JBoss Weld CDI : Inject the same instance in two different Objects

问题

I have two basis class A and B. B is injected in A. I have a third class C injected in A and B, as follow :

class A {
    @Inject B b;
    @Inject C c;
}

class B {
    @Inject C c;
}

class C {

}

I'd like the instance of C contained in A and in B is the same. I could use a setC() method in B, but that's not at all the philosophia of injection. Should I use Weld scopes ? If yes, how should I do ?

Thanks

回答1:

The solution is simply annotate my classes and injections with @Singleton Annotation

class A {
    @Inject B b;
    @Inject @Singleton C c;
}

class B {
    @Inject @Singleton C c;
}

@Singleton
class C {

}

来源：https://stackoverflow.com/questions/8502836/jboss-weld-cdi-inject-the-same-instance-in-two-different-objects