co.cask.cdap.operations.yarn.YarnQueues.java Source code

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Here is the source code for co.cask.cdap.operations.yarn.YarnQueues.java

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/*
 * Copyright  2016 Cask Data, Inc.
 *
 * 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 co.cask.cdap.operations.yarn;

import co.cask.cdap.operations.OperationalStats;
import com.google.common.annotations.VisibleForTesting;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.api.records.QueueInfo;
import org.apache.hadoop.yarn.client.api.YarnClient;

import java.util.List;

/**
 * {@link OperationalStats} for reporting Yarn Queue Stats.
 */
public class YarnQueues extends AbstractYarnStats implements YarnQueuesMXBean {

    private int stopped;
    private int running;

    @SuppressWarnings("unused")
    public YarnQueues() {
        this(new Configuration());
    }

    @VisibleForTesting
    YarnQueues(Configuration conf) {
        super(conf);
    }

    @Override
    public String getStatType() {
        return "queues";
    }

    @Override
    public int getTotal() {
        return running + stopped;
    }

    @Override
    public int getStopped() {
        return stopped;
    }

    @Override
    public int getRunning() {
        return running;
    }

    @Override
    public synchronized void collect() throws Exception {
        reset();
        List<QueueInfo> queues;
        YarnClient yarnClient = createYARNClient();
        try {
            queues = yarnClient.getAllQueues();
        } finally {
            yarnClient.stop();
        }
        for (QueueInfo queue : queues) {
            switch (queue.getQueueState()) {
            case RUNNING:
                running++;
                break;
            case STOPPED:
                stopped++;
                break;
            }
        }
    }

    private void reset() {
        running = 0;
        stopped = 0;
    }
}