1 | package com.hammurapi.eventbus.local; |
2 | |
3 | import java.lang.reflect.Array; |
4 | import java.util.Arrays; |
5 | import java.util.concurrent.atomic.AtomicBoolean; |
6 | |
7 | import com.hammurapi.eventbus.AbstractEventBus; |
8 | import com.hammurapi.eventbus.AbstractEventBus.Handle; |
9 | import com.hammurapi.eventbus.EventHandler; |
10 | import com.hammurapi.eventbus.EventStore; |
11 | import com.hammurapi.eventbus.InferenceContext; |
12 | import com.hammurapi.eventbus.RetractCommand; |
13 | |
14 | /** |
15 | * Stores handles and handler for posting retract command. |
16 | * @author Pavel Vlasov |
17 | * |
18 | */ |
19 | class RemoveListener<E, P extends Comparable<P>, C, S extends EventStore<E,P,C,AbstractEventBus.Handle<E,P,C,Long>,S>> { |
20 | |
21 | /** |
22 | * @return Handler which posted this event. |
23 | */ |
24 | private EventHandler<E, P, C, AbstractEventBus.Handle<E,P,C,Long>, S> handler; |
25 | |
26 | /** |
27 | * @return List of handler inputs which produced this event. |
28 | */ |
29 | private E[] events; |
30 | |
31 | private Long handlerId; |
32 | |
33 | RemoveListener( |
34 | EventHandler<E, P, C, Handle<E, P, C, Long>, S> handler, |
35 | Long handlerId, |
36 | Handle<E, P, C, Long>[] handles, |
37 | Class<E> eventType) { |
38 | super(); |
39 | this.handler = handler; |
40 | this.handlerId = handlerId; |
41 | events = (E[]) Array.newInstance(eventType, handles.length); |
42 | for (int i=0; i<events.length; ++i) { |
43 | events[i] = handles[i].getEvent(); |
44 | } |
45 | } |
46 | |
47 | private AtomicBoolean fired = new AtomicBoolean(); |
48 | |
49 | void postRetractCommand(InferenceContext<E, P, C, Long, Handle<E, P, C, Long>, S> inferenceContext) { |
50 | if (!fired.getAndSet(true)) { |
51 | inferenceContext.postInferenceCommand(new RetractCommand<E, P, C, Long, AbstractEventBus.Handle<E,P,C,Long>, S>(events, handlerId, handler, inferenceContext.createNext())); |
52 | } |
53 | } |
54 | |
55 | } |