/**
* 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.falcon.workflow.engine;
import org.apache.falcon.FalconException;
import org.apache.falcon.entity.ClusterHelper;
import org.apache.falcon.entity.EntityUtil;
import org.apache.falcon.entity.v0.Entity;
import org.apache.falcon.entity.v0.EntityType;
import org.apache.falcon.entity.v0.cluster.Cluster;
import org.apache.falcon.hadoop.HadoopClientFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.log4j.Logger;
/**
* Service that cleans up artifacts that falcon dropped on hdfs for oozie's use.
*/
public class OozieHouseKeepingService implements WorkflowEngineActionListener {
private static final Logger LOG = Logger.getLogger(OozieHouseKeepingService.class);
@Override
public void beforeSchedule(Entity entity, String cluster) throws FalconException {
}
@Override
public void afterSchedule(Entity entity, String cluster) throws FalconException {
}
@Override
public void beforeDelete(Entity entity, String cluster) throws FalconException {
}
@Override
public void afterDelete(Entity entity, String clusterName) throws FalconException {
try {
Cluster cluster = EntityUtil.getEntity(EntityType.CLUSTER, clusterName);
Path entityPath = EntityUtil.getBaseStagingPath(cluster, entity);
LOG.info("Deleting entity path " + entityPath + " on cluster " + clusterName);
Configuration conf = ClusterHelper.getConfiguration(cluster);
FileSystem fs = HadoopClientFactory.get().createFileSystem(conf);
if (fs.exists(entityPath) && !fs.delete(entityPath, true)) {
throw new FalconException("Unable to cleanup entity path: " + entityPath);
}
} catch (Exception e) {
throw new FalconException(
"Failed to cleanup entity path for " + entity.toShortString() + " on cluster " + clusterName, e);
}
}
@Override
public void beforeSuspend(Entity entity, String cluster) throws FalconException {
}
@Override
public void afterSuspend(Entity entity, String cluster) throws FalconException {
}
@Override
public void beforeResume(Entity entity, String cluster) throws FalconException {
}
@Override
public void afterResume(Entity entity, String cluster) throws FalconException {
}
}