Question

I want to create a JMX client, which can work with my server. I can connect to my server with jconsole, but how can I do it with java code.

This is my server code:

            MBeanServer mbeanServer = ManagementFactory
                .getPlatformMBeanServer();

        //giving name for service
        ObjectName objectName = new ObjectName("bean:name=logService");
        RequiredModelMBean mbean = new RequiredModelMBean();

        mbean.setManagedResource(logService, "objectReference");

        Descriptor logStringDescriptor = new DescriptorSupport(
                new String[] { "name=logString",
                        "descriptorType=attribute",
                        "getMethod=getLogString", "setMethod=setLogString" });
        
        ModelMBeanAttributeInfo logStringAttribute = new ModelMBeanAttributeInfo(
                "logString", "java.lang.String", "String to be logged",
                true, true, false, logStringDescriptor);

        ModelMBeanOperationInfo getLogStringOperation = new ModelMBeanOperationInfo(
                "Get the log string",
                LoggerService.class.getMethod("getLogString"));
        
        ModelMBeanOperationInfo setLogStringOperation = new ModelMBeanOperationInfo(
                "Set the log string", LoggerService.class.getMethod(
                        "setLogString", String.class));

        ModelMBeanInfo mbeanInfo = new ModelMBeanInfoSupport(
                "LoggerService", "Logger Service",
                new ModelMBeanAttributeInfo[] { logStringAttribute }, null,
                new ModelMBeanOperationInfo[] { getLogStringOperation,
                        setLogStringOperation }, null);

        mbean.setModelMBeanInfo(mbeanInfo);
        mbeanServer.registerMBean(mbean, objectName);

Answer 1

It is very simple 🙂

            MBeanServer mbeanServer = ManagementFactory
                .getPlatformMBeanServer();


        //giving name for service
        ObjectName objectName = new ObjectName("bean:name=logService");

        String str = (String) mbeanServer.getAttribute (objectName, "logString");
        System.out.println(str);