01 /*
02 * Copyright 2008-2015 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 griffon.core.threading;
17
18 import javax.annotation.Nonnull;
19 import javax.annotation.Nullable;
20 import java.util.concurrent.Callable;
21 import java.util.concurrent.ExecutorService;
22 import java.util.concurrent.Future;
23
24 /**
25 * Base contract for classes that can perform tasks in different threads following
26 * the conventions set by the application.
27 *
28 * @author Andres Almiray
29 * @since 2.0.0
30 */
31 public interface ThreadingHandler {
32 /**
33 * True if the current thread is the UI thread.
34 */
35 boolean isUIThread();
36
37 /**
38 * Executes a code block asynchronously on the UI thread.
39 */
40 void runInsideUIAsync(@Nonnull Runnable runnable);
41
42 /**
43 * Executes a code block synchronously on the UI thread.
44 */
45 void runInsideUISync(@Nonnull Runnable runnable);
46
47 /**
48 * Executes a code block outside of the UI thread.
49 */
50 void runOutsideUI(@Nonnull Runnable runnable);
51
52 /**
53 * Executes a code block as a Future on an ExecutorService.
54 */
55 @Nonnull
56 <R> Future<R> runFuture(@Nonnull ExecutorService executorService, @Nonnull Callable<R> callable);
57
58 /**
59 * Executes a code block as a Future on a default ExecutorService.
60 */
61 @Nonnull
62 <R> Future<R> runFuture(@Nonnull Callable<R> callable);
63
64 /**
65 * Executes a code block synchronously on the UI thread.
66 * @since 2.2.0
67 */
68 @Nullable
69 <R> R runInsideUISync(@Nonnull Callable<R> callable);
70 }
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