spring-orm

org.springframework.orm.jpa.support
Class OpenEntityManagerInViewInterceptor

java.lang.Object
  extended by org.springframework.orm.jpa.EntityManagerFactoryAccessor
      extended by org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor
All Implemented Interfaces:
org.springframework.beans.factory.Aware, org.springframework.beans.factory.BeanFactoryAware, org.springframework.web.context.request.WebRequestInterceptor

public class OpenEntityManagerInViewInterceptor
extends EntityManagerFactoryAccessor
implements org.springframework.web.context.request.WebRequestInterceptor

Spring web request interceptor 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 interceptor makes JPA EntityManagers available via the current thread, which will be autodetected by transaction managers. It is suitable for service layer transactions via JpaTransactionManager or JtaTransactionManager as well as for non-transactional read-only execution.

In contrast to OpenEntityManagerInViewFilter, this interceptor is set up in a Spring application context and can thus take advantage of bean wiring. It inherits common JPA configuration properties from JpaAccessor, to be configured in a bean definition.

Since:
2.0
Author:
Juergen Hoeller
See Also:
OpenEntityManagerInViewFilter, JpaInterceptor, JpaTransactionManager, JpaTemplate.execute(org.springframework.orm.jpa.JpaCallback), SharedEntityManagerCreator, TransactionSynchronizationManager

Field Summary
static java.lang.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
logger
 
Constructor Summary
OpenEntityManagerInViewInterceptor()
           
 
Method Summary
 void afterCompletion(org.springframework.web.context.request.WebRequest request, java.lang.Exception ex)
           
protected  java.lang.String getParticipateAttributeName()
          Return the name of the request attribute that identifies that a request is already filtered.
 void postHandle(org.springframework.web.context.request.WebRequest request, org.springframework.ui.ModelMap model)
           
 void preHandle(org.springframework.web.context.request.WebRequest request)
           
 
Methods inherited from class org.springframework.orm.jpa.EntityManagerFactoryAccessor
createEntityManager, getEntityManagerFactory, getJpaPropertyMap, getPersistenceUnitName, getTransactionalEntityManager, setBeanFactory, setEntityManagerFactory, setJpaProperties, setJpaPropertyMap, setPersistenceUnitName
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

PARTICIPATE_SUFFIX

public static final java.lang.String PARTICIPATE_SUFFIX
Suffix that gets appended to the EntityManagerFactory toString representation for the "participate in existing entity manager handling" request attribute.

See Also:
getParticipateAttributeName(), Constant Field Values
Constructor Detail

OpenEntityManagerInViewInterceptor

public OpenEntityManagerInViewInterceptor()
Method Detail

preHandle

public void preHandle(org.springframework.web.context.request.WebRequest request)
               throws org.springframework.dao.DataAccessException
Specified by:
preHandle in interface org.springframework.web.context.request.WebRequestInterceptor
Throws:
org.springframework.dao.DataAccessException

postHandle

public void postHandle(org.springframework.web.context.request.WebRequest request,
                       org.springframework.ui.ModelMap model)
Specified by:
postHandle in interface org.springframework.web.context.request.WebRequestInterceptor

afterCompletion

public void afterCompletion(org.springframework.web.context.request.WebRequest request,
                            java.lang.Exception ex)
                     throws org.springframework.dao.DataAccessException
Specified by:
afterCompletion in interface org.springframework.web.context.request.WebRequestInterceptor
Throws:
org.springframework.dao.DataAccessException

getParticipateAttributeName

protected java.lang.String getParticipateAttributeName()
Return the name of the request attribute that identifies that a request is already filtered. Default implementation takes the toString representation of the EntityManagerFactory instance and appends ".FILTERED".

See Also:
PARTICIPATE_SUFFIX

spring-orm