public class OpenSessionInViewInterceptor extends Object implements org.springframework.web.context.request.AsyncWebRequestInterceptor
Session to the
thread for the entire processing of the request.
This class is a concrete expression of the "Open Session in View" pattern, which is a pattern that allows for the lazy loading of associations in web views despite the original transactions already being completed.
This interceptor makes Hibernate Sessions available via the current thread,
which will be autodetected by transaction managers. It is suitable for service layer
transactions via HibernateTransactionManager
as well as for non-transactional execution (if configured appropriately).
In contrast to OpenSessionInViewFilter, this interceptor is configured
in a Spring application context and can thus take advantage of bean wiring.
WARNING: Applying this interceptor to existing logic can cause issues
that have not appeared before, through the use of a single Hibernate
Session for the processing of an entire request. In particular, the
reassociation of persistent objects with a Hibernate Session has to
occur at the very beginning of request processing, to avoid clashes with already
loaded instances of the same objects.
OpenSessionInViewFilter,
OpenSessionInterceptor,
HibernateTransactionManager,
TransactionSynchronizationManager,
SessionFactory.getCurrentSession()| Modifier and Type | Field and Description |
|---|---|
protected Log |
logger |
static String |
PARTICIPATE_SUFFIX
Suffix that gets appended to the
SessionFactory
toString() representation for the "participate in existing
session handling" request attribute. |
| Constructor and Description |
|---|
OpenSessionInViewInterceptor() |
| Modifier and Type | Method and Description |
|---|---|
void |
afterCompletion(org.springframework.web.context.request.WebRequest request,
Exception ex)
Unbind the Hibernate
Session from the thread and close it). |
void |
afterConcurrentHandlingStarted(org.springframework.web.context.request.WebRequest request) |
protected String |
getParticipateAttributeName()
Return the name of the request attribute that identifies that a request is
already intercepted.
|
SessionFactory |
getSessionFactory()
Return the Hibernate SessionFactory that should be used to create Hibernate Sessions.
|
protected Session |
openSession()
Open a Session for the SessionFactory that this interceptor uses.
|
void |
postHandle(org.springframework.web.context.request.WebRequest request,
org.springframework.ui.ModelMap model) |
void |
preHandle(org.springframework.web.context.request.WebRequest request)
Open a new Hibernate
Session according and bind it to the thread via the
TransactionSynchronizationManager. |
void |
setSessionFactory(SessionFactory sessionFactory)
Set the Hibernate SessionFactory that should be used to create Hibernate Sessions.
|
public static final String PARTICIPATE_SUFFIX
SessionFactory
toString() representation for the "participate in existing
session handling" request attribute.protected final Log logger
public void setSessionFactory(SessionFactory sessionFactory)
public SessionFactory getSessionFactory()
public void preHandle(org.springframework.web.context.request.WebRequest request)
throws org.springframework.dao.DataAccessException
Session according and bind it to the thread via the
TransactionSynchronizationManager.preHandle in interface org.springframework.web.context.request.WebRequestInterceptororg.springframework.dao.DataAccessExceptionpublic void postHandle(org.springframework.web.context.request.WebRequest request,
org.springframework.ui.ModelMap model)
postHandle in interface org.springframework.web.context.request.WebRequestInterceptorpublic void afterCompletion(org.springframework.web.context.request.WebRequest request,
Exception ex)
throws org.springframework.dao.DataAccessException
Session from the thread and close it).afterCompletion in interface org.springframework.web.context.request.WebRequestInterceptororg.springframework.dao.DataAccessExceptionTransactionSynchronizationManagerpublic void afterConcurrentHandlingStarted(org.springframework.web.context.request.WebRequest request)
afterConcurrentHandlingStarted in interface org.springframework.web.context.request.AsyncWebRequestInterceptorprotected Session openSession() throws org.springframework.dao.DataAccessResourceFailureException
The default implementation delegates to the SessionFactory.openSession()
method and sets the Session's flush mode to "MANUAL".
org.springframework.dao.DataAccessResourceFailureException - if the Session could not be createdFlushMode.MANUALprotected String getParticipateAttributeName()
The default implementation takes the toString() representation
of the SessionFactory instance and appends PARTICIPATE_SUFFIX.