com.hazelcast.map.impl

Class EventListenerFilter

java.lang.Object

com.hazelcast.map.impl.EventListenerFilter

All Implemented Interfaces:

DataSerializable, IdentifiedDataSerializable, EventFilter

public class EventListenerFilter
extends Object
implements EventFilter, IdentifiedDataSerializable

Event filter matching events of specified types. This filter also contains an another filter but it does not involve it when evaluating if the event matches. Prevents sending of not requested events to a MapListener by filtering events according the implemented MapListener sub-interfaces.

Specifically, for example, if a listener is registered via an implementation like this:

public class MyMapListener implements EntryAddedListener, EntryRemovedListener { ... }

That listener will only be notified for EntryEventType.ADDED and EntryEventType.REMOVED events. Other events, like EntryEventType.EVICTED or EntryEventType.EXPIRED, will not be sent over wire. This may help to reduce load on eventing system and network.

Since:

3.6

See Also:

MapListenerFlagOperator.setAndGetListenerFlags(ListenerAdapter), MapListener

Constructor Summary

Constructors

Constructor and Description
EventListenerFilter()
EventListenerFilter(int listenerFlags, EventFilter eventFilter)

Method Summary

Modifier and Type	Method and Description
boolean	eval(Object object) Returns true if the event matches this filter.
EventFilter	getEventFilter()
int	getFactoryId() Returns DataSerializableFactory factory ID for this class.
int	getId() Returns type identifier for this class.
void	readData(ObjectDataInput in) Reads fields from the input stream
String	toString()
void	writeData(ObjectDataOutput out) Writes object fields to output stream

Methods inherited from class java.lang.Object

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

Constructor Detail

EventListenerFilter

public EventListenerFilter()

EventListenerFilter

public EventListenerFilter(int listenerFlags,
                           EventFilter eventFilter)

Method Detail

writeData

public void writeData(ObjectDataOutput out)
               throws IOException

Description copied from interface: DataSerializable

Writes object fields to output stream

Specified by:

writeData in interface DataSerializable

Parameters:

out - output

Throws:

IOException - if an I/O error occurs. In particular, an IOException may be thrown if the output stream has been closed.

readData

public void readData(ObjectDataInput in)
              throws IOException

Description copied from interface: DataSerializable

Reads fields from the input stream

Specified by:

readData in interface DataSerializable

Parameters:

in - input

Throws:

IOException - if an I/O error occurs. In particular, an IOException may be thrown if the input stream has been closed.

eval

public boolean eval(Object object)

Description copied from interface: EventFilter

Returns true if the event matches this filter.

Specified by:

eval in interface EventFilter

getEventFilter

public EventFilter getEventFilter()

toString

public String toString()

Overrides:

toString in class Object

getFactoryId

public int getFactoryId()

Description copied from interface: IdentifiedDataSerializable

Returns DataSerializableFactory factory ID for this class.

Specified by:

getFactoryId in interface IdentifiedDataSerializable

Returns:

factory ID

getId

public int getId()

Description copied from interface: IdentifiedDataSerializable

Returns type identifier for this class. It should be unique per DataSerializableFactory.

Specified by:

getId in interface IdentifiedDataSerializable

Returns:

type ID