CODEWITHSUNDEEP
hibernatetapestry
Eleeist
Eleeist

Reputation: 7041

Tapestry overriding HibernateSessionManager error

I am trying to override org.apache.tapestry5.hibernate.HibernateSessionManager. To do this I added this to my AppModule:

public static void contributeServiceOverride(
        MappedConfiguration<Class<?>, Object> configuration)
{
    configuration.addInstance(HibernateSessionManager.class,
            HibernateSessionManagerOverride.class);
}

The content of HibernateSessionManagerOverride (for the time being) is the same as the default Tapestry implementation org.apache.tapestry5.internal.hibernate.HibernateSessionManagerImpl.

When I run my application I get this error:

java.lang.RuntimeException: 
Exception constructing service 'ServletApplicationInitializer': 
Unable to instantiate class org.apache.tapestry5.services.TapestryModule as a module: 
Exception constructing service 'ServiceOverride': 
Error invoking service contribution method com.company.services.AppModule.contributeServiceOverride(MappedConfiguration): 
Exception constructing service 'ServiceOverride': 
Construction of service 'ServiceOverride' has failed due to recursion:
the service depends on itself in some way. Please check org.apache.tapestry5.ioc.internal.services.ServiceOverrideImpl(Map) (at ServiceOverrideImpl.java:31) via org.apache.tapestry5.ioc.services.TapestryIOCModule.bind(ServiceBinder) (at TapestryIOCModule.java:49) for references to another service that is itself dependent on service 'ServiceOverride'.

Upvotes: 0

Views: 523

Answers (2)

ebt
ebt

Reputation: 1358

I dont want to devalue Lance's answer but using this method I found that ThreadCleanupListener was not added or called which means that sessions were not being rolled back at the end of the threads lifecycle. I modified the above example to add the override as a threadcleanup listener.

public static HibernateSessionManager decorateHibernateSessionManager(
        HibernateSessionManager defaultManager,
        @Autobuild HibernateSessionManagerOverride overrideManager,
        PerthreadManager perthreadManager)
{
    perthreadManager.addThreadCleanupListener(overrideManager);
    return overrideManager;
}

this is critical so that sessions are rolled back and closed after use.

Upvotes: 0

lance-java
lance-java

Reputation: 27994

Looking at hibernateModule.java, I can see the following:

@Contribute(ServiceOverride.class)
public static void provideInjectableSessionObject(
        MappedConfiguration<Class, Object> configuration, 
        @HibernateCore Session session)
{
    configuration.add(Session.class, session);
}

Perhaps this is causing the circular dependency?

You might need to use a decorator instead of a ServiceOverride

eg:

public static HibernateSessionManager decorateHibernateSessionManager(
        HibernateSessionManager defaultManager, 
        @Autobuild HibernateSessionManagerOverride overrideManager)
{
    return overrideManager;
}

Upvotes: 1

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