Module dk.cloudcreate.essentials.reactive

Package dk.cloudcreate.essentials.reactive

Class AnnotatedEventHandler

java.lang.Object

dk.cloudcreate.essentials.reactive.AnnotatedEventHandler

All Implemented Interfaces:

EventHandler

public class AnnotatedEventHandler
extends Object
implements EventHandler

Extending this class will allow you to colocate multiple related Event handling methods inside the same class and use it together with the LocalEventBus
Each method must accept a single Event argument, return void and be annotated with the Handler annotation.
The method argument type is matched against the concrete event type using Class.isAssignableFrom(Class).
The method accessibility can be any combination of private, protected, public, etc.
Example:

 public class OrderEventsHandler extends AnnotatedEventHandler {

     @EventHandler
     void handle(OrderCreated event) {
     }

     @EventHandler
     void handle(OrderCancelled event) {
     }
 }

Example of registering the AnnotatedEventHandler with the LocalEventBus:

 LocalEventBus localEventBus    = new LocalEventBus("TestBus", 3, (failingSubscriber, event, exception) -> log.error("...."));
 localEventBus.addAsyncSubscriber(new OrderEventsHandler(...));
 localEventBus.addSyncSubscriber(new OrderEventsHandler(...));
 

Constructor Summary

Constructors

Constructor	Description
AnnotatedEventHandler()	Create an AnnotatedEventHandler that can resolve and invoke event handler methods, i.e.
AnnotatedEventHandler(Object invokeEventHandlerMethodsOn)	Create an AnnotatedEventHandler that can resolve and invoke event handler methods, i.e.

Method Summary

Modifier and Type	Method	Description
final void	handle(Object event)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AnnotatedEventHandler

public AnnotatedEventHandler(Object invokeEventHandlerMethodsOn)

Create an AnnotatedEventHandler that can resolve and invoke event handler methods, i.e. methods annotated with @Handler, on another object

Parameters:

invokeEventHandlerMethodsOn - the object that contains the @Handler annotated methods

AnnotatedEventHandler

public AnnotatedEventHandler()

Create an AnnotatedEventHandler that can resolve and invoke event handler methods, i.e. methods annotated with @Handler, on this concrete subclass of AnnotatedEventHandler

Method Details

handle

public final void handle(Object event)

Specified by:

handle in interface EventHandler