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java.lang.Object org.springframework.orm.jpa.EntityManagerFactoryAccessor org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor
public class OpenEntityManagerInViewInterceptor
Spring web HandlerInterceptor that binds a JPA EntityManager to the thread for the entire processing of the request. Intended for the "Open EntityManager in View" pattern, i.e. to allow for lazy loading in web views despite the original transactions already being completed.
This filter works similar to the AOP JpaInterceptor: It just makes JPA EntityManagers available via the thread. It is suitable for non-transactional execution but also for middle tier transactions via JpaTransactionManager or JtaTransactionManager. In the latter case, EntityManagers pre-bound by this filter will automatically be used for the transactions.
In contrast to OpenEntityManagerInViewFilter, this interceptor is set up in a Spring application context and can thus take advantage of bean wiring. It derives from JpaAccessor to inherit common JPA configuration properties.
OpenEntityManagerInViewFilter
,
JpaInterceptor
,
JpaTransactionManager
,
JpaTemplate.execute(org.springframework.orm.jpa.JpaCallback)
,
SharedEntityManagerCreator
,
TransactionSynchronizationManager
Field Summary | |
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static String |
PARTICIPATE_SUFFIX
Suffix that gets appended to the EntityManagerFactory toString representation for the "participate in existing entity manager handling" request attribute. |
Fields inherited from class org.springframework.orm.jpa.EntityManagerFactoryAccessor |
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logger |
Constructor Summary | |
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OpenEntityManagerInViewInterceptor()
|
Method Summary | |
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void |
afterCompletion(WebRequest request,
Exception ex)
Callback after completion of request processing, that is, after rendering the view. |
protected String |
getParticipateAttributeName()
Return the name of the request attribute that identifies that a request is already filtered. |
void |
postHandle(WebRequest request,
ModelMap model)
Intercept the execution of a request handler after its successful invocation, right before view rendering (if any). |
void |
preHandle(WebRequest request)
Intercept the execution of a request handler before its invocation. |
Methods inherited from class org.springframework.orm.jpa.EntityManagerFactoryAccessor |
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createEntityManager, getEntityManagerFactory, getJpaPropertyMap, getTransactionalEntityManager, setEntityManagerFactory, setJpaProperties, setJpaPropertyMap |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final String PARTICIPATE_SUFFIX
getParticipateAttributeName()
,
Constant Field ValuesConstructor Detail |
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public OpenEntityManagerInViewInterceptor()
Method Detail |
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public void preHandle(WebRequest request) throws DataAccessException
WebRequestInterceptor
Allows for preparing context resources (such as a Hibernate Session) and expose them as request attributes or as thread-local objects.
preHandle
in interface WebRequestInterceptor
request
- the current web request
DataAccessException
public void postHandle(WebRequest request, ModelMap model)
WebRequestInterceptor
Allows for modifying context resources after successful handler execution (for example, flushing a Hibernate Session).
postHandle
in interface WebRequestInterceptor
request
- the current web requestmodel
- the map of model objects that will be exposed to the view
(may be null
). Can be used to analyze the exposed model
and/or to add further model attributes, if desired.public void afterCompletion(WebRequest request, Exception ex) throws DataAccessException
WebRequestInterceptor
Note: Will only be called if this interceptor's preHandle
method has successfully completed!
afterCompletion
in interface WebRequestInterceptor
request
- the current web requestex
- exception thrown on handler execution, if any
DataAccessException
protected String getParticipateAttributeName()
PARTICIPATE_SUFFIX
|
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