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WebSphereUowTransactionManager (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.transaction.jta
Class WebSphereUowTransactionManager

java.lang.Object
  org.springframework.transaction.support.AbstractPlatformTransactionManager
      org.springframework.transaction.jta.JtaTransactionManager
          org.springframework.transaction.jta.WebSphereUowTransactionManager

All Implemented Interfaces:

Serializable, InitializingBean, TransactionFactory, PlatformTransactionManager, CallbackPreferringPlatformTransactionManager

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public class WebSphereUowTransactionManager
extends JtaTransactionManager
implements CallbackPreferringPlatformTransactionManager

WebSphere-specific PlatformTransactionManager implementation that delegates to a UOWManager instance, obtained from WebSphere's JNDI environment. This allows Spring to leverage the full power of the WebSphere transaction coordinator, including transaction suspension, in a manner that is perfectly compliant with officially supported WebSphere API.

The CallbackPreferringPlatformTransactionManager interface implemented by this class indicates that callers should preferably pass in a TransactionCallback through the execute(org.springframework.transaction.TransactionDefinition, org.springframework.transaction.support.TransactionCallback) method, which will be handled through the callback-based WebSphere UOWManager API instead of through standard JTA API (UserTransaction / TransactionManager). This avoids the use of the non-public javax.transaction.TransactionManager API on WebSphere, staying within supported WebSphere API boundaries.

This transaction manager implementation derives from Spring's standard JtaTransactionManager, inheriting the capability to support programmatic transaction demarcation via getTransaction / commit / rollback calls through a JTA UserTransaction handle, for callers that do not use the TransactionCallback-based execute(org.springframework.transaction.TransactionDefinition, org.springframework.transaction.support.TransactionCallback) method. However, transaction suspension is not supported in this getTransaction style (unless you explicitly specify a JtaTransactionManager.setTransactionManager(javax.transaction.TransactionManager) reference, despite the official WebSphere recommendations). Use the execute(org.springframework.transaction.TransactionDefinition, org.springframework.transaction.support.TransactionCallback) style for any code that might require transaction suspension.

This transaction manager is compatible with WebSphere 7.0 as well as recent WebSphere 6.0.x and 6.1.x versions. Check the documentation for your specific WebSphere version to find out whether UOWManager support is available. If it is not available, consider using Spring's standard JtaTransactionManager class, if necessary specifying the WebSphereTransactionManagerFactoryBean as "transactionManager" through the corresponding bean property. However, note that transaction suspension is not officially supported in such a scenario (despite it being known to work properly).

The default JNDI location for the UOWManager is "java:comp/websphere/UOWManager". If the location happens to differ according to your WebSphere documentation, simply specify the actual location through this transaction manager's "uowManagerName" bean property.

Since:

2.1

Author:

Juergen Hoeller

See Also:

setUowManager(com.ibm.wsspi.uow.UOWManager), setUowManagerName(java.lang.String), UOWManager, Serialized Form

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Nested Class Summary

 

Nested classes/interfaces inherited from class org.springframework.transaction.support.AbstractPlatformTransactionManager
AbstractPlatformTransactionManager.SuspendedResourcesHolder

 

Field Summary
static String	DEFAULT_UOW_MANAGER_NAME           Default JNDI location for the WebSphere UOWManager.

 

Fields inherited from class org.springframework.transaction.jta.JtaTransactionManager
DEFAULT_TRANSACTION_SYNCHRONIZATION_REGISTRY_NAME, DEFAULT_USER_TRANSACTION_NAME, FALLBACK_TRANSACTION_MANAGER_NAMES

 

Fields inherited from class org.springframework.transaction.support.AbstractPlatformTransactionManager
logger, SYNCHRONIZATION_ALWAYS, SYNCHRONIZATION_NEVER, SYNCHRONIZATION_ON_ACTUAL_TRANSACTION

 

Constructor Summary
WebSphereUowTransactionManager()           Create a new WebSphereUowTransactionManager.
WebSphereUowTransactionManager(com.ibm.wsspi.uow.UOWManager uowManager)           Create a new WebSphereUowTransactionManager for the given UOWManager.

 

Method Summary
void	afterPropertiesSet()           Initialize the UserTransaction as well as the TransactionManager handle.
Object	execute(TransactionDefinition definition, TransactionCallback callback)           Execute the action specified by the given callback object within a transaction.
protected  com.ibm.wsspi.uow.UOWManager	lookupUowManager(String uowManagerName)           Look up the WebSphere UOWManager in JNDI via the configured name.
void	setUowManager(com.ibm.wsspi.uow.UOWManager uowManager)           Set the WebSphere UOWManager to use as direct reference.
void	setUowManagerName(String uowManagerName)           Set the JNDI name of the WebSphere UOWManager.

 

Methods inherited from class org.springframework.transaction.jta.JtaTransactionManager

applyIsolationLevel, applyTimeout, buildUserTransaction, createTransaction, doBegin, doCommit, doGetJtaTransaction, doGetTransaction, doJtaBegin, doJtaResume, doJtaSuspend, doRegisterAfterCompletionWithJtaTransaction, doResume, doRollback, doSetRollbackOnly, doSuspend, findTransactionManager, findTransactionSynchronizationRegistry, findUserTransaction, getJndiEnvironment, getJndiTemplate, getTransactionManager, getUserTransaction, initTransactionSynchronizationRegistry, initUserTransactionAndTransactionManager, isExistingTransaction, lookupTransactionManager, lookupTransactionSynchronizationRegistry, lookupUserTransaction, registerAfterCompletionWithExistingTransaction, retrieveTransactionManager, retrieveTransactionSynchronizationRegistry, retrieveUserTransaction, setAllowCustomIsolationLevels, setAutodetectTransactionManager, setAutodetectUserTransaction, setCacheUserTransaction, setJndiEnvironment, setJndiTemplate, setTransactionManager, setTransactionManagerName, setTransactionSynchronizationRegistryName, setUserTransaction, setUserTransactionName, shouldCommitOnGlobalRollbackOnly, useSavepointForNestedTransaction

 

Methods inherited from class org.springframework.transaction.support.AbstractPlatformTransactionManager

commit, determineTimeout, doCleanupAfterCompletion, getDefaultTimeout, getTransaction, getTransactionSynchronization, invokeAfterCompletion, isFailEarlyOnGlobalRollbackOnly, isGlobalRollbackOnParticipationFailure, isNestedTransactionAllowed, isRollbackOnCommitFailure, newTransactionStatus, resume, rollback, setDefaultTimeout, setFailEarlyOnGlobalRollbackOnly, setGlobalRollbackOnParticipationFailure, setNestedTransactionAllowed, setRollbackOnCommitFailure, setTransactionSynchronization, setTransactionSynchronizationName, suspend, triggerBeforeCommit, triggerBeforeCompletion

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Methods inherited from interface org.springframework.transaction.PlatformTransactionManager
commit, getTransaction, rollback

 

Field Detail

DEFAULT_UOW_MANAGER_NAME

public static final String DEFAULT_UOW_MANAGER_NAME

Default JNDI location for the WebSphere UOWManager.

See Also:

setUowManagerName(java.lang.String), Constant Field Values

Constructor Detail

WebSphereUowTransactionManager

public WebSphereUowTransactionManager()

Create a new WebSphereUowTransactionManager.

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WebSphereUowTransactionManager

public WebSphereUowTransactionManager(com.ibm.wsspi.uow.UOWManager uowManager)

Create a new WebSphereUowTransactionManager for the given UOWManager.

Parameters:

uowManager - the WebSphere UOWManager to use as direct reference

Method Detail

setUowManager

public void setUowManager(com.ibm.wsspi.uow.UOWManager uowManager)

Set the WebSphere UOWManager to use as direct reference.

Typically just used for test setups; in a J2EE environment, the UOWManager will always be fetched from JNDI.

See Also:

JtaTransactionManager.setUserTransactionName(java.lang.String)

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setUowManagerName

public void setUowManagerName(String uowManagerName)

Set the JNDI name of the WebSphere UOWManager. The default "java:comp/websphere/UOWManager" is used if not set.

See Also:

JtaTransactionManager.DEFAULT_USER_TRANSACTION_NAME, setUowManager(com.ibm.wsspi.uow.UOWManager)

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afterPropertiesSet

public void afterPropertiesSet()
                        throws TransactionSystemException

Description copied from class: JtaTransactionManager

Initialize the UserTransaction as well as the TransactionManager handle.

Specified by:

afterPropertiesSet in interface InitializingBean

Overrides:

afterPropertiesSet in class JtaTransactionManager

Throws:

TransactionSystemException

See Also:

JtaTransactionManager.initUserTransactionAndTransactionManager()

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lookupUowManager

protected com.ibm.wsspi.uow.UOWManager lookupUowManager(String uowManagerName)
                                                 throws TransactionSystemException

Look up the WebSphere UOWManager in JNDI via the configured name. Called by afterPropertiesSet if no direct UOWManager reference was set. Can be overridden in subclasses to provide a different UOWManager object.

Parameters:

uowManagerName - the JNDI name of the UOWManager

Returns:

the UOWManager object

Throws:

TransactionSystemException - if the JNDI lookup failed

See Also:

JtaTransactionManager.setJndiTemplate(org.springframework.jndi.JndiTemplate), setUowManagerName(java.lang.String)

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execute

public Object execute(TransactionDefinition definition,
                      TransactionCallback callback)
               throws TransactionException

Description copied from interface: CallbackPreferringPlatformTransactionManager

Execute the action specified by the given callback object within a transaction.

Allows for returning a result object created within the transaction, that is, a domain object or a collection of domain objects. A RuntimeException thrown by the callback is treated as a fatal exception that enforces a rollback. Such an exception gets propagated to the caller of the template.

Specified by:

execute in interface CallbackPreferringPlatformTransactionManager

Parameters:

definition - the definition for the transaction to wrap the callback in

callback - the callback object that specifies the transactional action

Returns:

a result object returned by the callback, or null if none

Throws:

TransactionException - in case of initialization, rollback, or system errors

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