Module com.hazelcast.hibernate53

Package com.hazelcast.hibernate.distributed

Class IMapRegionCache

java.lang.Object

com.hazelcast.hibernate.distributed.IMapRegionCache

All Implemented Interfaces:

RegionCache, org.hibernate.cache.spi.ExtendedStatisticsSupport, org.hibernate.cache.spi.Region

public class IMapRegionCache
extends Object
implements RegionCache

A RegionCache implementation based on the underlying IMap

Note, IMap locks are intentionally not used in this class. Hibernate region caches make use of a concept called soft-locking which has the following properties:

• Multiple transactions can soft-lock an entry concurrently
• While an entry is soft-locked, the value of the cache entry is always null
• An entry is unlocked from a soft-lock when all transactions complete
• An entry is unlocked if it reaches the configured lock timeout

These requirements are incompatible with IMap locks

Constructor Summary

Constructors

Constructor	Description
IMapRegionCache(org.hibernate.cache.spi.RegionFactory regionFactory, String name, com.hazelcast.core.HazelcastInstance hazelcastInstance)

Method Summary

Modifier and Type	Method	Description
void	afterUpdate(Object key, Object newValue, Object newVersion)
boolean	contains(Object key)
void	evictData()
void	evictData(Object key)
Object	get(Object key, long txTimestamp)
long	getElementCountInMemory()	Returns the number of in-memory entries (without backups) for a particular application instance or -1 if using Hazelcast Client
String	getName()
org.hibernate.cache.spi.RegionFactory	getRegionFactory()
long	getSizeInMemory()	Returns the total in-memory cost in bytes (including IMap, Near Cache, backup, Merkle trees) for a particular application instance or -1 if using Hazelcast Client
boolean	put(Object key, Object value, long txTimestamp, Object version)
void	unlockItem(Object key, org.hibernate.cache.spi.access.SoftLock lock)

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.hazelcast.hibernate.RegionCache

clear, destroy, getElementCountOnDisk, nextTimestamp

Constructor Details

IMapRegionCache

public IMapRegionCache(org.hibernate.cache.spi.RegionFactory regionFactory,
 String name,
 com.hazelcast.core.HazelcastInstance hazelcastInstance)

Method Details

afterUpdate

public void afterUpdate(Object key,
 Object newValue,
 Object newVersion)

Specified by:

afterUpdate in interface RegionCache

contains

public boolean contains(Object key)

Specified by:

contains in interface RegionCache

evictData

public void evictData()

Specified by:

evictData in interface RegionCache

evictData

public void evictData(Object key)

Specified by:

evictData in interface RegionCache

get

public Object get(Object key,
 long txTimestamp)

Specified by:

get in interface RegionCache

getElementCountInMemory

public long getElementCountInMemory()

Returns the number of in-memory entries (without backups) for a particular application instance or -1 if using Hazelcast Client

Specified by:

getElementCountInMemory in interface org.hibernate.cache.spi.ExtendedStatisticsSupport

getName

public String getName()

Specified by:

getName in interface org.hibernate.cache.spi.Region

getRegionFactory

public org.hibernate.cache.spi.RegionFactory getRegionFactory()

Specified by:

getRegionFactory in interface org.hibernate.cache.spi.Region

getSizeInMemory

public long getSizeInMemory()

Returns the total in-memory cost in bytes (including IMap, Near Cache, backup, Merkle trees) for a particular application instance or -1 if using Hazelcast Client

Specified by:

getSizeInMemory in interface org.hibernate.cache.spi.ExtendedStatisticsSupport

put

public boolean put(Object key,
 Object value,
 long txTimestamp,
 Object version)

Specified by:

put in interface RegionCache

unlockItem

public void unlockItem(Object key,
 org.hibernate.cache.spi.access.SoftLock lock)

Specified by:

unlockItem in interface RegionCache