Weld for Java SE creates mysterious extra instance of a bean
Hi,
I have create a simple proof-of-concept app that shows that Weld is creating a mysterious extra instance of a bean. Before I am submitting this as a bug I wanted to make sure I am not wrong or something. So here's the code:
The Member bean:
package org.behrang.misc.weldse;
public class Member {
public static int NEXT_ID = 1;
private Integer id;
public Member() {
System.out.println("Entering Member.Member(): " + NEXT_ID);
id = NEXT_ID++;
}
public Integer getId() {
return id;
}
}The SimpleMember qualified:
package org.behrang.misc.weldse;
import javax.inject.Qualifier;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Qualifier
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.FIELD})
public @interface SimpleMember {
}The MemberProducer:
package org.behrang.misc.weldse;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Produces;
@ApplicationScoped
public class MemberProducer {
@Produces
@SimpleMember
@ApplicationScoped
public Member getNextMember() {
return new Member();
}
}The Main class:
package org.behrang.misc.weldse;
import org.jboss.weld.environment.se.bindings.Parameters;
import org.jboss.weld.environment.se.events.ContainerInitialized;
import javax.enterprise.event.Observes;
import javax.inject.Inject;
import javax.inject.Singleton;
import java.util.List;
@Singleton
public class Main {
@Inject
@SimpleMember
private Member member1;
@Inject
@SimpleMember
private Member member2;
@Inject
@SimpleMember
private Member member3;
void start(@Observes final ContainerInitialized event, @Parameters List<String> parameters) {
System.out.println(member1.getId());
System.out.println(member2.getId());
System.out.println(member3.getId());
System.out.println(member1 == member2);
System.out.println(member2 == member3);
}
}Expected output:
Entering Member.Member(): 1 1 1 1 true true
Actual output:
Entering Member.Member(): 1 Entering Member.Member(): 2 2 2 2 true true
I expected Weld to create only one instance of Member with id = 1, but it creates one ghost
member with id = 1 and another one with id = 2 that is assigned to the injected fields of Main.
Is this indeed a bug?
