Java tutorial
/** * Licensed to the Sakai Foundation (SF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The SF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations under the License. */ package org.sakaiproject.nakamura.connections.search; import com.google.common.collect.ImmutableList; import com.google.common.collect.ImmutableMap; import com.google.common.collect.ImmutableSet; import com.google.common.collect.Lists; import com.google.common.collect.Sets; import org.apache.commons.lang.StringUtils; import org.apache.felix.scr.annotations.Activate; import org.apache.felix.scr.annotations.Component; import org.apache.felix.scr.annotations.Deactivate; import org.apache.felix.scr.annotations.Reference; import org.apache.solr.client.solrj.util.ClientUtils; import org.apache.solr.common.SolrInputDocument; import org.osgi.service.event.Event; import org.sakaiproject.nakamura.api.connections.ConnectionConstants; import org.sakaiproject.nakamura.api.lite.Session; import org.sakaiproject.nakamura.api.lite.StorageClientException; import org.sakaiproject.nakamura.api.lite.accesscontrol.AccessDeniedException; import org.sakaiproject.nakamura.api.lite.authorizable.Authorizable; import org.sakaiproject.nakamura.api.lite.authorizable.AuthorizableManager; import org.sakaiproject.nakamura.api.lite.content.Content; import org.sakaiproject.nakamura.api.lite.content.ContentManager; import org.sakaiproject.nakamura.api.solr.IndexingHandler; import org.sakaiproject.nakamura.api.solr.QoSIndexHandler; import org.sakaiproject.nakamura.api.solr.RepositorySession; import org.sakaiproject.nakamura.api.solr.ResourceIndexingService; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Collection; import java.util.Collections; import java.util.List; import java.util.Map; import java.util.Map.Entry; import java.util.Set; /** * <p>Indexing handler for contact connections between two users.</p> * <p>The fields that are indexed are:<br/> * <ul> * <li>connection status: state</li> * <li>contact's username: name</li> * <li>contact's first name: firstName</li> * <li>contact's last name: lastName</li> * <li>contact's email: email</li> * </ul> */ @Component(immediate = true) public class ConnectionIndexingHandler implements IndexingHandler, QoSIndexHandler { private static final Logger logger = LoggerFactory.getLogger(ConnectionIndexingHandler.class); private static final Map<String, String> WHITELISTED_PROPS = ImmutableMap.of("sakai:contactstorepath", "contactstorepath", "sakai:state", "state"); private static final Set<String> FLATTENED_PROPS = ImmutableSet.of("name", "firstName", "lastName", "email"); private static final Set<String> CONTENT_TYPES = Sets.newHashSet(ConnectionConstants.SAKAI_CONTACT_RT); @Reference(target = "(type=sparse)") private ResourceIndexingService resourceIndexingService; @Activate public void activate(Map<String, Object> properties) throws Exception { for (String type : CONTENT_TYPES) { resourceIndexingService.addHandler(type, this); } } @Deactivate public void deactivate(Map<String, Object> properties) { for (String type : CONTENT_TYPES) { resourceIndexingService.removeHandler(type, this); } } /** * {@inheritDoc} * * @see org.sakaiproject.nakamura.api.solr.QoSIndexHandler#getTtl(org.osgi.service.event.Event) */ public int getTtl(Event event) { // have to be > 0 based on the logic in ContentEventListener. // see org.sakaiproject.nakamura.solr.Utils.defaultMax(int) return 50; } /** * {@inheritDoc} * * @see org.sakaiproject.nakamura.api.solr.IndexingHandler#getDocuments(org.sakaiproject.nakamura.api.solr.RepositorySession, org.osgi.service.event.Event) */ public Collection<SolrInputDocument> getDocuments(RepositorySession repoSession, Event event) { String path = (String) event.getProperty(IndexingHandler.FIELD_PATH); logger.info("Indexing connections at path {}", path); List<SolrInputDocument> documents = Lists.newArrayList(); if (!StringUtils.isBlank(path)) { try { Session session = repoSession.adaptTo(Session.class); ContentManager cm = session.getContentManager(); Content content = cm.get(path); int lastSlash = path.lastIndexOf('/'); String contactName = path.substring(lastSlash + 1); AuthorizableManager am = session.getAuthorizableManager(); Authorizable contactAuth = am.findAuthorizable(contactName); if (content != null && contactAuth != null) { if (!CONTENT_TYPES.contains(content.getProperty("sling:resourceType"))) { return documents; } SolrInputDocument doc = new SolrInputDocument(); for (Entry<String, String> prop : WHITELISTED_PROPS.entrySet()) { String key = prop.getKey(); Object value = content.getProperty(key); if (value != null) { doc.addField(WHITELISTED_PROPS.get(key), value); } } // flatten out the contact so we can search it Map<String, Object> contactProps = contactAuth.getSafeProperties(); if (contactAuth != null) { for (String prop : FLATTENED_PROPS) { Object value = contactProps.get(prop); if (value != null) { doc.addField(prop, value); } } } doc.addField(IndexingHandler._DOC_SOURCE_OBJECT, content); documents.add(doc); } else { logger.debug("Did not index {}: Content == {}; Contact Auth == {}", new Object[] { path, content, contactAuth }); } } catch (StorageClientException e) { logger.error(e.getMessage(), e); } catch (AccessDeniedException e) { logger.error(e.getMessage(), e); } } logger.debug("Got documents {} ", documents); return documents; } /** * {@inheritDoc} * * @see org.sakaiproject.nakamura.api.solr.IndexingHandler#getDeleteQueries(org.sakaiproject.nakamura.api.solr.RepositorySession, * org.osgi.service.event.Event) */ public Collection<String> getDeleteQueries(RepositorySession repositorySession, Event event) { List<String> retval = Collections.emptyList(); logger.debug("GetDelete for {} ", event); String path = (String) event.getProperty(IndexingHandler.FIELD_PATH); String resourceType = (String) event.getProperty("resourceType"); if (CONTENT_TYPES.contains(resourceType)) { retval = ImmutableList.of("id:" + ClientUtils.escapeQueryChars(path)); } return retval; } }