org.jboss.stm.internal.optimistic

Class OptimisticLock

java.lang.Object

com.arjuna.ats.arjuna.StateManager

com.arjuna.ats.txoj.Lock

org.jboss.stm.internal.optimistic.OptimisticLock

public class OptimisticLock
extends Lock

Instances of this class (or derived user classes) are used when trying to set a lock. The default implementation provides a single-write/multiple-reader policy. However, by overridding the appropriate methods, other, type-specific concurrency control locks can be implemented.

Since:

JTS 1.0.

Version:

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

Author:

Mark Little (mark@arjuna.com)

Field Summary

Fields inherited from class com.arjuna.ats.arjuna.StateManager

modifyingActions, objectModel, objectUid, usingActions

Constructor Summary

Constructors

Constructor and Description
OptimisticLock()
OptimisticLock(int lm)
OptimisticLock(Uid storeId)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	conflictsWith(Lock otherLock) Implementation of Lock conflict check.
String	type() Overrides StateManager.type()

Methods inherited from class com.arjuna.ats.txoj.Lock

changeHierarchy, equals, equals, finalize, getAllOwners, getCurrentOwner, getCurrentStatus, getLink, getLockMode, modifiesObject, print, propagate, restore_state, save_state, setLink, toString

Methods inherited from class com.arjuna.ats.arjuna.StateManager

activate, activate, cleanup, createLists, deactivate, deactivate, deactivate, destroy, disable, forgetAction, get_uid, getMutex, getObjectModel, getStore, getStoreRoot, loadObjectState, lockMutex, modified, objectType, packHeader, persist, rememberAction, setStatus, setupStore, setupStore, setupStore, status, terminate, tryLockMutex, unlockMutex, unpackHeader

Methods inherited from class java.lang.Object

clone, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

OptimisticLock

public OptimisticLock()

OptimisticLock

public OptimisticLock(int lm)

OptimisticLock

public OptimisticLock(Uid storeId)

Method Detail

conflictsWith

public boolean conflictsWith(Lock otherLock)

Implementation of Lock conflict check. Returns TRUE if there is conflict FALSE otherwise. Does not take account of relationship in the atomic action hierarchy since this is a function of LockManager.

Overrides:

conflictsWith in class Lock

Returns:

true if this lock conflicts with the parameter, false otherwise.

type

public String type()

Overrides StateManager.type()

Overrides:

type in class Lock