org.apache.jackrabbit.commons.observation

Class ListenerTracker

java.lang.Object

org.apache.jackrabbit.commons.observation.ListenerTracker

public class ListenerTracker
extends Object

Tracks event deliveries to an event listener and the way the listener processes the events. The collected information is made available through the EventListenerMBean interface.

Constructor Summary

Constructors

Constructor and Description
ListenerTracker(EventListener listener, int eventTypes, String absPath, boolean isDeep, String[] uuid, String[] nodeTypeName, boolean noLocal)

Method Summary

Modifier and Type	Method and Description
EventListenerMBean	getListenerMBean()
EventListener	getTrackedListener()
void	recordOneSecond() Records the number of measured values over the past second and resets the counter.
void	recordProducerTime(long time, TimeUnit unit) Record additional producer time spent outside of the listeners, e.g.
void	recordQueueLength(long length) Applications should call this to report the current queue length.
void	recordQueueLength(long length, long headTimestamp) Applications should call this to report the current queue length when an item is removed from the queue.
String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ListenerTracker

public ListenerTracker(EventListener listener,
                       int eventTypes,
                       String absPath,
                       boolean isDeep,
                       String[] uuid,
                       String[] nodeTypeName,
                       boolean noLocal)

Method Detail

recordQueueLength

public void recordQueueLength(long length)

Applications should call this to report the current queue length.

Parameters:

length -

recordQueueLength

public void recordQueueLength(long length,
                              long headTimestamp)

Applications should call this to report the current queue length when an item is removed from the queue.

Parameters:

length - the length of the queue after the item was removed.

headTimestamp - the time in milliseconds when the head item was created and put into the queue.

recordOneSecond

public void recordOneSecond()

Records the number of measured values over the past second and resets the counter. This method should be scheduled to be called once per second.

recordProducerTime

public void recordProducerTime(long time,
                               TimeUnit unit)

Record additional producer time spent outside of the listeners, e.g. before onEvent() is called.

Parameters:

time - the amount of time.

unit - the time unit.

getTrackedListener

public EventListener getTrackedListener()

getListenerMBean

public EventListenerMBean getListenerMBean()

toString

public String toString()

Overrides:

toString in class Object