Why Can't CDI Find My Producer? - cdi

Question

For some reason CDI seems unable to inject a string into a WebSocket ServerEndpoint. I am receiving the error Unsatisfied dependencies for type String with qualifiers #HelloMessage. I've included the Producer and ServerEndpoint implementations below. Any ideas? Injection seems to work if I create a custom class (say Messenger) and produce that instead of String.
Qualifier Implementation
import javax.inject.Qualifier;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
#Qualifier
#Retention(RUNTIME)
#Target({TYPE, METHOD, FIELD, PARAMETER})
public
#interface HelloMessage
{
}
Producer Implementation
import java.io.Serializable;
import javax.inject.Named;
import javax.ws.rs.Produces;
public
class StringProducer
implements Serializable
{
#Produces
#HelloMessage
public
String getMessage()
{
return "Hello, from Message!";
}
}
ServerEndpoint Implementation
import javax.inject.Inject;
import javax.inject.Named;
import javax.websocket.OnMessage;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;
#ServerEndpoint(value = "/test")
public
class TestEndpoint
{
#OnMessage
public
void onMessage(Session session, String unused)
{
System.out.println(this.message);
}
#Inject #HelloMessage
private String message;
}

Answer 1

I needed to import javax.enterprise.inject.Produces instead of javax.ws.rs.Produces when defining the Producer.
Producer Implementation
import java.io.Serializable;
import javax.inject.Named;
import javax.enterprise.inject.Produces;
public
class StringProducer
implements Serializable
{
#Produces
#HelloMessage
public
String getMessage()
{
return "Hello, from Message!";
}
}