/*
* 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 gobblin.runtime.std;
import java.io.Closeable;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.ExecutorService;
import org.slf4j.Logger;
import com.google.common.base.Optional;
import gobblin.runtime.JobState.RunningState;
import gobblin.runtime.api.JobCatalogListenersContainer;
import gobblin.runtime.api.JobExecutionDriver;
import gobblin.runtime.api.JobExecutionState;
import gobblin.runtime.api.JobExecutionStateListener.MetadataChangeCallback;
import gobblin.runtime.api.JobExecutionStateListener.StageTransitionCallback;
import gobblin.runtime.api.JobExecutionStateListener.StatusChangeCallback;
import gobblin.runtime.api.JobLifecycleListener;
import gobblin.runtime.api.JobLifecycleListenersContainer;
import gobblin.runtime.api.JobSpecSchedulerListenersContainer;
import gobblin.util.callbacks.CallbacksDispatcher;
/**
* A default implementation to manage a list of {@link JobLifecycleListener}
*
*/
public class JobLifecycleListenersList implements JobLifecycleListenersContainer, Closeable {
private final CallbacksDispatcher<JobLifecycleListener> _dispatcher;
private final JobCatalogListenersContainer _jobCatalogDelegate;
private final JobSpecSchedulerListenersContainer _jobSchedulerDelegate;
public JobLifecycleListenersList(JobCatalogListenersContainer jobCatalogDelegate,
JobSpecSchedulerListenersContainer jobSchedulerDelegate,
Optional<ExecutorService> execService,
Optional<Logger> log) {
_dispatcher = new CallbacksDispatcher<>(execService, log);
_jobCatalogDelegate = jobCatalogDelegate;
_jobSchedulerDelegate = jobSchedulerDelegate;
}
public JobLifecycleListenersList(JobCatalogListenersContainer jobCatalogDelegate,
JobSpecSchedulerListenersContainer jobSchedulerDelegate,
Logger log) {
this(jobCatalogDelegate, jobSchedulerDelegate,
Optional.<ExecutorService>absent(), Optional.of(log));
}
public JobLifecycleListenersList(JobCatalogListenersContainer jobCatalogDelegate,
JobSpecSchedulerListenersContainer jobSchedulerDelegate) {
this(jobCatalogDelegate, jobSchedulerDelegate,
Optional.<ExecutorService>absent(), Optional.<Logger>absent());
}
/** {@inheritDoc} */
@Override
public void registerJobLifecycleListener(JobLifecycleListener listener) {
_dispatcher.addListener(listener);
_jobCatalogDelegate.addListener(listener);
_jobSchedulerDelegate.registerJobSpecSchedulerListener(listener);
}
/** {@inheritDoc} */
@Override
public void unregisterJobLifecycleListener(JobLifecycleListener listener) {
_jobSchedulerDelegate.unregisterJobSpecSchedulerListener(listener);
_jobCatalogDelegate.removeListener(listener);
_dispatcher.removeListener(listener);
}
@Override
public void close()
throws IOException {
_dispatcher.close();
}
/** {@inheritDoc} */
@Override
public List<JobLifecycleListener> getJobLifecycleListeners() {
return _dispatcher.getListeners();
}
public void onStatusChange(JobExecutionState state, RunningState previousStatus,
RunningState newStatus) {
try {
_dispatcher.execCallbacks(new StatusChangeCallback(state, previousStatus, newStatus));
} catch (InterruptedException e) {
_dispatcher.getLog().warn("onStatusChange interrupted.");
}
}
public void onStageTransition(JobExecutionState state, String previousStage, String newStage) {
try {
_dispatcher.execCallbacks(new StageTransitionCallback(state, previousStage, newStage));
} catch (InterruptedException e) {
_dispatcher.getLog().warn("onStageTransition interrupted.");
}
}
public void onMetadataChange(JobExecutionState state, String key, Object oldValue, Object newValue) {
try {
_dispatcher.execCallbacks(new MetadataChangeCallback(state, key, oldValue, newValue));
} catch (InterruptedException e) {
_dispatcher.getLog().warn("onMetadataChange interrupted.");
}
}
public void onJobLaunch(JobExecutionDriver driver) {
try {
_dispatcher.execCallbacks(new JobLifecycleListener.JobLaunchCallback(driver));
} catch (InterruptedException e) {
_dispatcher.getLog().warn("onJobLaunch interrupted.");
}
}
@Override
public void registerWeakJobLifecycleListener(JobLifecycleListener listener) {
_dispatcher.addWeakListener(listener);
_jobCatalogDelegate.registerWeakJobCatalogListener(listener);
_jobSchedulerDelegate.registerWeakJobSpecSchedulerListener(listener);
}
}