com.amazonaws.jmx.JmxInfoProviderSupport Maven / Gradle / Ivy

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The Amazon Web Services SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

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/*
 * Copyright 2011-2014 Amazon Technologies, 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://aws.amazon.com/apache2.0
 *
 * This file 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.amazonaws.jmx;

import java.lang.management.ManagementFactory;
import java.lang.management.ThreadMXBean;
import java.util.List;

import javax.management.Attribute;
import javax.management.AttributeList;
import javax.management.MBeanServer;
import javax.management.ObjectName;

import org.apache.commons.logging.LogFactory;

import com.amazonaws.jmx.spi.JmxInfoProvider;

public class JmxInfoProviderSupport implements JmxInfoProvider {
    @Override
    public long[] getFileDecriptorInfo() {
        MBeanServer mbsc = MBeans.getMBeanServer();
        AttributeList attributes;
        try {
            attributes = mbsc.getAttributes(
                new ObjectName("java.lang:type=OperatingSystem"), 
                new String[]{"OpenFileDescriptorCount", "MaxFileDescriptorCount"});
            List attrList = attributes.asList();
            long openFdCount = (Long)attrList.get(0).getValue();
            long maxFdCount = (Long)attrList.get(1).getValue();
            long[] fdCounts = { openFdCount, maxFdCount};
            return fdCounts;
        } catch (Exception e) {
            LogFactory.getLog(SdkMBeanRegistrySupport.class).debug(
                    "Failed to retrieve file descriptor info", e);
        }
        return null;
    }

    @Override
    public int getThreadCount() {
      ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
      return threadMXBean.getThreadCount();
    }

    @Override
    public int getDaemonThreadCount() {
        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
        return threadMXBean.getDaemonThreadCount();
    }

    @Override
    public int getPeakThreadCount() {
        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
        return threadMXBean.getPeakThreadCount();
    }

    @Override
    public long getTotalStartedThreadCount() {
        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
        return threadMXBean.getTotalStartedThreadCount();
    }

    @Override
    public long[] findDeadlockedThreads() {
        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
        return threadMXBean.findDeadlockedThreads();
    }

    @Override
    public boolean isEnabled() {
        return true;
    }
}