org.springframework.orm.toplink
Class TopLinkInterceptor
java.lang.Object
   org.springframework.orm.toplink.TopLinkAccessor
org.springframework.orm.toplink.TopLinkAccessor
       org.springframework.orm.toplink.TopLinkInterceptor
org.springframework.orm.toplink.TopLinkInterceptor
- All Implemented Interfaces: 
- Advice, Interceptor, MethodInterceptor, InitializingBean
- public class TopLinkInterceptor 
- extends TopLinkAccessor- implements MethodInterceptor
This interceptor binds a new TopLink Session to the thread before a method
 call, closing and removing it afterwards in case of any method outcome.
 If there already is a pre-bound Session (e.g. from TopLinkTransactionManager,
 or from a surrounding TopLink-intercepted method), the interceptor simply
 takes part in it.
 
Application code must retrieve a TopLink Session via the
 SessionFactoryUtils.getSession method or - preferably -
 TopLink's own Session.getActiveSession() method, to be able to
 detect a thread-bound Session. Typically, the code will look like as follows:
 
 public void doSomeDataAccessAction() {
   Session session = this.serverSession.getActiveSession();
   ...
 }
 Note that this interceptor automatically translates TopLinkExceptions,
 via delegating to the SessionFactoryUtils.convertTopLikAccessException
 method that converts them to exceptions that are compatible with the
 org.springframework.dao exception hierarchy (like TopLinkTemplate does).
 This can be turned off if the raw exceptions are preferred.
 This class can be considered a declarative alternative to TopLinkTemplate's
 callback approach. The advantages are:
 
 - no anonymous classes necessary for callback implementations;
 
- the possibility to throw any application exceptions from within data access code.
 
The drawback is the dependency on interceptor configuration. However, note
 that this interceptor is usually not necessary in scenarios where the
 data access code always executes within transactions. A transaction will always
 have a thread-bound Session in the first place, so adding this interceptor to the
 configuration just adds value when potentially executing outside of transactions
 and/or when relying on exception translation.
- Since:
- 1.2
- Author:
- Juergen Hoeller
 
 
 
 
 
| Methods inherited from class java.lang.Object | 
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
 
TopLinkInterceptor
public TopLinkInterceptor()
setExceptionConversionEnabled
public void setExceptionConversionEnabled(boolean exceptionConversionEnabled)
- Set whether to convert any TopLinkException raised to a Spring DataAccessException,
 compatible with the org.springframework.daoexception hierarchy.Default is "true". Turn this flag off to let the caller receive raw exceptions
 as-is, without any wrapping.
 
 
- 
 
- 
- See Also:
- DataAccessException
 
invoke
public Object invoke(MethodInvocation methodInvocation)
              throws Throwable
- 
- Specified by:
- invokein interface- MethodInterceptor
 
- 
- Throws:
- Throwable
 
Copyright © 2002-2008 The Spring Framework.