| 1 | package com.hammurapi.eventbus.local; |
| 2 | |
| 3 | import java.lang.reflect.Array; |
| 4 | import java.util.ArrayList; |
| 5 | import java.util.Arrays; |
| 6 | import java.util.Collection; |
| 7 | import java.util.Collections; |
| 8 | import java.util.Comparator; |
| 9 | import java.util.Iterator; |
| 10 | import java.util.List; |
| 11 | import java.util.Set; |
| 12 | import java.util.concurrent.ExecutorService; |
| 13 | import java.util.concurrent.atomic.AtomicBoolean; |
| 14 | import java.util.concurrent.atomic.AtomicLong; |
| 15 | import java.util.concurrent.locks.Lock; |
| 16 | import java.util.concurrent.locks.ReadWriteLock; |
| 17 | import java.util.concurrent.locks.ReentrantLock; |
| 18 | import java.util.concurrent.locks.ReentrantReadWriteLock; |
| 19 | import java.util.logging.Level; |
| 20 | import java.util.logging.Logger; |
| 21 | |
| 22 | import com.hammurapi.common.Joiner; |
| 23 | import com.hammurapi.common.Joiner.Collector; |
| 24 | import com.hammurapi.eventbus.AbstractEventBus; |
| 25 | import com.hammurapi.eventbus.AbstractEventBus.Handle; |
| 26 | import com.hammurapi.eventbus.AbstractEventBus.Snapshot; |
| 27 | import com.hammurapi.eventbus.CompositeContext; |
| 28 | import com.hammurapi.eventbus.DispatchNetworkException; |
| 29 | import com.hammurapi.eventbus.EventBus; |
| 30 | import com.hammurapi.eventbus.EventDispatchContext; |
| 31 | import com.hammurapi.eventbus.EventDispatchException; |
| 32 | import com.hammurapi.eventbus.EventDispatchJoinContext; |
| 33 | import com.hammurapi.eventbus.EventHandler; |
| 34 | import com.hammurapi.eventbus.EventHandlerBase.Mode; |
| 35 | import com.hammurapi.eventbus.EventHandlerWrapper; |
| 36 | import com.hammurapi.eventbus.EventStore; |
| 37 | import com.hammurapi.eventbus.InferenceCommand; |
| 38 | import com.hammurapi.eventbus.InferenceContext; |
| 39 | import com.hammurapi.eventbus.InferencePolicy; |
| 40 | import com.hammurapi.eventbus.PredicateChainingMatcher; |
| 41 | import com.hammurapi.eventbus.local.LocalEventBusBase.LocalHandle; |
| 42 | import com.hammurapi.extract.Predicate; |
| 43 | import com.hammurapi.extract.True; |
| 44 | |
| 45 | /** |
| 46 | * This matcher does matching in a straightforward way - it evaluates handler predicates sequentially, it does not cache extracted values, does not |
| 47 | * optimize event joins, and does not use executor service. The purpose of this matcher is to help with debugging and troubleshooting of handler/predicate |
| 48 | * logic and to be a baseline of matching performance. |
| 49 | * |
| 50 | * This matcher doesn't support snapshots. |
| 51 | * |
| 52 | * @author Pavel Vlasov |
| 53 | * |
| 54 | * @param <E> |
| 55 | * @param <P> |
| 56 | * @param <C> |
| 57 | * @param <K> |
| 58 | * @param <H> |
| 59 | * @param <S> |
| 60 | */ |
| 61 | public class LocalSimpleMatcher<E, P extends Comparable<P>, C, S extends EventStore<E,P,C,AbstractEventBus.Handle<E, P, C, Long>,S>> implements LocalMatcher<E,P,C,S> { |
| 62 | private static final Logger logger = Logger.getLogger(PredicateChainingMatcher.class.getName()); |
| 63 | private EventBus<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> eventBus; |
| 64 | |
| 65 | protected Collection<EventHandlerWrapper<E,P,C,Long, AbstractEventBus.Handle<E, P, C, Long>,S>> wrappers = new ArrayList<EventHandlerWrapper<E,P,C,Long, AbstractEventBus.Handle<E, P, C, Long>,S>>(); |
| 66 | private ReadWriteLock lock = new ReentrantReadWriteLock(); |
| 67 | |
| 68 | /** |
| 69 | * Lock for the inference network. |
| 70 | * @return |
| 71 | */ |
| 72 | protected ReadWriteLock getLock() { |
| 73 | return lock; |
| 74 | } |
| 75 | |
| 76 | private AtomicLong handlerCounter = new AtomicLong(-1); |
| 77 | |
| 78 | protected Long nextId() { |
| 79 | LocalEventBusBase<E, P, C, S> localEventBusBase = (LocalEventBusBase<E,P,C,S>) eventBus; |
| 80 | return localEventBusBase==null ? handlerCounter.decrementAndGet() : localEventBusBase.nextId(); |
| 81 | } |
| 82 | |
| 83 | @Override |
| 84 | public Long addHandler(final EventHandler<E, P, C, AbstractEventBus.Handle<E, P, C, Long>, S> eventHandler) { |
| 85 | if (eventHandler.getCardinality()<1) { |
| 86 | throw new DispatchNetworkException("Handler cardinality cannot be less than one."); |
| 87 | } |
| 88 | getLock().writeLock().lock(); |
| 89 | try { |
| 90 | final Long registrationKey = nextId(); |
| 91 | final Set<Long> keySet = Collections.unmodifiableSet(Collections.singleton(registrationKey)); |
| 92 | if (eventHandler.getCardinality()==1) { |
| 93 | EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> w = new EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>() { |
| 94 | |
| 95 | @Override |
| 96 | public boolean consumes() { |
| 97 | return eventHandler.consumes(); |
| 98 | } |
| 99 | |
| 100 | @Override |
| 101 | public P getPriority() { |
| 102 | return eventHandler.getPriority(); |
| 103 | } |
| 104 | |
| 105 | @Override |
| 106 | public int getCardinality() { |
| 107 | return eventHandler.getCardinality(); |
| 108 | } |
| 109 | |
| 110 | @Override |
| 111 | public void reset() { |
| 112 | eventHandler.reset(); |
| 113 | } |
| 114 | |
| 115 | @Override |
| 116 | public C getContext() { |
| 117 | return eventHandler.getContext(); |
| 118 | } |
| 119 | |
| 120 | @Override |
| 121 | public boolean isOneOff() { |
| 122 | return eventHandler.isOneOff(); |
| 123 | } |
| 124 | |
| 125 | @Override |
| 126 | public Mode getMode() { |
| 127 | return eventHandler.getMode(); |
| 128 | } |
| 129 | |
| 130 | private AtomicBoolean fired=new AtomicBoolean(false); |
| 131 | |
| 132 | @SuppressWarnings("unchecked") |
| 133 | @Override |
| 134 | public void post( |
| 135 | EventDispatchContext<E,P,C, AbstractEventBus.Handle<E,P,C,Long>, S> context, |
| 136 | InferenceContext<E,P,C,Long,AbstractEventBus.Handle<E,P,C,Long>,S> inferenceContext, |
| 137 | Handle<E,P,C,Long>... handles) { |
| 138 | if (!isOneOff() || !fired.getAndSet(true)) { |
| 139 | E[] events = (E[]) Array.newInstance(eventBus.getEventType(), handles.length); |
| 140 | for (int i=0; i<handles.length; ++i) { |
| 141 | if (handles[i].isValid()) { |
| 142 | events[i] = handles[i].getEvent(); |
| 143 | } else { |
| 144 | return; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | if (InferencePolicy.AFTER_HANDLER.equals(eventBus.getInferencePolicy())) { |
| 149 | |
| 150 | // if (inferenceContext.getInferenceCommandsQueue()!=null) { |
| 151 | // throw new IllegalArgumentException("Inference commands queue shall be null"); |
| 152 | // } |
| 153 | |
| 154 | inferenceContext = inferenceContext.wrap(); |
| 155 | } |
| 156 | |
| 157 | LocalEventDispatchContextImpl<E,P,C,S> dispatchContext; |
| 158 | |
| 159 | if (eventHandler.getMode()==Mode.POST || eventHandler.getMode()==Mode.BOTH) { |
| 160 | if (handles.length==1) { |
| 161 | dispatchContext = new LocalEventDispatchContextImpl<E, P, C, S>( |
| 162 | inferenceContext, |
| 163 | eventHandler, |
| 164 | registrationKey, |
| 165 | handles, |
| 166 | events, |
| 167 | Mode.POST); |
| 168 | } else { |
| 169 | dispatchContext = new LocalEventDispatchJoinContextImpl<E, P, C, S>( |
| 170 | inferenceContext, |
| 171 | eventHandler, |
| 172 | registrationKey, |
| 173 | handles, |
| 174 | events, |
| 175 | (EventDispatchJoinContext<E, P, C, AbstractEventBus.Handle<E,P,C,Long>, S>) context, |
| 176 | Mode.POST); |
| 177 | } |
| 178 | |
| 179 | LocalEventDispatchContextImpl.threadContext.set(dispatchContext); |
| 180 | try { |
| 181 | if (((LocalEventBusBase<E,P,C,S>) eventBus).isAssertPredicatesBeforePost()) { |
| 182 | if (!getPredicate().extract(getContext(), null, events)) { |
| 183 | throw new EventDispatchException("Handler predicate evaluated to false before post: "+getPredicate()+", handler "+eventHandler); |
| 184 | } |
| 185 | } |
| 186 | eventHandler.post(dispatchContext, events); |
| 187 | |
| 188 | // If no exception - post events |
| 189 | if (InferencePolicy.AFTER_HANDLER.equals(eventBus.getInferencePolicy())) { |
| 190 | inferenceContext.processInferenceCommands(); |
| 191 | } |
| 192 | } catch (Exception e) { |
| 193 | logger.log(Level.SEVERE, "Exception in event handler: "+e, e); |
| 194 | if (eventBus.getExceptionHandler()!=null) { |
| 195 | eventBus.getExceptionHandler().handleException(e); |
| 196 | } |
| 197 | if (inferenceContext.getRootHandle()!=null) { |
| 198 | inferenceContext.getRootHandle().handleException(e); |
| 199 | } |
| 200 | } finally { |
| 201 | LocalEventDispatchContextImpl.threadContext.set(null); |
| 202 | } |
| 203 | if (isOneOff()) { |
| 204 | ((LocalEventBusBase<E,P,C,S>) eventBus).removeHandlers(registrationKey); |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | if (eventHandler.getMode()==Mode.REMOVE || eventHandler.getMode()==Mode.BOTH) { |
| 209 | RemoveListener<E,P,C,S> removeListener = new RemoveListener<E, P, C, S>(eventHandler, registrationKey, handles, eventBus.getEventType()); |
| 210 | for (Handle<E,P,C,Long> handle: handles) { |
| 211 | ((LocalHandle<E,P,C,S>) handle).addRemoveListener(removeListener); |
| 212 | } |
| 213 | } |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | @Override |
| 218 | public Set<Long> getRegistrationKeys() { |
| 219 | return keySet; |
| 220 | } |
| 221 | |
| 222 | @Override |
| 223 | public EventHandler<E, P, C, AbstractEventBus.Handle<E, P, C, Long>, S> getHandler() { |
| 224 | return eventHandler; |
| 225 | } |
| 226 | |
| 227 | @Override |
| 228 | public void takeSnapshot(Snapshot<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> snapshot, Set<Long> taken) { |
| 229 | // NOP |
| 230 | } |
| 231 | |
| 232 | @Override |
| 233 | public Predicate<E, C> getPredicate() { |
| 234 | return eventHandler.getPredicate(); |
| 235 | } |
| 236 | |
| 237 | }; |
| 238 | wrappers.add(w); |
| 239 | } else { |
| 240 | HandleJoiner joiner = createJoiner(eventHandler, registrationKey); |
| 241 | for (int i=0; i<eventHandler.getCardinality(); ++i) { |
| 242 | wrappers.add(createJoinHandler(eventHandler, registrationKey, keySet, joiner, i)); |
| 243 | } |
| 244 | } |
| 245 | return registrationKey; |
| 246 | } finally { |
| 247 | getLock().writeLock().unlock(); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | private EventHandlerWrapper<E, P, C, Long, Handle<E, P, C, Long>, S> createJoinHandler( |
| 252 | final EventHandler<E, P, C, AbstractEventBus.Handle<E, P, C, Long>, S> eventHandler, |
| 253 | final Long registrationKey, |
| 254 | final Set<Long> keySet, |
| 255 | final HandleJoiner joiner, |
| 256 | final int idx) { |
| 257 | |
| 258 | return new EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>() { |
| 259 | |
| 260 | @Override |
| 261 | public boolean consumes() { |
| 262 | return eventHandler.consumes(); |
| 263 | } |
| 264 | |
| 265 | @Override |
| 266 | public P getPriority() { |
| 267 | return eventHandler.getPriority(); |
| 268 | } |
| 269 | |
| 270 | @Override |
| 271 | public int getCardinality() { |
| 272 | return eventHandler.getCardinality(); |
| 273 | } |
| 274 | |
| 275 | @Override |
| 276 | public void reset() { |
| 277 | eventHandler.reset(); |
| 278 | } |
| 279 | |
| 280 | @Override |
| 281 | public C getContext() { |
| 282 | return eventHandler.getContext(); |
| 283 | } |
| 284 | |
| 285 | @Override |
| 286 | public boolean isOneOff() { |
| 287 | return eventHandler.isOneOff(); |
| 288 | } |
| 289 | |
| 290 | @Override |
| 291 | public Mode getMode() { |
| 292 | return eventHandler.getMode(); |
| 293 | } |
| 294 | |
| 295 | @Override |
| 296 | public void post( |
| 297 | EventDispatchContext<E,P,C, AbstractEventBus.Handle<E,P,C,Long>, S> context, |
| 298 | InferenceContext<E,P,C,Long,AbstractEventBus.Handle<E,P,C,Long>,S> inferenceContext, |
| 299 | Handle<E,P,C,Long>... handles) { |
| 300 | |
| 301 | if (InferencePolicy.AFTER_HANDLER.equals(eventBus.getInferencePolicy())) { |
| 302 | |
| 303 | // if (inferenceContext.getInferenceCommandsQueue()!=null) { |
| 304 | // throw new IllegalArgumentException("Inference commands queue shall be null"); |
| 305 | // } |
| 306 | |
| 307 | inferenceContext = inferenceContext.wrap(); |
| 308 | } |
| 309 | |
| 310 | CompositeContext<E, P, C, Long, Handle<E, P, C, Long>, S> compositeContext = new CompositeContext<E, P, C, Long,AbstractEventBus.Handle<E,P,C,Long>, S>( |
| 311 | context, |
| 312 | eventHandler.getContext(), |
| 313 | inferenceContext); |
| 314 | |
| 315 | try { |
| 316 | joiner.addInput(idx, handles[0], compositeContext); |
| 317 | } catch (Exception e) { |
| 318 | logger.log(Level.SEVERE, "Join problem: "+e, e); |
| 319 | if (eventBus.getExceptionHandler()!=null) { |
| 320 | eventBus.getExceptionHandler().handleException(e); |
| 321 | } |
| 322 | if (inferenceContext.getRootHandle()!=null) { |
| 323 | inferenceContext.getRootHandle().handleException(e); |
| 324 | } |
| 325 | } finally { |
| 326 | if (InferencePolicy.AFTER_HANDLER.equals(eventBus.getInferencePolicy())) { |
| 327 | inferenceContext.processInferenceCommands(); |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | } |
| 332 | |
| 333 | @Override |
| 334 | public Set<Long> getRegistrationKeys() { |
| 335 | return keySet; |
| 336 | } |
| 337 | |
| 338 | @Override |
| 339 | public EventHandler<E, P, C, AbstractEventBus.Handle<E, P, C, Long>, S> getHandler() { |
| 340 | return eventHandler; |
| 341 | } |
| 342 | |
| 343 | @Override |
| 344 | public void takeSnapshot(Snapshot<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> snapshot, Set<Long> taken) { |
| 345 | // NOP |
| 346 | } |
| 347 | |
| 348 | @Override |
| 349 | public Predicate<E, C> getPredicate() { |
| 350 | /** |
| 351 | * Always returns true because predicate is evaluated in join(). |
| 352 | */ |
| 353 | return True.getInstance(); |
| 354 | } |
| 355 | |
| 356 | }; |
| 357 | } |
| 358 | |
| 359 | @Override |
| 360 | public Iterable<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>> match(E event, ExecutorService executorService) { |
| 361 | @SuppressWarnings("unchecked") |
| 362 | E[] events = (E[]) Array.newInstance(eventBus.getEventType(), 1); |
| 363 | events[0] = event; |
| 364 | |
| 365 | List<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>> ret = new ArrayList<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>>(); |
| 366 | getLock().readLock().lock(); |
| 367 | try { |
| 368 | for (EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> w: wrappers) { |
| 369 | if (w.getPredicate().extract(w.getContext(), null, events)) { |
| 370 | ret.add(w); |
| 371 | } |
| 372 | } |
| 373 | } finally { |
| 374 | getLock().readLock().unlock(); |
| 375 | } |
| 376 | |
| 377 | Collections.sort(ret, new Comparator<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>>() { |
| 378 | |
| 379 | @Override |
| 380 | public int compare(EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> o1, EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> o2) { |
| 381 | P p1 = o1.getPriority(); |
| 382 | P p2 = o2.getPriority(); |
| 383 | if (p2==null) { |
| 384 | return p1==null ? o2.hashCode() - o1.hashCode() : 1; |
| 385 | } |
| 386 | if (p1==null) { |
| 387 | return -1; |
| 388 | } |
| 389 | return p2.compareTo(p1); |
| 390 | } |
| 391 | |
| 392 | }); |
| 393 | |
| 394 | return ret; |
| 395 | } |
| 396 | |
| 397 | @Override |
| 398 | public void takeSnapshot(Snapshot<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> snapshot) { |
| 399 | // TODO - Implement. |
| 400 | throw new UnsupportedOperationException("LocalSimpleMatcher does not support takeSnapshot() operation"); |
| 401 | } |
| 402 | |
| 403 | @Override |
| 404 | public void removeHandlers(Iterable<Long> keys) { |
| 405 | getLock().writeLock().lock(); |
| 406 | try { |
| 407 | for (Long key: keys) { |
| 408 | Iterator<EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>> it = wrappers.iterator(); |
| 409 | Set<Long> rKeys = it.next().getRegistrationKeys(); |
| 410 | for (Long rKey: rKeys) { |
| 411 | if (rKey.equals(key)) { |
| 412 | it.remove(); |
| 413 | break; |
| 414 | } |
| 415 | } |
| 416 | } |
| 417 | } finally { |
| 418 | getLock().writeLock().unlock(); |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | @Override |
| 423 | public void reset() { |
| 424 | getLock().readLock().lock(); |
| 425 | try { |
| 426 | for (EventHandlerWrapper<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> w: wrappers) { |
| 427 | w.reset(); |
| 428 | } |
| 429 | } finally { |
| 430 | getLock().readLock().unlock(); |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | @Override |
| 435 | public void manageHandlers(HandlerManager<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> handlerManager) { |
| 436 | getLock().writeLock().lock(); |
| 437 | try { |
| 438 | handlerManager.manageHandlers(this); |
| 439 | } finally { |
| 440 | getLock().writeLock().unlock(); |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | @Override |
| 445 | public void setEventBus(EventBus<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S> bus) { |
| 446 | this.eventBus = bus; |
| 447 | } |
| 448 | |
| 449 | private class HandleJoiner extends Joiner<Handle<E,P,C,Long>, CompositeContext<E, P, C, Long, AbstractEventBus.Handle<E, P, C, Long>, S>, Object> { |
| 450 | |
| 451 | Lock lock = new ReentrantLock(); |
| 452 | |
| 453 | private EventHandler<E, P, C, AbstractEventBus.Handle<E, P, C, Long>, S> handler; |
| 454 | private Collector<Handle<E,P,C,Long>>[] ic; |
| 455 | |
| 456 | private Long registrationKey; |
| 457 | |
| 458 | public HandleJoiner( |
| 459 | Collector<Handle<E,P,C,Long>>[] inputCollectors, |
| 460 | Class<Handle<E,P,C,Long>> inputType, |
| 461 | EventHandler<E, P, C, AbstractEventBus.Handle<E, P, C, Long>, S> handler, |
| 462 | Long registrationKey) { |
| 463 | |
| 464 | super(inputCollectors, inputType, false); |
| 465 | this.ic = inputCollectors; |
| 466 | this.handler = handler; |
| 467 | this.registrationKey = registrationKey; |
| 468 | } |
| 469 | |
| 470 | @Override |
| 471 | protected void startJoin() { |
| 472 | // System.out.println("Lock by "+Thread.currentThread()); |
| 473 | lock.lock(); |
| 474 | } |
| 475 | |
| 476 | @Override |
| 477 | protected void endJoin() { |
| 478 | // System.out.println("UnLock by "+Thread.currentThread()); |
| 479 | lock.unlock(); |
| 480 | } |
| 481 | |
| 482 | private AtomicBoolean fired=new AtomicBoolean(false); |
| 483 | |
| 484 | @Override |
| 485 | protected Object join( |
| 486 | final Handle<E,P,C,Long>[] inputs, |
| 487 | final CompositeContext<E,P,C,Long,AbstractEventBus.Handle<E,P,C,Long>,S> context, |
| 488 | final Joiner.InputConsumer consumer, |
| 489 | int activator) throws Exception { |
| 490 | |
| 491 | if (!handler.isOneOff() || !fired.getAndSet(true)) { |
| 492 | final E[] events = (E[]) Array.newInstance(eventBus.getEventType(), inputs.length); |
| 493 | for (int i=0; i<inputs.length; ++i) { |
| 494 | if (inputs[i].isValid()) { |
| 495 | events[i] = inputs[i].getEvent(); |
| 496 | } else { |
| 497 | return null; |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | if (!handler.getPredicate().extract(handler.getContext(), null, events)) { |
| 502 | return null; |
| 503 | } |
| 504 | |
| 505 | if (handler.getMode()==Mode.POST || handler.getMode()==Mode.BOTH) { |
| 506 | LocalEventDispatchContextImpl<E,P,C,S> dispatchContext = new LocalEventDispatchJoinContextImpl<E, P, C, S>( |
| 507 | context.getInferenceContext(), |
| 508 | handler, |
| 509 | registrationKey, |
| 510 | inputs, |
| 511 | events, |
| 512 | (EventDispatchJoinContext<E, P, C, AbstractEventBus.Handle<E,P,C,Long>, S>) context.getEventDispatchContext(), |
| 513 | Mode.POST) { |
| 514 | |
| 515 | @Override |
| 516 | public void consumeJoin(int index) { |
| 517 | consumer.consume(index); |
| 518 | } |
| 519 | |
| 520 | @Override |
| 521 | public void consumeJoin(E event) { |
| 522 | for (int i=0; i<events.length; ++i) { |
| 523 | if (event==events[i]) { |
| 524 | consumeJoin(i); |
| 525 | break; |
| 526 | } |
| 527 | } |
| 528 | } |
| 529 | }; |
| 530 | |
| 531 | LocalEventDispatchContextImpl.threadContext.set(dispatchContext); |
| 532 | try { |
| 533 | if (((LocalEventBusBase<E,P,C,S>) eventBus).isAssertPredicatesBeforePost()) { |
| 534 | if (!handler.getPredicate().extract(handler.getContext(), null, events)) { |
| 535 | throw new EventDispatchException("Handler predicate evaluated to false before post: "+handler.getPredicate()+", handler "+handler); |
| 536 | } |
| 537 | } |
| 538 | handler.post(dispatchContext, events); |
| 539 | } catch (Exception e) { |
| 540 | logger.log(Level.SEVERE, "Exception in event handler: "+e, e); |
| 541 | if (eventBus.getExceptionHandler()!=null) { |
| 542 | eventBus.getExceptionHandler().handleException(e); |
| 543 | } |
| 544 | if (context.getInferenceContext().getRootHandle()!=null) { |
| 545 | context.getInferenceContext().getRootHandle().handleException(e); |
| 546 | } |
| 547 | } finally { |
| 548 | LocalEventDispatchContextImpl.threadContext.set(null); |
| 549 | } |
| 550 | if (handler.isOneOff()) { |
| 551 | ((LocalEventBusBase<E,P,C,S>) eventBus).removeHandlers(registrationKey); |
| 552 | |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | if (handler.getMode()==Mode.REMOVE || handler.getMode()==Mode.BOTH) { |
| 557 | RemoveListener<E,P,C,S> removeListener = new RemoveListener<E, P, C, S>(handler, registrationKey, inputs, eventBus.getEventType()); |
| 558 | for (Handle<E,P,C,Long> handle: inputs) { |
| 559 | ((LocalHandle<E,P,C,S>) handle).addRemoveListener(removeListener); |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | } |
| 564 | return null; |
| 565 | } |
| 566 | |
| 567 | @Override |
| 568 | public String toString() { |
| 569 | return "Simple HandleJoiner [handler=" + handler + ", ic=" + Arrays.toString(ic) + "]"; |
| 570 | }; |
| 571 | |
| 572 | } |
| 573 | |
| 574 | @SuppressWarnings("unchecked") |
| 575 | protected HandleJoiner createJoiner(EventHandler<E, P, C, AbstractEventBus.Handle<E, P, C, Long>, S> eventHandler, Long registrationKey) { |
| 576 | |
| 577 | Collector<Handle<E,P,C,Long>>[] inputCollectors = new Collector[eventHandler.getCardinality()]; |
| 578 | for (int i=0; i<inputCollectors.length; ++i) { |
| 579 | inputCollectors[i] = new Joiner.CollectionAdapter<Handle<E,P,C,Long>>(new ArrayList<Handle<E,P,C,Long>>() /* createCollection()*/) { |
| 580 | |
| 581 | /** |
| 582 | * Override to replace handles with facades of appropriate type. |
| 583 | */ |
| 584 | public boolean add(AbstractEventBus.Handle<E,P,C,Long> handle) { |
| 585 | if (handle instanceof MasterHandle) { |
| 586 | return super.add(new FacadeHandle((MasterHandle) handle, ((LocalEventBusBase<E,P,C,S>) eventBus).getCollectorHandleStrength())); |
| 587 | } else if (handle instanceof FacadeHandle) { |
| 588 | return super.add(new FacadeHandle(((FacadeHandle) handle).getMaster(), ((LocalEventBusBase<E,P,C,S>) eventBus).getCollectorHandleStrength())); |
| 589 | } else { |
| 590 | throw new IllegalArgumentException("Unexpected handle type: "+handle.getClass()); |
| 591 | } |
| 592 | }; |
| 593 | |
| 594 | public boolean remove(AbstractEventBus.Handle<E,P,C,Long> obj) { |
| 595 | // System.out.println("Before remove: "+this); |
| 596 | Iterator<Handle<E, P, C, Long>> it = iterator(); |
| 597 | while (it.hasNext()) { |
| 598 | if (obj.getId().equals(it.next().getId())) { |
| 599 | it.remove(); |
| 600 | return true; |
| 601 | } |
| 602 | } |
| 603 | |
| 604 | return false; |
| 605 | }; |
| 606 | }; |
| 607 | } |
| 608 | Class inputClass = Handle.class; |
| 609 | return new HandleJoiner(inputCollectors, inputClass, eventHandler, registrationKey); |
| 610 | } |
| 611 | |
| 612 | // private Collection<Handle<E, P, C, Long>> createCollection() { |
| 613 | // return InvocationRecordingProxyFactory.wrap(Collection.class, new ArrayList<Handle<E,P,C,Long>>(), new ProblemListener() { |
| 614 | // |
| 615 | // @Override |
| 616 | // public void onProblem(Throwable th, List<InvocationRecord> records) { |
| 617 | // Object[] ra = records.toArray(); |
| 618 | // for (int i=0; i<ra.length; ++i) { |
| 619 | // System.out.println(i+" "+ra[i]); |
| 620 | // } |
| 621 | // |
| 622 | // th.printStackTrace(); |
| 623 | // } |
| 624 | // |
| 625 | // }); |
| 626 | // } |
| 627 | |
| 628 | |
| 629 | } |