/**
* 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.listener;
import org.apache.commons.io.FileUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.JobTracker;
import org.apache.hadoop.mapred.TaskTracker;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import java.io.File;
/**
* Listener for bootstrapping embedded hadoop cluster for integration tests.
*/
public class HadoopStartupListener implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent sce) {
try {
FileUtils.deleteDirectory(new File(System.getProperty("hadoop.tmp.dir")));
final Configuration conf = new Configuration();
NameNode.format(conf);
final String[] emptyArgs = {};
NameNode.createNameNode(emptyArgs, conf);
DataNode.createDataNode(emptyArgs, conf);
final JobTracker jobTracker = JobTracker.startTracker(new JobConf(conf));
new Thread(new Runnable() {
@Override
public void run() {
try {
jobTracker.offerService();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}).start();
new Thread(new Runnable() {
@Override
public void run() {
try {
TaskTracker taskTracker = new TaskTracker(new JobConf(conf));
taskTracker.run();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}).start();
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("Unable to start hadoop cluster", e);
}
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
}
}