| 1 | package com.hammurapi.eventbus.local; |
| 2 | |
| 3 | import java.util.Queue; |
| 4 | |
| 5 | import com.hammurapi.eventbus.AbstractEventBus; |
| 6 | import com.hammurapi.eventbus.AbstractEventBus.Handle; |
| 7 | import com.hammurapi.eventbus.EventDispatchContext; |
| 8 | import com.hammurapi.eventbus.EventHandler; |
| 9 | import com.hammurapi.eventbus.EventHandlerBase.Mode; |
| 10 | import com.hammurapi.eventbus.EventStore; |
| 11 | import com.hammurapi.eventbus.InferenceCommand; |
| 12 | import com.hammurapi.eventbus.InferenceContext; |
| 13 | import com.hammurapi.eventbus.InferencePolicy; |
| 14 | import com.hammurapi.eventbus.PostCommand; |
| 15 | import com.hammurapi.eventbus.RemoveCommand; |
| 16 | import com.hammurapi.extract.Predicate; |
| 17 | |
| 18 | class LocalEventDispatchContextImpl<E, P extends Comparable<P>, C, S extends EventStore<E, P, C, AbstractEventBus.Handle<E, P, C, Long>, S>> implements EventDispatchContext<E, P, C, AbstractEventBus.Handle<E,P,C,Long>, S> { |
| 19 | |
| 20 | static ThreadLocal<LocalEventDispatchContextImpl<?, ?, ?, ?>> threadContext = new ThreadLocal<LocalEventDispatchContextImpl<?,?,?,?>>(); |
| 21 | |
| 22 | private Handle<E,P,C,Long>[] handles; |
| 23 | private Long registrationKey; |
| 24 | private E[] events; |
| 25 | private EventHandler<E, P, C, AbstractEventBus.Handle<E,P,C,Long>, S> eventHandler; |
| 26 | |
| 27 | private Mode mode; |
| 28 | |
| 29 | private InferenceContext<E, P, C, Long, Handle<E, P, C, Long>, S> inferenceContext; |
| 30 | |
| 31 | public LocalEventDispatchContextImpl( |
| 32 | InferenceContext<E, P, C, Long, AbstractEventBus.Handle<E,P,C,Long>, S> inferenceContext, |
| 33 | EventHandler<E, P, C, AbstractEventBus.Handle<E,P,C,Long>, S> eventHandler, |
| 34 | Long registrationKey, |
| 35 | Handle<E,P,C,Long>[] handles, |
| 36 | E[] events, |
| 37 | Mode mode) { |
| 38 | this.inferenceContext = inferenceContext; |
| 39 | this.handles = handles; |
| 40 | this.registrationKey = registrationKey; |
| 41 | this.events = events; |
| 42 | this.eventHandler = eventHandler; |
| 43 | this.mode = mode; |
| 44 | } |
| 45 | |
| 46 | @Override |
| 47 | public void consume(int index) { |
| 48 | if (!eventHandler.consumes()) { |
| 49 | throw new IllegalStateException("This handler's declared that it doesn't consume events"); |
| 50 | } |
| 51 | InferenceCommand<E, P, C, Long, Handle<E, P, C, Long>, S> consumeCommand = new RemoveCommand<E, P, C, Long, Handle<E, P, C, Long>, S>(handles[index], registrationKey, eventHandler, inferenceContext, false, handles); |
| 52 | inferenceContext.postInferenceCommand(consumeCommand); |
| 53 | } |
| 54 | |
| 55 | @Override |
| 56 | public void consume(E event) { |
| 57 | for (int i=0; i<events.length; ++i) { |
| 58 | if (event==events[i]) { |
| 59 | consume(i); |
| 60 | } |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | @Override |
| 65 | public void post(E event, Predicate<E, S>... validators) { |
| 66 | InferenceCommand<E, P, C, Long, Handle<E, P, C, Long>, S> postCommand = new PostCommand<E, P, C, Long, Handle<E, P, C, Long>, S>(event, false, registrationKey, eventHandler, handles, inferenceContext, validators); |
| 67 | inferenceContext.postInferenceCommand(postCommand); |
| 68 | } |
| 69 | |
| 70 | @Override |
| 71 | public void removeHandler() { |
| 72 | inferenceContext.getBus().removeHandlers(registrationKey); |
| 73 | } |
| 74 | |
| 75 | @Override |
| 76 | public void update(E event) { |
| 77 | for (int i=0; i<events.length; ++i) { |
| 78 | if (event==events[i]) { |
| 79 | if (handles[i] instanceof FacadeHandle) { |
| 80 | update(((FacadeHandle<E,P,C,S>) handles[i]).getMaster()); |
| 81 | } else { |
| 82 | update((MasterHandle<E, P, C, S>) handles[i]); |
| 83 | } |
| 84 | } |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | void update(MasterHandle<E, P, C, S> handle) { |
| 89 | InferenceCommand<E, P, C, Long, Handle<E, P, C, Long>, S> removeCommand = new RemoveCommand<E, P, C, Long, Handle<E, P, C, Long>, S>(handle, registrationKey, eventHandler, inferenceContext, true, handles); |
| 90 | inferenceContext.postInferenceCommand(removeCommand); |
| 91 | |
| 92 | InferenceCommand<E, P, C, Long, Handle<E, P, C, Long>, S> postCommand = new PostCommand<E, P, C, Long, Handle<E, P, C, Long>, S>(handle, registrationKey, eventHandler, handles, inferenceContext); |
| 93 | inferenceContext.postInferenceCommand(postCommand); |
| 94 | } |
| 95 | |
| 96 | @Override |
| 97 | public S getEventStore() { |
| 98 | return (S) ((LocalEventBusBase) inferenceContext.getBus()).unmodifiableStore; |
| 99 | } |
| 100 | |
| 101 | @Override |
| 102 | public Mode getMode() { |
| 103 | return mode; |
| 104 | } |
| 105 | |
| 106 | } |