com.hazelcast.map

Class AbstractEntryProcessor<K,V>

java.lang.Object

com.hazelcast.map.AbstractEntryProcessor<K,V>

Type Parameters:

K - Type of key of a Map.Entry

V - Type of value of a Map.Entry

All Implemented Interfaces:

EntryProcessor<K,V>, Serializable

public abstract class AbstractEntryProcessor<K,V>
extends Object
implements EntryProcessor<K,V>

An abstract EntryProcessor that already has implemented the getBackupProcessor(). In a most cases you want the same logic to be executed on the primary and on the backup. This implementation has this behavior.

Note that there is a possibility which an AbstractEntryProcessor can see that a key exists but its backup processor may not find it due to an unsent backup of a previous operation (e.g. a previous put). In those situations, Hazelcast internally/eventually will sync those owner and backup partitions so you will not lose any data. Because AbstractEntryProcessor uses the same processor in both owner and backup, you should take this case into account when implementing EntryProcessor.process(java.util.Map.Entry).

See Also:

EntryProcessor, EntryBackupProcessor, Serialized Form

Constructor Summary

Constructors

Constructor and Description
AbstractEntryProcessor() Creates an AbstractEntryProcessor that applies the EntryProcessor.process(java.util.Map.Entry) to primary and backups.
AbstractEntryProcessor(boolean applyOnBackup) Creates an AbstractEntryProcessor.

Method Summary

Modifier and Type	Method and Description
EntryBackupProcessor<K,V>	getBackupProcessor() Get the entry processor to be applied to backup entries.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.hazelcast.map.EntryProcessor

process

Constructor Detail

AbstractEntryProcessor

public AbstractEntryProcessor()

Creates an AbstractEntryProcessor that applies the EntryProcessor.process(java.util.Map.Entry) to primary and backups.

AbstractEntryProcessor

public AbstractEntryProcessor(boolean applyOnBackup)

Creates an AbstractEntryProcessor.

Parameters:

applyOnBackup - true if the EntryProcessor.process(java.util.Map.Entry) should also be applied on the backup.

Method Detail

getBackupProcessor

public final EntryBackupProcessor<K,V> getBackupProcessor()

Description copied from interface: EntryProcessor

Get the entry processor to be applied to backup entries. In case of a readonly execution, null can be returned to indicate that no backups should be made.

Specified by:

getBackupProcessor in interface EntryProcessor<K,V>

Returns:

the back up processor