Activation (Jakarta EE Platform API)

```
@Documented
@Retention(RUNTIME)
@Target(TYPE)
public @interface Activation
```
Designates a JavaBean as an ActivationSpec. This annotation may be placed on a JavaBean. A JavaBean annotated with the Activation annotation is not required to implement the ActivationSpec interface.
The ActivationSpec JavaBean contains the configuration information pertaining to inbound connectivity from an EIS instance. A resource adapter capable of message delivery to message endpoints must provide an JavaBean class implementing the ActivationSpec interface or annotate a JavaBean with the Activation annotation for each supported endpoint message listener type.
The ActivationSpec JavaBean has a set of configurable properties specific to the messaging style and the message provider.
Together with the messageListener annotation element, this annotation specifies information about a specific message listener type supported by the messaging resource adapter.

Since:

1.6

- Required Element Summary
  
  Required Elements
  Modifier and Type Required Element Description
  
  Class[] messageListeners
  Indicates the message listener type(s) associated with this activation.

- Element Detail
  - messageListeners
```
Class[] messageListeners
```
    Indicates the message listener type(s) associated with this activation.
    
    Returns:
    
    The Java types of the Message Listener interface this activation-spec is associated with.