Package org.eclipse.persistence.internal.identitymaps

Class UnitOfWorkIdentityMap

java.lang.Object

org.eclipse.persistence.internal.identitymaps.AbstractIdentityMap

org.eclipse.persistence.internal.identitymaps.FullIdentityMap

org.eclipse.persistence.internal.identitymaps.UnitOfWorkIdentityMap

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, IdentityMap

Direct Known Subclasses:

WeakUnitOfWorkIdentityMap

public class UnitOfWorkIdentityMap
extends FullIdentityMap

Unit of work specific identity map which avoid additional overhead not required in unit of work, such as locking and synchronization.

Since:

TopLink 10.1.3.1

Author:

James Sutherland

See Also:

Serialized Form

Field Summary

Fields inherited from class org.eclipse.persistence.internal.identitymaps.FullIdentityMap

cacheKeys

Fields inherited from class org.eclipse.persistence.internal.identitymaps.AbstractIdentityMap

descriptor, isIsolated, maxSize, session

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	UnitOfWorkIdentityMap()
	UnitOfWorkIdentityMap(int size, ClassDescriptor descriptor, AbstractSession session, boolean isolated)

Method Summary

Modifier and Type	Method	Description
CacheKey	acquireDeferredLock(java.lang.Object primaryKey, boolean isCacheCheckComplete)	Avoid acquiring any lock as uow is single threaded.
CacheKey	acquireLock(java.lang.Object primaryKey, boolean forMerge, boolean isCacheCheckComplete)	Avoid acquiring any lock as uow is single threaded.
CacheKey	acquireLockNoWait(java.lang.Object primaryKey, boolean forMerge)	Avoid acquiring any lock as uow is single threaded.
CacheKey	acquireLockWithWait(java.lang.Object primaryKey, boolean forMerge, int wait)	Avoid acquiring any lock as uow is single threaded.
CacheKey	acquireReadLockOnCacheKey(java.lang.Object primaryKey)	Avoid acquiring any lock as uow is single threaded.
CacheKey	acquireReadLockOnCacheKeyNoWait(java.lang.Object primaryKey)	Avoid acquiring any lock as uow is single threaded.
CacheKey	createCacheKey(java.lang.Object primaryKey, java.lang.Object object, java.lang.Object writeLockValue, long readTime)	Create the correct type of CacheKey for this map.
protected CacheKey	getCacheKeyWithReadLock(java.lang.Object primaryKey)	Avoid acquiring any lock as uow is single threaded.
protected CacheKey	putCacheKeyIfAbsent(CacheKey searchKey)	Use hashmap put, as no concurrency in unit of work.
java.lang.Object	remove(CacheKey cacheKey)	Avoid acquiring any lock as uow is single threaded.
void	resetCacheKey(CacheKey key, java.lang.Object object, java.lang.Object writeLockValue, long readTime)	Avoid acquiring any lock as uow is single threaded.
void	setWriteLockValue(java.lang.Object primaryKey, java.lang.Object writeLockValue)	Avoid acquiring any lock as uow is single threaded.

Methods inherited from class org.eclipse.persistence.internal.identitymaps.FullIdentityMap

clone, cloneKeys, collectLocks, elements, getCacheKey, getCacheKeys, getSize, getSize, keys, keys, lazyRelationshipLoaded, put, setCacheKeys

Methods inherited from class org.eclipse.persistence.internal.identitymaps.AbstractIdentityMap

containsKey, get, getAllCacheKeysFromIdentityMapWithEntityPK, getAllFromIdentityMapWithEntityPK, getCacheKeyForLock, getDefaultIdentityMapClass, getDescriptor, getDescriptorClass, getMaxSize, getWrapper, getWriteLockValue, release, remove, setDescriptor, setMaxSize, setWrapper, toString, updateMaxSize

Methods inherited from class java.lang.Object

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

Constructor Detail

UnitOfWorkIdentityMap

protected UnitOfWorkIdentityMap()

UnitOfWorkIdentityMap

public UnitOfWorkIdentityMap(int size,
                             ClassDescriptor descriptor,
                             AbstractSession session,
                             boolean isolated)

Method Detail

createCacheKey

public CacheKey createCacheKey(java.lang.Object primaryKey,
                               java.lang.Object object,
                               java.lang.Object writeLockValue,
                               long readTime)

Description copied from class: AbstractIdentityMap

Create the correct type of CacheKey for this map.

Overrides:

createCacheKey in class AbstractIdentityMap

acquireDeferredLock

public CacheKey acquireDeferredLock(java.lang.Object primaryKey,
                                    boolean isCacheCheckComplete)

Avoid acquiring any lock as uow is single threaded.

Specified by:

acquireDeferredLock in interface IdentityMap

Overrides:

acquireDeferredLock in class AbstractIdentityMap

acquireLock

public CacheKey acquireLock(java.lang.Object primaryKey,
                            boolean forMerge,
                            boolean isCacheCheckComplete)

Avoid acquiring any lock as uow is single threaded.

Specified by:

acquireLock in interface IdentityMap

Overrides:

acquireLock in class AbstractIdentityMap

acquireLockNoWait

public CacheKey acquireLockNoWait(java.lang.Object primaryKey,
                                  boolean forMerge)

Avoid acquiring any lock as uow is single threaded.

Specified by:

acquireLockNoWait in interface IdentityMap

Overrides:

acquireLockNoWait in class AbstractIdentityMap

acquireLockWithWait

public CacheKey acquireLockWithWait(java.lang.Object primaryKey,
                                    boolean forMerge,
                                    int wait)

Avoid acquiring any lock as uow is single threaded.

Specified by:

acquireLockWithWait in interface IdentityMap

Overrides:

acquireLockWithWait in class AbstractIdentityMap

acquireReadLockOnCacheKey

public CacheKey acquireReadLockOnCacheKey(java.lang.Object primaryKey)

Avoid acquiring any lock as uow is single threaded.

Specified by:

acquireReadLockOnCacheKey in interface IdentityMap

Overrides:

acquireReadLockOnCacheKey in class AbstractIdentityMap

acquireReadLockOnCacheKeyNoWait

public CacheKey acquireReadLockOnCacheKeyNoWait(java.lang.Object primaryKey)

Avoid acquiring any lock as uow is single threaded.

Specified by:

acquireReadLockOnCacheKeyNoWait in interface IdentityMap

Overrides:

acquireReadLockOnCacheKeyNoWait in class AbstractIdentityMap

getCacheKeyWithReadLock

protected CacheKey getCacheKeyWithReadLock(java.lang.Object primaryKey)

Avoid acquiring any lock as uow is single threaded.

Overrides:

getCacheKeyWithReadLock in class AbstractIdentityMap

putCacheKeyIfAbsent

protected CacheKey putCacheKeyIfAbsent(CacheKey searchKey)

Use hashmap put, as no concurrency in unit of work.

Overrides:

putCacheKeyIfAbsent in class FullIdentityMap

remove

public java.lang.Object remove(CacheKey cacheKey)

Avoid acquiring any lock as uow is single threaded.

Specified by:

remove in interface IdentityMap

Overrides:

remove in class FullIdentityMap

Returns:

the object held within the CacheKey or null if no object cached for given cacheKey.

resetCacheKey

public void resetCacheKey(CacheKey key,
                          java.lang.Object object,
                          java.lang.Object writeLockValue,
                          long readTime)

Avoid acquiring any lock as uow is single threaded.

Overrides:

resetCacheKey in class FullIdentityMap

setWriteLockValue

public void setWriteLockValue(java.lang.Object primaryKey,
                              java.lang.Object writeLockValue)

Avoid acquiring any lock as uow is single threaded.

Specified by:

setWriteLockValue in interface IdentityMap

Overrides:

setWriteLockValue in class AbstractIdentityMap