org.apache.flume.instrumentation.util.JMXPollUtil.java Source code

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Here is the source code for org.apache.flume.instrumentation.util.JMXPollUtil.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.flume.instrumentation.util;

import com.google.common.base.Throwables;
import com.google.common.collect.Maps;
import java.lang.management.ManagementFactory;
import java.util.Map;
import java.util.Set;
import javax.management.Attribute;
import javax.management.AttributeList;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanServer;
import javax.management.ObjectInstance;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 */
public class JMXPollUtil {

    private static Logger LOG = LoggerFactory.getLogger(JMXPollUtil.class);
    private static MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();

    public static Map<String, Map<String, String>> getAllMBeans() {
        Map<String, Map<String, String>> mbeanMap = Maps.newHashMap();
        Set<ObjectInstance> queryMBeans = null;
        try {
            queryMBeans = mbeanServer.queryMBeans(null, null);
        } catch (Exception ex) {
            LOG.error("Could not get Mbeans for monitoring", ex);
            Throwables.propagate(ex);
        }
        for (ObjectInstance obj : queryMBeans) {
            try {
                if (!obj.getObjectName().toString().startsWith("org.apache.flume")) {
                    continue;
                }
                MBeanAttributeInfo[] attrs = mbeanServer.getMBeanInfo(obj.getObjectName()).getAttributes();
                String strAtts[] = new String[attrs.length];
                for (int i = 0; i < strAtts.length; i++) {
                    strAtts[i] = attrs[i].getName();
                }
                AttributeList attrList = mbeanServer.getAttributes(obj.getObjectName(), strAtts);
                String component = obj.getObjectName().toString()
                        .substring(obj.getObjectName().toString().indexOf('=') + 1);
                Map<String, String> attrMap = Maps.newHashMap();

                for (Object attr : attrList) {
                    Attribute localAttr = (Attribute) attr;
                    if (localAttr.getName().equalsIgnoreCase("type")) {
                        component = localAttr.getValue() + "." + component;
                    }
                    attrMap.put(localAttr.getName(), localAttr.getValue().toString());
                }
                mbeanMap.put(component, attrMap);
            } catch (Exception e) {
                LOG.error("Unable to poll JMX for metrics.", e);
            }
        }
        return mbeanMap;
    }
}