com.ibm.bi.dml.yarn.DMLAppMasterStatusReporter.java Source code

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Here is the source code for com.ibm.bi.dml.yarn.DMLAppMasterStatusReporter.java

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/**
 * (C) Copyright IBM Corp. 2010, 2015
 *
 * 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 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 com.ibm.bi.dml.yarn;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.yarn.client.api.AMRMClient;
import org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest;

public class DMLAppMasterStatusReporter extends Thread {

    public static long DEFAULT_REPORT_INTERVAL = 5000;
    private static final Log LOG = LogFactory.getLog(DMLAppMasterStatusReporter.class);

    private AMRMClient<ContainerRequest> _rmClient;
    private long _interval; //in ms
    private boolean _stop;

    public DMLAppMasterStatusReporter(AMRMClient<ContainerRequest> rmClient, long interval) {
        _rmClient = rmClient;
        _interval = interval;
        _stop = false;
    }

    public void stopStatusReporter() {
        _stop = true;
    }

    @Override
    public void run() {
        while (!_stop) {
            try {
                //report status (serves as heatbeat to RM)
                _rmClient.allocate(0);

                //sleep for interval ms until next report
                Thread.sleep(_interval);
            } catch (Exception ex) {
                LOG.error("Failed to report status to ResourceManager.", ex);
            }
        }
    }
}