/*
* Copyright © 2014 Cask Data, Inc.
*
* 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 co.cask.cdap.internal.app.runtime.distributed;
import co.cask.cdap.api.flow.FlowSpecification;
import co.cask.cdap.app.ApplicationSpecification;
import co.cask.cdap.app.program.Program;
import co.cask.cdap.app.runtime.ProgramController;
import co.cask.cdap.app.runtime.ProgramOptions;
import co.cask.cdap.common.conf.CConfiguration;
import co.cask.cdap.common.conf.Constants;
import co.cask.cdap.common.queue.QueueName;
import co.cask.cdap.common.twill.AbortOnTimeoutEventHandler;
import co.cask.cdap.data2.transaction.queue.QueueAdmin;
import co.cask.cdap.data2.transaction.stream.StreamAdmin;
import co.cask.cdap.internal.app.runtime.flow.FlowUtils;
import co.cask.cdap.proto.ProgramType;
import com.google.common.base.Preconditions;
import com.google.common.base.Throwables;
import com.google.common.collect.Multimap;
import com.google.inject.Inject;
import org.apache.hadoop.conf.Configuration;
import org.apache.twill.api.EventHandler;
import org.apache.twill.api.TwillController;
import org.apache.twill.api.TwillRunner;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
/**
*
*/
public final class DistributedFlowProgramRunner extends AbstractDistributedProgramRunner {
private static final Logger LOG = LoggerFactory.getLogger(DistributedFlowProgramRunner.class);
private final QueueAdmin queueAdmin;
private final StreamAdmin streamAdmin;
@Inject
DistributedFlowProgramRunner(TwillRunner twillRunner, Configuration hConfig,
CConfiguration cConfig, QueueAdmin queueAdmin, StreamAdmin streamAdmin) {
super(twillRunner, hConfig, cConfig);
this.queueAdmin = queueAdmin;
this.streamAdmin = streamAdmin;
}
@Override
protected ProgramController launch(Program program, ProgramOptions options,
File hConfFile, File cConfFile, ApplicationLauncher launcher) {
// Extract and verify parameters
ApplicationSpecification appSpec = program.getSpecification();
Preconditions.checkNotNull(appSpec, "Missing application specification.");
ProgramType processorType = program.getType();
Preconditions.checkNotNull(processorType, "Missing processor type.");
Preconditions.checkArgument(processorType == ProgramType.FLOW, "Only FLOW process type is supported.");
try {
FlowSpecification flowSpec = appSpec.getFlows().get(program.getName());
Preconditions.checkNotNull(flowSpec, "Missing FlowSpecification for %s", program.getName());
LOG.info("Configuring flowlets queues");
Multimap<String, QueueName> flowletQueues = FlowUtils.configureQueue(program, flowSpec, streamAdmin, queueAdmin);
// Launch flowlet program runners
LOG.info("Launching distributed flow: " + program.getName() + ":" + flowSpec.getName());
TwillController controller = launcher.launch(new FlowTwillApplication(program, flowSpec,
hConfFile, cConfFile, eventHandler));
DistributedFlowletInstanceUpdater instanceUpdater = new DistributedFlowletInstanceUpdater(program, controller,
queueAdmin, streamAdmin,
flowletQueues);
return new FlowTwillProgramController(program.getName(), controller, instanceUpdater).startListen();
} catch (Exception e) {
throw Throwables.propagate(e);
}
}
@Override
protected EventHandler createEventHandler(CConfiguration cConf) {
return new AbortOnTimeoutEventHandler(
cConf.getLong(Constants.CFG_TWILL_NO_CONTAINER_TIMEOUT, Long.MAX_VALUE), true);
}
}