Package org.apache.isis.persistence.jdo.spring.support

Class OpenPersistenceManagerInViewInterceptor

java.lang.Object

org.apache.isis.persistence.jdo.spring.support.OpenPersistenceManagerInViewInterceptor

All Implemented Interfaces:

org.springframework.web.context.request.WebRequestInterceptor

public class OpenPersistenceManagerInViewInterceptor
extends Object
implements org.springframework.web.context.request.WebRequestInterceptor

Spring web request interceptor that binds a JDO PersistenceManager to the thread for the entire processing of the request. Intended for the "Open PersistenceManager in View" pattern, i.e. to allow for lazy loading in web views despite the original transactions already being completed.

This interceptor makes JDO PersistenceManagers available via the current thread, which will be autodetected by transaction managers. It is suitable for service layer transactions via JdoTransactionManager or JtaTransactionManager as well as for non-transactional read-only execution.

In contrast to OpenPersistenceManagerInViewFilter, this interceptor is set up in a Spring application context and can thus take advantage of bean wiring.

See Also:

OpenPersistenceManagerInViewFilter, JdoTransactionManager, PersistenceManagerFactoryUtils.getPersistenceManager(javax.jdo.PersistenceManagerFactory, boolean), TransactionSynchronizationManager

Field Summary

Fields

Modifier and Type	Field	Description
protected org.apache.commons.logging.Log	logger
static String	PARTICIPATE_SUFFIX	Suffix that gets appended to the PersistenceManagerFactory toString representation for the "participate in existing persistence manager handling" request attribute.

Constructor Summary

Constructors

Constructor	Description
OpenPersistenceManagerInViewInterceptor()

Method Summary

Modifier and Type	Method	Description
void	afterCompletion(org.springframework.web.context.request.WebRequest request, Exception ex)
protected String	getParticipateAttributeName()	Return the name of the request attribute that identifies that a request is already filtered.
javax.jdo.PersistenceManagerFactory	getPersistenceManagerFactory()	Return the JDO PersistenceManagerFactory that should be used to create PersistenceManagers.
void	postHandle(org.springframework.web.context.request.WebRequest request, org.springframework.ui.ModelMap model)
void	preHandle(org.springframework.web.context.request.WebRequest request)
void	setPersistenceManagerFactory(javax.jdo.PersistenceManagerFactory pmf)	Set the JDO PersistenceManagerFactory that should be used to create PersistenceManagers.

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 String PARTICIPATE_SUFFIX

Suffix that gets appended to the PersistenceManagerFactory toString representation for the "participate in existing persistence manager handling" request attribute.

See Also:

getParticipateAttributeName(), Constant Field Values

logger

protected final org.apache.commons.logging.Log logger

Constructor Detail

OpenPersistenceManagerInViewInterceptor

public OpenPersistenceManagerInViewInterceptor()

Method Detail

setPersistenceManagerFactory

public void setPersistenceManagerFactory(javax.jdo.PersistenceManagerFactory pmf)

Set the JDO PersistenceManagerFactory that should be used to create PersistenceManagers.

getPersistenceManagerFactory

public javax.jdo.PersistenceManagerFactory getPersistenceManagerFactory()

Return the JDO PersistenceManagerFactory that should be used to create PersistenceManagers.

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,
                            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 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 PersistenceManagerFactory instance and appends ".FILTERED".

See Also:

PARTICIPATE_SUFFIX