Module org.eclipse.persistence.core

Package org.eclipse.persistence.internal.sessions

Class UnitOfWorkIdentityMapAccessor

java.lang.Object

org.eclipse.persistence.internal.sessions.IdentityMapAccessor

org.eclipse.persistence.internal.sessions.UnitOfWorkIdentityMapAccessor

All Implemented Interfaces:

Serializable, IdentityMapAccessor

public class UnitOfWorkIdentityMapAccessor
extends IdentityMapAccessor

INTERNAL: IdentityMapAccessor subclass for UnitOfWork Overrides some initialization functionality and some behavior having to do with getting objects from identity maps.

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.eclipse.persistence.internal.sessions.IdentityMapAccessor

identityMapManager, session

Constructor Summary

Constructors

Constructor	Description
UnitOfWorkIdentityMapAccessor()
UnitOfWorkIdentityMapAccessor(AbstractSession session, IdentityMapManager identityMapManager)

Method Summary

Modifier and Type	Method	Description
protected Object	checkForInheritance(Object domainObject, Class<?> superClass, ClassDescriptor descriptor)	This method is used to resolve the inheritance issues arise while trying to get object from identity map of parent session.
void	clearQueryCache()	ADVANCED: Clear all the query caches
void	clearQueryCache(String sessionQueryName)	ADVANCED: Clear the query cache associated with the named query on the session
void	clearQueryCache(String descriptorQueryName, Class<?> queryClass)	ADVANCED: Clear the query cache associated with the named query on the descriptor for the given class
void	clearQueryCache(ReadQuery query)	ADVANCED: Clear the query class associated with the passed-in read query
boolean	containsObjectInIdentityMap(Object primaryKey, Class<?> theClass, ClassDescriptor descriptor)	INTERNAL: Return if their is an object for the primary key.
Vector	getAllFromIdentityMap(Expression selectionCriteria, Class<?> theClass, DataRecord translationRow, int valueHolderPolicy, boolean shouldReturnInvalidatedObjects)	INTERNAL: This method overrides the getAllFromIdentityMap method in Session.
protected Object	getAndCloneCacheKeyFromParent(Object primaryKey, Object objectToClone, Class<?> theClass, boolean shouldReturnInvalidatedObjects, ClassDescriptor descriptor)	INTERNAL: This method will return the object from the parent and clone it.
Object	getFromIdentityMap(Object primaryKey, Object object, Class<?> theClass, boolean shouldReturnInvalidatedObjects, ClassDescriptor descriptor)	INTERNAL: Return the object from the identity map with the primary key and class.
Object	getFromIdentityMapWithDeferredLock(Object primaryKey, Class<?> theClass, boolean shouldReturnInvalidatedObjects, ClassDescriptor descriptor)	INTERNAL: Override the getFromIdentityMapWithDeferredLock method on the session to ensure that invalidated objects are always returned since this is a UnitOfWork
Object	getQueryResult(ReadQuery query, List parameters, boolean checkExpiry)	INTERNAL: Get the cached results associated with a query.
void	initializeAllIdentityMaps()	INTERNAL: Reset the entire object cache, ** be careful using this.
void	invalidateQueryCache(Class<?> classThatChanged)	Invalidate/remove any results for the class from the query cache.
void	putQueryResult(ReadQuery query, List parameters, Object results)	INTERNAL: Set the results for a query.

Methods inherited from class org.eclipse.persistence.internal.sessions.IdentityMapAccessor

acquireDeferredLock, acquireLock, acquireLock, acquireLockNoWait, acquireLockWithWait, acquireReadLockOnCacheKey, acquireReadLockOnCacheKeyNoWait, acquireWriteLock, containsObjectInIdentityMap, containsObjectInIdentityMap, containsObjectInIdentityMap, extractPrimaryKeyFromRow, getAllCacheKeysFromIdentityMapWithEntityPK, getAllFromIdentityMap, getAllFromIdentityMap, getAllFromIdentityMap, getAllFromIdentityMap, getAllFromIdentityMapWithEntityPK, getCacheKeyByIndex, getCacheKeyForObject, getCacheKeyForObject, getCacheKeyForObject, getCacheKeyForObjectForLock, getClassesRegistered, getFromIdentityMap, getFromIdentityMap, getFromIdentityMap, getFromIdentityMap, getFromIdentityMap, getFromIdentityMap, getFromIdentityMap, getFromIdentityMap, getFromIdentityMap, getFromIdentityMap, getFromIdentityMap, getFromIdentityMap, getFromIdentityMapWithDeferredLock, getFromLocalIdentityMap, getFromLocalIdentityMapWithDeferredLock, getIdentityMap, getIdentityMap, getIdentityMap, getIdentityMapManager, getRemainingValidTime, getSession, getWrapper, getWriteLockManager, getWriteLockValue, getWriteLockValue, getWriteLockValue, initializeIdentityMap, initializeIdentityMaps, internalPutInIdentityMap, invalidateAll, invalidateClass, invalidateClass, invalidateObject, invalidateObject, invalidateObject, invalidateObject, invalidateObject, invalidateObject, invalidateObjects, invalidateObjects, invalidateObjects, invalidateObjects, isValid, isValid, isValid, printIdentityMap, printIdentityMapLocks, printIdentityMaps, putCacheKeyByIndex, putInIdentityMap, putInIdentityMap, putInIdentityMap, putInIdentityMap, putInIdentityMap, releaseWriteLock, removeFromIdentityMap, removeFromIdentityMap, removeFromIdentityMap, setIdentityMapManager, setWrapper, updateWriteLockValue, updateWriteLockValue, validateCache

Methods inherited from class java.lang.Object

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

Constructor Details

UnitOfWorkIdentityMapAccessor

public UnitOfWorkIdentityMapAccessor()

UnitOfWorkIdentityMapAccessor

public UnitOfWorkIdentityMapAccessor(AbstractSession session,
 IdentityMapManager identityMapManager)

Method Details

clearQueryCache

public void clearQueryCache()

ADVANCED: Clear all the query caches

Specified by:

clearQueryCache in interface IdentityMapAccessor

Overrides:

clearQueryCache in class IdentityMapAccessor

invalidateQueryCache

public void invalidateQueryCache(Class<?> classThatChanged)

Invalidate/remove any results for the class from the query cache. This is used to invalidate the query cache on any change.

Specified by:

invalidateQueryCache in interface IdentityMapAccessor

Overrides:

invalidateQueryCache in class IdentityMapAccessor

clearQueryCache

public void clearQueryCache(ReadQuery query)

ADVANCED: Clear the query class associated with the passed-in read query

Specified by:

clearQueryCache in interface IdentityMapAccessor

Overrides:

clearQueryCache in class IdentityMapAccessor

clearQueryCache

public void clearQueryCache(String sessionQueryName)

ADVANCED: Clear the query cache associated with the named query on the session

Specified by:

clearQueryCache in interface IdentityMapAccessor

Overrides:

clearQueryCache in class IdentityMapAccessor

clearQueryCache

public void clearQueryCache(String descriptorQueryName,
 Class<?> queryClass)

ADVANCED: Clear the query cache associated with the named query on the descriptor for the given class

Specified by:

clearQueryCache in interface IdentityMapAccessor

Overrides:

clearQueryCache in class IdentityMapAccessor

containsObjectInIdentityMap

public boolean containsObjectInIdentityMap(Object primaryKey,
 Class<?> theClass,
 ClassDescriptor descriptor)

INTERNAL: Return if their is an object for the primary key.

Overrides:

containsObjectInIdentityMap in class IdentityMapAccessor

getAllFromIdentityMap

public Vector getAllFromIdentityMap(Expression selectionCriteria,
 Class<?> theClass,
 DataRecord translationRow,
 int valueHolderPolicy,
 boolean shouldReturnInvalidatedObjects)
                             throws QueryException

INTERNAL: This method overrides the getAllFromIdentityMap method in Session. Invalidated Objects will always be returned from a UnitOfWork.

Specified by:

getAllFromIdentityMap in interface IdentityMapAccessor

Overrides:

getAllFromIdentityMap in class IdentityMapAccessor

Parameters:

selectionCriteria - Expression selecting the Objects to be returned

theClass - Class to be considered

translationRow - Record

valueHolderPolicy - see InMemoryQueryIndirectionPolicy

shouldReturnInvalidatedObjects - boolean - true if only invalid Objects should be returned

Returns:

Vector of Objects

Throws:

QueryException

getFromIdentityMapWithDeferredLock

public Object getFromIdentityMapWithDeferredLock(Object primaryKey,
 Class<?> theClass,
 boolean shouldReturnInvalidatedObjects,
 ClassDescriptor descriptor)

INTERNAL: Override the getFromIdentityMapWithDeferredLock method on the session to ensure that invalidated objects are always returned since this is a UnitOfWork

Overrides:

getFromIdentityMapWithDeferredLock in class IdentityMapAccessor

getFromIdentityMap

public Object getFromIdentityMap(Object primaryKey,
 Object object,
 Class<?> theClass,
 boolean shouldReturnInvalidatedObjects,
 ClassDescriptor descriptor)

INTERNAL: Return the object from the identity map with the primary key and class. The parent's cache must be checked after the child's, if found in the parent, it must be registered/cloned (but must avoid looping). Note: in a UnitOfWork, invalidated objects will always be returned from the identity map In the parent session, only return the object if it has not been Invalidated

Overrides:

getFromIdentityMap in class IdentityMapAccessor

getAndCloneCacheKeyFromParent

protected Object getAndCloneCacheKeyFromParent(Object primaryKey,
 Object objectToClone,
 Class<?> theClass,
 boolean shouldReturnInvalidatedObjects,
 ClassDescriptor descriptor)

INTERNAL: This method will return the object from the parent and clone it.

getQueryResult

public Object getQueryResult(ReadQuery query,
 List parameters,
 boolean checkExpiry)

INTERNAL: Get the cached results associated with a query. Results are cached by the values of the parameters to the query so different parameters will have different cached results. results are only cached in the parent session for UnitOfWorks

Overrides:

getQueryResult in class IdentityMapAccessor

putQueryResult

public void putQueryResult(ReadQuery query,
 List parameters,
 Object results)

INTERNAL: Set the results for a query. Query results are cached based on the parameter values provided to the query different parameter values access different caches. Results are only cached in the parent session for UnitOfWorks

Overrides:

putQueryResult in class IdentityMapAccessor

initializeAllIdentityMaps

public void initializeAllIdentityMaps()

INTERNAL: Reset the entire object cache, ** be careful using this. This method blows away both this session's and its parents caches, this includes the server cache or any other cache. This throws away any objects that have been read in. Extreme caution should be used before doing this because object identity will no longer be maintained for any objects currently read in. This should only be called if the application knows that it no longer has references to object held in the cache.

Specified by:

initializeAllIdentityMaps in interface IdentityMapAccessor

Overrides:

initializeAllIdentityMaps in class IdentityMapAccessor

checkForInheritance

protected Object checkForInheritance(Object domainObject,
 Class<?> superClass,
 ClassDescriptor descriptor)

This method is used to resolve the inheritance issues arise while trying to get object from identity map of parent session. Avoid reading the unintended subclass during in-memory query (e.g. when querying on large project, do not want to check small project, both are inherited from the project, and stored in the same identity map).