Package com.arjuna.ats.internal.arjuna.objectstore

Class HashedActionStore

java.lang.Object

com.arjuna.ats.arjuna.objectstore.ObjectStore

com.arjuna.ats.internal.arjuna.objectstore.FileSystemStore

com.arjuna.ats.internal.arjuna.objectstore.ShadowingStore

com.arjuna.ats.internal.arjuna.objectstore.ShadowNoFileLockStore

com.arjuna.ats.internal.arjuna.objectstore.HashedStore

com.arjuna.ats.internal.arjuna.objectstore.HashedActionStore

All Implemented Interfaces:

BaseStore, ObjectStoreAPI, ParticipantStore, RecoveryStore, TxLog

public class HashedActionStore
extends HashedStore

The basic action store implementations store the object states in a separate file within the same directory in the object store, determined by the object's type. However, as the number of file entries within the directory increases, so does the search time for finding a specific file. The HashStore implementation hashes object states over many different sub-directories to attempt to keep the number of files in a given directory low, thus improving performance as the number of object states grows. Currently the hash number is set for both user hashed stores and action hashed stores.

Since:

JTS 2.1.

Version:

$Id: HashedActionStore.java 2342 2006-03-30 13:06:17Z $

Author:

Mark Little (mark@arjuna.com)

Field Summary

Fields inherited from class com.arjuna.ats.internal.arjuna.objectstore.HashedStore

DEFAULT_NUMBER_DIRECTORIES, SHADOWCHAR

Fields inherited from class com.arjuna.ats.internal.arjuna.objectstore.ShadowingStore

HIDDINGCHAR

Fields inherited from class com.arjuna.ats.internal.arjuna.objectstore.FileSystemStore

doSync, scanZeroLengthFiles, syncWrites

Fields inherited from class com.arjuna.ats.arjuna.objectstore.ObjectStore

_objectStoreRoot, shareStatus

Constructor Summary

Constructors

Constructor	Description
HashedActionStore(ObjectStoreEnvironmentBean objectStoreEnvironmentBean)

Method Summary

Methods inherited from class com.arjuna.ats.internal.arjuna.objectstore.HashedStore

allObjUids, genPathName, truncate

Methods inherited from class com.arjuna.ats.internal.arjuna.objectstore.ShadowNoFileLockStore

lock, unlock

Methods inherited from class com.arjuna.ats.internal.arjuna.objectstore.ShadowingStore

commit_state, currentState, hide_state, read_state, remove_state, reveal_state, revealedId, write_state

Methods inherited from class com.arjuna.ats.internal.arjuna.objectstore.FileSystemStore

addToCache, allTypes, allTypes, closeAndUnlock, createHierarchy, exists, getStoreName, openAndLock, read_committed, read_uncommitted, remove_committed, remove_uncommitted, removeFromCache, removeFromCache, renameFromTo, renameFromToInternal, supressEntry, synchronousWrites, write_committed, write_uncommitted

Methods inherited from class com.arjuna.ats.arjuna.objectstore.ObjectStore

allObjUids, fullCommitNeeded, initialise, isType, locateStore, shareState, start, stop, storeDir, storeRoot, sync

Methods inherited from class java.lang.Object

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

Constructor Details

HashedActionStore

public HashedActionStore(ObjectStoreEnvironmentBean objectStoreEnvironmentBean)
                  throws ObjectStoreException

Throws:

ObjectStoreException