hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobStartWork.java

/*
 * Copyright 2009-2010 by The Regents of the University of California
 * Licensed 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 from
 * 
 *     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 edu.uci.ics.hyracks.control.cc.work;

import edu.uci.ics.hyracks.api.job.JobId;
import edu.uci.ics.hyracks.api.job.JobStatus;
import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
import edu.uci.ics.hyracks.control.cc.job.JobRun;
import edu.uci.ics.hyracks.control.common.work.IResultCallback;
import edu.uci.ics.hyracks.control.common.work.SynchronizableWork;

public class JobStartWork extends SynchronizableWork {
    private final ClusterControllerService ccs;
    private final JobId jobId;
    private final IResultCallback<Object> callback;

    public JobStartWork(ClusterControllerService ccs, JobId jobId, IResultCallback<Object> callback) {
        this.ccs = ccs;
        this.jobId = jobId;
        this.callback = callback;
    }

    @Override
    protected void doRun() throws Exception {
        try {
            JobRun run = ccs.getActiveRunMap().get(jobId);
            if (run == null) {
                throw new Exception("Unable to find job with id = " + jobId);
            }
            if (run.getStatus() != JobStatus.INITIALIZED) {
                throw new Exception("Job already started");
            }
            run.setStatus(JobStatus.RUNNING, null);
            try {
                run.getScheduler().startJob();
            } catch (Exception e) {
                ccs.getWorkQueue().schedule(new JobCleanupWork(ccs, run.getJobId(), JobStatus.FAILURE, e));
            }
            callback.setValue(null);
        } catch (Exception e) {
            callback.setException(e);
        }
    }
}