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1 | package ro.ieval.fonbot; | |
2 | ||
3 | import java.util.LinkedList; | |
4 | import java.util.Queue; | |
5 | import java.util.concurrent.Executor; | |
6 | import java.util.concurrent.Executors; | |
7 | ||
8 | /* | |
9 | * Copyright © 2013 Marius Gavrilescu | |
10 | * | |
11 | * This file is part of FonBot. | |
12 | * | |
13 | * FonBot is free software: you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation, either version 3 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * FonBot is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with FonBot. If not, see <http://www.gnu.org/licenses/>. | |
25 | */ | |
26 | ||
27 | /** | |
28 | * Slim alternative to AsyncTask.<p> | |
29 | * | |
30 | * Differences from AsyncTask: | |
31 | * <ul> | |
32 | * <li>No onPreExecute or onPostExecute | |
33 | * <li>No progress support | |
34 | * <li>Can be retried if necessary | |
35 | * </ul> | |
36 | * | |
37 | * @author Marius Gavrilescu <marius@ieval.ro> | |
38 | */ | |
39 | abstract class ExecutableRunnable implements Runnable { | |
40 | /** Executor used to execute instances of this class */ | |
41 | private static final Executor executor = Executors.newSingleThreadExecutor(); | |
42 | /** Queue containing <code>ExecutableRunnable</code>s that should be retried */ | |
43 | private static final Queue<ExecutableRunnable> retryPendingTasks = new LinkedList<ExecutableRunnable>(); | |
44 | ||
45 | /** Run all tasks that should be retried */ | |
46 | public static final void retryTasks(){ | |
47 | synchronized(retryPendingTasks){ | |
48 | for(ExecutableRunnable task : retryPendingTasks) | |
49 | task.execute(); | |
50 | retryPendingTasks.clear(); | |
51 | } | |
52 | } | |
53 | ||
54 | /** Execute this <code>ExecutableRunnable</code> */ | |
55 | public final void execute(){ | |
56 | retryTasks(); | |
57 | executor.execute(this); | |
58 | } | |
59 | ||
60 | /** Mark this <code>ExecutableRunnable</code> as needing to be retried later */ | |
61 | protected final void retry(){ | |
62 | synchronized(retryPendingTasks){ | |
63 | retryPendingTasks.add(this); | |
64 | } | |
65 | } | |
66 | } |