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

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org.springframework.transaction.interceptor
Class DelegatingTransactionAttribute

java.lang.Object
  org.springframework.transaction.interceptor.DelegatingTransactionAttribute

All Implemented Interfaces:

TransactionAttribute, TransactionDefinition

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public abstract class DelegatingTransactionAttribute
extends Object
implements TransactionAttribute

TransactionAttribute implementation that delegates all calls to a given target TransactionAttribute. Abstract because it is meant to be subclassed, with subclasses overriding specific methods that should not simply delegate to the target.

Since:

1.2

Author:

Juergen Hoeller

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Field Summary

 

Fields inherited from interface org.springframework.transaction.TransactionDefinition
ISOLATION_DEFAULT, ISOLATION_READ_COMMITTED, ISOLATION_READ_UNCOMMITTED, ISOLATION_REPEATABLE_READ, ISOLATION_SERIALIZABLE, PROPAGATION_MANDATORY, PROPAGATION_NESTED, PROPAGATION_NEVER, PROPAGATION_NOT_SUPPORTED, PROPAGATION_REQUIRED, PROPAGATION_REQUIRES_NEW, PROPAGATION_SUPPORTS, TIMEOUT_DEFAULT

 

Constructor Summary
DelegatingTransactionAttribute(TransactionAttribute targetAttribute)           Create a DelegatingTransactionAttribute for the given target attribute.

 

Method Summary
boolean	equals(Object obj)
int	getIsolationLevel()           Return the isolation level.
String	getName()           Return the name of this transaction.
int	getPropagationBehavior()           Return the propagation behavior.
int	getTimeout()           Return the transaction timeout.
int	hashCode()
boolean	isReadOnly()           Return whether to optimize as a read-only transaction.
boolean	rollbackOn(Throwable ex)           Should we roll back on the given exception?
String	toString()

 

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

 

Constructor Detail

DelegatingTransactionAttribute

public DelegatingTransactionAttribute(TransactionAttribute targetAttribute)

Create a DelegatingTransactionAttribute for the given target attribute.

Parameters:

targetAttribute - the target TransactionAttribute to delegate to

Method Detail

getPropagationBehavior

public int getPropagationBehavior()

Description copied from interface: TransactionDefinition

Return the propagation behavior.

Must return one of the PROPAGATION_XXX constants defined on this interface.

Specified by:

getPropagationBehavior in interface TransactionDefinition

Returns:

the propagation behavior

See Also:

TransactionDefinition.PROPAGATION_REQUIRED, TransactionSynchronizationManager.isActualTransactionActive()

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getIsolationLevel

public int getIsolationLevel()

Description copied from interface: TransactionDefinition

Return the isolation level.

Must return one of the ISOLATION_XXX constants defined on this interface.

Only makes sense in combination with TransactionDefinition.PROPAGATION_REQUIRED or TransactionDefinition.PROPAGATION_REQUIRES_NEW.

Note that a transaction manager that does not support custom isolation levels will throw an exception when given any other level than TransactionDefinition.ISOLATION_DEFAULT.

Specified by:

getIsolationLevel in interface TransactionDefinition

Returns:

the isolation level

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getTimeout

public int getTimeout()

Description copied from interface: TransactionDefinition

Return the transaction timeout.

Must return a number of seconds, or TransactionDefinition.TIMEOUT_DEFAULT.

Only makes sense in combination with TransactionDefinition.PROPAGATION_REQUIRED or TransactionDefinition.PROPAGATION_REQUIRES_NEW.

Note that a transaction manager that does not support timeouts will throw an exception when given any other timeout than TransactionDefinition.TIMEOUT_DEFAULT.

Specified by:

getTimeout in interface TransactionDefinition

Returns:

the transaction timeout

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isReadOnly

public boolean isReadOnly()

Description copied from interface: TransactionDefinition

Return whether to optimize as a read-only transaction.

The read-only flag applies to any transaction context, whether backed by an actual resource transaction (TransactionDefinition.PROPAGATION_REQUIRED/TransactionDefinition.PROPAGATION_REQUIRES_NEW) or operating non-transactionally at the resource level (TransactionDefinition.PROPAGATION_SUPPORTS). In the latter case, the flag will only apply to managed resources within the application, such as a Hibernate Session.

This just serves as a hint for the actual transaction subsystem; it will not necessarily cause failure of write access attempts. A transaction manager that cannot interpret the read-only hint will not throw an exception when asked for a read-only transaction.

Specified by:

isReadOnly in interface TransactionDefinition

Returns:

true if the transaction is to be optimized as read-only

See Also:

TransactionSynchronization.beforeCommit(boolean), TransactionSynchronizationManager.isCurrentTransactionReadOnly()

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getName

public String getName()

Description copied from interface: TransactionDefinition

Return the name of this transaction. Can be null.

This will be used as the transaction name to be shown in a transaction monitor, if applicable (for example, WebLogic's).

In case of Spring's declarative transactions, the exposed name must (and will) be the fully-qualified class name + "." + method name (by default).

Specified by:

getName in interface TransactionDefinition

Returns:

the name of this transaction

See Also:

TransactionAspectSupport, TransactionSynchronizationManager.getCurrentTransactionName()

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rollbackOn

public boolean rollbackOn(Throwable ex)

Description copied from interface: TransactionAttribute

Should we roll back on the given exception?

Specified by:

rollbackOn in interface TransactionAttribute

Parameters:

ex - the exception to evaluate

Returns:

whether to perform a rollback or not

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equals

public boolean equals(Object obj)

Overrides:

equals in class Object

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hashCode

public int hashCode()

Overrides:

hashCode in class Object

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toString

public String toString()

Overrides:

toString in class Object

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