01 /*
02 * Copyright 2008-2016 the original author or authors.
03 *
04 * Licensed under the Apache License, Version 2.0 (the "License");
05 * you may not use this file except in compliance with the License.
06 * You may obtain a copy of the License at
07 *
08 * http://www.apache.org/licenses/LICENSE-2.0
09 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.codehaus.griffon.runtime.core.event;
17
18 import griffon.core.threading.UIThreadManager;
19
20 import javax.annotation.Nonnull;
21 import javax.inject.Inject;
22 import java.util.concurrent.BlockingQueue;
23 import java.util.concurrent.LinkedBlockingQueue;
24
25 import static java.util.Objects.requireNonNull;
26
27 /**
28 * @author Andres Almiray
29 */
30 public class DefaultEventRouter extends AbstractEventRouter {
31 private final BlockingQueue<Runnable> deferredEvents = new LinkedBlockingQueue<>();
32 private static final String ERROR_PUBLISHER_NULL = "Argument 'publisher' must not be null";
33 private UIThreadManager uiThreadManager;
34
35 public DefaultEventRouter() {
36 Thread t = new Thread(new Runnable() {
37 public void run() {
38 //noinspection InfiniteLoopStatement
39 while (true) {
40 try {
41 executorService.submit(deferredEvents.take());
42 } catch (InterruptedException e) {
43 // ignore ?
44 }
45 }
46 }
47 }, "event-router-queue-" + eventRouterId);
48 t.setDaemon(true);
49 t.start();
50 }
51
52 @Inject
53 public void setUIThreadManager(@Nonnull UIThreadManager uiThreadManager) {
54 this.uiThreadManager = requireNonNull(uiThreadManager, "Argument 'uiThreadManager' must not be null");
55 }
56
57 protected void doPublishOutsideUI(@Nonnull Runnable publisher) {
58 requireNonNull(publisher, ERROR_PUBLISHER_NULL);
59 if (!uiThreadManager.isUIThread()) {
60 publisher.run();
61 } else {
62 runInsideExecutorService(publisher);
63 }
64 }
65
66 protected void doPublishAsync(@Nonnull Runnable publisher) {
67 deferredEvents.offer(publisher);
68 }
69 }
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