Class NotificationFilterSupport

java.lang.Object
javax.management.NotificationFilterSupport
All Implemented Interfaces:
Serializable, NotificationFilter
Direct Known Subclasses:
MBeanServerNotificationFilter
public class NotificationFilterSupport extends Object implements NotificationFilter
Provides an implementation of the NotificationFilter interface. The filtering is performed on the notification type attribute.

Manages a list of enabled notification types. A method allows users to enable/disable as many notification types as required.

Then, before sending a notification to a listener registered with a filter, the notification broadcaster compares this notification type with all notification types enabled by the filter. The notification will be sent to the listener only if its filter enables this notification type.

Example: 

NotificationFilterSupport myFilter = new NotificationFilterSupport();
myFilter.enableType("my_example.my_type");
myBroadcaster.addListener(myListener, myFilter, null);
The listener myListener will only receive notifications the type of which equals/starts with "my_example.my_type".
Since:
1.5
See Also:

  • Constructor Summary

    Constructors
    Constructor
    Description
    NotificationFilterSupport()
    Constructs a NotificationFilterSupport.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    disableAllTypes()
    Disables all notification types.
    void
    disableType(String prefix)
    Removes the given prefix from the prefix list.
    void
    enableType(String prefix)
    Enables all the notifications the type of which starts with the specified prefix to be sent to the listener.
    Vector<String>
    getEnabledTypes()
    Gets all the enabled notification types for this filter.
    boolean
    isNotificationEnabled(Notification notification)
    Invoked before sending the specified notification to the listener.

    Methods declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    String
    toString()
    Answers a string containing a concise, human-readable description of the receiver.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • Constructor Details

    • NotificationFilterSupport

      public NotificationFilterSupport()
      Constructs a NotificationFilterSupport.

  • Method Details

    • isNotificationEnabled

      public boolean isNotificationEnabled(Notification notification)
      Invoked before sending the specified notification to the listener.
      This filter compares the type of the specified notification with each enabled type. If the notification type matches one of the enabled types, the notification should be sent to the listener and this method returns true.
      Specified by:
      isNotificationEnabled in interface NotificationFilter
      Parameters:
      notification - The notification to be sent.
      Returns:
      true if the notification should be sent to the listener, false otherwise.

    • enableType

      public void enableType(String prefix) throws IllegalArgumentException
      Enables all the notifications the type of which starts with the specified prefix to be sent to the listener.
      If the specified prefix is already in the list of enabled notification types, this method has no effect.

      Example: 

      // Enables all notifications the type of which starts with "my_example" to be sent.
myFilter.enableType("my_example");
// Enables all notifications the type of which is "my_example.my_type" to be sent.
myFilter.enableType("my_example.my_type");
      Note that:
      myFilter.enableType("my_example.*");
      will no match any notification type.
      Parameters:
      prefix - The prefix.
      Throws:
      IllegalArgumentException - The prefix parameter is null.

    • disableType

      public void disableType(String prefix)
      Removes the given prefix from the prefix list.
      If the specified prefix is not in the list of enabled notification types, this method has no effect.
      Parameters:
      prefix - The prefix.

    • disableAllTypes

      public void disableAllTypes()
      Disables all notification types.

    • getEnabledTypes

      public Vector<String> getEnabledTypes()
      Gets all the enabled notification types for this filter.
      Returns:
      The list containing all the enabled notification types.