/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.apache.storm.jms.trident;
import org.apache.storm.jms.JmsMessageProducer;
import org.apache.storm.jms.JmsProvider;
import org.apache.storm.topology.FailedException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.storm.trident.operation.TridentCollector;
import org.apache.storm.trident.state.State;
import org.apache.storm.trident.tuple.TridentTuple;
import javax.jms.*;
import java.io.Serializable;
import java.lang.IllegalStateException;
import java.util.List;
public class JmsState implements State {
private static final Logger LOG = LoggerFactory.getLogger(JmsState.class);
private Options options;
private Connection connection;
private Session session;
private MessageProducer messageProducer;
protected JmsState(Options options) {
this.options = options;
}
public static class Options implements Serializable {
private JmsProvider jmsProvider;
private JmsMessageProducer msgProducer;
private int jmsAcknowledgeMode = Session.AUTO_ACKNOWLEDGE;
private boolean jmsTransactional = true;
public Options withJmsProvider(JmsProvider provider) {
this.jmsProvider = provider;
return this;
}
public Options withMessageProducer(JmsMessageProducer msgProducer) {
this.msgProducer = msgProducer;
return this;
}
public Options withJmsAcknowledgeMode(int jmsAcknowledgeMode) {
this.jmsAcknowledgeMode = jmsAcknowledgeMode;
return this;
}
public Options withJmsTransactional(boolean jmsTransactional) {
this.jmsTransactional = jmsTransactional;
return this;
}
}
protected void prepare() {
if(this.options.jmsProvider == null || this.options.msgProducer == null){
throw new IllegalStateException("JMS Provider and MessageProducer not set.");
}
LOG.debug("Connecting JMS..");
try {
ConnectionFactory cf = this.options.jmsProvider.connectionFactory();
Destination dest = this.options.jmsProvider.destination();
this.connection = cf.createConnection();
this.session = connection.createSession(this.options.jmsTransactional,
this.options.jmsAcknowledgeMode);
this.messageProducer = session.createProducer(dest);
connection.start();
} catch (Exception e) {
LOG.warn("Error creating JMS connection.", e);
}
}
@Override
public void beginCommit(Long aLong) {
}
@Override
public void commit(Long aLong) {
LOG.debug("Committing JMS transaction.");
if(this.options.jmsTransactional) {
try {
session.commit();
} catch(JMSException e){
LOG.error("JMS Session commit failed.", e);
}
}
}
public void updateState(List<TridentTuple> tuples, TridentCollector collector) throws JMSException {
try {
for(TridentTuple tuple : tuples) {
Message msg = this.options.msgProducer.toMessage(this.session, tuple);
if (msg != null) {
if (msg.getJMSDestination() != null) {
this.messageProducer.send(msg.getJMSDestination(), msg);
} else {
this.messageProducer.send(msg);
}
}
}
} catch (JMSException e) {
LOG.warn("Failed to send jmd message for a trident batch ", e);
if(this.options.jmsTransactional) {
session.rollback();
}
throw new FailedException("Failed to write tuples", e);
}
}
}