com.hazelcast.cache.merge

Class PassThroughCacheMergePolicy

java.lang.Object

com.hazelcast.cache.merge.PassThroughCacheMergePolicy

All Implemented Interfaces:

CacheMergePolicy, StorageTypeAwareCacheMergePolicy, DataSerializable

public class PassThroughCacheMergePolicy
extends Object
implements StorageTypeAwareCacheMergePolicy

`PassThroughCacheMergePolicy` policy merges cache entry from source to destination directly.

Constructor Summary

Constructors

Constructor and Description
PassThroughCacheMergePolicy()

Method Summary

Methods

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.
void	readData(ObjectDataInput objectDataInput) Reads fields from the input stream
void	writeData(ObjectDataOutput objectDataOutput) Writes object fields to output stream

Methods inherited from class java.lang.Object

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

Constructor Detail

PassThroughCacheMergePolicy

public PassThroughCacheMergePolicy()

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

writeData

public void writeData(ObjectDataOutput objectDataOutput)
               throws IOException

Description copied from interface: DataSerializable

Writes object fields to output stream

Specified by:

writeData in interface DataSerializable

Parameters:

objectDataOutput - output

Throws:

IOException

readData

public void readData(ObjectDataInput objectDataInput)
              throws IOException

Description copied from interface: DataSerializable

Reads fields from the input stream

Specified by:

readData in interface DataSerializable

Parameters:

objectDataInput - input

Throws:

IOException