javax.management

## Class JMX

- java.lang.Object
- - javax.management.JMX

-     public class JMX
      extends Object

  Static methods from the JMX API. There are no instances of this class.
  Since:
    1.6

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static String` | `DEFAULT_VALUE_FIELD` The name of the `defaultValue` field.
    `static String` | `IMMUTABLE_INFO_FIELD` The name of the `immutableInfo` field.
    `static String` | `INTERFACE_CLASS_NAME_FIELD` The name of the `interfaceClassName` field.
    `static String` | `LEGAL_VALUES_FIELD` The name of the `legalValues` field.
    `static String` | `MAX_VALUE_FIELD` The name of the `maxValue` field.
    `static String` | `MIN_VALUE_FIELD` The name of the `minValue` field.
    `static String` | `MXBEAN_FIELD` The name of the `mxbean` field.
    `static String` | `OPEN_TYPE_FIELD` The name of the `openType` field.
    `static String` | `ORIGINAL_TYPE_FIELD` The name of the `originalType` field.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `static boolean` | `isMXBeanInterface(Class<?> interfaceClass)` Test whether an interface is an MXBean interface.
    `static <T> T` | `newMBeanProxy(MBeanServerConnection connection, ObjectName objectName, Class<T> interfaceClass)` Make a proxy for a Standard MBean in a local or remote MBean Server.
    `static <T> T` | `newMBeanProxy(MBeanServerConnection connection, ObjectName objectName, Class<T> interfaceClass, boolean notificationEmitter)` Make a proxy for a Standard MBean in a local or remote MBean Server that may also support the methods of `NotificationEmitter`.
    `static <T> T` | `newMXBeanProxy(MBeanServerConnection connection, ObjectName objectName, Class<T> interfaceClass)` Make a proxy for an MXBean in a local or remote MBean Server.
    `static <T> T` | `newMXBeanProxy(MBeanServerConnection connection, ObjectName objectName, Class<T> interfaceClass, boolean notificationEmitter)` Make a proxy for an MXBean in a local or remote MBean Server that may also support the methods of `NotificationEmitter`.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### DEFAULT_VALUE_FIELD

          public static final String DEFAULT_VALUE_FIELD

      The name of the `defaultValue` field.
      See Also:
        Constant Field Values

    - #### IMMUTABLE_INFO_FIELD

          public static final String IMMUTABLE_INFO_FIELD

      The name of the `immutableInfo` field.
      See Also:
        Constant Field Values

    - #### INTERFACE_CLASS_NAME_FIELD

          public static final String INTERFACE_CLASS_NAME_FIELD

      The name of the `interfaceClassName` field.
      See Also:
        Constant Field Values

    - #### LEGAL_VALUES_FIELD

          public static final String LEGAL_VALUES_FIELD

      The name of the `legalValues` field.
      See Also:
        Constant Field Values

    - #### MAX_VALUE_FIELD

          public static final String MAX_VALUE_FIELD

      The name of the `maxValue` field.
      See Also:
        Constant Field Values

    - #### MIN_VALUE_FIELD

          public static final String MIN_VALUE_FIELD

      The name of the `minValue` field.
      See Also:
        Constant Field Values

    - #### MXBEAN_FIELD

          public static final String MXBEAN_FIELD

      The name of the `mxbean` field.
      See Also:
        Constant Field Values

    - #### OPEN_TYPE_FIELD

          public static final String OPEN_TYPE_FIELD

      The name of the `openType` field.
      See Also:
        Constant Field Values

    - #### ORIGINAL_TYPE_FIELD

          public static final String ORIGINAL_TYPE_FIELD

      The name of the `originalType` field.
      See Also:
        Constant Field Values

  - ### Method Detail

    - #### newMBeanProxy

          public static <T> T newMBeanProxy(MBeanServerConnection connection,
                            ObjectName objectName,
                            Class<T> interfaceClass)

      Make a proxy for a Standard MBean in a local or remote MBean Server.

      If you have an MBean Server `mbs` containing an MBean with `ObjectName` `name`, and if the MBean's management interface is described by the Java interface `MyMBean`, you can construct a proxy for the MBean like this:

           MyMBean proxy = JMX.newMBeanProxy(mbs, name, MyMBean.class);

      Suppose, for example, `MyMBean` looks like this:

           public interface MyMBean {
               public String getSomeAttribute();
               public void setSomeAttribute(String value);
               public void someOperation(String param1, int param2);
           }

      Then you can execute:

      - `proxy.getSomeAttribute()` which will result in a call to `mbs.``getAttribute``(name, "SomeAttribute")`.
      - `proxy.setSomeAttribute("whatever")` which will result in a call to `mbs.``setAttribute``(name, new Attribute("SomeAttribute", "whatever"))`.
      - `proxy.someOperation("param1", 2)` which will be translated into a call to `mbs.``invoke``(name, "someOperation", <etc>)`.

      The object returned by this method is a `Proxy` whose `InvocationHandler` is an `MBeanServerInvocationHandler`.

      This method is equivalent to `newMBeanProxy(connection, objectName, interfaceClass, false)`.

      Type Parameters:
        `T` - allows the compiler to know that if the `interfaceClass` parameter is `MyMBean.class`, for example, then the return type is `MyMBean`.
      Parameters:
        `connection` - the MBean server to forward to.
        `objectName` - the name of the MBean within `connection` to forward to.
        `interfaceClass` - the management interface that the MBean exports, which will also be implemented by the returned proxy.
      Returns:
        the new proxy instance.

    - #### newMBeanProxy

          public static <T> T newMBeanProxy(MBeanServerConnection connection,
                            ObjectName objectName,
                            Class<T> interfaceClass,
                            boolean notificationEmitter)

      Make a proxy for a Standard MBean in a local or remote MBean Server that may also support the methods of `NotificationEmitter`.

      This method behaves the same as `newMBeanProxy(MBeanServerConnection, ObjectName, Class)`, but additionally, if `notificationEmitter` is `true`, then the MBean is assumed to be a `NotificationBroadcaster` or `NotificationEmitter` and the returned proxy will implement `NotificationEmitter` as well as `interfaceClass`. A call to `NotificationBroadcaster.addNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)` on the proxy will result in a call to `MBeanServerConnection.addNotificationListener(ObjectName, NotificationListener, NotificationFilter, Object)`, and likewise for the other methods of `NotificationBroadcaster` and `NotificationEmitter`.

      Type Parameters:
        `T` - allows the compiler to know that if the `interfaceClass` parameter is `MyMBean.class`, for example, then the return type is `MyMBean`.
      Parameters:
        `connection` - the MBean server to forward to.
        `objectName` - the name of the MBean within `connection` to forward to.
        `interfaceClass` - the management interface that the MBean exports, which will also be implemented by the returned proxy.
        `notificationEmitter` - make the returned proxy implement `NotificationEmitter` by forwarding its methods via `connection`.
      Returns:
        the new proxy instance.

    - #### newMXBeanProxy

          public static <T> T newMXBeanProxy(MBeanServerConnection connection,
                             ObjectName objectName,
                             Class<T> interfaceClass)

      Make a proxy for an MXBean in a local or remote MBean Server.

      If you have an MBean Server `mbs` containing an MXBean with `ObjectName` `name`, and if the MXBean's management interface is described by the Java interface `MyMXBean`, you can construct a proxy for the MXBean like this:

           MyMXBean proxy = JMX.newMXBeanProxy(mbs, name, MyMXBean.class);

      Suppose, for example, `MyMXBean` looks like this:

           public interface MyMXBean {
               public String getSimpleAttribute();
               public void setSimpleAttribute(String value);
               public MemoryUsage getMappedAttribute();
               public void setMappedAttribute(MemoryUsage memoryUsage);
               public MemoryUsage someOperation(String param1, MemoryUsage param2);
           }

      Then:

      - `proxy.getSimpleAttribute()` will result in a call to `mbs.``getAttribute``(name, "SimpleAttribute")`.

      - `proxy.setSimpleAttribute("whatever")` will result in a call to `mbs.``setAttribute``(name, new Attribute("SimpleAttribute", "whatever"))`.

        Because `String` is a simple type, in the sense of `SimpleType`, it is not changed in the context of an MXBean. The MXBean proxy behaves the same as a Standard MBean proxy (see `newMBeanProxy`) for the attribute `SimpleAttribute`.

      - `proxy.getMappedAttribute()` will result in a call to `mbs.getAttribute("MappedAttribute")`. The MXBean mapping rules mean that the actual type of the attribute `MappedAttribute` will be `CompositeData` and that is what the `mbs.getAttribute` call will return. The proxy will then convert the `CompositeData` back into the expected type `MemoryUsage` using the MXBean mapping rules.

      - Similarly, `proxy.setMappedAttribute(memoryUsage)` will convert the `MemoryUsage` argument into a `CompositeData` before calling `mbs.setAttribute`.

      - `proxy.someOperation("whatever", memoryUsage)` will convert the `MemoryUsage` argument into a `CompositeData` and call `mbs.invoke`. The value returned by `mbs.invoke` will be also be a `CompositeData`, and the proxy will convert this into the expected type `MemoryUsage` using the MXBean mapping rules.

      The object returned by this method is a `Proxy` whose `InvocationHandler` is an `MBeanServerInvocationHandler`.

      This method is equivalent to `newMXBeanProxy(connection, objectName, interfaceClass, false)`.

      Type Parameters:
        `T` - allows the compiler to know that if the `interfaceClass` parameter is `MyMXBean.class`, for example, then the return type is `MyMXBean`.
      Parameters:
        `connection` - the MBean server to forward to.
        `objectName` - the name of the MBean within `connection` to forward to.
        `interfaceClass` - the MXBean interface, which will also be implemented by the returned proxy.
      Returns:
        the new proxy instance.

    - #### newMXBeanProxy

          public static <T> T newMXBeanProxy(MBeanServerConnection connection,
                             ObjectName objectName,
                             Class<T> interfaceClass,
                             boolean notificationEmitter)

      Make a proxy for an MXBean in a local or remote MBean Server that may also support the methods of `NotificationEmitter`.

      This method behaves the same as `newMXBeanProxy(MBeanServerConnection, ObjectName, Class)`, but additionally, if `notificationEmitter` is `true`, then the MXBean is assumed to be a `NotificationBroadcaster` or `NotificationEmitter` and the returned proxy will implement `NotificationEmitter` as well as `interfaceClass`. A call to `NotificationBroadcaster.addNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)` on the proxy will result in a call to `MBeanServerConnection.addNotificationListener(ObjectName, NotificationListener, NotificationFilter, Object)`, and likewise for the other methods of `NotificationBroadcaster` and `NotificationEmitter`.

      Type Parameters:
        `T` - allows the compiler to know that if the `interfaceClass` parameter is `MyMXBean.class`, for example, then the return type is `MyMXBean`.
      Parameters:
        `connection` - the MBean server to forward to.
        `objectName` - the name of the MBean within `connection` to forward to.
        `interfaceClass` - the MXBean interface, which will also be implemented by the returned proxy.
        `notificationEmitter` - make the returned proxy implement `NotificationEmitter` by forwarding its methods via `connection`.
      Returns:
        the new proxy instance.

    - #### isMXBeanInterface

          public static boolean isMXBeanInterface(Class<?> interfaceClass)

      Test whether an interface is an MXBean interface. An interface is an MXBean interface if it is annotated `@MXBean` or `@MXBean(true)` or if it does not have an `@MXBean` annotation and its name ends with "`MXBean`".

      Parameters:
        `interfaceClass` - The candidate interface.
      Returns:
        true if `interfaceClass` is an interface and meets the conditions described.
      Throws:
        `NullPointerException` - if `interfaceClass` is null.

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