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Java Source Code / Java Documentation » JMX » XMOJO » javax.management.monitor   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    javax.management.NotificationBroadcasterSupport       javax.management.monitor.Monitor Monitor abstract public class Monitor extends NotificationBroadcasterSupport implements MonitorMBean,MBeanRegistration,Serializable(Code) This class is the base class for all types of monitor mbeans.Defines the common part to all monitor MBeans. Using Monitor MBeans, the observed attribute of another MBean (the observed MBean) is monitored at intervals specified by the granularity period. A gauge value (derived gauge) is derived from the values of the observed attribute. Field Summary protected static  int OBSERVED_ATTRIBUTE_ERROR_NOTIFIED      Flag denoting that a notification has occurred after changing the observed attribute. protected static  int OBSERVED_ATTRIBUTE_TYPE_ERROR_NOTIFIED      Flag denoting that a notification has occurred after changing the observed object or the observed attribute. protected static  int OBSERVED_OBJECT_ERROR_NOTIFIED      Flag denoting that a notification has occurred after changing the observed object or the observed attribute. protected static  int RESET_FLAGS_ALREADY_NOTIFIED      This flag is used to reset the alreadyNotified monitor attribute. protected static  int RUNTIME_ERROR_NOTIFIED      Flag denoting that a notification has occurred after changing the observed object or the observed attribute. protected  int alreadyNotified       String attributeName      Attribute to observe.  long derivedGaugeTimeStamp      protected  String dgbTag       long granularityPeriod      Monitor granularity period (in milliseconds).  boolean isActive      Monitor state.  ObjectName observedObject      Object to which the attribute to observe belongs to. protected  MBeanServer server      Reference on the MBean server. This reference is null when the monitor MBean is not registered in an MBean server. Constructor Summary public   Monitor()      Method Summary public  long getGranularityPeriod()      This method gets the granularity period (in milliseconds). public  MBeanNotificationInfo[] getNotificationInfo()      This method returns a NotificationInfo object containing the name of the Java class of the notification and the notification types sent by the counter monitor. public  String getObservedAttribute()      This method gets the name of the attribute being observed. public  ObjectName getObservedObject()      This method gets the object name of the object being observed. public  boolean isActive()      This method tests whether the monitor MBean is active. public  void postDeregister()      This method allows the monitor MBean to perform any operations needed after having been de-registered by the MBean server. public  void postRegister(Boolean registrationDone)      This method allows the monitor MBean to perform any operations needed after having been registered in the MBean server or after the registration has failed. public  void preDeregister()      This method allows the monitor MBean to perform any operations it needs before being de-registered by the MBean server. public  ObjectName preRegister(MBeanServer server, ObjectName name)      This method allows the monitor MBean to perform any operations it needs before being registered in the MBean server. Initializes the reference to the MBean server. Parameters:   server - - The MBean server in which the monitor MBean will be registered. Parameters:   name - - The object name of the monitor MBean. public  void setGranularityPeriod(long period)      This method sets the granularity period (in milliseconds). public  void setObservedAttribute(String attribute)      This method sets the attribute being observed. public  void setObservedObject(ObjectName object)      This method sets the object name of the object being observed. Parameters:   object - The ObjectName of the object to be observed. abstract public  void start()      This method starts the monitor. abstract public  void stop()      This method stops the monitor. Field Detail OBSERVED_ATTRIBUTE_ERROR_NOTIFIED protected static int OBSERVED_ATTRIBUTE_ERROR_NOTIFIED(Code) Flag denoting that a notification has occurred after changing the observed attribute. This flag is used to check that the new observed attribute belongs to the observed object at the time of the first notification. OBSERVED_ATTRIBUTE_TYPE_ERROR_NOTIFIED protected static int OBSERVED_ATTRIBUTE_TYPE_ERROR_NOTIFIED(Code) Flag denoting that a notification has occurred after changing the observed object or the observed attribute. This flag is used to check that the observed attribute type is correct (depending on the monitor in use) at the time of the first notification. OBSERVED_OBJECT_ERROR_NOTIFIED protected static int OBSERVED_OBJECT_ERROR_NOTIFIED(Code) Flag denoting that a notification has occurred after changing the observed object or the observed attribute. This flag is used to notify any exception (except the cases described above) when trying to get the value of the observed attribute at the time of the first notification. RESET_FLAGS_ALREADY_NOTIFIED protected static int RESET_FLAGS_ALREADY_NOTIFIED(Code) This flag is used to reset the alreadyNotified monitor attribute. RUNTIME_ERROR_NOTIFIED protected static int RUNTIME_ERROR_NOTIFIED(Code) Flag denoting that a notification has occurred after changing the observed object or the observed attribute. This flag is used to notify any exception (except the cases described above) when trying to get the value of the observed attribute at the time of the first notification. alreadyNotified protected int alreadyNotified(Code) Selected monitor errors that have already been notified attributeName String attributeName(Code) Attribute to observe. The default value is set to null. derivedGaugeTimeStamp long derivedGaugeTimeStamp(Code) dgbTag protected String dgbTag(Code) granularityPeriod long granularityPeriod(Code) Monitor granularity period (in milliseconds). isActive boolean isActive(Code) Monitor state. The default value is set to false. observedObject ObjectName observedObject(Code) Object to which the attribute to observe belongs to. The default value is set to null. server protected MBeanServer server(Code) Reference on the MBean server. This reference is null when the monitor MBean is not registered in an MBean server. This reference is initialized before the monitor MBean is registered in the MBean server. See Also:   Monitor.preRegister(MBeanServer server,ObjectName name) Constructor Detail Monitor public Monitor()(Code) Default constructor Method Detail getGranularityPeriod public long getGranularityPeriod()(Code) This method gets the granularity period (in milliseconds). long value representing the value of the granularity period(in milliseconds). getNotificationInfo public MBeanNotificationInfo[] getNotificationInfo()(Code) This method returns a NotificationInfo object containing the name of the Java class of the notification and the notification types sent by the counter monitor. An Array of MBeanNotificationInfo objects. getObservedAttribute public String getObservedAttribute()(Code) This method gets the name of the attribute being observed. String The name of the attribute that is being observed. getObservedObject public ObjectName getObservedObject()(Code) This method gets the object name of the object being observed. The ObjectName of the object being observed. isActive public boolean isActive()(Code) This method tests whether the monitor MBean is active. A monitor MBean is marked active when the start method is called. It becomes inactive when the stop method is called. boolean value indicating whether the MBean is active or not. postDeregister public void postDeregister()(Code) This method allows the monitor MBean to perform any operations needed after having been de-registered by the MBean server. Not used in this context. postRegister public void postRegister(Boolean registrationDone)(Code) This method allows the monitor MBean to perform any operations needed after having been registered in the MBean server or after the registration has failed. Not used in this context. preDeregister public void preDeregister() throws Exception(Code) This method allows the monitor MBean to perform any operations it needs before being de-registered by the MBean server. Stops the monitor. throws:   This - operation throws java.lang.Exception preRegister public ObjectName preRegister(MBeanServer server, ObjectName name) throws Exception(Code) This method allows the monitor MBean to perform any operations it needs before being registered in the MBean server. Initializes the reference to the MBean server. Parameters:   server - - The MBean server in which the monitor MBean will be registered. Parameters:   name - - The object name of the monitor MBean. This method allows the monitor MBean to perform any operationsit needs before being registered in the MBean server. - java.lang.Exception. setGranularityPeriod public void setGranularityPeriod(long period) throws IllegalArgumentException(Code) This method sets the granularity period (in milliseconds). The default value is one second. Parameters:   period - the granularity period value. exception:   java.lang.IllegalArgumentException - - The granularity periodis less than or equal to zero. setObservedAttribute public void setObservedAttribute(String attribute) throws IllegalArgumentException(Code) This method sets the attribute being observed. Parameters:   attribute - The attribute to be observed. setObservedObject public void setObservedObject(ObjectName object) throws IllegalArgumentException(Code) This method sets the object name of the object being observed. Parameters:   object - The ObjectName of the object to be observed. IllegalArgumentException. start abstract public void start()(Code) This method starts the monitor. stop abstract public void stop()(Code) This method stops the monitor. Methods inherited from javax.management.NotificationBroadcasterSupport public void addNotificationListener(NotificationListener listener, NotificationFilter filter, Object handback)(Code)(Java Doc) public MBeanNotificationInfo[] getNotificationInfo()(Code)(Java Doc) public void removeNotificationListener(NotificationListener listener) throws ListenerNotFoundException(Code)(Java Doc) public void sendNotification(Notification notif)(Code)(Java Doc) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)