizer) {
                    shouldClearOrganizer = true;
                }

                if (alreadyAddedAttendees.contains(userEntity)) {
                    logger.info("Attendee {} with entity ID {} already added, skipping.", attendeeEmail,
                            userEntity);

                    continue;
                }

                ps.setInt(1, eventObmId);
                ps.setInt(2, userEntity.getId());
                ps.setObject(3, getJdbcObjectParticipation(at));
                ps.setObject(4, getJdbcObjectParticipationRole(at));
                ps.setInt(5, at.getPercent());
                ps.setInt(6, editor.getObmId());
                ps.setBoolean(7, isOrganizer);
                ps.addBatch();
                logger.info(LogUtils.prefix(editor) + "Adding " + attendeeEmail
                        + (isOrganizer ? " as organizer" : " as attendee"));

                alreadyAddedAttendees.add(userEntity);
            }

            // Clear the previous organizer if needed
            if (shouldClearOrganizer) {
                clearOrganizer(eventObmId, con);
            }

            ps.executeBatch();
        } finally {
            obmHelper.cleanup(null, ps, null);
        }
    }

    private void clearOrganizer(int eventId, Connection con) throws SQLException {
        PreparedStatement ps = null;
        String query = "UPDATE EventLink SET eventlink_is_organizer = false WHERE eventlink_event_id = ?";

        try {
            ps = con.prepareStatement(query);

            ps.setInt(1, eventId);
            ps.executeUpdate();
        } finally {
            obmHelper.cleanup(null, ps, null);
        }
    }

    private Object getJdbcObjectParticipation(final Attendee at) throws SQLException {
        final Participation participation = RFC2445.getParticipationOrDefault(at.getParticipation());
        return obmHelper.getDBCP().getJdbcObject(ObmHelper.VPARTSTAT, participation.getState().toString());
    }

    private Object getJdbcObjectParticipationRole(final Attendee at) throws SQLException {
        final ParticipationRole pRole = RFC2445.getParticipationRoleOrDefault(at.getParticipationRole());
        return obmHelper.getDBCP().getJdbcObject(ObmHelper.VROLE, pRole.toString());
    }

    private Set<Attendee> removeDuplicateAttendee(List<Attendee> attendees) {
        return ImmutableSet.copyOf(attendees);
    }

    private void updateAttendees(AccessToken token, Connection con, Event event) throws SQLException {
        String q = "update EventLink set eventlink_state=?, eventlink_required=?, eventlink_userupdate=?, eventlink_percent=?, eventlink_is_organizer=? "
                + "where eventlink_event_id = ? AND eventlink_entity_id = ?";
        PreparedStatement ps = null;
        int[] updatedAttendees;
        List<Attendee> mightInsert = new LinkedList<Attendee>();
        List<Attendee> toInsert = new LinkedList<Attendee>();

        try {
            ps = con.prepareStatement(q);

            for (Attendee at : event.getAttendees()) {
                int idx = 1;

                ps.setObject(idx++, obmHelper.getDBCP().getJdbcObject(ObmHelper.VPARTSTAT,
                        at.getParticipation().getState().toString()));
                ps.setObject(idx++,
                        obmHelper.getDBCP().getJdbcObject(ObmHelper.VROLE, at.getParticipationRole().toString()));
                ps.setInt(idx++, token.getObmId());
                ps.setInt(idx++, at.getPercent());
                ps.setBoolean(idx++, at.isOrganizer());
                ps.setInt(idx++, event.getObmId().getObmId());
                ps.setInt(idx++, at.getEntityId().getId());
                ps.addBatch();
                mightInsert.add(at);
            }
            updatedAttendees = ps.executeBatch();
        } finally {
            obmHelper.cleanup(null, ps, null);
        }

        for (int i = 0; i < updatedAttendees.length; i++) {
            if (updatedAttendees[i] == 0) {
                Attendee at = mightInsert.get(i);
                toInsert.add(at);
            }
        }

        logger.info("event modification needs to add " + toInsert.size() + " attendees.");
        insertAttendees(token, event, con, toInsert);
    }

    private void updateAlerts(AccessToken token, Connection con, Event event, int ownerId) throws SQLException {
        deleteEventAlert(con, token, ownerId, event.getObmId());

        if (event.getAlert() != null) {
            insertEventAlert(con, token, ownerId, event);
        }
    }

    private void insertEventAlert(Connection con, AccessToken token, Integer ownerId, Event event)
            throws SQLException {

        int tokenId = token.getObmId();
        Integer alert = event.getAlert();
        int eventId = event.getObmId().getObmId();

        String insertAlertQuery = "INSERT INTO EventAlert "
                + "(eventalert_event_id, eventalert_user_id, eventalert_duration, eventalert_usercreate) "
                + "VALUES (?, ?, ?, ?)";

        if (tokenId != ownerId) {
            insertAlertQuery += ",(?, ?, ?, ?)";
        }

        PreparedStatement ps = null;

        try {
            ps = con.prepareStatement(insertAlertQuery);
            ps.setInt(1, eventId);
            ps.setInt(2, tokenId);
            ps.setInt(3, alert);
            ps.setInt(4, tokenId);
            if (tokenId != ownerId) {
                ps.setInt(5, eventId);
                ps.setInt(6, ownerId);
                ps.setInt(7, alert);
                ps.setInt(8, tokenId);
            }
            ps.executeUpdate();
        } finally {
            obmHelper.cleanup(null, ps, null);
        }
    }

    private void deleteEventAlert(Connection con, AccessToken token, Integer ownerId, EventObmId eventObmId)
            throws SQLException {
        IntegerSQLCollectionHelper userIds = new IntegerSQLCollectionHelper(
                Sets.newHashSet(ownerId, token.getObmId()));
        String deleteAlertQuery = "DELETE FROM EventAlert " + "WHERE eventalert_user_id in ("
                + userIds.asPlaceHolders() + ") " + "AND eventalert_event_id = ?";

        PreparedStatement ps = null;

        try {

            ps = con.prepareStatement(deleteAlertQuery);
            int nextId = userIds.insertValues(ps, 1);
            ps.setInt(nextId, eventObmId.getObmId());
            ps.executeUpdate();
        } finally {
            obmHelper.cleanup(null, ps, null);
        }
    }

    @Override
    public Event findEventByExtId(AccessToken token, ObmUser calendar, EventExtId extId) {
        String ev = "SELECT " + EVENT_SELECT_FIELDS + ", eventexception_date as recurrence_id " + " FROM Event e "
                + "LEFT JOIN EventCategory1 ON e.event_category1_id=eventcategory1_id "
                + "LEFT JOIN EventException ON e.event_id = eventexception_child_id "
                + "INNER JOIN Domain ON event_domain_id=domain_id "
                + "INNER JOIN EventEntity ON evententity_event_id=event_id "
                + "INNER JOIN EventLink link ON link.eventlink_event_id=e.event_id "
                + "INNER JOIN UserEntity ON userentity_entity_id=eventlink_entity_id "
                + "INNER JOIN UserObm u ON u.userobm_id=userentity_user_id "
                + "INNER JOIN UserObm o ON e.event_owner=o.userobm_id "
                + "INNER JOIN UserObm c ON e.event_usercreate=c.userobm_id " + "WHERE e.event_ext_id=? "
                + "AND u.userobm_login=? " + "AND eventexception_date IS NULL";

        PreparedStatement evps = null;
        ResultSet evrs = null;
        Connection con = null;

        try {
            con = obmHelper.getConnection();
            evps = con.prepareStatement(ev);
            evps.setString(1, extId.getExtId());
            evps.setString(2, calendar.getLogin());
            evrs = evps.executeQuery();
            if (evrs.next()) {
                Calendar cal = getGMTCalendar();
                Event ret = eventFromCursor(cal, evrs);
                String domainName = evrs.getString("domain_name");
                Map<EventObmId, Event> eventById = ImmutableMap.of(ret.getObmId(), ret);
                IntegerIndexedSQLCollectionHelper eventIds = new IntegerIndexedSQLCollectionHelper(
                        ImmutableList.of(ret));
                loadAttendees(con, eventById, domainName);
                loadAlerts(con, token, eventById, eventIds);
                loadExceptions(con, cal, eventById, eventIds);
                loadEventExceptions(con, token, eventById, eventIds);
                return ret;
            }
        } catch (SQLException e) {
            logger.error(e.getMessage(), e);
        } finally {
            obmHelper.cleanup(con, evps, evrs);
        }

        return null;
    }

    @Override
    public Event findEventByExtIdAndRecurrenceId(AccessToken token, ObmUser calendar, EventExtId extId,
            RecurrenceId recurrenceId) throws ParseException {

        String ev = "SELECT " + EVENT_SELECT_FIELDS + ", eventexception_date as recurrence_id " + " FROM Event e "
                + "LEFT JOIN EventCategory1 ON e.event_category1_id=eventcategory1_id "
                + "LEFT JOIN EventException eexp ON e.event_id = eventexception_child_id "
                + "INNER JOIN Domain ON event_domain_id=domain_id "
                + "INNER JOIN EventEntity ON evententity_event_id=event_id "
                + "INNER JOIN EventLink link ON link.eventlink_event_id=e.event_id "
                + "INNER JOIN UserEntity ON userentity_entity_id=eventlink_entity_id "
                + "INNER JOIN UserObm u ON u.userobm_id=userentity_user_id "
                + "INNER JOIN UserObm o ON e.event_owner=o.userobm_id "
                + "INNER JOIN UserObm c ON e.event_usercreate=c.userobm_id " + "WHERE e.event_ext_id=? "
                + "AND eexp.eventexception_date=?" + "AND u.userobm_login=?";

        PreparedStatement evps = null;
        ResultSet evrs = null;
        Connection con = null;

        try {
            con = obmHelper.getConnection();
            evps = con.prepareStatement(ev);
            evps.setString(1, extId.getExtId());

            Date recId = new DateTime(recurrenceId.getRecurrenceId());
            evps.setTimestamp(2, new Timestamp(recId.getTime()));
            evps.setString(3, calendar.getLogin());

            evrs = evps.executeQuery();
            if (evrs.next()) {
                Calendar cal = getGMTCalendar();
                Event ret = eventFromCursor(cal, evrs);
                String domainName = evrs.getString("domain_name");
                Map<EventObmId, Event> eventById = ImmutableMap.of(ret.getObmId(), ret);
                IntegerIndexedSQLCollectionHelper eventIds = new IntegerIndexedSQLCollectionHelper(
                        ImmutableList.of(ret));
                loadAttendees(con, eventById, domainName);
                loadAlerts(con, token, eventById, eventIds);
                return ret;
            }
        } catch (SQLException e) {
            logger.error(e.getMessage(), e);
        } catch (ParseException e) {
            logger.error(e.getMessage(), e);
            throw e;
        } finally {
            obmHelper.cleanup(con, evps, evrs);
        }
        return null;
    }

    @Override
    public List<Event> listEventsByIntervalDate(final AccessToken token, final ObmUser obmUser,
            final Date startDate, final Date endDate, final EventType typeFilter) {

        final String sql = "SELECT " + EVENT_SELECT_FIELDS + ", eventexception_date as recurrence_id "
                + " FROM Event e " + "INNER JOIN EventLink att ON att.eventlink_event_id=e.event_id "
                + "INNER JOIN UserEntity ue ON att.eventlink_entity_id=ue.userentity_entity_id "
                + "INNER JOIN EventEntity ON e.event_id=evententity_event_id "
                + "INNER JOIN UserObm o ON e.event_owner=o.userobm_id "
                + "INNER JOIN UserObm c ON e.event_usercreate=c.userobm_id "
                + "INNER JOIN Domain ON e.event_domain_id=domain_id "
                + "LEFT JOIN EventCategory1 ON e.event_category1_id=eventcategory1_id "
                + "LEFT JOIN EventException ON e.event_id = eventexception_child_id "
                + "WHERE e.event_type=? AND ue.userentity_user_id=? "
                + "AND ((event_repeatkind != 'none' AND event_endrepeat <= ?) OR "
                + "(event_repeatkind = 'none' AND event_date >= ? AND event_date <= ?) )";

        PreparedStatement evps = null;
        ResultSet evrs = null;
        Connection con = null;

        final List<Event> changedEvent = new LinkedList<Event>();
        final Map<EventObmId, Event> eventById = new HashMap<EventObmId, Event>();
        final List<Event> ret = new LinkedList<Event>();
        final Calendar cal = getGMTCalendar();

        try {
            con = obmHelper.getConnection();
            evps = con.prepareStatement(sql);
            int idx = 1;
            evps.setObject(idx++, obmHelper.getDBCP().getJdbcObject(ObmHelper.VCOMPONENT, typeFilter.toString()));
            evps.setObject(idx++, obmUser.getUid());
            evps.setTimestamp(idx++, new Timestamp(endDate.getTime()));
            evps.setTimestamp(idx++, new Timestamp(startDate.getTime()));
            evps.setTimestamp(idx++, new Timestamp(endDate.getTime()));
            evrs = evps.executeQuery();
            while (evrs.next()) {
                Event event = eventFromCursor(cal, evrs);
                Set<Date> extDate = getAllDateEventException(con, event.getObmId());
                Date recurDate = ical4jHelper.isInIntervalDate(event, startDate, endDate, extDate);
                if (recurDate != null) {
                    eventById.put(event.getObmId(), event);
                    changedEvent.add(event);
                    ret.add(event);
                }
            }

            IntegerIndexedSQLCollectionHelper changedIds = new IntegerIndexedSQLCollectionHelper(changedEvent);
            loadAttendees(con, eventById, obmUser.getDomain().getName());
            loadAlerts(con, token, eventById, changedIds);
            loadExceptions(con, cal, eventById, changedIds);
            loadEventExceptions(con, token, eventById, changedIds);

        } catch (SQLException e) {
            logger.error(e.getMessage(), e);
        } finally {
            obmHelper.cleanup(con, evps, evrs);
        }

        return ret;
    }

    @Override
    public List<Event> findAllEvents(AccessToken token, ObmUser calendarUser, EventType typeFilter) {
        String ev = "SELECT " + EVENT_SELECT_FIELDS + ", eventexception_date as recurrence_id " + " FROM Event e "
                + "INNER JOIN EventLink att ON att.eventlink_event_id=e.event_id "
                + "INNER JOIN UserEntity ue ON att.eventlink_entity_id=ue.userentity_entity_id "
                + "INNER JOIN EventEntity ON e.event_id=evententity_event_id "
                + "INNER JOIN UserObm o ON e.event_owner=o.userobm_id "
                + "INNER JOIN UserObm c ON e.event_usercreate=c.userobm_id "
                + "INNER JOIN Domain ON e.event_domain_id=domain_id "
                + "LEFT JOIN EventCategory1 ON e.event_category1_id=eventcategory1_id "
                + "LEFT JOIN EventException ON e.event_id = eventexception_child_id "
                + "WHERE ue.userentity_user_id=? and e.event_type=? ";

        StringBuilder sb = new StringBuilder(ev);

        PreparedStatement evps = null;
        ResultSet evrs = null;
        Connection con = null;

        Map<EventObmId, Event> eventById = new HashMap<EventObmId, Event>();
        List<Event> ret = new LinkedList<Event>();
        Calendar cal = getGMTCalendar();
        try {
            con = obmHelper.getConnection();
            evps = con.prepareStatement(sb.toString());
            int idx = 1;
            evps.setObject(idx++, calendarUser.getUid());
            evps.setObject(idx++, obmHelper.getDBCP().getJdbcObject(ObmHelper.VCOMPONENT, typeFilter.toString()));
            evrs = evps.executeQuery();

            while (evrs.next()) {
                Event event = eventFromCursor(cal, evrs);
                eventById.put(event.getObmId(), event);
                ret.add(event);
            }

            IntegerIndexedSQLCollectionHelper eventIds = new IntegerIndexedSQLCollectionHelper(ret);
            loadAttendees(con, eventById, calendarUser.getDomain().getName());
            loadAlerts(con, token, eventById, eventIds);
            loadExceptions(con, cal, eventById, eventIds);
            loadEventExceptions(con, token, eventById, eventIds);

        } catch (SQLException e) {
            logger.error(e.getMessage(), e);
        } finally {
            obmHelper.cleanup(con, evps, evrs);
        }

        return ret;
    }

    private Calendar getGMTCalendar() {
        return Calendar.getInstance(TimeZone.getTimeZone("GMT"));
    }

    @Override
    public Date findLastUpdate(AccessToken token, String calendar) {
        String ev = "SELECT MAX(event_timeupdate), MAX(event_timecreate) " + " FROM Event e "
                + "INNER JOIN UserObm ON e.event_owner=userobm_id " + "WHERE userobm_login=?";

        PreparedStatement evps = null;
        ResultSet evrs = null;
        Connection con = null;

        Date lastUpdate = null;
        Date lastCreate = null;
        try {
            con = obmHelper.getConnection();
            evps = con.prepareStatement(ev);
            evps.setString(1, calendar);
            evrs = evps.executeQuery();
            if (evrs.next()) {
                lastUpdate = JDBCUtils.getDate(evrs, evrs.getMetaData().getColumnName(1));
                lastCreate = JDBCUtils.getDate(evrs, evrs.getMetaData().getColumnName(2));
            }
        } catch (SQLException e) {
            logger.error(e.getMessage(), e);
        } finally {
            obmHelper.cleanup(con, evps, evrs);
        }

        if (lastCreate == null && lastUpdate == null) {
            return new Date(0);
        }

        if (lastUpdate != null && lastUpdate.after(lastCreate)) {
            return lastUpdate;
        }
        return lastCreate;
    }

    private EventRecurrence eventRecurrenceFromCursor(Calendar cal, ResultSet evrs) throws SQLException {
        EventRecurrence er = new EventRecurrence();
        er.setKind(RecurrenceKind.valueOf(evrs.getString("event_repeatkind")));
        er.setDays(new RecurrenceDaysParser().parse(evrs.getString("event_repeatdays")));
        er.setFrequence(evrs.getInt("event_repeatfrequence"));
        Timestamp endRepeat = evrs.getTimestamp("event_endrepeat");
        if (endRepeat != null) {
            cal.setTimeInMillis(endRepeat.getTime());
            er.setEnd(cal.getTime());
        }
        return er;
    }

    @Override
    public Event removeEventByExtId(AccessToken token, ObmUser calendar, EventExtId extId, int sequence)
            throws SQLException {
        Connection con = null;
        try {
            con = obmHelper.getConnection();
            Event event = removeEventByExtId(con, calendar, token, extId);
            event.setSequence(sequence);
            return event;
        } finally {
            obmHelper.cleanup(con, null, null);
        }
    }

    private Event removeEventByExtId(Connection con, ObmUser calendar, AccessToken token, EventExtId extId) {
        Event ev = findEventByExtId(token, calendar, extId);
        if (ev == null) {
            return null;
        }
        PreparedStatement dev = null;
        try {
            dev = con.prepareStatement(
                    "INSERT INTO DeletedEvent (deletedevent_event_id, deletedevent_user_id, deletedevent_origin, deletedevent_timestamp, deletedevent_event_ext_id) "
                            + "VALUES (?, ?, ?, now(), ?)");
            EventObmId databaseId = ev.getObmId();
            for (Attendee at : ev.getAttendees()) {
                Integer userId = userDao.userIdFromEmail(con, at.getEmail(), token.getDomain().getId());
                if (userId != null) {
                    dev.setInt(1, databaseId.getObmId());
                    dev.setInt(2, userId);
                    dev.setString(3, token.getOrigin());
                    dev.setString(4, extId.getExtId());
                    dev.addBatch();
                }
            }
            dev.executeBatch();
            dev.close();

            removeEventExceptions(con, databaseId);

            dev = con.prepareStatement("DELETE FROM Event WHERE event_id=?");
            dev.setInt(1, databaseId.getObmId());
            dev.executeUpdate();

        } catch (Throwable se) {
            logger.error(se.getMessage(), se);
        } finally {
            obmHelper.cleanup(null, dev, null);
        }

        return ev;
    }

    @Override
    public boolean changeParticipation(AccessToken token, ObmUser calendar, EventExtId extId,
            Participation participation) throws SQLException {

        Connection con = null;
        try {
            con = obmHelper.getConnection();
            return changeParticipation(con, token, extId, calendar, participation);
        } finally {
            obmHelper.cleanup(con, null, null);
        }
    }

    private boolean changeParticipation(Connection con, AccessToken token, EventExtId extId, ObmUser calendarOwner,
            Participation participation) throws SQLException {

        PreparedStatement ps = null;

        String q = "UPDATE EventLink " + "SET eventlink_state = ?, eventlink_userupdate = ?, eventlink_comment = ? "
                + "WHERE eventlink_event_id IN " + "( SELECT event_id FROM Event WHERE event_ext_id = ? ) AND "
                + "eventlink_entity_id IN "
                + "( SELECT userentity_entity_id FROM UserEntity WHERE userentity_user_id = ? )";

        Integer loggedUserId = token.getObmId();

        try {
            ps = con.prepareStatement(q);

            int idx = 1;
            ps.setObject(idx++,
                    obmHelper.getDBCP().getJdbcObject(ObmHelper.VPARTSTAT, participation.getState().toString()));
            ps.setInt(idx++, loggedUserId);
            ps.setString(idx++, participation.getSerializedCommentToString());
            ps.setString(idx++, extId.getExtId());
            ps.setInt(idx++, calendarOwner.getUid());
            ps.execute();
            if (ps.getUpdateCount() > 0) {
                return true;
            }
        } catch (SQLException e) {
            logger.error(e.getMessage(), e);
            throw e;
        } finally {
            obmHelper.cleanup(null, ps, null);
        }
        return false;
    }

    @Override
    public boolean changeParticipation(AccessToken token, ObmUser calendar, EventExtId extId,
            RecurrenceId recurrenceId, Participation participation) throws SQLException, ParseException {

        Connection con = null;
        try {
            con = obmHelper.getConnection();
            return changeParticipation(con, token, extId, recurrenceId, calendar, participation);
        } finally {
            obmHelper.cleanup(con, null, null);
        }
    }

    private boolean changeParticipation(Connection con, AccessToken token, EventExtId extId,
            RecurrenceId recurrenceId, ObmUser calendarOwner, Participation participation)
            throws SQLException, ParseException {

        PreparedStatement ps = null;

        String q = "UPDATE EventLink " + "SET eventlink_state = ?, eventlink_userupdate = ?, eventlink_comment = ? "
                + "WHERE eventlink_event_id IN " + "(" + "SELECT event_id " + "FROM Event e "
                + "LEFT JOIN EventException eexp ON e.event_id = eventexception_child_id "
                + "WHERE event_ext_id = ? " + "AND eexp.eventexception_date = ?" + ") AND "
                + "eventlink_entity_id IN "
                + "( SELECT userentity_entity_id FROM UserEntity WHERE userentity_user_id = ? )";

        Integer loggedUserId = token.getObmId();

        try {
            ps = con.prepareStatement(q);

            int idx = 1;
            ps.setObject(idx++,
                    obmHelper.getDBCP().getJdbcObject(ObmHelper.VPARTSTAT, participation.getState().toString()));
            ps.setInt(idx++, loggedUserId);
            ps.setString(idx++, participation.getSerializedCommentToString());
            ps.setString(idx++, extId.getExtId());
            Date recId = new DateTime(recurrenceId.getRecurrenceId());
            ps.setTimestamp(idx++, new Timestamp(recId.getTime()));
            ps.setInt(idx++, calendarOwner.getUid());
            ps.execute();
            if (ps.getUpdateCount() > 0) {
                return true;
            }
        } catch (SQLException e) {
            logger.error(e.getMessage(), e);
            throw e;
        } catch (ParseException e) {
            logger.error(e.getMessage(), e);
            throw e;
        } finally {
            obmHelper.cleanup(null, ps, null);
        }
        return false;
    }

}