javax.management

## Class MBeanServerDelegate

- java.lang.Object
- - javax.management.MBeanServerDelegate

- All Implemented Interfaces:
    MBeanServerDelegateMBean, NotificationBroadcaster, NotificationEmitter

      public class MBeanServerDelegate
      extends Object
      implements MBeanServerDelegateMBean, NotificationEmitter

  Represents the MBean server from the management point of view. The MBeanServerDelegate MBean emits the MBeanServerNotifications when an MBean is registered/unregistered in the MBean server.
  Since:
    1.5

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static ObjectName` | `DELEGATE_NAME` Defines the default ObjectName of the MBeanServerDelegate.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `MBeanServerDelegate()` Create a MBeanServerDelegate object.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addNotificationListener(NotificationListener listener, NotificationFilter filter, Object handback)` Adds a listener to this MBean.
    `String` | `getImplementationName()` Returns the JMX implementation name (the name of this product).
    `String` | `getImplementationVendor()` Returns the JMX implementation vendor (the vendor of this product).
    `String` | `getImplementationVersion()` Returns the JMX implementation version (the version of this product).
    `String` | `getMBeanServerId()` Returns the MBean server agent identity.
    `MBeanNotificationInfo[]` | `getNotificationInfo()` Returns an array indicating, for each notification this MBean may send, the name of the Java class of the notification and the notification type.
    `String` | `getSpecificationName()` Returns the full name of the JMX specification implemented by this product.
    `String` | `getSpecificationVendor()` Returns the vendor of the JMX specification implemented by this product.
    `String` | `getSpecificationVersion()` Returns the version of the JMX specification implemented by this product.
    `void` | `removeNotificationListener(NotificationListener listener)` Removes a listener from this MBean.
    `void` | `removeNotificationListener(NotificationListener listener, NotificationFilter filter, Object handback)` Removes a listener from this MBean.
    `void` | `sendNotification(Notification notification)` Enables the MBean server to send a notification.

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

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

- - ### Field Detail

    - #### DELEGATE_NAME

          public static final ObjectName DELEGATE_NAME

      Defines the default ObjectName of the MBeanServerDelegate.
      Since:
        1.6

  - ### Constructor Detail

    - #### MBeanServerDelegate

          public MBeanServerDelegate()

      Create a MBeanServerDelegate object.

  - ### Method Detail

    - #### getMBeanServerId

          public String getMBeanServerId()

      Returns the MBean server agent identity.
      Specified by:
        `getMBeanServerId` in interface `MBeanServerDelegateMBean`
      Returns:
        the identity.

    - #### getSpecificationName

          public String getSpecificationName()

      Returns the full name of the JMX specification implemented by this product.
      Specified by:
        `getSpecificationName` in interface `MBeanServerDelegateMBean`
      Returns:
        the specification name.

    - #### getSpecificationVersion

          public String getSpecificationVersion()

      Returns the version of the JMX specification implemented by this product.
      Specified by:
        `getSpecificationVersion` in interface `MBeanServerDelegateMBean`
      Returns:
        the specification version.

    - #### getSpecificationVendor

          public String getSpecificationVendor()

      Returns the vendor of the JMX specification implemented by this product.
      Specified by:
        `getSpecificationVendor` in interface `MBeanServerDelegateMBean`
      Returns:
        the specification vendor.

    - #### getImplementationName

          public String getImplementationName()

      Returns the JMX implementation name (the name of this product).
      Specified by:
        `getImplementationName` in interface `MBeanServerDelegateMBean`
      Returns:
        the implementation name.

    - #### getImplementationVersion

          public String getImplementationVersion()

      Returns the JMX implementation version (the version of this product).
      Specified by:
        `getImplementationVersion` in interface `MBeanServerDelegateMBean`
      Returns:
        the implementation version.

    - #### getImplementationVendor

          public String getImplementationVendor()

      Returns the JMX implementation vendor (the vendor of this product).
      Specified by:
        `getImplementationVendor` in interface `MBeanServerDelegateMBean`
      Returns:
        the implementation vendor.

    - #### getNotificationInfo

          public MBeanNotificationInfo[] getNotificationInfo()

      Description copied from interface: `NotificationBroadcaster`

      Returns an array indicating, for each notification this MBean may send, the name of the Java class of the notification and the notification type.

      It is not illegal for the MBean to send notifications not described in this array. However, some clients of the MBean server may depend on the array being complete for their correct functioning.

      Specified by:
        `getNotificationInfo` in interface `NotificationBroadcaster`
      Returns:
        the array of possible notifications.

    - #### addNotificationListener

          public void addNotificationListener(NotificationListener listener,
                                     NotificationFilter filter,
                                     Object handback)
                                       throws IllegalArgumentException

      Description copied from interface: `NotificationBroadcaster`
      Adds a listener to this MBean.
      Specified by:
        `addNotificationListener` in interface `NotificationBroadcaster`
      Parameters:
        `listener` - The listener object which will handle the notifications emitted by the broadcaster.
        `filter` - The filter object. If filter is null, no filtering will be performed before handling notifications.
        `handback` - An opaque object to be sent back to the listener when a notification is emitted. This object cannot be used by the Notification broadcaster object. It should be resent unchanged with the notification to the listener.
      Throws:
        `IllegalArgumentException` - Listener parameter is null.
      See Also:
        `NotificationBroadcaster.removeNotificationListener(javax.management.NotificationListener)`

    - #### removeNotificationListener

          public void removeNotificationListener(NotificationListener listener,
                                        NotificationFilter filter,
                                        Object handback)
                                          throws ListenerNotFoundException

      Description copied from interface: `NotificationEmitter`

      Removes a listener from this MBean. The MBean must have a listener that exactly matches the given `listener`, `filter`, and `handback` parameters. If there is more than one such listener, only one is removed.

      The `filter` and `handback` parameters may be null if and only if they are null in a listener to be removed.

      Specified by:
        `removeNotificationListener` in interface `NotificationEmitter`
      Parameters:
        `listener` - A listener that was previously added to this MBean.
        `filter` - The filter that was specified when the listener was added.
        `handback` - The handback that was specified when the listener was added.
      Throws:
        `ListenerNotFoundException` - The listener is not registered with the MBean, or it is not registered with the given filter and handback.

    - #### removeNotificationListener

          public void removeNotificationListener(NotificationListener listener)
                                          throws ListenerNotFoundException

      Description copied from interface: `NotificationBroadcaster`
      Removes a listener from this MBean. If the listener has been registered with different handback objects or notification filters, all entries corresponding to the listener will be removed.
      Specified by:
        `removeNotificationListener` in interface `NotificationBroadcaster`
      Parameters:
        `listener` - A listener that was previously added to this MBean.
      Throws:
        `ListenerNotFoundException` - The listener is not registered with the MBean.
      See Also:
        `NotificationBroadcaster.addNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)`, `NotificationEmitter.removeNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)`

    - #### sendNotification

          public void sendNotification(Notification notification)

      Enables the MBean server to send a notification. If the passed notification has a sequence number lesser or equal to 0, then replace it with the delegate's own sequence number.
      Parameters:
        `notification` - The notification to send.

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