/**
* 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.oozie.process;
import org.apache.falcon.FalconException;
import org.apache.falcon.entity.EntityUtil;
import org.apache.falcon.entity.v0.cluster.Cluster;
import org.apache.falcon.entity.v0.process.Process;
import org.apache.falcon.oozie.workflow.ACTION;
import org.apache.falcon.oozie.workflow.DELETE;
import org.apache.falcon.oozie.workflow.PIG;
import org.apache.falcon.oozie.workflow.PREPARE;
import org.apache.hadoop.fs.Path;
import java.util.List;
/**
* Builds orchestration workflow for process where engine is pig.
*/
public class PigProcessWorkflowBuilder extends ProcessExecutionWorkflowBuilder {
private static final String ACTION_TEMPLATE = "/action/process/pig-action.xml";
public PigProcessWorkflowBuilder(Process entity) {
super(entity);
}
@Override protected ACTION getUserAction(Cluster cluster, Path buildPath) throws FalconException {
ACTION action = unmarshalAction(ACTION_TEMPLATE);
PIG pigAction = action.getPig();
Path userWfPath = new Path(entity.getWorkflow().getPath());
pigAction.setScript(getStoragePath(userWfPath));
addPrepareDeleteOutputPath(pigAction);
final List<String> paramList = pigAction.getParam();
addInputFeedsAsParams(paramList, cluster);
addOutputFeedsAsParams(paramList, cluster);
propagateEntityProperties(pigAction.getConfiguration(), pigAction.getParam());
if (EntityUtil.isTableStorageType(cluster, entity)) { // adds hive-site.xml in pig classpath
pigAction.getFile().add("${wf:appPath()}/conf/hive-site.xml");
}
addArchiveForCustomJars(cluster, pigAction.getArchive(), entity.getWorkflow().getLib());
return action;
}
private void addPrepareDeleteOutputPath(PIG pigAction) throws FalconException {
List<String> deleteOutputPathList = getPrepareDeleteOutputPathList();
if (deleteOutputPathList.isEmpty()) {
return;
}
final PREPARE prepare = new PREPARE();
final List<DELETE> deleteList = prepare.getDelete();
for (String deletePath : deleteOutputPathList) {
final DELETE delete = new DELETE();
delete.setPath(deletePath);
deleteList.add(delete);
}
if (!deleteList.isEmpty()) {
pigAction.setPrepare(prepare);
}
}
}