/******************************************************************************* | |
* Copyright (c) 1998, 2013 Oracle and/or its affiliates. All rights reserved. | |
* This program and the accompanying materials are made available under the | |
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 | |
* which accompanies this distribution. | |
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html | |
* and the Eclipse Distribution License is available at | |
* http://www.eclipse.org/org/documents/edl-v10.php. | |
* | |
* Contributors: | |
* Oracle - initial API and implementation from Oracle TopLink | |
* 31/05/2010-2.1 Michael O'Brien | |
* - 312503: invalidateClass(Class, recurseFlag) - when recurseFlag=false | |
* (non-default) will now invalidate the implementing subtree | |
* from [Class] down. Previously only the single Class inside the tree was invalidated. | |
******************************************************************************/ | |
package org.eclipse.persistence.internal.sessions; | |
import java.util.*; | |
import org.eclipse.persistence.internal.identitymaps.*; | |
import org.eclipse.persistence.internal.descriptors.*; | |
import org.eclipse.persistence.queries.*; | |
import org.eclipse.persistence.descriptors.CacheIndex; | |
import org.eclipse.persistence.descriptors.ClassDescriptor; | |
import org.eclipse.persistence.expressions.*; | |
import org.eclipse.persistence.exceptions.*; | |
import org.eclipse.persistence.sessions.Record; | |
import org.eclipse.persistence.logging.SessionLog; | |
import org.eclipse.persistence.internal.helper.WriteLockManager; | |
import org.eclipse.persistence.sessions.DatabaseRecord; | |
import org.eclipse.persistence.sessions.coordination.CommandManager; | |
import org.eclipse.persistence.sessions.coordination.MergeChangeSetCommand; | |
/** | |
* INTERNAL: | |
* Internal subclass that provides access to identity maps through the session. | |
* Implements the IdentityMapAccessor interface which provides all publicly available | |
* identity map functionality to users. | |
* This is the main class that should be used to access identity maps. In general, any | |
* function that accesses the identity map manager should go through this class | |
* Any session specific functionality appears in subclasses | |
*/ | |
public class IdentityMapAccessor implements org.eclipse.persistence.sessions.IdentityMapAccessor, java.io.Serializable { | |
/** This is the identity map manager for this accessor. It should only be accessed through the getter **/ | |
protected IdentityMapManager identityMapManager = null; | |
protected AbstractSession session = null; | |
/** | |
* INTERNAL: | |
*/ | |
public IdentityMapAccessor() { | |
} | |
/** | |
* INTERNAL: | |
* An IdentityMapAccessor sits between the session and the identityMapManager | |
* It needs references in both directions. | |
*/ | |
public IdentityMapAccessor(AbstractSession session) { | |
this.session = session; | |
} | |
/** | |
* INTERNAL: | |
* An IdentityMapAccessor sits between the session and the identityMapManager | |
* It needs references in both directions. | |
*/ | |
public IdentityMapAccessor(AbstractSession session, IdentityMapManager identityMapManager) { | |
this.session = session; | |
this.identityMapManager = identityMapManager; | |
} | |
/** | |
* INTERNAL: | |
* Deferred lock the identity map for the object, this is used for avoiding deadlock | |
* The return cacheKey should be used to release the deferred lock. | |
*/ | |
public CacheKey acquireDeferredLock(Object primarKey, Class javaClass, ClassDescriptor descriptor, boolean isCacheCheckComplete) { | |
return getIdentityMapManager().acquireDeferredLock(primarKey, javaClass, descriptor, isCacheCheckComplete); | |
} | |
/** | |
* INTERNAL: | |
* Lock the identity map for the object, this must be done when building objects. | |
* The return cacheKey should be used to release the lock. | |
*/ | |
public CacheKey acquireLock(Object primarKey, Class javaClass, ClassDescriptor descriptor, boolean isCacheCheckComplete) { | |
return acquireLock(primarKey, javaClass, false, descriptor, isCacheCheckComplete); | |
} | |
/** | |
* INTERNAL: | |
* Provides access for setting a concurrency lock on an object in the IdentityMap. | |
* Called with true from the merge process, if true then the refresh will not refresh the object. | |
*/ | |
public CacheKey acquireLock(Object primaryKey, Class domainClass, boolean forMerge, ClassDescriptor descriptor, boolean isCacheCheckComplete) { | |
return getIdentityMapManager().acquireLock(primaryKey, domainClass, forMerge, descriptor, isCacheCheckComplete); | |
} | |
/** | |
* INTERNAL: | |
* Provides access for setting a concurrency lock on an object in the IdentityMap. | |
* Called with true from the merge process, if true then the refresh will not refresh the object. | |
*/ | |
public CacheKey acquireLockNoWait(Object primaryKey, Class domainClass, boolean forMerge, ClassDescriptor descriptor) { | |
return getIdentityMapManager().acquireLockNoWait(primaryKey, domainClass, forMerge, descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Provides access for setting a concurrency lock on an object in the IdentityMap. | |
* Called with true from the merge process, if true then the refresh will not refresh the object. | |
*/ | |
public CacheKey acquireLockWithWait(Object primaryKey, Class domainClass, boolean forMerge, ClassDescriptor descriptor, int wait) { | |
return getIdentityMapManager().acquireLockWithWait(primaryKey, domainClass, forMerge, descriptor, wait); | |
} | |
/** | |
* INTERNAL: | |
* Find the cachekey for the provided primary key and place a readlock on it. | |
* This will allow multiple users to read the same object but prevent writes to | |
* the object while the read lock is held. | |
*/ | |
public CacheKey acquireReadLockOnCacheKey(Object primaryKey, Class domainClass, ClassDescriptor descriptor) { | |
return getIdentityMapManager().acquireReadLockOnCacheKey(primaryKey, domainClass, descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Find the cachekey for the provided primary key and place a readlock on it. | |
* This will allow multiple users to read the same object but prevent writes to | |
* the object while the read lock is held. | |
* If no readlock can be acquired then do not wait but return null. | |
*/ | |
public CacheKey acquireReadLockOnCacheKeyNoWait(Object primaryKey, Class domainClass, ClassDescriptor descriptor) { | |
return getIdentityMapManager().acquireReadLockOnCacheKeyNoWait(primaryKey, domainClass, descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Lock the entire cache if the cache isolation requires. | |
* By default concurrent reads and writes are allowed. | |
* By write, unit of work merge is meant. | |
*/ | |
public boolean acquireWriteLock() { | |
return getIdentityMapManager().acquireWriteLock(); | |
} | |
/** | |
* ADVANCED: | |
* Clear all the query caches | |
*/ | |
public void clearQueryCache() { | |
getIdentityMapManager().clearQueryCache(); | |
} | |
/** | |
* ADVANCED: | |
* Clear the query class associated with the passed-in read query | |
*/ | |
public void clearQueryCache(ReadQuery query) { | |
getIdentityMapManager().clearQueryCache(query); | |
} | |
/** | |
* ADVANCED: | |
* Clear the query cache associated with the named query on the session | |
*/ | |
public void clearQueryCache(String sessionQueryName) { | |
getIdentityMapManager().clearQueryCache((ReadQuery)session.getQuery(sessionQueryName)); | |
} | |
/** | |
* ADVANCED: | |
* Clear the query cache associated with the named query on the descriptor for the given class | |
*/ | |
public void clearQueryCache(String descriptorQueryName, Class queryClass) { | |
getIdentityMapManager().clearQueryCache((ReadQuery)session.getDescriptor(queryClass).getQueryManager().getQuery(descriptorQueryName)); | |
} | |
/** | |
* ADVANCED: | |
* Return if their is an object for the primary key. | |
*/ | |
public boolean containsObjectInIdentityMap(Object object) { | |
return containsObjectInIdentityMap(getSession().getId(object), object.getClass()); | |
} | |
/** | |
* Convert the primary key Vector into a primary key object. | |
* This is used to support the old deprecated Vector API. | |
*/ | |
public Object primaryKeyFromVector(Vector primaryKeyVector) { | |
if (primaryKeyVector == null) { | |
return null; | |
} else if (primaryKeyVector.size() == 1) { | |
return primaryKeyVector.get(0); | |
} else { | |
return new CacheId(primaryKeyVector.toArray()); | |
} | |
} | |
/** | |
* ADVANCED: | |
* Return if their is an object for the primary key. | |
*/ | |
@Deprecated | |
public boolean containsObjectInIdentityMap(Vector primaryKey, Class theClass) { | |
return containsObjectInIdentityMap(primaryKeyFromVector(primaryKey), theClass); | |
} | |
/** | |
* ADVANCED: | |
* Return if their is an object for the primary key. | |
*/ | |
public boolean containsObjectInIdentityMap(Object primaryKey, Class theClass) { | |
ClassDescriptor descriptor = getSession().getDescriptor(theClass); | |
return containsObjectInIdentityMap(primaryKey, theClass, descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Return if their is an object for the primary key. | |
*/ | |
public boolean containsObjectInIdentityMap(Object primaryKey, Class theClass, ClassDescriptor descriptor) { | |
return getIdentityMapManager().containsKey(primaryKey, theClass, descriptor); | |
} | |
/** | |
* ADVANCED: | |
* Return if their is an object for the row containing primary key and the class. | |
*/ | |
public boolean containsObjectInIdentityMap(Record rowContainingPrimaryKey, Class theClass) { | |
return containsObjectInIdentityMap(extractPrimaryKeyFromRow(rowContainingPrimaryKey, theClass), theClass); | |
} | |
/** | |
* INTERNAL: | |
* Extract primary key from a row. | |
*/ | |
protected Object extractPrimaryKeyFromRow(Record rowContainingPrimaryKey, Class theClass) { | |
return this.session.getDescriptor(theClass).getObjectBuilder().extractPrimaryKeyFromRow((AbstractRecord)rowContainingPrimaryKey, this.session); | |
} | |
/** | |
* INTERNAL: | |
* Retrieve the cache key for the given object from the identity maps. | |
* @param object the object to get the cache key for. | |
*/ | |
public CacheKey getCacheKeyForObject(Object object, ClassDescriptor descriptor) { | |
return getCacheKeyForObject(getSession().keyFromObject(object, descriptor), object.getClass(), descriptor, false); | |
} | |
/** | |
* INTERNAL: | |
* This method is used to get a list of those classes with IdentityMaps in the Session. | |
*/ | |
public Vector getClassesRegistered() { | |
return getIdentityMapManager().getClassesRegistered(); | |
} | |
/** | |
* ADVANCED: | |
* Query the cache in-memory. | |
* If the expression is too complex an exception will be thrown. | |
*/ | |
public Vector getAllFromIdentityMap(Expression selectionCriteria, Class theClass, Record translationRow) throws QueryException { | |
return getAllFromIdentityMap(selectionCriteria, theClass, translationRow, InMemoryQueryIndirectionPolicy.SHOULD_THROW_INDIRECTION_EXCEPTION, true); | |
} | |
/** | |
* ADVANCED: | |
* Query the cache in-memory. | |
* If the expression is too complex an exception will be thrown. | |
*/ | |
public Vector getAllFromIdentityMap(Expression selectionCriteria, Class theClass, Record translationRow, InMemoryQueryIndirectionPolicy valueHolderPolicy) throws QueryException { | |
return getAllFromIdentityMap(selectionCriteria, theClass, translationRow, valueHolderPolicy, true); | |
} | |
/** | |
* ADVANCED: | |
* Query the cache in-memory. | |
* If the expression is too complex an exception will be thrown. | |
*/ | |
public Vector getAllFromIdentityMap(Expression selectionCriteria, Class theClass, Record translationRow, int valueHolderPolicy) throws QueryException { | |
return getAllFromIdentityMap(selectionCriteria, theClass, translationRow, valueHolderPolicy, true); | |
} | |
/** | |
* ADVANCED: | |
* Query the cache in-memory. | |
* If the expression is too complex an exception will be thrown. | |
* Only return objects that are invalid in the cache if specified. | |
*/ | |
public Vector getAllFromIdentityMap(Expression selectionCriteria, Class theClass, Record translationRow, InMemoryQueryIndirectionPolicy valueHolderPolicy, boolean shouldReturnInvalidatedObjects) throws QueryException { | |
int policy = 0; | |
if (valueHolderPolicy != null) { | |
policy = valueHolderPolicy.getPolicy(); | |
} | |
return getAllFromIdentityMap(selectionCriteria, theClass, translationRow, policy, shouldReturnInvalidatedObjects); | |
} | |
/** | |
* ADVANCED: | |
* Query the cache in-memory. | |
* If the expression is too complex an exception will be thrown. | |
* Only return objects that are invalid in the cache if specified. | |
*/ | |
public Vector getAllFromIdentityMap(Expression selectionCriteria, Class theClass, Record translationRow, int valueHolderPolicy, boolean shouldReturnInvalidatedObjects) throws QueryException { | |
return getIdentityMapManager().getAllFromIdentityMap(selectionCriteria, theClass, translationRow, valueHolderPolicy, shouldReturnInvalidatedObjects); | |
} | |
/** | |
* ADVANCED: | |
* Using a list of Entity PK this method will attempt to bulk load the entire list from the cache. | |
* In certain circumstances this can have large performance improvements over loading each item individually. | |
* @param pkList List of Entity PKs to extract from the cache | |
* @param ClassDescriptor Descriptor type to be retrieved. | |
* @return Map of Entity PKs associated to the Entities that were retrieved | |
* @throws QueryException | |
*/ | |
public Map<Object, Object> getAllFromIdentityMapWithEntityPK(Object[] pkList, ClassDescriptor descriptor){ | |
return getIdentityMapManager().getAllFromIdentityMapWithEntityPK(pkList, descriptor, getSession()); | |
} | |
/** | |
* ADVANCED: | |
* Using a list of Entity PK this method will attempt to bulk load the entire list from the cache. | |
* In certain circumstances this can have large performance improvements over loading each item individually. | |
* @param pkList List of Entity PKs to extract from the cache | |
* @param ClassDescriptor Descriptor type to be retrieved. | |
* @return Map of Entity PKs associated to the Entities that were retrieved | |
* @throws QueryException | |
*/ | |
public Map<Object, CacheKey> getAllCacheKeysFromIdentityMapWithEntityPK(Object[] pkList, ClassDescriptor descriptor){ | |
return getIdentityMapManager().getAllCacheKeysFromIdentityMapWithEntityPK(pkList, descriptor, getSession()); | |
} | |
/** | |
* ADVANCED: | |
* Return the object from the identity with primary and class of the given object. | |
*/ | |
public Object getFromIdentityMap(Object object) { | |
return getFromIdentityMap(getSession().getId(object), object.getClass()); | |
} | |
/** | |
* INTERNAL: | |
* Retrieve the cache key for the given object. | |
* @return CacheKey | |
*/ | |
public CacheKey getCacheKeyForObject(Object object) { | |
return getCacheKeyForObject(getSession().getId(object), object.getClass(), getSession().getDescriptor(object.getClass()), false); | |
} | |
/** | |
* INTERNAL: | |
* Retrieve the cache key for the given identity information. | |
* @param primaryKey the primary key of the cache key to be retrieved. | |
* @param myClass the class of the cache key to be retrieved. | |
*/ | |
public CacheKey getCacheKeyForObjectForLock(Object primaryKey, Class myClass, ClassDescriptor descriptor) { | |
return getIdentityMapManager().getCacheKeyForObjectForLock(primaryKey, myClass, descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Retrieve the cache key for the given identity information. | |
* @param primaryKey the primary key of the cache key to be retrieved. | |
* @param myClass the class of the cache key to be retrieved. | |
*/ | |
public CacheKey getCacheKeyForObject(Object primaryKey, Class myClass, ClassDescriptor descriptor, boolean forMerge) { | |
return getIdentityMapManager().getCacheKeyForObject(primaryKey, myClass, descriptor, forMerge); | |
} | |
/** | |
* ADVANCED: | |
* Return the object from the identity with the primary and class. | |
*/ | |
@Deprecated | |
public Object getFromIdentityMap(Vector primaryKey, Class theClass) { | |
return getFromIdentityMap(primaryKeyFromVector(primaryKey), theClass); | |
} | |
/** | |
* ADVANCED: | |
* Return the object from the identity with the primary and class. | |
*/ | |
public Object getFromIdentityMap(Object primaryKey, Class theClass) { | |
return getFromIdentityMap(primaryKey, theClass, true); | |
} | |
/** | |
* ADVANCED: | |
* Return the object from the identity with the primary and class. | |
*/ | |
public Object getFromIdentityMap(Object primaryKey, Class theClass, ClassDescriptor descriptor) { | |
return getFromIdentityMap(primaryKey, null, theClass, true, descriptor); | |
} | |
/** | |
* ADVANCED: | |
* Return the object from the identity with the primary and class. | |
* Only return invalidated objects if requested. | |
*/ | |
@Deprecated | |
public Object getFromIdentityMap(Vector primaryKey, Class theClass, boolean shouldReturnInvalidatedObjects) { | |
return getFromIdentityMap(primaryKeyFromVector(primaryKey), theClass, shouldReturnInvalidatedObjects); | |
} | |
/** | |
* ADVANCED: | |
* Return the object from the identity with the primary and class. | |
* Only return invalidated objects if requested. | |
*/ | |
public Object getFromIdentityMap(Object primaryKey, Class theClass, boolean shouldReturnInvalidatedObjects) { | |
return getFromIdentityMap(primaryKey, null, theClass, shouldReturnInvalidatedObjects, getSession().getDescriptor(theClass)); | |
} | |
/** | |
* INTERNAL: | |
* Return the object from the identity with the primary and class. | |
* Only return invalidated objects if requested. | |
*/ | |
public Object getFromIdentityMap(Object primaryKey, Object object, Class theClass, boolean shouldReturnInvalidatedObjects, ClassDescriptor descriptor) { | |
return getIdentityMapManager().getFromIdentityMap(primaryKey, theClass, shouldReturnInvalidatedObjects, descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Return the object from the local identity map with the primary and class. | |
* This avoids checking the parent cache for the unit of work. | |
*/ | |
public Object getFromLocalIdentityMap(Object primaryKey, Class theClass, boolean shouldReturnInvalidatedObjects, ClassDescriptor descriptor) { | |
return getIdentityMapManager().getFromIdentityMap(primaryKey, theClass, shouldReturnInvalidatedObjects, descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Return the object from the local identity map with the primary and class. | |
* This avoids checking the parent cache for the unit of work. | |
*/ | |
public Object getFromLocalIdentityMapWithDeferredLock(Object primaryKey, Class theClass, boolean shouldReturnInvalidatedObjects, ClassDescriptor descriptor){ | |
return getIdentityMapManager().getFromIdentityMapWithDeferredLock(primaryKey, theClass, shouldReturnInvalidatedObjects, descriptor); | |
} | |
/** | |
* ADVANCED: | |
* Return the object from the identity with the primary and class. | |
*/ | |
public Object getFromIdentityMap(Record rowContainingPrimaryKey, Class theClass) { | |
return getFromIdentityMap(extractPrimaryKeyFromRow(rowContainingPrimaryKey, theClass), theClass); | |
} | |
/** | |
* ADVANCED: | |
* Return the object from the identity with the primary and class. | |
* Only return invalidated objects if requested. | |
*/ | |
public Object getFromIdentityMap(Record rowContainingPrimaryKey, Class theClass, boolean shouldReturnInvalidatedObjects) { | |
return getFromIdentityMap(extractPrimaryKeyFromRow(rowContainingPrimaryKey, theClass), theClass, shouldReturnInvalidatedObjects); | |
} | |
/** | |
* ADVANCED: | |
* Query the cache in-memory. | |
* If the object is not found null is returned. | |
* If the expression is too complex an exception will be thrown. | |
*/ | |
public Object getFromIdentityMap(Expression selectionCriteria, Class theClass, Record translationRow) throws QueryException { | |
return getFromIdentityMap(selectionCriteria, theClass, translationRow, InMemoryQueryIndirectionPolicy.SHOULD_THROW_INDIRECTION_EXCEPTION); | |
} | |
/** | |
* ADVANCED: | |
* Query the cache in-memory. | |
* If the object is not found null is returned. | |
* If the expression is too complex an exception will be thrown. | |
*/ | |
public Object getFromIdentityMap(Expression selectionCriteria, Class theClass, Record translationRow, InMemoryQueryIndirectionPolicy valueHolderPolicy) throws QueryException { | |
int policy = 0; | |
if (valueHolderPolicy != null) { | |
policy = valueHolderPolicy.getPolicy(); | |
} | |
return getFromIdentityMap(selectionCriteria, theClass, translationRow, policy, false); | |
} | |
/** | |
* ADVANCED: | |
* Query the cache in-memory. | |
* If the object is not found null is returned. | |
* If the expression is too complex an exception will be thrown. | |
*/ | |
public Object getFromIdentityMap(Expression selectionCriteria, Class theClass, Record translationRow, int valueHolderPolicy) throws QueryException { | |
return getFromIdentityMap(selectionCriteria, theClass, translationRow, valueHolderPolicy, false); | |
} | |
/** | |
* INTERNAL: | |
* Query the cache in-memory. | |
* If the object is not found null is returned. | |
* If the expression is too complex an exception will be thrown. | |
*/ | |
public Object getFromIdentityMap(Expression selectionCriteria, Class theClass, Record translationRow, int valueHolderPolicy, boolean conforming) { | |
return getFromIdentityMap(selectionCriteria, theClass, translationRow, valueHolderPolicy, conforming, true, getSession().getDescriptor(theClass)); | |
} | |
/** | |
* INTERNAL: | |
* Query the cache in-memory. | |
* If the object is not found null is returned. | |
* If the expression is too complex an exception will be thrown. | |
*/ | |
public Object getFromIdentityMap(Expression selectionCriteria, Class theClass, Record translationRow, int valueHolderPolicy, boolean conforming, boolean shouldReturnInvalidatedObjects) { | |
return getFromIdentityMap(selectionCriteria, theClass, translationRow, valueHolderPolicy, conforming, shouldReturnInvalidatedObjects, getSession().getDescriptor(theClass)); | |
} | |
/** | |
* INTERNAL: | |
* Query the cache in-memory. | |
* If the object is not found null is returned. | |
* If the expression is too complex an exception will be thrown. | |
*/ | |
public Object getFromIdentityMap(Expression selectionCriteria, Class theClass, Record translationRow, int valueHolderPolicy, boolean conforming, boolean shouldReturnInvalidatedObjects, ClassDescriptor descriptor) { | |
return getIdentityMapManager().getFromIdentityMap(selectionCriteria, theClass, translationRow, valueHolderPolicy, conforming, shouldReturnInvalidatedObjects, descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Return the object from the identity with the primary and class. | |
*/ | |
public Object getFromIdentityMapWithDeferredLock(Object primaryKey, Class theClass, ClassDescriptor descriptor) { | |
return getFromIdentityMapWithDeferredLock(primaryKey, theClass, true, descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Return the object from the identity with the primary and class. | |
* Only return invalidated objects if requested | |
*/ | |
public Object getFromIdentityMapWithDeferredLock(Object primaryKey, Class theClass, boolean shouldReturnInvalidatedObjects, ClassDescriptor descriptor) { | |
return getIdentityMapManager().getFromIdentityMapWithDeferredLock(primaryKey, theClass, shouldReturnInvalidatedObjects, descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Get the IdentityMapManager for this IdentityMapAccessor | |
* This method should be used for all IdentityMapManager access since it may | |
* be overridden in sub classes. | |
*/ | |
public IdentityMapManager getIdentityMapManager() { | |
if (session.hasBroker()) { | |
return getSession().getBroker().getIdentityMapAccessorInstance().getIdentityMapManager(); | |
} | |
return identityMapManager; | |
} | |
/** | |
* INTERNAL: (public to allow test cases to check) | |
* Return the identity map for the class, if missing create a new one. | |
*/ | |
public IdentityMap getIdentityMap(Class theClass) { | |
ClassDescriptor descriptor = getSession().getDescriptor(theClass); | |
if (descriptor == null) { | |
throw ValidationException.missingDescriptor(theClass.toString()); | |
} | |
return getIdentityMap(descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Get the identity map for the given class from the IdentityMapManager | |
*/ | |
public IdentityMap getIdentityMap(ClassDescriptor descriptor) { | |
return getIdentityMap(descriptor, false); | |
} | |
/** | |
* INTERNAL: | |
* Get the identity map for the given class from the IdentityMapManager | |
*/ | |
public IdentityMap getIdentityMap(ClassDescriptor descriptor, boolean returnNullIfMissing) { | |
return getIdentityMapManager().getIdentityMap(descriptor, returnNullIfMissing); | |
} | |
/** | |
* 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. | |
*/ | |
public Object getQueryResult(ReadQuery query, List parameters, boolean checkExpiry) { | |
return getIdentityMapManager().getQueryResult(query, parameters, checkExpiry); | |
} | |
/** | |
* ADVANCED: | |
* Return the remaining life of this object. This method is associated with use of | |
* cache invalidation and returns the difference between the next expiry | |
* time of the object and its read time. The method will return 0 for invalidated objects. | |
*/ | |
public long getRemainingValidTime(Object object) { | |
Object primaryKey = getSession().getId(object); | |
ClassDescriptor descriptor = getSession().getDescriptor(object); | |
CacheKey key = getCacheKeyForObjectForLock(primaryKey, object.getClass(), descriptor); | |
if (key == null) { | |
throw QueryException.objectDoesNotExistInCache(object); | |
} | |
return descriptor.getCacheInvalidationPolicy().getRemainingValidTime(key); | |
} | |
/** | |
* INTERNAL: | |
* get the session associated with this IdentityMapAccessor | |
*/ | |
public AbstractSession getSession() { | |
return session; | |
} | |
/** | |
* INTERNAL: | |
* Get the wrapper object from the cache key associated with the given primary key, | |
* this is used for EJB. | |
*/ | |
public Object getWrapper(Object primaryKey, Class theClass) { | |
return getIdentityMapManager().getWrapper(primaryKey, theClass); | |
} | |
/** | |
* INTERNAL: | |
* Returns the single write Lock manager for this session | |
*/ | |
public WriteLockManager getWriteLockManager() { | |
return getIdentityMapManager().getWriteLockManager(); | |
} | |
/** | |
* ADVANCED: | |
* Extract the write lock value from the identity map. | |
*/ | |
public Object getWriteLockValue(Object object) { | |
return getWriteLockValue(getSession().getId(object), object.getClass()); | |
} | |
/** | |
* ADVANCED: | |
* Extract the write lock value from the identity map. | |
*/ | |
@Deprecated | |
public Object getWriteLockValue(Vector primaryKey, Class theClass) { | |
return getWriteLockValue(primaryKeyFromVector(primaryKey), theClass); | |
} | |
/** | |
* ADVANCED: | |
* Extract the write lock value from the identity map. | |
*/ | |
public Object getWriteLockValue(Object primaryKey, Class theClass) { | |
return getWriteLockValue(primaryKey, theClass, getSession().getDescriptor(theClass)); | |
} | |
/** | |
* ADVANCED: | |
* Extract the write lock value from the identity map. | |
*/ | |
public Object getWriteLockValue(Object primaryKey, Class theClass, ClassDescriptor descriptor) { | |
return getIdentityMapManager().getWriteLockValue(primaryKey, theClass, descriptor); | |
} | |
/** | |
* PUBLIC: | |
* Reset the entire object cache. | |
* <p> NOTE: be careful using this method. 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. | |
*/ | |
public void initializeAllIdentityMaps() { | |
getSession().log(SessionLog.FINER, SessionLog.CACHE, "initialize_all_identitymaps"); | |
getIdentityMapManager().initializeIdentityMaps(); | |
} | |
/** | |
* PUBLIC: | |
* Reset the identity map for only the instances of the class. | |
* For inheritance the user must make sure that they only use the root class. | |
* Caution must be used in doing this to ensure that the objects within the identity map | |
* are not referenced from other objects of other classes or from the application. | |
*/ | |
public void initializeIdentityMap(Class theClass) { | |
getSession().log(SessionLog.FINER, SessionLog.CACHE, "initialize_identitymap", theClass); | |
getIdentityMapManager().initializeIdentityMap(theClass); | |
} | |
/** | |
* PUBLIC: | |
* Reset the entire local object 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. | |
*/ | |
public void initializeIdentityMaps() { | |
getSession().log(SessionLog.FINER, SessionLog.CACHE, "initialize_identitymaps"); | |
getIdentityMapManager().initializeIdentityMaps(); | |
if (getSession().hasCommitManager()) { | |
getSession().getCommitManager().reinitialize(); | |
} | |
} | |
/** | |
* ADVANCED: | |
* Set an object to be invalid in the cache. | |
* If the object does not exist in the cache, this method will return | |
* without any action. | |
*/ | |
public void invalidateObject(Object object) { | |
invalidateObject(object, false); | |
} | |
/** | |
* ADVANCED: | |
* Set an object to be invalid in the cache. | |
* @param invalidateCluster if true the invalidation will be broadcast to each server in the cluster. | |
*/ | |
public void invalidateObject(Object object, boolean invalidateCluster) { | |
invalidateObject(getSession().getId(object), object.getClass(), invalidateCluster); | |
} | |
/** | |
* ADVANCED: | |
* Set an object to be invalid in the cache. | |
* If the object does not exist in the cache, this method will return | |
* without any action. | |
*/ | |
@Deprecated | |
public void invalidateObject(Vector primaryKey, Class theClass, boolean invalidateCluster) { | |
invalidateObject(primaryKeyFromVector(primaryKey), theClass, invalidateCluster); | |
} | |
/** | |
* ADVANCED: | |
* Set an object to be invalid in the cache. | |
* If the object does not exist in the cache, this method will return | |
* without any action. | |
*/ | |
@Deprecated | |
public void invalidateObject(Vector primaryKey, Class theClass) { | |
invalidateObject(primaryKeyFromVector(primaryKey), theClass); | |
} | |
/** | |
* ADVANCED: | |
* Set an object to be invalid in the cache. | |
* If the object does not exist in the cache, this method will return | |
* without any action. | |
*/ | |
public void invalidateObject(Object primaryKey, Class theClass) { | |
invalidateObject(primaryKey, theClass, false); | |
} | |
/** | |
* ADVANCED: | |
* Set an object to be invalid in the cache. | |
* @param invalidateCluster if true the invalidation will be broadcast to each server in the cluster. | |
*/ | |
public void invalidateObject(Object primaryKey, Class theClass, boolean invalidateCluster) { | |
if (primaryKey == null) { | |
return; | |
} | |
ClassDescriptor descriptor = getSession().getDescriptor(theClass); | |
//forward the call to getCacheKeyForObject locally in case subclasses overload | |
CacheKey key = getCacheKeyForObjectForLock(primaryKey, theClass, descriptor); | |
if (key != null) { | |
key.setInvalidationState(CacheKey.CACHE_KEY_INVALID); | |
} | |
if (invalidateCluster) { | |
CommandManager rcm = getSession().getCommandManager(); | |
if (rcm != null) { | |
UnitOfWorkChangeSet changeSet = new UnitOfWorkChangeSet(getSession()); | |
ObjectChangeSet objectChangeSet = new ObjectChangeSet(primaryKey, descriptor, null, changeSet, false); | |
objectChangeSet.setSynchronizationType(ClassDescriptor.INVALIDATE_CHANGED_OBJECTS); | |
changeSet.getAllChangeSets().put(objectChangeSet, objectChangeSet); | |
MergeChangeSetCommand command = new MergeChangeSetCommand(); | |
command.setChangeSet(changeSet); | |
rcm.propagateCommand(command); | |
} | |
} | |
} | |
/** | |
* ADVANCED: | |
* Set an object to be invalid in the cache. | |
* If the object does not exist in the cache, this method will return | |
* without any action. | |
*/ | |
public void invalidateObject(Record rowContainingPrimaryKey, Class theClass) { | |
invalidateObject(rowContainingPrimaryKey, theClass, false); | |
} | |
/** | |
* ADVANCED: | |
* Set an object to be invalid in the cache. | |
* @param invalidateCluster if true the invalidation will be broadcast to each server in the cluster. | |
*/ | |
public void invalidateObject(Record rowContainingPrimaryKey, Class theClass, boolean invalidateCluster) { | |
invalidateObject(extractPrimaryKeyFromRow(rowContainingPrimaryKey, theClass), theClass, invalidateCluster); | |
} | |
/** | |
* ADVANCED: | |
* Set all of the objects from the given Expression to be invalid in the cache. | |
*/ | |
public void invalidateObjects(Expression selectionCriteria) { | |
invalidateObjects(selectionCriteria, selectionCriteria.getBuilder().getQueryClass(), new DatabaseRecord(0), true); | |
} | |
/** | |
* ADVANCED: | |
* Queries the cache in-memory with the passed in criteria and invalidates matching Objects. | |
* If the expression is too complex either all or none object of theClass invalidated (depending on shouldInvalidateOnException value). | |
* @param selectionCriteria Expression selecting the Objects to be returned | |
* @param theClass Class to be considered | |
* @param translationRow Record | |
* @param shouldInvalidateOnException boolean indicates weather to invalidate the object if conform threw exception. | |
*/ | |
public void invalidateObjects(Expression selectionCriteria, Class theClass, Record translationRow, boolean shouldInvalidateOnException) { | |
getIdentityMapManager().invalidateObjects(selectionCriteria, theClass, translationRow, shouldInvalidateOnException); | |
} | |
/** | |
* ADVANCED: | |
* Set all of the objects in the given collection to be invalid in the cache. | |
* This method will take no action for any objects in the collection that do not exist in the cache. | |
*/ | |
public void invalidateObjects(Collection collection) { | |
invalidateObjects(collection, false); | |
} | |
/** | |
* ADVANCED: | |
* Set all of the objects in the given collection to be invalid in the cache. | |
* @param invalidateCluster if true the invalidation will be broadcast to each server in the cluster. | |
*/ | |
public void invalidateObjects(Collection collection, boolean invalidateCluster) { | |
Iterator iterator = collection.iterator(); | |
while (iterator.hasNext()) { | |
invalidateObject(iterator.next(), invalidateCluster); | |
} | |
} | |
/** | |
* ADVANCED: | |
* Set all of the objects of a specific class to be invalid in the cache. | |
* Will set the recurseAndInvalidateToParentRoot flag on inheritance to true. | |
*/ | |
public void invalidateClass(Class myClass) { | |
invalidateClass(myClass, true); | |
} | |
/** | |
* ADVANCED: | |
* Set all of the objects of a specific class to be invalid in the cache. | |
* User can set the recurse flag to false if they do not want to invalidate | |
* all the classes within an inheritance tree and instead invalidate the subtree rooted at myClass. | |
* @param myClass - the class where we start invalidation | |
* @param recurseAndInvalidateToParentRoot - default is true where we invalidate | |
* up the inheritance tree to the root descriptor | |
*/ | |
public void invalidateClass(Class myClass, boolean recurseAndInvalidateToParentRoot) { | |
//forward the call to getIdentityMap locally in case subclasses overload | |
IdentityMap identityMap = this.getIdentityMap(myClass); // will always return the root IdentityMap | |
//bug 227430: Deadlock in IdentityMapAccessor. | |
//removed synchronization that would result in deadlock | |
//no need to synchronize as changes to identity map will not aversely affect this code | |
//bug 275724: IdentityMapAccessor.invalidateClass() should not check ReadLock when invalidating | |
Enumeration keys = identityMap.keys(false); // do not check readlock | |
while (keys.hasMoreElements()) { | |
CacheKey key = (CacheKey)keys.nextElement(); | |
Object obj = key.getObject(); | |
// 312503: When recurse is false we also invalidate all assignable implementing subclasses of [obj] | |
if (recurseAndInvalidateToParentRoot || ((obj != null) && (null != myClass) && myClass.isAssignableFrom(obj.getClass()))) { | |
key.setInvalidationState(CacheKey.CACHE_KEY_INVALID); | |
} | |
} | |
invalidateQueryCache(myClass); | |
} | |
/** | |
* Invalidate/remove any results for the class from the query cache. | |
* This is used to invalidate the query cache on any change. | |
*/ | |
public void invalidateQueryCache(Class classThatChanged) { | |
getIdentityMapManager().invalidateQueryCache(classThatChanged); | |
} | |
/** | |
* ADVANCED: | |
* Set all of the objects from all identity maps to be invalid in the cache. | |
*/ | |
public void invalidateAll() { | |
Iterator identiyMapClasses = getIdentityMapManager().getIdentityMapClasses(); | |
while (identiyMapClasses.hasNext()) { | |
invalidateClass((Class) identiyMapClasses.next()); | |
} | |
} | |
/** | |
* ADVANCED: | |
* Return if this object is valid in the cache. | |
*/ | |
public boolean isValid(Object object) { | |
return isValid(getSession().getId(object), object.getClass()); | |
} | |
/** | |
* ADVANCED: | |
* Return if this object is valid in the cache. | |
*/ | |
@Deprecated | |
public boolean isValid(Vector primaryKey, Class theClass) { | |
return isValid(primaryKeyFromVector(primaryKey), theClass); | |
} | |
/** | |
* ADVANCED: | |
* Return if this object is valid in the cache. | |
*/ | |
public boolean isValid(Object primaryKey, Class theClass) { | |
ClassDescriptor descriptor = getSession().getDescriptor(theClass); | |
//forward the call to getCacheKeyForObject locally in case subclasses overload | |
CacheKey key = getCacheKeyForObjectForLock(primaryKey, theClass, descriptor); | |
if (key == null) { | |
throw QueryException.classPkDoesNotExistInCache(theClass, primaryKey); | |
} | |
return !descriptor.getCacheInvalidationPolicy().isInvalidated(key); | |
} | |
/** | |
* ADVANCED: | |
* Return if this object is valid in the cache. | |
*/ | |
public boolean isValid(Record rowContainingPrimaryKey, Class theClass) { | |
return isValid(extractPrimaryKeyFromRow(rowContainingPrimaryKey, theClass), theClass); | |
} | |
/** | |
* PUBLIC: | |
* Used to print all the objects in the identity map of the passed in class. | |
* The output of this method will be logged to this session's SessionLog at SEVERE level. | |
*/ | |
public void printIdentityMap(Class businessClass) { | |
if (getSession().shouldLog(SessionLog.SEVERE, SessionLog.CACHE)) { | |
getIdentityMapManager().printIdentityMap(businessClass); | |
} | |
} | |
/** | |
* PUBLIC: | |
* Used to print all the objects in every identity map in this session. | |
* The output of this method will be logged to this session's SessionLog at SEVERE level. | |
*/ | |
public void printIdentityMaps() { | |
if (getSession().shouldLog(SessionLog.SEVERE, SessionLog.CACHE)) { | |
getIdentityMapManager().printIdentityMaps(); | |
} | |
} | |
/** | |
* PUBLIC: | |
* Used to print all the locks in every identity map in this session. | |
* The output of this method will be logged to this session's SessionLog at FINEST level. | |
*/ | |
public void printIdentityMapLocks() { | |
if (getSession().shouldLog(SessionLog.SEVERE, SessionLog.CACHE)) { | |
getIdentityMapManager().printLocks(); | |
} | |
} | |
/** | |
* ADVANCED: | |
* Register the object with the cache. | |
* The object must always be registered with its version number if optimistic locking is used. | |
*/ | |
public Object putInIdentityMap(Object object) { | |
return putInIdentityMap(object, getSession().getId(object)); | |
} | |
/** | |
* ADVANCED: | |
* Register the object with the cache. | |
* The object must always be registered with its version number if optimistic locking is used. | |
*/ | |
@Deprecated | |
public Object putInIdentityMap(Object object, Vector key) { | |
return putInIdentityMap(object, primaryKeyFromVector(key)); | |
} | |
/** | |
* ADVANCED: | |
* Register the object with the cache. | |
* The object must always be registered with its version number if optimistic locking is used. | |
*/ | |
public Object putInIdentityMap(Object object, Object key) { | |
return putInIdentityMap(object, key, null); | |
} | |
/** | |
* ADVANCED: | |
* Register the object with the cache. | |
* The object must always be registered with its version number if optimistic locking is used. | |
*/ | |
@Deprecated | |
public Object putInIdentityMap(Object object, Vector key, Object writeLockValue) { | |
return putInIdentityMap(object, key, writeLockValue, 0); | |
} | |
/** | |
* ADVANCED: | |
* Register the object with the cache. | |
* The object must always be registered with its version number if optimistic locking is used. | |
*/ | |
public Object putInIdentityMap(Object object, Object key, Object writeLockValue) { | |
return putInIdentityMap(object, key, writeLockValue, 0); | |
} | |
/** | |
* ADVANCED: | |
* Register the object with the cache. | |
* The object must always be registered with its version number if optimistic locking is used. | |
* The readTime may also be included in the cache key as it is constructed. | |
*/ | |
@Deprecated | |
public Object putInIdentityMap(Object object, Vector key, Object writeLockValue, long readTime) { | |
return putInIdentityMap(object, primaryKeyFromVector(key), writeLockValue, readTime); | |
} | |
/** | |
* ADVANCED: | |
* Register the object with the cache. | |
* The object must always be registered with its version number if optimistic locking is used. | |
* The readTime may also be included in the cache key as it is constructed. | |
*/ | |
public Object putInIdentityMap(Object object, Object key, Object writeLockValue, long readTime) { | |
ClassDescriptor descriptor = getSession().getDescriptor(object); | |
return putInIdentityMap(object, key, writeLockValue, readTime, descriptor); | |
} | |
/** | |
* ADVANCED: | |
* Register the object with the cache. | |
* The object must always be registered with its version number if optimistic locking is used. | |
* The readTime may also be included in the cache key as it is constructed. | |
*/ | |
public Object putInIdentityMap(Object object, Object key, Object writeLockValue, long readTime, ClassDescriptor descriptor) { | |
CacheKey cacheKey = internalPutInIdentityMap(object, key, writeLockValue, readTime, descriptor); | |
if (cacheKey == null) { | |
return null; | |
} | |
return cacheKey.getObject(); | |
} | |
/** | |
* 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. | |
*/ | |
public void putQueryResult(ReadQuery query, List parameters, Object results) { | |
getIdentityMapManager().putQueryResult(query, parameters, results); | |
} | |
/** | |
* Index the cache key by the index values. | |
*/ | |
public void putCacheKeyByIndex(CacheIndex index, CacheId indexValues, CacheKey cacheKey, ClassDescriptor descriptor) { | |
getIdentityMapManager().putCacheKeyByIndex(index, indexValues, cacheKey, descriptor); | |
} | |
/** | |
* Return the cache key for the cache index or null if not found. | |
*/ | |
public CacheKey getCacheKeyByIndex(CacheIndex index, CacheId indexValues, boolean shouldCheckExpiry, ClassDescriptor descriptor) { | |
return getIdentityMapManager().getCacheKeyByIndex(index, indexValues, shouldCheckExpiry, descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Register the object with the cache. | |
* The object must always be registered with its version number if optimistic locking is used. | |
* The readTime may also be included in the cache key as it is constructed. | |
* Return the cache-key. | |
*/ | |
public CacheKey internalPutInIdentityMap(Object object, Object key, Object writeLockValue, long readTime, ClassDescriptor descriptor) { | |
return getIdentityMapManager().putInIdentityMap(object, key, writeLockValue, readTime, descriptor); | |
} | |
/** | |
* INTERNAL: | |
* Lock the entire cache if the cache isolation requires. | |
* By default concurrent reads and writes are allowed. | |
* By write, unit of work merge is meant. | |
*/ | |
public void releaseWriteLock() { | |
getIdentityMapManager().releaseWriteLock(); | |
} | |
/** | |
* ADVANCED: | |
* Remove the object from the object cache. | |
* Caution should be used when calling to avoid violating object identity. | |
* The application should only call this is it knows that no references to the object exist. | |
*/ | |
public Object removeFromIdentityMap(Object object) { | |
Class theClass = object.getClass(); | |
return removeFromIdentityMap(getSession().getId(object), theClass, getSession().getDescriptor(theClass), object); | |
} | |
/** | |
* ADVANCED: | |
* Remove the object from the object cache. | |
*/ | |
@Deprecated | |
public Object removeFromIdentityMap(Vector key, Class theClass) { | |
return removeFromIdentityMap(primaryKeyFromVector(key), theClass); | |
} | |
/** | |
* ADVANCED: | |
* Remove the object from the object cache. | |
*/ | |
public Object removeFromIdentityMap(Object key, Class theClass) { | |
ClassDescriptor descriptor = getSession().getDescriptor(theClass); | |
if (descriptor == null){ | |
return null; | |
} | |
return removeFromIdentityMap(key, theClass, descriptor, null); | |
} | |
/** | |
* INTERNAL: | |
* Remove the object from the object cache. | |
*/ | |
public Object removeFromIdentityMap(Object key, Class theClass, ClassDescriptor descriptor, Object object) { | |
return getIdentityMapManager().removeFromIdentityMap(key, theClass, descriptor, object); | |
} | |
/** | |
* INTERNAL: | |
* Set the IdentityMapManager for this IdentityMapAccessor | |
*/ | |
public void setIdentityMapManager(IdentityMapManager identityMapManager) { | |
this.identityMapManager = identityMapManager; | |
} | |
/** | |
* INTERNAL: | |
* Update the wrapper object the cache key associated with the given primary key, | |
* this is used for EJB. | |
*/ | |
public void setWrapper(Object primaryKey, Class theClass, Object wrapper) { | |
getIdentityMapManager().setWrapper(primaryKey, theClass, wrapper); | |
} | |
/** | |
* ADVANCED: | |
* Update the write lock value in the cache. | |
*/ | |
public void updateWriteLockValue(Object object, Object writeLockValue) { | |
updateWriteLockValue(getSession().getId(object), object.getClass(), writeLockValue); | |
} | |
/** | |
* ADVANCED: | |
* Update the write lock value in the cache. | |
*/ | |
@Deprecated | |
public void updateWriteLockValue(Vector primaryKey, Class theClass, Object writeLockValue) { | |
updateWriteLockValue(primaryKeyFromVector(primaryKey), theClass, writeLockValue); | |
} | |
/** | |
* ADVANCED: | |
* Update the write lock value in the cache. | |
*/ | |
public void updateWriteLockValue(Object primaryKey, Class theClass, Object writeLockValue) { | |
getIdentityMapManager().setWriteLockValue(primaryKey, theClass, writeLockValue); | |
} | |
/** | |
* INTERNAL: | |
* This can be used to help debugging an object identity problem. | |
* An object identity problem is when an object in the cache references an object not in the cache. | |
* This method will validate that all cached objects are in a correct state. | |
*/ | |
public void validateCache() { | |
//pass certain calls to this in order to allow subclasses to implement own behavior | |
getSession().log(SessionLog.FINER, SessionLog.CACHE, "validate_cache"); | |
// This define an inner class for process the iteration operation, don't be scared, its just an inner class. | |
DescriptorIterator iterator = new DescriptorIterator() { | |
public void iterate(Object object) { | |
if (!containsObjectInIdentityMap(IdentityMapAccessor.this.session.getDescriptor(object.getClass()).getObjectBuilder().extractPrimaryKeyFromObject(object, IdentityMapAccessor.this.getSession()), object.getClass())) { | |
IdentityMapAccessor.this.session.log(SessionLog.FINEST, SessionLog.CACHE, "stack_of_visited_objects_that_refer_to_the_corrupt_object", getVisitedStack()); | |
IdentityMapAccessor.this.session.log(SessionLog.FINER, SessionLog.CACHE, "corrupt_object_referenced_through_mapping", getCurrentMapping()); | |
IdentityMapAccessor.this.session.log(SessionLog.FINER, SessionLog.CACHE, "corrupt_object", object); | |
} | |
} | |
}; | |
iterator.setSession(getSession()); | |
Iterator descriptors = getSession().getDescriptors().values().iterator(); | |
while (descriptors.hasNext()) { | |
ClassDescriptor descriptor = (ClassDescriptor)descriptors.next(); | |
IdentityMap cache = getIdentityMap(descriptor, true); | |
if (cache != null) { | |
for (Enumeration mapEnum = cache.elements(); mapEnum.hasMoreElements();) { | |
iterator.startIterationOn(mapEnum.nextElement()); | |
} | |
} | |
} | |
} | |
} |