Java tutorial
// --------------------------------------------------------------------------- // jWebSocket - MongoDBConsumerAdviceTempStorage (Community Edition, CE) // --------------------------------------------------------------------------- // Copyright 2010-2015 Innotrade GmbH (jWebSocket.org) // Alexander Schulze, Germany (NRW) // // 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. // --------------------------------------------------------------------------- package org.jwebsocket.jms.mongodb; import com.mongodb.BasicDBObject; import com.mongodb.DBCollection; import com.mongodb.DBObject; import java.util.Map; import org.jwebsocket.api.IInitializable; import org.jwebsocket.jms.Attributes; import org.jwebsocket.jms.api.IConsumerAdviceTempStorage; import org.springframework.util.Assert; /** * MongoDB based implementation for IConsumerAdviceTempStorage interface. * * @author Rolando Santamaria Maso */ public class MongoDBConsumerAdviceTempStorage implements IConsumerAdviceTempStorage, IInitializable { private DBCollection mCollection; @Override public String getConsumerId(String aCorrelationId) throws Exception { DBObject lRecord = mCollection .findOne(new BasicDBObject().append(Attributes.CORRELATION_ID, aCorrelationId)); if (null == lRecord) { return null; } mCollection.remove(lRecord); return lRecord.get(Attributes.CONSUMER_ID).toString(); } @Override public Map<String, String> getData(String aCorrelationId) throws Exception { DBObject lRecord = mCollection .findOne(new BasicDBObject().append(Attributes.CORRELATION_ID, aCorrelationId)); if (null == lRecord) { return null; } mCollection.remove(lRecord); return lRecord.toMap(); } /** * * @return */ public DBCollection getCollection() { return mCollection; } /** * * @param aCollection */ public void setCollection(DBCollection aCollection) { mCollection = aCollection; } @Override public void initialize() throws Exception { Assert.notNull(mCollection, "The 'collection' argument cannot be null!"); mCollection.createIndex( new BasicDBObject().append(Attributes.CORRELATION_ID, 1).append(Attributes.CONSUMER_ID, 1), new BasicDBObject().append("unique", true)); if (!mCollection.isCapped()) { // converting collection to capped (limiting collection size) mCollection.getDB().command( new BasicDBObject().append("convertToCapped", mCollection.getName()).append("max", 1000000)); } } @Override public void shutdown() throws Exception { } }