Package org.apache.commons.modeler

Class BaseModelMBean

  • All Implemented Interfaces:
    javax.management.DynamicMBean, javax.management.MBeanRegistration, javax.management.modelmbean.ModelMBean, javax.management.modelmbean.ModelMBeanNotificationBroadcaster, javax.management.NotificationBroadcaster, javax.management.PersistentMBean
    Direct Known Subclasses:
    JndiJmx, MBeanProxy
    public class BaseModelMBean
extends java.lang.Object
implements javax.management.modelmbean.ModelMBean, javax.management.MBeanRegistration

    Basic implementation of the ModelMBean interface, which supports the minimal requirements of the interface contract.

    This can be used directly to wrap an existing java bean, or inside an mlet or anywhere an MBean would be used. The String parameter passed to the constructor will be used to construct an instance of the real object that we wrap. Limitations:

    • Only managed resources of type objectReference are supportd.
    • Caching of attribute values and operation results is not supported. All calls to invoke() are immediately executed.
    • Logging (under control of descriptors) is not supported.
    • Persistence of MBean attributes and operations is not supported.
    • All classes referenced as attribute types, operation parameters, or operation return values must be one of the following:
      • One of the Java primitive types (boolean, byte, char, double, float, integer, long, short). Corresponding value will be wrapped in the appropriate wrapper class automatically.
      • Operations that return no value should declare a return type of void.
    • Attribute caching is not supported
    Version:
    $Revision: 480402 $ $Date: 2006-11-29 04:43:23 +0000 (Wed, 29 Nov 2006) $
    Author:
    Craig R. McClanahan, Costin Manolache

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description
      (package private) static class  BaseModelMBean.MethodKey  

    • Constructor Summary

      Constructors 
      Constructor Description
      BaseModelMBean()
      Construct a ModelMBean with default ModelMBeanInfo information.
      BaseModelMBean​(java.lang.String type)
      Construct a ModelMBean of a specified type.
      BaseModelMBean​(java.lang.String type, ModelerSource source)  
      BaseModelMBean​(javax.management.modelmbean.ModelMBeanInfo info)
      Construct a ModelMBean associated with the specified ModelMBeanInfo information.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void addAttributeChangeNotificationListener​(javax.management.NotificationListener listener, java.lang.String name, java.lang.Object handback)
      Add an attribute change notification event listener to this MBean.
      void addNotificationListener​(javax.management.NotificationListener listener, javax.management.NotificationFilter filter, java.lang.Object handback)
      Add a notification event listener to this MBean.
      protected javax.management.modelmbean.ModelMBeanInfo createDefaultModelMBeanInfo()
      Create and return a default ModelMBeanInfo object.
      protected void createResource()
      Set the type of the mbean.
      java.lang.Object getAttribute​(java.lang.String name)
      Obtain and return the value of a specific attribute of this MBean.
      private java.lang.Class getAttributeClass​(java.lang.String signature)  
      javax.management.AttributeList getAttributes​(java.lang.String[] names)
      Obtain and return the values of several attributes of this MBean.
      java.lang.String getClassName()  
      javax.management.ObjectName getJmxName()  
      java.lang.Object getManagedResource()
      Get the instance handle of the object against which we execute all methods in this ModelMBean management interface.
      javax.management.MBeanInfo getMBeanInfo()
      Return the MBeanInfo object for this MBean.
      java.lang.String getModelerType()  
      javax.management.MBeanNotificationInfo[] getNotificationInfo()
      Return an MBeanNotificationInfo object describing the notifications sent by this MBean.
      java.lang.String getObjectName()  
      Registry getRegistry()  
      protected void initModelInfo​(java.lang.String type)
      Set the type of the mbean.
      java.lang.Object invoke​(java.lang.String name, java.lang.Object[] params, java.lang.String[] signature)
      Invoke a particular method on this MBean, and return any returned value.
      protected boolean isModelMBeanInfoValid​(javax.management.modelmbean.ModelMBeanInfo info)
      Is the specified ModelMBeanInfo instance valid?
      void load()
      Instantiates this MBean instance from data found in the persistent store.
      void postDeregister()  
      void postRegister​(java.lang.Boolean registrationDone)  
      void preDeregister()  
      javax.management.ObjectName preRegister​(javax.management.MBeanServer server, javax.management.ObjectName name)  
      void removeAttributeChangeNotificationListener​(javax.management.NotificationListener listener, java.lang.String name)
      Remove an attribute change notification event listener from this MBean.
      void removeAttributeChangeNotificationListener​(javax.management.NotificationListener listener, java.lang.String attributeName, java.lang.Object handback)
      Remove an attribute change notification event listener from this MBean.
      void removeNotificationListener​(javax.management.NotificationListener listener)
      Remove a notification event listener from this MBean.
      void removeNotificationListener​(javax.management.NotificationListener listener, java.lang.Object handback)
      Remove a notification event listener from this MBean.
      void removeNotificationListener​(javax.management.NotificationListener listener, javax.management.NotificationFilter filter, java.lang.Object handback)
      Remove a notification event listener from this MBean.
      void sendAttributeChangeNotification​(javax.management.AttributeChangeNotification notification)
      Send an AttributeChangeNotification to all registered listeners.
      void sendAttributeChangeNotification​(javax.management.Attribute oldValue, javax.management.Attribute newValue)
      Send an AttributeChangeNotification to all registered listeners.
      void sendNotification​(java.lang.String message)
      Send a Notification which contains the specified string as a jmx.modelmbean.generic notification.
      void sendNotification​(javax.management.Notification notification)
      Send a Notification to all registered listeners as a jmx.modelmbean.general notification.
      void setAttribute​(javax.management.Attribute attribute)
      Set the value of a specific attribute of this MBean.
      javax.management.AttributeList setAttributes​(javax.management.AttributeList attributes)
      Set the values of several attributes of this MBean.
      void setManagedResource​(java.lang.Object resource, java.lang.String type)
      Set the instance handle of the object against which we will execute all methods in this ModelMBean management interface.
      void setModeledType​(java.lang.String type)
      Set the type of the mbean.
      void setModelMBeanInfo​(javax.management.modelmbean.ModelMBeanInfo info)
      Initialize the ModelMBeanInfo associated with this ModelMBean.
      void setRegistry​(Registry registry)  
      void store()
      Capture the current state of this MBean instance and write it out to the persistent store.
      java.lang.String toString()  

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • log

        private static org.apache.commons.logging.Log log

      • registry

        protected Registry registry
        Registry we are associated with

      • oname

        protected javax.management.ObjectName oname

      • info

        protected javax.management.modelmbean.ModelMBeanInfo info
        The ModelMBeanInfo object that controls our activity.

      • resource

        protected java.lang.Object resource
        The managed resource this MBean is associated with (if any).

      • resourceType

        protected java.lang.String resourceType

      • source

        protected ModelerSource source
        Source object used to read this mbean. Can be used to persist the mbean

      • attributes

        protected java.util.HashMap attributes
        Attribute values. XXX That can be stored in the value Field

      • NO_ARGS_PARAM

        static final java.lang.Object[] NO_ARGS_PARAM

      • NO_ARGS_PARAM_SIG

        static final java.lang.Class[] NO_ARGS_PARAM_SIG

      • getAttMap

        private java.util.Hashtable getAttMap

      • setAttMap

        private java.util.Hashtable setAttMap

      • invokeAttMap

        private java.util.Hashtable invokeAttMap

    • Constructor Detail

      • BaseModelMBean

        public BaseModelMBean()
               throws javax.management.MBeanException,
                      javax.management.RuntimeOperationsException
        Construct a ModelMBean with default ModelMBeanInfo information.
        Throws:
        javax.management.MBeanException - if the initializer of an object throws an exception
        javax.management.RuntimeOperationsException - if an IllegalArgumentException occurs

      • BaseModelMBean

        public BaseModelMBean​(javax.management.modelmbean.ModelMBeanInfo info)
               throws javax.management.MBeanException,
                      javax.management.RuntimeOperationsException
        Construct a ModelMBean associated with the specified ModelMBeanInfo information.
        Parameters:
        info - ModelMBeanInfo for this MBean
        Throws:
        javax.management.MBeanException - if the initializer of an object throws an exception
        javax.management.RuntimeOperationsException - if an IllegalArgumentException occurs

      • BaseModelMBean

        public BaseModelMBean​(java.lang.String type)
               throws javax.management.MBeanException,
                      javax.management.RuntimeOperationsException
        Construct a ModelMBean of a specified type. The type can be a class name or the key used in one of the descriptors. If no descriptor is available, we'll first try to locate one in the same package with the class, then use introspection. The mbean resource will be created.
        Parameters:
        type - Class name or the type key used in the descriptor.
        Throws:
        javax.management.MBeanException
        javax.management.RuntimeOperationsException

      • BaseModelMBean

        public BaseModelMBean​(java.lang.String type,
                      ModelerSource source)
               throws javax.management.MBeanException,
                      javax.management.RuntimeOperationsException
        Throws:
        javax.management.MBeanException
        javax.management.RuntimeOperationsException

    • Method Detail

      • getAttribute

        public java.lang.Object getAttribute​(java.lang.String name)
                              throws javax.management.AttributeNotFoundException,
                                     javax.management.MBeanException,
                                     javax.management.ReflectionException
        Obtain and return the value of a specific attribute of this MBean.
        Specified by:
        getAttribute in interface javax.management.DynamicMBean
        Parameters:
        name - Name of the requested attribute
        Throws:
        javax.management.AttributeNotFoundException - if this attribute is not supported by this MBean
        javax.management.MBeanException - if the initializer of an object throws an exception
        javax.management.ReflectionException - if a Java reflection exception occurs when invoking the getter

      • getAttributes

        public javax.management.AttributeList getAttributes​(java.lang.String[] names)
        Obtain and return the values of several attributes of this MBean.
        Specified by:
        getAttributes in interface javax.management.DynamicMBean
        Parameters:
        names - Names of the requested attributes

      • getMBeanInfo

        public javax.management.MBeanInfo getMBeanInfo()
        Return the MBeanInfo object for this MBean.
        Specified by:
        getMBeanInfo in interface javax.management.DynamicMBean

      • invoke

        public java.lang.Object invoke​(java.lang.String name,
                               java.lang.Object[] params,
                               java.lang.String[] signature)
                        throws javax.management.MBeanException,
                               javax.management.ReflectionException
        Invoke a particular method on this MBean, and return any returned value.

        IMPLEMENTATION NOTE - This implementation will attempt to invoke this method on the MBean itself, or (if not available) on the managed resource object associated with this MBean.

        Specified by:
        invoke in interface javax.management.DynamicMBean
        Parameters:
        name - Name of the operation to be invoked
        params - Array containing the method parameters of this operation
        signature - Array containing the class names representing the signature of this operation
        Throws:
        javax.management.MBeanException - if the initializer of an object throws an exception
        ReflectioNException - if a Java reflection exception occurs when invoking a method
        javax.management.ReflectionException

      • getAttributeClass

        private java.lang.Class getAttributeClass​(java.lang.String signature)
                                   throws javax.management.ReflectionException
        Throws:
        javax.management.ReflectionException

      • setAttribute

        public void setAttribute​(javax.management.Attribute attribute)
                  throws javax.management.AttributeNotFoundException,
                         javax.management.MBeanException,
                         javax.management.ReflectionException
        Set the value of a specific attribute of this MBean.
        Specified by:
        setAttribute in interface javax.management.DynamicMBean
        Parameters:
        attribute - The identification of the attribute to be set and the new value
        Throws:
        javax.management.AttributeNotFoundException - if this attribute is not supported by this MBean
        javax.management.MBeanException - if the initializer of an object throws an exception
        javax.management.ReflectionException - if a Java reflection exception occurs when invoking the getter

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object

      • setAttributes

        public javax.management.AttributeList setAttributes​(javax.management.AttributeList attributes)
        Set the values of several attributes of this MBean.
        Specified by:
        setAttributes in interface javax.management.DynamicMBean
        Parameters:
        attributes - THe names and values to be set
        Returns:
        The list of attributes that were set and their new values

      • getManagedResource

        public java.lang.Object getManagedResource()
                                    throws javax.management.InstanceNotFoundException,
                                           javax.management.modelmbean.InvalidTargetObjectTypeException,
                                           javax.management.MBeanException,
                                           javax.management.RuntimeOperationsException
        Get the instance handle of the object against which we execute all methods in this ModelMBean management interface.
        Throws:
        javax.management.InstanceNotFoundException - if the managed resource object cannot be found
        javax.management.MBeanException - if the initializer of the object throws an exception
        javax.management.RuntimeOperationsException - if the managed resource or the resource type is null or invalid
        javax.management.modelmbean.InvalidTargetObjectTypeException

      • setManagedResource

        public void setManagedResource​(java.lang.Object resource,
                               java.lang.String type)
                        throws javax.management.InstanceNotFoundException,
                               javax.management.modelmbean.InvalidTargetObjectTypeException,
                               javax.management.MBeanException,
                               javax.management.RuntimeOperationsException
        Set the instance handle of the object against which we will execute all methods in this ModelMBean management interface. This method will detect and call "setModelMbean" method. A resource can implement this method to get a reference to the model mbean. The reference can be used to send notification and access the registry.
        Specified by:
        setManagedResource in interface javax.management.modelmbean.ModelMBean
        Parameters:
        resource - The resource object to be managed
        type - The type of reference for the managed resource ("ObjectReference", "Handle", "IOR", "EJBHandle", or "RMIReference")
        Throws:
        javax.management.InstanceNotFoundException - if the managed resource object cannot be found
        javax.management.modelmbean.InvalidTargetObjectTypeException - if this ModelMBean is asked to handle a reference type it cannot deal with
        javax.management.MBeanException - if the initializer of the object throws an exception
        javax.management.RuntimeOperationsException - if the managed resource or the resource type is null or invalid

      • setModelMBeanInfo

        public void setModelMBeanInfo​(javax.management.modelmbean.ModelMBeanInfo info)
                       throws javax.management.MBeanException,
                              javax.management.RuntimeOperationsException
        Initialize the ModelMBeanInfo associated with this ModelMBean. After the information and associated descriptors have been customized, the ModelMBean should be registered with the associated MBeanServer. Currently the model can be set after registration. This behavior is deprecated and won't be supported in future versions.
        Specified by:
        setModelMBeanInfo in interface javax.management.modelmbean.ModelMBean
        Parameters:
        info - The ModelMBeanInfo object to be used by this ModelMBean
        Throws:
        javax.management.MBeanException - If an exception occurs recording this ModelMBeanInfo information
        RuntimeOperations - if the specified parameter is null or invalid
        javax.management.RuntimeOperationsException

      • addAttributeChangeNotificationListener

        public void addAttributeChangeNotificationListener​(javax.management.NotificationListener listener,
                                                   java.lang.String name,
                                                   java.lang.Object handback)
                                            throws java.lang.IllegalArgumentException
        Add an attribute change notification event listener to this MBean.
        Specified by:
        addAttributeChangeNotificationListener in interface javax.management.modelmbean.ModelMBeanNotificationBroadcaster
        Parameters:
        listener - Listener that will receive event notifications
        name - Name of the attribute of interest, or null to indicate interest in all attributes
        handback - Handback object to be sent along with event notifications
        Throws:
        java.lang.IllegalArgumentException - if the listener parameter is null

      • removeAttributeChangeNotificationListener

        public void removeAttributeChangeNotificationListener​(javax.management.NotificationListener listener,
                                                      java.lang.String name)
                                               throws javax.management.ListenerNotFoundException
        Remove an attribute change notification event listener from this MBean.
        Specified by:
        removeAttributeChangeNotificationListener in interface javax.management.modelmbean.ModelMBeanNotificationBroadcaster
        Parameters:
        listener - The listener to be removed
        name - The attribute name for which no more events are required
        Throws:
        javax.management.ListenerNotFoundException - if this listener is not registered in the MBean

      • removeAttributeChangeNotificationListener

        public void removeAttributeChangeNotificationListener​(javax.management.NotificationListener listener,
                                                      java.lang.String attributeName,
                                                      java.lang.Object handback)
                                               throws javax.management.ListenerNotFoundException
        Remove an attribute change notification event listener from this MBean.
        Parameters:
        listener - The listener to be removed
        attributeName - The attribute name for which no more events are required
        handback - Handback object to be sent along with event notifications
        Throws:
        javax.management.ListenerNotFoundException - if this listener is not registered in the MBean

      • sendAttributeChangeNotification

        public void sendAttributeChangeNotification​(javax.management.AttributeChangeNotification notification)
                                     throws javax.management.MBeanException,
                                            javax.management.RuntimeOperationsException
        Send an AttributeChangeNotification to all registered listeners.
        Specified by:
        sendAttributeChangeNotification in interface javax.management.modelmbean.ModelMBeanNotificationBroadcaster
        Parameters:
        notification - The AttributeChangeNotification that will be passed
        Throws:
        javax.management.MBeanException - if an object initializer throws an exception
        javax.management.RuntimeOperationsException - wraps IllegalArgumentException when the specified notification is null or invalid

      • sendAttributeChangeNotification

        public void sendAttributeChangeNotification​(javax.management.Attribute oldValue,
                                            javax.management.Attribute newValue)
                                     throws javax.management.MBeanException,
                                            javax.management.RuntimeOperationsException
        Send an AttributeChangeNotification to all registered listeners.
        Specified by:
        sendAttributeChangeNotification in interface javax.management.modelmbean.ModelMBeanNotificationBroadcaster
        Parameters:
        oldValue - The original value of the Attribute
        newValue - The new value of the Attribute
        Throws:
        javax.management.MBeanException - if an object initializer throws an exception
        javax.management.RuntimeOperationsException - wraps IllegalArgumentException when the specified notification is null or invalid

      • sendNotification

        public void sendNotification​(javax.management.Notification notification)
                      throws javax.management.MBeanException,
                             javax.management.RuntimeOperationsException
        Send a Notification to all registered listeners as a jmx.modelmbean.general notification.
        Specified by:
        sendNotification in interface javax.management.modelmbean.ModelMBeanNotificationBroadcaster
        Parameters:
        notification - The Notification that will be passed
        Throws:
        javax.management.MBeanException - if an object initializer throws an exception
        javax.management.RuntimeOperationsException - wraps IllegalArgumentException when the specified notification is null or invalid

      • sendNotification

        public void sendNotification​(java.lang.String message)
                      throws javax.management.MBeanException,
                             javax.management.RuntimeOperationsException
        Send a Notification which contains the specified string as a jmx.modelmbean.generic notification.
        Specified by:
        sendNotification in interface javax.management.modelmbean.ModelMBeanNotificationBroadcaster
        Parameters:
        message - The message string to be passed
        Throws:
        javax.management.MBeanException - if an object initializer throws an exception
        javax.management.RuntimeOperationsException - wraps IllegalArgumentException when the specified notification is null or invalid

      • addNotificationListener

        public void addNotificationListener​(javax.management.NotificationListener listener,
                                    javax.management.NotificationFilter filter,
                                    java.lang.Object handback)
                             throws java.lang.IllegalArgumentException
        Add a notification event listener to this MBean.
        Specified by:
        addNotificationListener in interface javax.management.NotificationBroadcaster
        Parameters:
        listener - Listener that will receive event notifications
        filter - Filter object used to filter event notifications actually delivered, or null for no filtering
        handback - Handback object to be sent along with event notifications
        Throws:
        java.lang.IllegalArgumentException - if the listener parameter is null

      • getNotificationInfo

        public javax.management.MBeanNotificationInfo[] getNotificationInfo()
        Return an MBeanNotificationInfo object describing the notifications sent by this MBean.
        Specified by:
        getNotificationInfo in interface javax.management.NotificationBroadcaster

      • removeNotificationListener

        public void removeNotificationListener​(javax.management.NotificationListener listener)
                                throws javax.management.ListenerNotFoundException
        Remove a notification event listener from this MBean.
        Specified by:
        removeNotificationListener in interface javax.management.NotificationBroadcaster
        Parameters:
        listener - The listener to be removed (any and all registrations for this listener will be eliminated)
        Throws:
        javax.management.ListenerNotFoundException - if this listener is not registered in the MBean

      • removeNotificationListener

        public void removeNotificationListener​(javax.management.NotificationListener listener,
                                       java.lang.Object handback)
                                throws javax.management.ListenerNotFoundException
        Remove a notification event listener from this MBean.
        Parameters:
        listener - The listener to be removed (any and all registrations for this listener will be eliminated)
        handback - Handback object to be sent along with event notifications
        Throws:
        javax.management.ListenerNotFoundException - if this listener is not registered in the MBean

      • removeNotificationListener

        public void removeNotificationListener​(javax.management.NotificationListener listener,
                                       javax.management.NotificationFilter filter,
                                       java.lang.Object handback)
                                throws javax.management.ListenerNotFoundException
        Remove a notification event listener from this MBean.
        Parameters:
        listener - The listener to be removed (any and all registrations for this listener will be eliminated)
        filter - Filter object used to filter event notifications actually delivered, or null for no filtering
        handback - Handback object to be sent along with event notifications
        Throws:
        javax.management.ListenerNotFoundException - if this listener is not registered in the MBean

      • load

        public void load()
          throws javax.management.InstanceNotFoundException,
                 javax.management.MBeanException,
                 javax.management.RuntimeOperationsException
        Instantiates this MBean instance from data found in the persistent store. The data loaded could include attribute and operation values. This method should be called during construction or initialization of the instance, and before the MBean is registered with the MBeanServer.

        IMPLEMENTATION NOTE - This implementation does not support persistence.

        Specified by:
        load in interface javax.management.PersistentMBean
        Throws:
        javax.management.InstanceNotFoundException - if the managed resource object cannot be found
        javax.management.MBeanException - if the initializer of the object throws an exception
        javax.management.RuntimeOperationsException - if an exception is reported by the persistence mechanism

      • store

        public void store()
           throws javax.management.InstanceNotFoundException,
                  javax.management.MBeanException,
                  javax.management.RuntimeOperationsException
        Capture the current state of this MBean instance and write it out to the persistent store. The state stored could include attribute and operation values. If one of these methods of persistence is not supported, a "service not found" exception will be thrown.

        IMPLEMENTATION NOTE - This implementation does not support persistence.

        Specified by:
        store in interface javax.management.PersistentMBean
        Throws:
        javax.management.InstanceNotFoundException - if the managed resource object cannot be found
        javax.management.MBeanException - if the initializer of the object throws an exception, or persistence is not supported
        javax.management.RuntimeOperationsException - if an exception is reported by the persistence mechanism

      • setModeledType

        public void setModeledType​(java.lang.String type)
        Set the type of the mbean. This is used as a key to locate the description in the Registry.
        Parameters:
        type - the type of classname of the modeled object

      • initModelInfo

        protected void initModelInfo​(java.lang.String type)
        Set the type of the mbean. This is used as a key to locate the description in the Registry.
        Parameters:
        type - the type of classname of the modeled object

      • createResource

        protected void createResource()
        Set the type of the mbean. This is used as a key to locate the description in the Registry.

      • getModelerType

        public java.lang.String getModelerType()

      • getClassName

        public java.lang.String getClassName()

      • getJmxName

        public javax.management.ObjectName getJmxName()

      • getObjectName

        public java.lang.String getObjectName()

      • setRegistry

        public void setRegistry​(Registry registry)

      • getRegistry

        public Registry getRegistry()

      • createDefaultModelMBeanInfo

        protected javax.management.modelmbean.ModelMBeanInfo createDefaultModelMBeanInfo()
        Create and return a default ModelMBeanInfo object.

      • isModelMBeanInfoValid

        protected boolean isModelMBeanInfoValid​(javax.management.modelmbean.ModelMBeanInfo info)
        Is the specified ModelMBeanInfo instance valid?

        IMPLEMENTATION NOTE - This implementation does not check anything, but this method can be overridden as required.

        Parameters:
        info - The ModelMBeanInfo object to check

      • preRegister

        public javax.management.ObjectName preRegister​(javax.management.MBeanServer server,
                                               javax.management.ObjectName name)
                                        throws java.lang.Exception
        Specified by:
        preRegister in interface javax.management.MBeanRegistration
        Throws:
        java.lang.Exception

      • postRegister

        public void postRegister​(java.lang.Boolean registrationDone)
        Specified by:
        postRegister in interface javax.management.MBeanRegistration

      • preDeregister

        public void preDeregister()
                   throws java.lang.Exception
        Specified by:
        preDeregister in interface javax.management.MBeanRegistration
        Throws:
        java.lang.Exception

      • postDeregister

        public void postDeregister()
        Specified by:
        postDeregister in interface javax.management.MBeanRegistration