org.springframework.orm.hibernate3

## Class HibernateInterceptor

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

- All Implemented Interfaces:
    Advice, Interceptor, MethodInterceptor, Aware, BeanFactoryAware, InitializingBean

      public class HibernateInterceptor
      extends HibernateAccessor
      implements MethodInterceptor

  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.

  Since:
    1.2
  Author:
    Juergen Hoeller
  See Also:
    `SessionFactory.getCurrentSession()`, `HibernateTransactionManager`, `HibernateTemplate`

- - ### Field Summary

    - ### Fields inherited from class org.springframework.orm.hibernate3.HibernateAccessor

      `FLUSH_ALWAYS, FLUSH_AUTO, FLUSH_COMMIT, FLUSH_EAGER, FLUSH_NEVER, logger`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `HibernateInterceptor()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected Session` | `getSession()` Return a Session for use by this interceptor.
    `Object` | `invoke(MethodInvocation methodInvocation)`
    `void` | `setExceptionConversionEnabled(boolean exceptionConversionEnabled)` Set whether to convert any HibernateException raised to a Spring DataAccessException, compatible with the `org.springframework.dao` exception hierarchy.

    - ### Methods inherited from class org.springframework.orm.hibernate3.HibernateAccessor

      `afterPropertiesSet, applyFlushMode, convertHibernateAccessException, convertJdbcAccessException, convertJdbcAccessException, disableFilters, enableFilters, flushIfNecessary, getDefaultJdbcExceptionTranslator, getEntityInterceptor, getFilterNames, getFlushMode, getJdbcExceptionTranslator, getSessionFactory, setBeanFactory, setEntityInterceptor, setEntityInterceptorBeanName, setFilterName, setFilterNames, setFlushMode, setFlushModeName, setJdbcExceptionTranslator, setSessionFactory`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### HibernateInterceptor

          public HibernateInterceptor()

  - ### Method Detail

    - #### setExceptionConversionEnabled

          public void setExceptionConversionEnabled(boolean exceptionConversionEnabled)

      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:
        `DataAccessException`

    - #### invoke

          public Object invoke(MethodInvocation methodInvocation)
                        throws Throwable

      Specified by:
        `invoke` in interface `MethodInterceptor`
      Throws:
        `Throwable`

    - #### getSession

          protected Session getSession()

      Return a Session for use by this interceptor.
      See Also:
        `SessionFactoryUtils.getSession(org.hibernate.SessionFactory, boolean)`