com.eucalyptus.reporting.domain.ReportingUserDao.java Source code

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Here is the source code for com.eucalyptus.reporting.domain.ReportingUserDao.java

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/*************************************************************************
 * Copyright 2009-2012 Eucalyptus Systems, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3 of the License.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/.
 *
 * Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
 * CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
 * additional information or have any questions.
 ************************************************************************/
package com.eucalyptus.reporting.domain;

import java.util.List;

import javax.persistence.EntityTransaction;

import org.apache.log4j.Logger;

import com.eucalyptus.entities.Entities;
import com.google.common.base.Predicates;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;

/**
 * <p>
 * ReportingUserDao is an object for reading ReportingUser objects from the
 * database.
 */
public class ReportingUserDao {
    private static Logger LOG = Logger.getLogger(ReportingUserDao.class);

    private static ReportingUserDao instance = null;

    public static ReportingUserDao getInstance() {
        if (instance == null) {
            instance = new ReportingUserDao();
        }
        return instance;
    }

    private ReportingUserDao() {
    }

    public ReportingUser getReportingUser(String userId) {
        ReportingUser searchUser = new ReportingUser();
        searchUser.setId(userId);
        try {
            return searchReportingUser(searchUser).get(0);
        } catch (Exception ex) {
            LOG.debug(ex, ex);
            return null;
        }
    }

    public List<ReportingUser> getReportingUsersByAccount(String accountId) {
        ReportingUser searchUser = new ReportingUser();
        searchUser.setAccountId(accountId);
        return searchReportingUser(searchUser);
    }

    private List<ReportingUser> searchReportingUser(final ReportingUser searchUser) {

        List<ReportingUser> reportingUserList = Lists.newArrayList();
        EntityTransaction db = Entities.get(ReportingUser.class);

        try {
            reportingUserList = (List<ReportingUser>) Entities.query(searchUser, true);
            db.commit();
        } catch (Exception ex) {
            LOG.error(ex, ex);
            reportingUserList.clear();
        } finally {
            if (db.isActive())
                db.rollback();
        }

        Iterables.removeIf(reportingUserList, Predicates.isNull());
        if (!reportingUserList.isEmpty()) {
            return reportingUserList;
        } else {
            return null;
        }
    }
}