What is an MBean attribute?

What is an MBean attribute?

Attributes are conceptual variables that are exposed for management through getter and setter methods in the MBean interface: A getter is any public method whose name begins with get and which does not return void; it enables a manager to read the value of the attribute, whose type is that of the returned object.

What is JMX attribute?

According to the JMX specification, an MBean interface consists of named and typed attributes that are readable and possibly writable, and named and typed operations that can be invoked by the applications that are managed by the MBean.

What is MXBean?

An MXBean is a type of MBean that references only a predefined set of data types. In this way, you can be sure that your MBean will be usable by any client, including remote clients, without any requirement that the client have access to model-specific classes representing the types of your MBeans.

What is JMX API?

The Java Management Extensions (JMX) API is a standard API for management and monitoring of resources such as applications, devices, services, and the Java virtual machine.

What is @ManagedResource in spring?

The @ManagedResource annotation indicates that the bean can be exported as a JMX MBean. It’s objectName attribute is optional, but can be used to specify a specific name for the MBean. In this case it will be exposed under the ‘org.

What is an MBean server?

An MBean server is a repository of MBeans that provides management applications access to MBeans. Applications do not access MBeans directly, but instead access them through the MBean server via their unique ObjectName. An MBean server implements the interface javax. management. MBeanServer.

What is JMX in Tomcat?

JMX (Java Management Extension) is a very powerful technology, which lets you administer, monitor and configure Tomcat MBeans. If you are a Tomcat administrator, then you should be familiar with how to enable JMX in tomcat to monitor Heap Memory, Threads, CPU Usage, Classes, and configure various MBeans.

What is JMX MBean?

The core component of a JMX agent is the MBean server. An MBean server is a managed object server in which MBeans are registered. A JMX agent also includes a set of services to manage MBeans. See the API documentation for the MBeanServer interface for details of the MBean server implementation.

What is the use of MBean?

An MBean is a managed Java object, similar to a JavaBeans component, that follows the design patterns set forth in the JMX specification. An MBean can represent a device, an application, or any resource that needs to be managed.

When to use the @ MXBean annotation in Java?

Every method in the interface defines either an attribute or an operation in the MXBean. The annotation @MXBean can be also used to annotate the Java interface, instead of requiring the interface’s name to be followed by the MXBean suffix.

Which is a special type of MBean in Java?

This section explains a special type of MBean, called MXBeans. An MXBean is a type of MBean that references only a predefined set of data types.

How is An MXBean defined in a Java class?

In the same way as for standard MBeans, an MXBean is defined by writing a Java interface called SomethingMXBean and a Java class that implements that interface. However, unlike standard MBeans, MXBeans do not require the Java class to be called Something. Every method in the interface defines either an attribute or an operation in the MXBean.