Seam Injection Issue

[pushpak1981]

Hi All,

I have two Components defined at Application Scoped which are loaded when the server starts (using @startup Annotation). I wanted to access some variables from first component into second component. I have used @out annotation to outject and variable and @In annotation to inject into other component. But i am getting null values when it is injected.

Component1:
@Out(scope ScopeType.APPLICATION,value executionService)
public ExecutionService executionService;

Component2:
@In(value executionService)
public ExecutionService executionService;

Any Help would be highly appreciated.

Thanks.

[ivan.indrawan]

The way I do it is as follow: ComponentA is created first

@Name("ComponentA")
@Scope(ScopeType.APPLICATION)
@Startup
public class ComponentA {
    String myProperty;

    @Create
    public void onCreate() {
        myProperty="blah";
    }
}

When ComponentB is created, the ComponentA is injected to B

@Name("ComponentB")
@Scope(ScopeType.APPLICATION)
@Startup
@Install(depends="ComponentA")
public class ComponentB {

    @In
    ComponentA a;

    @Create
    public void onCreate {
        System.out.println(a.getMyProperty());
    }

}

Hope it helps.

[pushpak1981]

Thanks for the reply. I tried executing the code but it gives me NullPointerException in componentB while accessing the getMyProperty.The ComponentA is not injected. We are using Seam 2.1.

[niox.nikospara.yahoo.com]

Hi,

Did you try the Factory Components, as described in ch 4.8 of Seam 2.2.0 documentation?