org.epics.ca.impl.monitor.disruptor

Class MonitorBatchEventProcessor<T>

java.lang.Object

org.epics.ca.impl.monitor.disruptor.MonitorBatchEventProcessor<T>

Type Parameters:

T - event implementation storing the data for sharing during exchange or parallel coordination of an event.

All Implemented Interfaces:

com.lmax.disruptor.EventProcessor, java.lang.Runnable

public final class MonitorBatchEventProcessor<T>
extends java.lang.Object
implements com.lmax.disruptor.EventProcessor

This is a modification of BatchEventProcessor that reports monitor connection loss events.

Convenience class for handling the batching semantics of consuming entries from a RingBuffer and delegating the available events to an EventHandler.

If the EventHandler also implements LifecycleAware it will be notified just after the thread is started and just before the thread is shutdown.

Constructor Summary

Constructors

Constructor and Description

MonitorBatchEventProcessor(ConnectionInterruptable channel, T disconnectedValue, java.util.function.Predicate<T> isDisconnectedValue, com.lmax.disruptor.DataProvider<T> dataProvider, com.lmax.disruptor.SequenceBarrier sequenceBarrier, com.lmax.disruptor.EventHandler<? super T> eventHandler) Construct a EventProcessor that will automatically track the progress by updating its sequence when the EventHandler.onEvent(Object, long, boolean) method returns.

Method Summary

Modifier and Type	Method and Description
com.lmax.disruptor.Sequence	getSequence()
void	halt()
boolean	isRunning()
void	run() It is ok to have another thread rerun this method after a halt().
void	setExceptionHandler(com.lmax.disruptor.ExceptionHandler<? super T> exceptionHandler) Set a new ExceptionHandler for handling exceptions propagated out of the MonitorBatchEventProcessor

Methods inherited from class java.lang.Object

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

Constructor Detail

MonitorBatchEventProcessor

public MonitorBatchEventProcessor(ConnectionInterruptable channel,
                                  T disconnectedValue,
                                  java.util.function.Predicate<T> isDisconnectedValue,
                                  com.lmax.disruptor.DataProvider<T> dataProvider,
                                  com.lmax.disruptor.SequenceBarrier sequenceBarrier,
                                  com.lmax.disruptor.EventHandler<? super T> eventHandler)

Construct a EventProcessor that will automatically track the progress by updating its sequence when the EventHandler.onEvent(Object, long, boolean) method returns.

Parameters:

channel - reference to an object which can report on the state of the connection.

disconnectedValue - the value to be published to indicate channel disconnection.

isDisconnectedValue - predicate which returns true when the channel is disconnected.

dataProvider - to which events are published.

sequenceBarrier - on which it is waiting.

eventHandler - is the delegate to which events are dispatched.

Method Detail

getSequence

public com.lmax.disruptor.Sequence getSequence()

Specified by:

getSequence in interface com.lmax.disruptor.EventProcessor

halt

public void halt()

Specified by:

halt in interface com.lmax.disruptor.EventProcessor

isRunning

public boolean isRunning()

Specified by:

isRunning in interface com.lmax.disruptor.EventProcessor

setExceptionHandler

public void setExceptionHandler(com.lmax.disruptor.ExceptionHandler<? super T> exceptionHandler)

Set a new ExceptionHandler for handling exceptions propagated out of the MonitorBatchEventProcessor

Parameters:

exceptionHandler - to replace the existing exceptionHandler.

run

public void run()

It is ok to have another thread rerun this method after a halt().

Specified by:

run in interface java.lang.Runnable

Throws:

java.lang.IllegalStateException - if this object instance is already running in a thread