| 1 | package com.hammurapi.eventbus.local; |
| 2 | |
| 3 | import java.lang.reflect.Array; |
| 4 | import java.util.ArrayList; |
| 5 | import java.util.Collection; |
| 6 | import java.util.List; |
| 7 | import java.util.Map; |
| 8 | import java.util.concurrent.Callable; |
| 9 | import java.util.concurrent.ExecutorService; |
| 10 | import java.util.concurrent.Future; |
| 11 | import java.util.concurrent.atomic.AtomicReference; |
| 12 | |
| 13 | import com.hammurapi.eventbus.AbstractEventBus; |
| 14 | import com.hammurapi.eventbus.AbstractEventBus.Handle; |
| 15 | import com.hammurapi.eventbus.EventHandlerWrapper; |
| 16 | import com.hammurapi.eventbus.EventStore; |
| 17 | import com.hammurapi.eventbus.PredicatedInferenceNode; |
| 18 | import com.hammurapi.extract.Extractor; |
| 19 | import com.hammurapi.extract.Predicate; |
| 20 | |
| 21 | class LocalPredicatedInferenceNode<E, P extends Comparable<P>, C, S extends EventStore<E, P, C, AbstractEventBus.Handle<E, P, C, Long>, S>> extends PredicatedInferenceNode<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> { |
| 22 | |
| 23 | private final class CollectorTask implements Callable<Collection<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>>> { |
| 24 | private final E event; |
| 25 | private final AtomicReference<Collection<Future<Collection<EventHandlerWrapper<E, P, C, Long, Handle<E, P, C, Long>, S>>>>> collector; |
| 26 | private final ExecutorService executor; |
| 27 | private final Map<C, Map<Extractor<E, ? super Boolean, C>, ? super Boolean>> cache; |
| 28 | |
| 29 | private CollectorTask( |
| 30 | E event, |
| 31 | AtomicReference<Collection<Future<Collection<EventHandlerWrapper<E, P, C, Long, Handle<E, P, C, Long>, S>>>>> collector, |
| 32 | ExecutorService executor, |
| 33 | Map<C, Map<Extractor<E, ? super Boolean, C>, ? super Boolean>> cache) { |
| 34 | this.event = event; |
| 35 | this.collector = collector; |
| 36 | this.executor = executor; |
| 37 | this.cache = cache; |
| 38 | } |
| 39 | |
| 40 | @Override |
| 41 | public Collection<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>> call() throws Exception { |
| 42 | @SuppressWarnings("unchecked") |
| 43 | E[] events = (E[]) Array.newInstance(matcher.getEventBus().getEventType(), 1); |
| 44 | events[0] = event; |
| 45 | |
| 46 | if (getPredicate().extract(getContext(), cache, events)) { |
| 47 | for (PredicatedInferenceNode<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> trueChild: trueChildren) { |
| 48 | trueChild.collectHandlers(cache, executor, collector, event); |
| 49 | } |
| 50 | return trueHandlers; |
| 51 | } else { |
| 52 | for (PredicatedInferenceNode<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> falseChild: falseChildren) { |
| 53 | falseChild.collectHandlers(cache, executor, collector, event); |
| 54 | } |
| 55 | return falseHandlers; |
| 56 | } |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | public LocalPredicatedInferenceNode( |
| 61 | LocalPredicatedInferenceNode<E, P, C, S> parent, |
| 62 | LocalPredicateChainingMatcher<E,P,C,S> matcher, |
| 63 | Predicate<E, C> predicate, |
| 64 | C context, |
| 65 | Long id) { |
| 66 | super(parent, matcher, predicate, context, id); |
| 67 | } |
| 68 | |
| 69 | private List<PredicatedInferenceNode<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>> falseChildren = new ArrayList<PredicatedInferenceNode<E,P,C,Long, AbstractEventBus.Handle<E, P, C, Long>, S>>(); |
| 70 | private List<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>> falseHandlers = new ArrayList<EventHandlerWrapper<E,P,C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>>(); |
| 71 | private List<PredicatedInferenceNode<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>> trueChildren = new ArrayList<PredicatedInferenceNode<E,P,C,Long, AbstractEventBus.Handle<E, P, C, Long>, S>>(); |
| 72 | private List<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>> trueHandlers = new ArrayList<EventHandlerWrapper<E,P,C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>>(); |
| 73 | |
| 74 | @Override |
| 75 | protected Callable<Collection<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>>> createCollectorTask( |
| 76 | Map<C, Map<Extractor<E, ? super Boolean, C>, ? super Boolean>> cache, |
| 77 | ExecutorService executor, |
| 78 | AtomicReference<Collection<Future<Collection<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>>>>> collector, |
| 79 | E event) { |
| 80 | |
| 81 | return new CollectorTask(event, collector, executor, cache); |
| 82 | } |
| 83 | |
| 84 | @Override |
| 85 | protected List<PredicatedInferenceNode<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>> getFalseChildren() { |
| 86 | return falseChildren; |
| 87 | } |
| 88 | |
| 89 | @Override |
| 90 | protected List<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>> getFalseHandlers() { |
| 91 | return falseHandlers; |
| 92 | } |
| 93 | |
| 94 | @Override |
| 95 | protected List<PredicatedInferenceNode<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>> getTrueChildren() { |
| 96 | return trueChildren; |
| 97 | } |
| 98 | |
| 99 | @Override |
| 100 | protected List<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>> getTrueHandlers() { |
| 101 | return trueHandlers; |
| 102 | } |
| 103 | |
| 104 | @Override |
| 105 | public String toString() { |
| 106 | return "LocalPredicatedInferenceNode [hashCode()=" +Integer.toHexString(hashCode())+"]"; //+ " getPredicate()=" + getPredicate() + "]"; |
| 107 | } |
| 108 | |
| 109 | |
| 110 | } |