[jboss-user] [JBoss AOP] - Re: Catching LazyInitialization exception within an Intercep

2007-11-30 Thread jtonic 
anonymous wrote : However in the general case where I have no knowledge of my 
object's getters/setters methods name, it is getting a bit more complicated.

You are very right. I'm working also for a LIE solution, but I use some 
hibernate stuff. I have also the same problem that U've mentioned. IMHO 
reflection is the solution.

The following are the hibernate methods that help me doing  the LIE interceptor:

Hibernate.isInitialized(object);
Hibernate.initialize(object);
session.lock(object, LockType);

Regards, jtonic

mlouna wrote : You're absolutely right. 
  | 
  | I can cast the following to a set of Objects
  | 
  | SetObject mySet = 
(SetObject)methodInvocation.getCalledMethod().invoke(methodInvocation.getTargetObject(),
 methodInvocation.getArguments());
  |   | 
  | and then loop through it with
  | 
  | Iterator iter = mySet.iterator();
  | 
  | In the particular cases where I know my object type I can call
  | parent.getChildren().getChildName() and indeed catch the thrown Lazy Init 
Exception
  | 
  | However in the general case where I have no knowledge of my object's 
getters/setters methods name, it is getting a bit more complicated.
  | 
  | Will have to think of method refelction solution. 
  | 

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[jboss-user] [JBoss AOP] - Re: Catching LazyInitialization exception within an Intercep

2007-11-30 Thread mlouna 
You're absolutely right. 

I can cast the following to a set of Objects

SetObject mySet = 
(SetObject)methodInvocation.getCalledMethod().invoke(methodInvocation.getTargetObject(),
 methodInvocation.getArguments());
  | 
and then loop through it with

Iterator iter = mySet.iterator();

In the particular cases where I know my object type I can call
parent.getChildren().getChildName() and indeed catch the thrown Lazy Init 
Exception

However in the general case where I have no knowledge of my object's 
getters/setters methods name, it is getting a bit more complicated.

Will have to think of method refelction solution. 


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[jboss-user] [JBoss AOP] - Re: Catching LazyInitialization exception within an Intercep

2007-11-28 Thread mlouna 
Here's the full code:

public Object invoke(Invocation invocation) throws Throwable { 

InitialContext initCtx = new InitialContext(); 
EntityManagerFactory emf = 
(EntityManagerFactory)initCtx.lookup(java:/EntManager1Factory); 
EntityManager em = emf.createEntityManager(); 

MethodCalledByMethodInvocation methodInvocation = 
(MethodCalledByMethodInvocation)invocation; 

try { 

methodInvocation.getCalledMethod().invoke(methodInvocation.getTargetObject(), 
methodInvocation.getArguments()); 
} catch (LazyInitializationException ex) { 
Object tmpEntity = 
em.merge(methodInvocation.getTargetObject()); 

methodInvocation.setTargetObject((methodInvocation.getTargetObject().getClass().cast(tmpEntity)))
 
} 

return methodInvocation.invokeNext(); 

}


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[jboss-user] [JBoss AOP] - Re: Catching LazyInitialization exception within an Intercep

2007-11-28 Thread jtonic 
IMO getXXX() invocation does't throw LIE on lazy collection. It return an 
unitialized PersistenceCollection. If you trie to invoke a collection method on 
it get an LIE.

Ex.:

Collection children = parent.getChildren(); // doesn't throw LIE
col.iterator(); //throws LIE 

Regards, jtonic. 

mlouna wrote : Here's the full code:
  | 
  | public Object invoke(Invocation invocation) throws Throwable { 
  | 
  | InitialContext initCtx = new InitialContext(); 
  | EntityManagerFactory emf = 
(EntityManagerFactory)initCtx.lookup(java:/EntManager1Factory); 
  | EntityManager em = emf.createEntityManager(); 
  | 
  | MethodCalledByMethodInvocation methodInvocation = 
(MethodCalledByMethodInvocation)invocation; 
  | 
  | try { 
  | 
methodInvocation.getCalledMethod().invoke(methodInvocation.getTargetObject(), 
methodInvocation.getArguments()); 
  | } catch (LazyInitializationException ex) { 
  | Object tmpEntity = 
em.merge(methodInvocation.getTargetObject()); 
  | 
methodInvocation.setTargetObject((methodInvocation.getTargetObject().getClass().cast(tmpEntity)))
 
  | } 
  | 
  | return methodInvocation.invokeNext(); 
  | 
  | }
  | 

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