org.apache.hadoop.yarn.server.resourcemanager.RMNMInfo.java Source code

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Here is the source code for org.apache.hadoop.yarn.server.resourcemanager.RMNMInfo.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.hadoop.yarn.server.resourcemanager;

import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.List;

import javax.management.NotCompliantMBeanException;
import javax.management.StandardMBean;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.metrics2.util.MBeans;
import org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ResourceScheduler;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNodeReport;
import org.mortbay.util.ajax.JSON;

/**
 * JMX bean listing statuses of all node managers.
 */
public class RMNMInfo implements RMNMInfoBeans {
    private static final Log LOG = LogFactory.getLog(RMNMInfo.class);
    private RMContext rmContext;
    private ResourceScheduler scheduler;

    /**
     * Constructor for RMNMInfo registers the bean with JMX.
     * 
     * @param rmc resource manager's context object
     * @param sched resource manager's scheduler object
     */
    public RMNMInfo(RMContext rmc, ResourceScheduler sched) {
        this.rmContext = rmc;
        this.scheduler = sched;

        StandardMBean bean;
        try {
            bean = new StandardMBean(this, RMNMInfoBeans.class);
            MBeans.register("ResourceManager", "RMNMInfo", bean);
        } catch (NotCompliantMBeanException e) {
            LOG.warn("Error registering RMNMInfo MBean", e);
        }
        LOG.info("Registered RMNMInfo MBean");
    }

    static class InfoMap extends LinkedHashMap<String, Object> {
        private static final long serialVersionUID = 1L;
    }

    /**
     * Implements getLiveNodeManagers()
     * 
     * @return JSON formatted string containing statuses of all node managers
     */
    @Override // RMNMInfoBeans
    public String getLiveNodeManagers() {
        Collection<RMNode> nodes = this.rmContext.getRMNodes().values();
        List<InfoMap> nodesInfo = new ArrayList<InfoMap>();

        for (final RMNode ni : nodes) {
            SchedulerNodeReport report = scheduler.getNodeReport(ni.getNodeID());
            InfoMap info = new InfoMap();
            info.put("HostName", ni.getHostName());
            info.put("Rack", ni.getRackName());
            info.put("State", ni.getState().toString());
            info.put("NodeId", ni.getNodeID());
            info.put("NodeHTTPAddress", ni.getHttpAddress());
            info.put("LastHealthUpdate", ni.getLastHealthReportTime());
            info.put("HealthReport", ni.getHealthReport());
            info.put("NodeManagerVersion", ni.getNodeManagerVersion());
            if (report != null) {
                info.put("NumContainers", report.getNumContainers());
                info.put("UsedMemoryMB", report.getUsedResource().getMemorySize());
                info.put("AvailableMemoryMB", report.getAvailableResource().getMemorySize());
            }

            nodesInfo.add(info);
        }

        return JSON.toString(nodesInfo);
    }
}