Conversations with Hibernate This (Web hosting isp) sounds more complex than
Conversations with Hibernate This sounds more complex than it is in code. Listing 11.5 is a pseudoimplementation of such an interceptor: Listing 11.5 An interceptor implements the session-per-conversation strategy public class ConversationInterceptor { public Object invoke(Method method) { // Which Session to use? Session currentSession = null; if (disconnectedSession == null) { // Start of a new conversation currentSession = sessionFactory.openSession(); currentSession.setFlushMode(FlushMode.MANUAL); } else { // In the middle of a conversation currentSession = disconnectedSession; } // Bind before processing event ManagedSessionContext.bind(currentSession); // Begin a database transaction, reconnects Session currentSession.beginTransaction(); // Process the event by invoking the wrapped execute() Object returnValue = method.invoke(); // Unbind after processing the event currentSession = ManagedSessionContext.unbind(sessionFactory); // Decide if this was the last event in the conversation if ( returnValue.containsEndOfConversationToken() ) { // The event was the last event: flush, commit, close currentSession.flush(); currentSession.getTransaction().commit(); currentSession.close(); disconnectedSession = null; // Clean up } else { // Event was not the last event, continue conversation currentSession.getTransaction().commit(); // Disconnects disconnectedSession = currentSession; } return returnValue; } }
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