/*
 * 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.control.cc.ClusterControllerService;
import edu.uci.ics.hyracks.control.cc.job.IJobStatusConditionVariable;
import edu.uci.ics.hyracks.control.common.work.IResultCallback;
import edu.uci.ics.hyracks.control.common.work.SynchronizableWork;

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

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

    @Override
    protected void doRun() throws Exception {
        final IJobStatusConditionVariable cRunningVar = ccs.getActiveRunMap().get(jobId);
        if (cRunningVar != null) {
            ccs.getExecutor().execute(new Runnable() {
                @Override
                public void run() {
                    try {
                        cRunningVar.waitForCompletion();
                        callback.setValue(null);
                    } catch (Exception e) {
                        callback.setException(e);
                    }
                }
            });
        } else {
            final IJobStatusConditionVariable cArchivedVar = ccs.getRunMapArchive().get(jobId);
            ccs.getExecutor().execute(new Runnable() {
                @Override
                public void run() {
                    try {
                        cArchivedVar.waitForCompletion();
                        callback.setValue(null);
                    } catch (Exception e) {
                        callback.setException(e);
                    }
                }
            });
        }
    }
}