Package net.sf.ehcache.transaction.local

Class LocalTransactionStore

java.lang.Object

net.sf.ehcache.store.AbstractStore

net.sf.ehcache.transaction.AbstractTransactionStore

net.sf.ehcache.transaction.local.LocalTransactionStore

All Implemented Interfaces:

Store, TerracottaStore

public class LocalTransactionStore
extends AbstractTransactionStore

A Store implementation with support for local transactions

Author:

Ludovic Orban

Field Summary

Fields inherited from class net.sf.ehcache.transaction.AbstractTransactionStore

underlyingStore

Fields inherited from class net.sf.ehcache.store.AbstractStore

attributeExtractors, searchManager

Fields inherited from interface net.sf.ehcache.store.Store

CLUSTER_COHERENT, NODE_COHERENT

Constructor Summary

Constructors

Constructor	Description
LocalTransactionStore(TransactionController transactionController, TransactionIDFactory transactionIdFactory, SoftLockManager softLockManager, Ehcache cache, Store store, ElementValueComparator comparator)	Create a new LocalTransactionStore instance

Method Summary

Modifier and Type	Method	Description
boolean	containsKey(java.lang.Object key)	A check to see if a key is in the Store.
void	dispose()	Prepares for shutdown.
Element	get(java.lang.Object key)	Gets an item from the cache.
java.util.List	getKeys()	Gets an Array of the keys for all elements in the disk store.
Element	getQuiet(java.lang.Object key)	Gets an Element from the Store, without updating statistics
int	getSize()	Returns the current local store size
int	getTerracottaClusteredSize()	Returns the current Terracotta clustered store size
boolean	put(Element element)	Puts an item into the store.
Element	putIfAbsent(Element element)	Put an element in the store if no element is currently mapped to the elements key.
boolean	putWithWriter(Element element, CacheWriterManager writerManager)	Puts an item into the store and the cache writer manager in an atomic operation
java.util.Set<TransactionID>	recover()	Recover and resolve all known soft locks
Element	remove(java.lang.Object key)	Removes an item from the cache.
void	removeAll()	Remove all of the elements from the store.
Element	removeElement(Element element, ElementValueComparator comparator)	Remove the Element mapped to the key for the supplied element if the value of the supplied Element is equal to the value of the cached Element.
Element	removeWithWriter(java.lang.Object key, CacheWriterManager writerManager)	Removes an item from the store and the cache writer manager in an atomic operation.
Element	replace(Element element)	Replace the cached element only if an Element is currently cached for this key
boolean	replace(Element old, Element element, ElementValueComparator comparator)	Replace the cached element only if the value of the current Element is equal to the value of the supplied old Element.

Methods inherited from class net.sf.ehcache.transaction.AbstractTransactionStore

bufferFull, containsKeyInMemory, containsKeyOffHeap, containsKeyOnDisk, createWriteBehind, executeQuery, expireElements, flush, getInMemoryEvictionPolicy, getInMemorySize, getInMemorySizeInBytes, getInternalContext, getLocalKeys, getMBean, getOffHeapSize, getOffHeapSizeInBytes, getOldElement, getOnDiskSize, getOnDiskSizeInBytes, getSearchAttribute, getSearchAttributes, getStatus, getTransactionalMode, hasAbortedSizeOf, isCacheCoherent, isClusterCoherent, isNodeCoherent, notifyCacheEventListenersChanged, quickClear, quickSize, setAttributeExtractors, setInMemoryEvictionPolicy, setNodeCoherent, unsafeGet, waitUntilClusterCoherent

Methods inherited from class net.sf.ehcache.store.AbstractStore

addStoreListener, getAll, getAllQuiet, getEventListenerList, putAll, recalculateSize, removeAll, removeStoreListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.ehcache.store.Store

addStoreListener, getAll, getAllQuiet, putAll, recalculateSize, removeAll, removeStoreListener

Constructor Detail

LocalTransactionStore

public LocalTransactionStore(TransactionController transactionController,
                             TransactionIDFactory transactionIdFactory,
                             SoftLockManager softLockManager,
                             Ehcache cache,
                             Store store,
                             ElementValueComparator comparator)

Create a new LocalTransactionStore instance

Parameters:

transactionController - the TransactionController

softLockManager - the SoftLockManager

cache - the cache

store - the underlying store

comparator - the element value comparator

Method Detail

dispose

public void dispose()

Description copied from class: AbstractTransactionStore

Prepares for shutdown.

Specified by:

dispose in interface Store

Overrides:

dispose in class AbstractTransactionStore

recover

public java.util.Set<TransactionID> recover()

Recover and resolve all known soft locks

Returns:

a set of transaction IDs that were recovered

put

public boolean put(Element element)
            throws CacheException

Puts an item into the store.

Returns:

true if this is a new put for the key or element is null. Returns false if it was an update.

Throws:

CacheException

getQuiet

public Element getQuiet(java.lang.Object key)

Gets an Element from the Store, without updating statistics

Returns:

The element

get

public Element get(java.lang.Object key)

Gets an item from the cache.

remove

public Element remove(java.lang.Object key)

Removes an item from the cache.

getKeys

public java.util.List getKeys()

Gets an Array of the keys for all elements in the disk store.

Returns:

An List of Serializable keys

getSize

public int getSize()

Returns the current local store size

Returns:

the count of the Elements in the Store on the local machine

getTerracottaClusteredSize

public int getTerracottaClusteredSize()

Returns the current Terracotta clustered store size

Returns:

the count of the Elements in the Store across the cluster

containsKey

public boolean containsKey(java.lang.Object key)

A check to see if a key is in the Store.

Parameters:

key - The Element key

Returns:

true if found. No check is made to see if the Element is expired. 1.2

removeAll

public void removeAll()
               throws CacheException

Remove all of the elements from the store.

If there are registered CacheEventListeners they are notified of the expiry or removal of the Element as each is removed.

Throws:

CacheException

putWithWriter

public boolean putWithWriter(Element element,
                             CacheWriterManager writerManager)
                      throws CacheException

Puts an item into the store and the cache writer manager in an atomic operation

Returns:

true if this is a new put for the key or element is null. Returns false if it was an update.

Throws:

CacheException

removeWithWriter

public Element removeWithWriter(java.lang.Object key,
                                CacheWriterManager writerManager)
                         throws CacheException

Removes an item from the store and the cache writer manager in an atomic operation.

Throws:

CacheException

putIfAbsent

public Element putIfAbsent(Element element)
                    throws java.lang.NullPointerException

Put an element in the store if no element is currently mapped to the elements key.

Parameters:

element - element to be added

Returns:

the element previously cached for this key, or null if none.

Throws:

java.lang.NullPointerException - if the element is null, or has a null key

removeElement

public Element removeElement(Element element,
                             ElementValueComparator comparator)
                      throws java.lang.NullPointerException

Remove the Element mapped to the key for the supplied element if the value of the supplied Element is equal to the value of the cached Element. This is a CAS operation. It is consistent even against a distributed cache that is not coherent. If the old value is stale when this operation is attempted the remove does not take place.

Parameters:

element - Element to be removed

comparator - ElementValueComparator to use to compare elements

Returns:

the Element removed or null if no Element was removed

Throws:

java.lang.NullPointerException - if the element is null, or has a null key

replace

public boolean replace(Element old,
                       Element element,
                       ElementValueComparator comparator)
                throws java.lang.NullPointerException,
                       java.lang.IllegalArgumentException

Replace the cached element only if the value of the current Element is equal to the value of the supplied old Element.

Parameters:

old - Element to be test against

element - Element to be cached

comparator - ElementValueComparator to use to compare elements

Returns:

true is the Element was replaced

Throws:

java.lang.NullPointerException - if the either Element is null or has a null key

java.lang.IllegalArgumentException - if the two Element keys are non-null but not equal

replace

public Element replace(Element element)
                throws java.lang.NullPointerException

Replace the cached element only if an Element is currently cached for this key

Parameters:

element - Element to be cached

Returns:

the Element previously cached for this key, or null if no Element was cached

Throws:

java.lang.NullPointerException - if the Element is null or has a null key