| 1 | package com.hammurapi.eventbus; |
| 2 | |
| 3 | import java.io.Serializable; |
| 4 | import java.util.Iterator; |
| 5 | import java.util.logging.Level; |
| 6 | import java.util.logging.Logger; |
| 7 | |
| 8 | import com.hammurapi.eventbus.AbstractEventBus.Handle; |
| 9 | import com.hammurapi.eventbus.EventHandlerBase.Mode; |
| 10 | import com.hammurapi.eventbus.local.LocalEventBusBase; |
| 11 | import com.hammurapi.extract.Predicate; |
| 12 | |
| 13 | class RetractTask<E,P extends Comparable<P>,C,K, H extends AbstractEventBus.Handle<E,P,C,K>, S extends EventStore<E,P,C,H,S>> implements Runnable, Serializable { |
| 14 | private static final Logger logger = Logger.getLogger(HandlerTask.class.getName()); |
| 15 | |
| 16 | private RetractCommand<E, P, C, K, H, S> retractCommand; |
| 17 | |
| 18 | private InferenceContext<E, P, C, K, H, S> inferenceContext; |
| 19 | |
| 20 | RetractTask( |
| 21 | RetractCommand<E, P, C, K, H, S> retractCommand, |
| 22 | InferenceContext<E, P, C, K, H, S> inferenceContext) { |
| 23 | this.retractCommand = retractCommand; |
| 24 | this.inferenceContext = inferenceContext; |
| 25 | } |
| 26 | |
| 27 | @Override |
| 28 | public void run() { |
| 29 | try { |
| 30 | processCommand(retractCommand, inferenceContext); |
| 31 | } catch (Exception e) { |
| 32 | logger.log(Level.SEVERE, "Exception during event handling: "+e, e); |
| 33 | if (inferenceContext.getBus().getExceptionHandler()!=null) { |
| 34 | inferenceContext.getBus().getExceptionHandler().handleException(e); |
| 35 | } |
| 36 | if (inferenceContext.getRootHandle()!=null) { |
| 37 | inferenceContext.getRootHandle().handleException(e); |
| 38 | } |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | static <E,P extends Comparable<P>,C,K, H extends AbstractEventBus.Handle<E,P,C,K>, S extends EventStore<E,P,C,H,S>> void processCommand( |
| 43 | RetractCommand<E, P, C, K, H, S> retractCommand, |
| 44 | InferenceContext<E,P,C,K,H,S> iContext) { |
| 45 | |
| 46 | final InferenceContext<E,P,C,K,H,S> inferenceContext = InferencePolicy.AFTER_HANDLER.equals(iContext.getBus().getInferencePolicy()) ? iContext.wrap() : iContext; |
| 47 | |
| 48 | EventDispatchContext<E, P, C, H, S> context = new EventDispatchContext<E, P, C, H, S>() { |
| 49 | |
| 50 | @Override |
| 51 | public void post(E event, Predicate<E, S>... validators) { |
| 52 | // Post from remove handler is considered a direct post. |
| 53 | InferenceCommand<E, P, C, K, H, S> postCommand = new PostCommand<E, P, C, K, H, S>(event, true, null, null, null, inferenceContext.createNext(), validators); |
| 54 | inferenceContext.postInferenceCommand(postCommand); |
| 55 | } |
| 56 | |
| 57 | @Override |
| 58 | public void consume(int index) { |
| 59 | throw new UnsupportedOperationException("This method is not supported in REMOVE mode"); |
| 60 | } |
| 61 | |
| 62 | @Override |
| 63 | public void consume(E event) { |
| 64 | throw new UnsupportedOperationException("This method is not supported in REMOVE mode"); |
| 65 | } |
| 66 | |
| 67 | @Override |
| 68 | public void update(E event) { |
| 69 | throw new UnsupportedOperationException("This method is not supported in REMOVE mode"); |
| 70 | } |
| 71 | |
| 72 | @Override |
| 73 | public void removeHandler() { |
| 74 | throw new UnsupportedOperationException("This method is not supported in REMOVE mode"); |
| 75 | // bus.removeHandlers(registrationKey); |
| 76 | } |
| 77 | |
| 78 | @Override |
| 79 | public S getEventStore() { |
| 80 | return inferenceContext.getBus().getStore(); |
| 81 | } |
| 82 | |
| 83 | @Override |
| 84 | public Mode getMode() { |
| 85 | return Mode.REMOVE; |
| 86 | } |
| 87 | |
| 88 | }; |
| 89 | |
| 90 | retractCommand.getHandler().post(context, retractCommand.getEvents()); |
| 91 | |
| 92 | // If no exception - post events |
| 93 | if (InferencePolicy.AFTER_HANDLER.equals(inferenceContext.getBus().getInferencePolicy())) { |
| 94 | inferenceContext.processInferenceCommands(); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | } |
| 99 | |