/*
* 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 org.slf4j.Logger;
import com.google.common.base.Optional;
import gobblin.runtime.JobState.RunningState;
import gobblin.runtime.api.JobExecutionState;
import gobblin.runtime.api.JobExecutionStateListener;
/**
* Default NOOP implementation for a {@link JobExecutionStateListener}. The implementation can
* optionally log the callbacks.
*/
public class DefaultJobExecutionStateListenerImpl implements JobExecutionStateListener {
protected final Optional<Logger> _log;
/**
* Constructor
* @param log if present, the implementation will log each callback at INFO level
*/
public DefaultJobExecutionStateListenerImpl(Optional<Logger> log) {
_log = log;
}
public DefaultJobExecutionStateListenerImpl(Logger log) {
this(Optional.of(log));
}
/** Constructor with no logging */
public DefaultJobExecutionStateListenerImpl() {
this(Optional.<Logger>absent());
}
/** {@inheritDoc} */
@Override
public void onStatusChange(JobExecutionState state, RunningState previousStatus, RunningState newStatus) {
if (_log.isPresent()) {
_log.get().info("JobExection status change for " + state.getJobSpec().toShortString() +
": " + previousStatus + " --> " + newStatus);
}
}
/** {@inheritDoc} */
@Override
public void onStageTransition(JobExecutionState state, String previousStage, String newStage) {
if (_log.isPresent()) {
_log.get().info("JobExection stage change for " + state.getJobSpec().toShortString() +
": " + previousStage + " --> " + newStage);
}
}
/** {@inheritDoc} */
@Override
public void onMetadataChange(JobExecutionState state, String key, Object oldValue,
Object newValue) {
if (_log.isPresent()) {
_log.get().info("JobExection metadata change for " + state.getJobSpec().toShortString() +
key + ": '" + oldValue + "' --> '" + newValue + "'");
}
}
}