/*
* Copyright 2002-2014 the original author or authors.
*
* 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.springframework.xd.dirt.stream;
import static org.springframework.xd.dirt.stream.ParsingContext.job;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.support.MessageBuilder;
import org.springframework.messaging.MessageChannel;
import org.springframework.util.Assert;
import org.springframework.xd.dirt.integration.bus.MessageBus;
import org.springframework.xd.dirt.zookeeper.Paths;
import org.springframework.xd.dirt.zookeeper.ZooKeeperConnection;
import org.springframework.xd.module.ModuleDescriptor;
/**
* @author Glenn Renfro
* @author Luke Taylor
* @author Ilayaperumal Gopinathan
* @author Gunnar Hillert
*/
public class JobDeployer extends AbstractInstancePersistingDeployer<JobDefinition, Job> implements DisposableBean {
private final String JOB_CHANNEL_PREFIX = "job:";
private final MessageBus messageBus;
private final ConcurrentMap<String, MessageChannel> jobChannels = new ConcurrentHashMap<String, MessageChannel>();
public JobDeployer(ZooKeeperConnection zkConnection, JobDefinitionRepository definitionRepository,
JobRepository instanceRepository,
XDParser parser, MessageBus messageBus) {
super(zkConnection, definitionRepository, instanceRepository, parser, job);
Assert.notNull(messageBus, "MessageBus must not be null");
this.messageBus = messageBus;
}
@Override
protected Job makeInstance(JobDefinition definition) {
return new Job(definition);
}
public void launch(String name, String jobParameters) {
MessageChannel channel = jobChannels.get(name);
if (channel == null) {
jobChannels.putIfAbsent(name, new DirectChannel());
channel = jobChannels.get(name);
messageBus.bindProducer(JOB_CHANNEL_PREFIX + name, channel, null);
}
// Double check so that user gets an informative error message
JobDefinition job = getDefinitionRepository().findOne(name);
if (job == null) {
throwNoSuchDefinitionException(name);
}
if (instanceRepository.findOne(name) == null) {
throwNotDeployedException(name);
}
// todo: is this Assert necessary? if not we can remove the parser dependency and parse method
Assert.isTrue(parse(name, job.getDefinition()).size() == 1, "Expecting only a single module");
channel.send(MessageBuilder.withPayload(jobParameters != null ? jobParameters : "").build());
}
@Override
protected JobDefinition createDefinition(String name, String definition) {
return new JobDefinition(name, definition);
}
@Override
protected String getDeploymentPath(JobDefinition definition) {
return Paths.build(Paths.JOB_DEPLOYMENTS, definition.getName());
}
private List<ModuleDescriptor> parse(String name, String definition) {
return parser.parse(name, definition, definitionKind);
}
@Override
public void destroy() throws Exception {
for (Map.Entry<String, MessageChannel> entry : jobChannels.entrySet()) {
messageBus.unbindProducer(JOB_CHANNEL_PREFIX + entry.getKey(), entry.getValue());
}
}
}