Java Doc for HibernateInterceptor.java in  » J2EE » spring-framework-2.5 » org » springframework » orm » hibernate3 » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » spring framework 2.5 » org.springframework.orm.hibernate3 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.springframework.orm.hibernate3.HibernateAccessor
      org.springframework.orm.hibernate3.HibernateInterceptor

HibernateInterceptor
public class HibernateInterceptor extends HibernateAccessor implements MethodInterceptor(Code)
This interceptor binds a new Hibernate 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 HibernateTransactionManager, or from a surrounding Hibernate-intercepted method), the interceptor simply participates in it.

Application code must retrieve a Hibernate Session via the SessionFactoryUtils.getSession method or - preferably - Hibernate's own SessionFactory.getCurrentSession() method, to be able to detect a thread-bound Session. Typically, the code will look like as follows:

 public void doSomeDataAccessAction() {
 Session session = this.sessionFactory.getCurrentSession();
 ...
 // No need to close the Session or translate exceptions!
 }
Note that this interceptor automatically translates HibernateExceptions, via delegating to the SessionFactoryUtils.convertHibernateAccessException method that converts them to exceptions that are compatible with the org.springframework.dao exception hierarchy (like HibernateTemplate does). This can be turned off if the raw exceptions are preferred.

This class can be considered a declarative alternative to HibernateTemplate'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 fine-tuning Session settings like the flush mode - or when relying on exception translation.
author:
   Juergen Hoeller
since:
   1.2
See Also:   org.hibernate.SessionFactory.getCurrentSession
See Also:   HibernateTransactionManager
See Also:   HibernateTemplate





Method Summary
protected  SessiongetSession()
     Return a Session for use by this interceptor.
public  Objectinvoke(MethodInvocation methodInvocation)
    
public  voidsetExceptionConversionEnabled(boolean exceptionConversionEnabled)
     Set whether to convert any HibernateException raised to a Spring DataAccessException, compatible with the org.springframework.dao exception hierarchy.

Default is "true".




Method Detail
getSession
protected Session getSession()(Code)
Return a Session for use by this interceptor.
See Also:   SessionFactoryUtils.getSession



invoke
public Object invoke(MethodInvocation methodInvocation) throws Throwable(Code)



setExceptionConversionEnabled
public void setExceptionConversionEnabled(boolean exceptionConversionEnabled)(Code)
Set whether to convert any HibernateException raised to a Spring DataAccessException, compatible with the org.springframework.dao exception hierarchy.

Default is "true". Turn this flag off to let the caller receive raw exceptions as-is, without any wrapping.
See Also:   org.springframework.dao.DataAccessException




Fields inherited from org.springframework.orm.hibernate3.HibernateAccessor
final public static int FLUSH_ALWAYS(Code)(Java Doc)
final public static int FLUSH_AUTO(Code)(Java Doc)
final public static int FLUSH_COMMIT(Code)(Java Doc)
final public static int FLUSH_EAGER(Code)(Java Doc)
final public static int FLUSH_NEVER(Code)(Java Doc)
final protected Log logger(Code)(Java Doc)

Methods inherited from org.springframework.orm.hibernate3.HibernateAccessor
public void afterPropertiesSet()(Code)(Java Doc)
protected FlushMode applyFlushMode(Session session, boolean existingTransaction)(Code)(Java Doc)
public DataAccessException convertHibernateAccessException(HibernateException ex)(Code)(Java Doc)
protected DataAccessException convertJdbcAccessException(JDBCException ex, SQLExceptionTranslator translator)(Code)(Java Doc)
protected DataAccessException convertJdbcAccessException(SQLException ex)(Code)(Java Doc)
protected void disableFilters(Session session)(Code)(Java Doc)
protected void enableFilters(Session session)(Code)(Java Doc)
protected void flushIfNecessary(Session session, boolean existingTransaction) throws HibernateException(Code)(Java Doc)
protected synchronized SQLExceptionTranslator getDefaultJdbcExceptionTranslator()(Code)(Java Doc)
public Interceptor getEntityInterceptor() throws IllegalStateException, BeansException(Code)(Java Doc)
public String[] getFilterNames()(Code)(Java Doc)
public int getFlushMode()(Code)(Java Doc)
public SQLExceptionTranslator getJdbcExceptionTranslator()(Code)(Java Doc)
public SessionFactory getSessionFactory()(Code)(Java Doc)
public void setBeanFactory(BeanFactory beanFactory)(Code)(Java Doc)
public void setEntityInterceptor(Interceptor entityInterceptor)(Code)(Java Doc)
public void setEntityInterceptorBeanName(String entityInterceptorBeanName)(Code)(Java Doc)
public void setFilterName(String filter)(Code)(Java Doc)
public void setFilterNames(String[] filterNames)(Code)(Java Doc)
public void setFlushMode(int flushMode)(Code)(Java Doc)
public void setFlushModeName(String constantName)(Code)(Java Doc)
public void setJdbcExceptionTranslator(SQLExceptionTranslator jdbcExceptionTranslator)(Code)(Java Doc)
public void setSessionFactory(SessionFactory sessionFactory)(Code)(Java Doc)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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