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WebLogic JMX API Example: How to monitor Weblogic Heap Space and memory parameters using JVMRuntime MBean

The Java code mentioned in this post connects to WebLogic server and prints all the WebLogic JVMRuntime properties using JVMRuntimeBean object

Note: Add the C:\middleware1213\wlserver\server\lib\wljmxclient.jar if you connect to the WebLogic Server remotely

The WebLogic JVMRuntime MBean can be referred to the JConsole as below:

Supported WebLogic JVMRuntime Attributes & Operations

Refer the below Java class for other JVMRuntimeMBean attributes

https://docs.oracle.com/cd/E50629_01/wls/WLAPI/weblogic/management/runtime/JVMRuntimeMBean.html

The below Java code Prints all the WebLogic JVMRuntime Properties using JVMRuntimeMBean

package com.catgovind;

import java.io.IOException;
import java.net.MalformedURLException;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Properties;

import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
import javax.naming.Context;

import com.sun.xml.internal.bind.v2.runtime.output.StAXExStreamWriterOutput;

public class WeblogicMonitor {
	
	
	//Input your WebLogic credentials to connect to connect your Weblogic server    
		private static String hostname = "localhost";
		private static String portString = "7001";
		private static String username = "weblogic";
		private static String password = "password123";

			// TODO Auto-generated method stub
			private static MBeanServerConnection connection;
		    private static JMXConnector connector;
		    private static final ObjectName service=null;
		    ObjectName[]  atnProviders  = null;
		    ObjectName mBeanTypeService = null;
		 
		 //This method creates a WebLogic connection  Object
		 public static void initConnection() throws IOException,
		       MalformedURLException {
		 
		       String protocol = "t3";
		       Integer portInteger = Integer.valueOf(portString);
		       int port = portInteger.intValue();
		       String jndiroot = "/jndi/";
		       String mserver = "weblogic.management.mbeanservers.domainruntime";
		       JMXServiceURL serviceURL = new JMXServiceURL(protocol, hostname, port,
		       jndiroot + mserver);
		 
		       Hashtable h = new Hashtable();
		       h.put(Context.SECURITY_PRINCIPAL, username);
		       h.put(Context.SECURITY_CREDENTIALS, password);
		       h.put(JMXConnectorFactory.PROTOCOL_PROVIDER_PACKAGES,
		          "weblogic.management.remote");
		       h.put("jmx.remote.x.request.waiting.timeout", new Long(10000));
		       connector = JMXConnectorFactory.connect(serviceURL, h);
		       connection = connector.getMBeanServerConnection();
		    }
	
		 public static ObjectName[] getServerRuntimes() throws Exception {
			  ObjectName service = new ObjectName(
			            "com.bea:Name=DomainRuntimeService,Type=weblogic.management."
			            + "mbeanservers.domainruntime.DomainRuntimeServiceMBean");
		      return (ObjectName[]) connection.getAttribute(service,
		         "ServerRuntimes");
		   }
  
 //	com.bea:Name=AdminServer,ServerRuntime=AdminServer,Type=PrintMemory
 public static void printMemory() throws Exception {
	 ObjectName[] servers = getServerRuntimes();
	for (int i = 0; i 
OutPut: 

Server Instance=com.bea:Name=AdminServer,Location=AdminServer,Type=ServerRuntime

Heap Free Percent = 64%

Heap Size Max = 477626368

Uptime = 15707489

OS Name = Windows 10

Java Version = 1.8.0_151

Heap Free Current = 295701328

Name = AdminServer

Type = JVMRuntime

Java VM Vendor = Oracle Corporation

Java Vendor = Oracle Corporation

OS Version = 10.0

Heap Size Current = 465043456

Thread Stack Dump = “RMI TCP Connection(8)-192.168.253.1” Id=200 RUNNABLE (in native)…
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