com.hazelcast.cache.merge

Class PutIfAbsentCacheMergePolicy

java.lang.Object

com.hazelcast.cache.merge.PutIfAbsentCacheMergePolicy

All Implemented Interfaces:

CacheMergePolicy, StorageTypeAwareCacheMergePolicy, Serializable

public class PutIfAbsentCacheMergePolicy
extends Object
implements StorageTypeAwareCacheMergePolicy

`PassThroughCacheMergePolicy` policy merges cache entry from source to destination if it does not exist in the destination cache.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
PutIfAbsentCacheMergePolicy()

Method Summary

Modifier and Type	Method and Description
Object	merge(String cacheName, CacheEntryView mergingEntry, CacheEntryView existingEntry) Selects one of the merging and existing cache entries to be merged.

Methods inherited from class java.lang.Object

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

Constructor Detail

PutIfAbsentCacheMergePolicy

public PutIfAbsentCacheMergePolicy()

Method Detail

merge

public Object merge(String cacheName,
                    CacheEntryView mergingEntry,
                    CacheEntryView existingEntry)

Description copied from interface: CacheMergePolicy

Selects one of the merging and existing cache entries to be merged.

Note that as mentioned also in arguments, the CacheEntryView instance that represents existing cache entry may be null if there is no existing entry for the specified key in the the CacheEntryView instance that represents merging cache entry.

Specified by:

merge in interface CacheMergePolicy

Parameters:

cacheName - name of the cache

mergingEntry - CacheEntryView instance that has cache entry to be merged

existingEntry - CacheEntryView instance that has existing cache entry. This entry may be null if there is no existing cache entry.

Returns:

the selected value for merging