01 /*
02 * Copyright 2008-2014 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.threading;
17
18 import griffon.core.ExecutorServiceManager;
19 import griffon.core.GriffonExceptionHandler;
20 import griffon.core.threading.UIThreadManager;
21
22 import javax.annotation.Nonnull;
23 import javax.inject.Inject;
24 import java.util.concurrent.Callable;
25 import java.util.concurrent.ExecutorService;
26 import java.util.concurrent.Executors;
27 import java.util.concurrent.Future;
28
29 import static java.util.Objects.requireNonNull;
30
31 /**
32 * @author Andres Almiray
33 * @since 2.0.0
34 */
35 public abstract class AbstractUIThreadManager implements UIThreadManager {
36 protected static final String ERROR_RUNNABLE_NULL = "Argument 'runnable' must not be bull";
37 protected static final String ERROR_CALLABLE_NULL = "Argument 'callable' must not be null";
38
39 private final ExecutorService defaultExecutorService = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
40 private static final Thread.UncaughtExceptionHandler UNCAUGHT_EXCEPTION_HANDLER = new GriffonExceptionHandler();
41
42 private ExecutorServiceManager executorServiceManager;
43
44 @Inject
45 public void setExecutorServiceManager(@Nonnull ExecutorServiceManager executorServiceManager) {
46 requireNonNull(executorServiceManager, "Argument 'executorServiceManager' must not be bull");
47 if (this.executorServiceManager != null) {
48 this.executorServiceManager.remove(defaultExecutorService);
49 }
50 this.executorServiceManager = executorServiceManager;
51 this.executorServiceManager.add(defaultExecutorService);
52 }
53
54 /**
55 * Executes a code block as a Future on an ExecutorService.
56 *
57 * @param callable a code block to be executed
58 * @return a Future that contains the result of the execution
59 */
60 @Nonnull
61 public <R> Future<R> runFuture(@Nonnull Callable<R> callable) {
62 requireNonNull(callable, ERROR_CALLABLE_NULL);
63 return runFuture(defaultExecutorService, callable);
64 }
65
66 /**
67 * Executes a code block as a Future on an ExecutorService.
68 *
69 * @param executorService the ExecutorService to use. Will use the default ExecutorService if null.
70 * @param callable a code block to be executed
71 * @return a Future that contains the result of the execution
72 */
73 @Nonnull
74 public <R> Future<R> runFuture(@Nonnull ExecutorService executorService, @Nonnull Callable<R> callable) {
75 requireNonNull(executorService, "Argument 'executorService' must not be null");
76 requireNonNull(callable, ERROR_CALLABLE_NULL);
77 return executorService.submit(callable);
78 }
79
80 public void runOutsideUI(@Nonnull final Runnable runnable) {
81 requireNonNull(runnable, ERROR_RUNNABLE_NULL);
82 if (!isUIThread()) {
83 runnable.run();
84 } else {
85 defaultExecutorService.submit(new Runnable() {
86 public void run() {
87 try {
88 runnable.run();
89 } catch (Throwable throwable) {
90 UNCAUGHT_EXCEPTION_HANDLER.uncaughtException(Thread.currentThread(), throwable);
91 }
92 }
93 });
94 }
95 }
96 }
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