MessageReceiver

```
@Documented
@Retention(RUNTIME)
@Qualifier
@Target({TYPE,METHOD})
public @interface MessageReceiver
```
This qualifier must be placed on any hk2 descriptor that can receive messages. This includes message receiver classes automatically analyzed by hk2, or any Factory.provide() methods automatically analyzed by hk2 or any user-defined Descriptor who can receive messages

- Field Summary
  
  Fields
  Modifier and Type Fields Description
  
  static java.lang.String EVENT_RECEIVER_TYPES
- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  java.lang.Class<?>[] value
  A list of message types that this service may receive.

- Field Detail
  - EVENT_RECEIVER_TYPES
```
static final java.lang.String EVENT_RECEIVER_TYPES
```
- Element Detail
  - value
```
@Metadata("org.glassfish.hk2.messaging.messageReceiverTypes")
java.lang.Class<?>[] value
```
    A list of message types that this service may receive. The default value of an empty array represents any message type. Be warned that if the default value is used that any event being fired will cause the descriptor with this qualifier to get reified (classloaded) which may be expensive. In order to have a more efficient application it is better to fill this value in with all the event types this service might receive
    
    Returns:
    
    A list of the classes that might be received as topic messages. If the empty set then this class might receive any topic event
    
    Default:
    
    {}