/**
* 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.hive.hcatalog.templeton;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hive.shims.HadoopShims.WebHCatJTShim;
import org.apache.hadoop.hive.shims.ShimLoader;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.mapred.JobID;
import org.apache.hadoop.mapred.JobProfile;
import org.apache.hadoop.mapred.JobStatus;
import org.apache.hive.hcatalog.templeton.tool.JobState;
/**
* Fetch the status of a given job id in the queue. There are three sources of the info
* 1. Query result from JobTracker
* 2. JobState saved by TempletonControllerJob when monitoring the TempletonControllerJob
* 3. TempletonControllerJob put a JobState for every job it launches, so child job can
* retrieve its parent job by its JobState
*
* Currently there is no permission restriction, any user can query any job
*/
public class StatusDelegator extends TempletonDelegator {
private static final Log LOG = LogFactory.getLog(StatusDelegator.class);
public StatusDelegator(AppConfig appConf) {
super(appConf);
}
public QueueStatusBean run(String user, String id)
throws NotAuthorizedException, BadParam, IOException, InterruptedException
{
WebHCatJTShim tracker = null;
JobState state = null;
try {
UserGroupInformation ugi = UgiFactory.getUgi(user);
tracker = ShimLoader.getHadoopShims().getWebHCatShim(appConf, ugi);
JobID jobid = StatusDelegator.StringToJobID(id);
if (jobid == null)
throw new BadParam("Invalid jobid: " + id);
state = new JobState(id, Main.getAppConfigInstance());
return StatusDelegator.makeStatus(tracker, jobid, state);
} catch (IllegalStateException e) {
throw new BadParam(e.getMessage());
} finally {
if (tracker != null)
tracker.close();
if (state != null)
state.close();
}
}
static QueueStatusBean makeStatus(WebHCatJTShim tracker,
JobID jobid,
JobState state)
throws BadParam, IOException {
JobStatus status = tracker.getJobStatus(jobid);
JobProfile profile = tracker.getJobProfile(jobid);
if (status == null || profile == null) // No such job.
throw new BadParam("Could not find job " + jobid);
return new QueueStatusBean(state, status, profile);
}
/**
* A version of JobID.forName with our app specific error handling.
*/
public static JobID StringToJobID(String id)
throws BadParam {
try {
return JobID.forName(id);
} catch (IllegalArgumentException e) {
throw new BadParam(e.getMessage());
}
}
}