Java tutorial
/* * Copyright 2015 Institute of Information Systems, Hof University * * Licensed 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. * under the License. */ package org.apache.shindig.social.websockbackend.spi; import java.util.ArrayList; import java.util.List; import java.util.Map; import java.util.Set; import java.util.concurrent.Future; import java.util.logging.Level; import java.util.logging.Logger; import javax.servlet.http.HttpServletResponse; import org.apache.shindig.auth.SecurityToken; import org.apache.shindig.protocol.DataCollection; import org.apache.shindig.protocol.ProtocolException; import org.apache.shindig.social.opensocial.spi.AppDataService; import org.apache.shindig.social.opensocial.spi.GroupId; import org.apache.shindig.social.opensocial.spi.UserId; import com.google.common.util.concurrent.Futures; import com.google.inject.Inject; import com.google.inject.Singleton; import de.hofuniversity.iisys.neo4j.websock.queries.IQueryCallback; import de.hofuniversity.iisys.neo4j.websock.queries.IQueryHandler; import de.hofuniversity.iisys.neo4j.websock.query.EQueryType; import de.hofuniversity.iisys.neo4j.websock.query.WebsockQuery; import de.hofuniversity.iisys.neo4j.websock.result.SingleResult; import de.hofuniversity.iisys.neo4j.websock.shindig.ShindigNativeQueries; /** * Implementation of the ActivityService interface retrieving application data from a remote Neo4j * graph database over a websocket. */ @Singleton public class WsNativeAppDataSPI implements AppDataService { private final IQueryHandler fQueryHandler; private final Logger fLogger; /** * Creates a graph application data service using the given query handler to dispatch queries to a * remote server. Throws a NullPointerException if a parameter is null. * * @param qHandler * query handler to use */ @Inject public WsNativeAppDataSPI(IQueryHandler qHandler) { if (qHandler == null) { throw new NullPointerException("query handler was null"); } this.fQueryHandler = qHandler; this.fLogger = Logger.getLogger(this.getClass().getName()); } @Override public Future<DataCollection> getPersonData(Set<UserId> userIds, GroupId groupId, String appId, Set<String> fields, SecurityToken token) throws ProtocolException { String group = null; if (groupId != null) { // actual group if (groupId.getType() == GroupId.Type.objectId) { group = groupId.getObjectId().toString(); } // group type else { group = '@' + groupId.getType().toString(); } } // create query final WebsockQuery query = new WebsockQuery(EQueryType.PROCEDURE_CALL); query.setPayload(ShindigNativeQueries.GET_APP_DATA_QUERY); // set parameters for method final List<String> idList = new ArrayList<String>(); for (final UserId userId : userIds) { idList.add(userId.getUserId(token)); } query.setParameter(ShindigNativeQueries.USER_ID_LIST, idList); query.setParameter(ShindigNativeQueries.GROUP_ID, group); query.setParameter(ShindigNativeQueries.APP_ID, appId); if (fields != null) { final List<String> fieldList = new ArrayList<String>(fields); query.setParameter(ShindigNativeQueries.FIELD_LIST, fieldList); } // execute and convert result final IQueryCallback callback = this.fQueryHandler.sendQuery(query); SingleResult result = null; try { result = (SingleResult) callback.get(); } catch (final Exception e) { e.printStackTrace(); this.fLogger.log(Level.SEVERE, "server error", e); throw new ProtocolException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "could not retrieve result", e); } @SuppressWarnings("unchecked") final DataCollection dataColl = new DataCollection((Map<String, Map<String, Object>>) result.getResults()); return Futures.immediateFuture(dataColl); } @Override public Future<Void> deletePersonData(UserId userId, GroupId groupId, String appId, Set<String> fields, SecurityToken token) throws ProtocolException { String group = null; if (groupId != null) { // actual group if (groupId.getType() == GroupId.Type.objectId) { group = groupId.getObjectId().toString(); } // group type else { group = '@' + groupId.getType().toString(); } } // create query final WebsockQuery query = new WebsockQuery(EQueryType.PROCEDURE_CALL); query.setPayload(ShindigNativeQueries.DELETE_APP_DATA_QUERY); // set parameters for method query.setParameter(ShindigNativeQueries.USER_ID, userId.getUserId(token)); query.setParameter(ShindigNativeQueries.GROUP_ID, group); query.setParameter(ShindigNativeQueries.APP_ID, appId); if (fields != null) { final List<String> fieldList = new ArrayList<String>(fields); query.setParameter(ShindigNativeQueries.FIELD_LIST, fieldList); } // execute query try { this.fQueryHandler.sendQuery(query).get(); } catch (final Exception e) { e.printStackTrace(); this.fLogger.log(Level.SEVERE, "server error", e); throw new ProtocolException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "could not delete application data", e); } return Futures.immediateFuture(null); } @Override public Future<Void> updatePersonData(UserId userId, GroupId groupId, String appId, Set<String> fields, Map<String, Object> values, SecurityToken token) throws ProtocolException { String group = null; if (groupId != null) { // actual group if (groupId.getType() == GroupId.Type.objectId) { group = groupId.getObjectId().toString(); } // group type else { group = '@' + groupId.getType().toString(); } } // create query final WebsockQuery query = new WebsockQuery(EQueryType.PROCEDURE_CALL); query.setPayload(ShindigNativeQueries.UPDATE_APP_DATA_QUERY); // set parameters for method query.setParameter(ShindigNativeQueries.USER_ID, userId.getUserId(token)); query.setParameter(ShindigNativeQueries.GROUP_ID, group); query.setParameter(ShindigNativeQueries.APP_ID, appId); query.setParameter(ShindigNativeQueries.APP_DATA, values); // execute query try { this.fQueryHandler.sendQuery(query).get(); } catch (final Exception e) { e.printStackTrace(); this.fLogger.log(Level.SEVERE, "server error", e); throw new ProtocolException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "could not delete application data", e); } return Futures.immediateFuture(null); } }