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

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Here is the source code for co.cask.cdap.operations.yarn.YarnNodes.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.NodeReport;
import org.apache.hadoop.yarn.client.api.YarnClient;

import java.util.List;

/**
 * {@link OperationalStats} for reporting Yarn node stats.
 */
public class YarnNodes extends AbstractYarnStats implements YarnNodesMXBean {

    private int healthyNodes;
    private int newNodes;
    private int unusableNodes;
    private int healthyContainers;
    private int newContainers;
    private int unusableContainers;

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

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

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

    @Override
    public int getTotalNodes() {
        return healthyNodes + newNodes + unusableNodes;
    }

    @Override
    public int getHealthyNodes() {
        return healthyNodes;
    }

    @Override
    public int getNewNodes() {
        return newNodes;
    }

    @Override
    public int getUnusableNodes() {
        return unusableNodes;
    }

    @Override
    public int getTotalContainers() {
        return healthyContainers + newContainers + unusableContainers;
    }

    @Override
    public int getHealthyContainers() {
        return healthyContainers;
    }

    @Override
    public int getNewContainers() {
        return newContainers;
    }

    @Override
    public int getUnusableContainers() {
        return unusableContainers;
    }

    @Override
    public synchronized void collect() throws Exception {
        reset();
        List<NodeReport> nodeReports;
        YarnClient yarnClient = createYARNClient();
        try {
            nodeReports = yarnClient.getNodeReports();
        } finally {
            yarnClient.stop();
        }
        for (NodeReport nodeReport : nodeReports) {
            switch (nodeReport.getNodeState()) {
            case RUNNING:
                healthyNodes++;
                healthyContainers += nodeReport.getNumContainers();
                break;
            case UNHEALTHY:
            case DECOMMISSIONED:
            case LOST:
                unusableNodes++;
                unusableContainers += nodeReport.getNumContainers();
                break;
            case NEW:
            case REBOOTED:
                newNodes++;
                newContainers += nodeReport.getNumContainers();
                break;
            }
        }
    }

    private void reset() {
        healthyNodes = 0;
        unusableNodes = 0;
        newNodes = 0;
        healthyContainers = 0;
        unusableContainers = 0;
        newContainers = 0;
    }
}