how can i call a thread in seam that use entityManager of seam

[assem]

Hi All,
i used :
EntityManager entityManager = (EntityManager) Component.getInstance("entityManager"); in the run() of the thread.
the problem is that the thread could not see the entitymanager from the contexte.
so from a seam Component, how can i call a thread that use entityManager of seam ;
thank You all,
Assem

[lvdberg]

Hi,

Why aren't you using a Asynchrous method in a Seam component, that's also running in a separate Thread and you get entityManager access for free (simply @In) ?

Leo

[assem]

Thanks Leo,
i tested the Asynchrous method, and i dont get multithreading

public method1()
...
for (Integer i : result1) {// list of returned results
run(); // i have loop call to the Asynchronous method                           
...
}

@Asynchronous
public run()
{
for(int i=0;i<500;i++)
                {
                        try {
                                Thread.sleep(5);
                                System.out.println("XXXXX"+Thread.currentThread().getName()+"XXXXX");
                        } catch (InterruptedException e) {
                                e.printStackTrace();
                        }
                        
                }
}

and the Result is :

"XXXXX Thread 1 XXXXX"
"XXXXX Thread 1 XXXXX"
"XXXXX Thread 1 XXXXX"
"XXXXX Thread 1 XXXXX"
..
"XXXXX Thread 2 XXXXX"
"XXXXX Thread 2 XXXXX"
"XXXXX Thread 2 XXXXX"
"XXXXX Thread 2 XXXXX"
..
"XXXXX Thread 3 XXXXX"
"XXXXX Thread 3 XXXXX"
"XXXXX Thread 3 XXXXX"
..

so it works in a sequential way so no Multithreading thats why i turned to java.lang.Thread and in that case the only problem is  i cant get my EntityManager in that Thread

Thanks,
Assem.

[mwohlf]

like seam's in/outjection this probably doesn't work since you call the async method from the same component, try to inject the component and call the async method from a different component, there is an example in the docs:

http://docs.jboss.org/seam/2.2.1.CR1/reference/en-US/html_single/

[lvdberg]

Hi,

You're working with Seam and intercepted methods, so the first call method1 is intercepted. But the internal call to run NOT, meaning the Asynchronous annotation is not seen/used.

If you want to do something Async processing, call another bean and it will be intercepted correctly. So something like:

@Name("bean1")
class Bean1

@In Bean2 bean2;

public void method(){

bean2.run();
}

@Name("bean1")
class Bean2

@Asynchronous
public void run(){
 // Do what you want to do
}

}

A much cleaner method is calling the second bean with an Event, this enables you to separate both beans, and you don´t need any injecting.

Leo

[assem]

Thank you so Much Leo, both method worked very well, really thanks to you.
Have sweet day
Assem