From: Marius Gavrilescu <marius@ieval.ro>
Date: Tue, 12 Mar 2013 16:16:34 +0000 (+0200)
Subject: Add ExecutableRunnable
X-Git-Tag: 0.000_001~56
X-Git-Url: http://git.ieval.ro/?a=commitdiff_plain;h=bf70dcc30a9bd5cbcd71aa8481f7171331f9f1b6;p=fonbot.git

Add ExecutableRunnable

ExecutableRunnable is a lightweight replacement for AsyncTask.

It does not support onPreExecute()/onPostExecute() or showing progress,
but it can be ran multiple times and retried if it fails.
---

diff --git a/src/ro/ieval/fonbot/ExecutableRunnable.java b/src/ro/ieval/fonbot/ExecutableRunnable.java
new file mode 100644
index 0000000..642661b
--- /dev/null
+++ b/src/ro/ieval/fonbot/ExecutableRunnable.java
@@ -0,0 +1,66 @@
+package ro.ieval.fonbot;
+
+import java.util.LinkedList;
+import java.util.Queue;
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+
+/*
+ * Copyright © 2013 Marius Gavrilescu
+ * 
+ * This file is part of FonBot.
+ *
+ * FonBot is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * FonBot is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with FonBot.  If not, see <http://www.gnu.org/licenses/>. 
+ */
+
+/**
+ * Slim alternative to AsyncTask.<p>
+ *
+ * Differences from AsyncTask:
+ * <ul>
+ * <li>No onPreExecute or onPostExecute
+ * <li>No progress support
+ * <li>Can be retried if necessary
+ * </ul>
+ * 
+ * @author Marius Gavrilescu <marius@ieval.ro>
+ */
+abstract class ExecutableRunnable implements Runnable {
+	/** Executor used to execute instances of this class */
+	private static final Executor executor = Executors.newSingleThreadExecutor();
+	/** Queue containing <code>ExecutableRunnable</code>s that should be retried */
+	private static final Queue<ExecutableRunnable> retryPendingTasks = new LinkedList<ExecutableRunnable>();
+
+	/** Run all tasks that should be retried */
+	public static final void retryTasks(){
+		synchronized(retryPendingTasks){
+			for(ExecutableRunnable task : retryPendingTasks)
+				task.execute();
+			retryPendingTasks.clear();
+		}
+	}
+
+	/** Execute this <code>ExecutableRunnable</code> */
+	public final void execute(){
+		retryTasks();
+		executor.execute(this);
+	}
+
+	/** Mark this <code>ExecutableRunnable</code> as needing to be retried later */
+	protected final void retry(){
+		synchronized(retryPendingTasks){
+			retryPendingTasks.add(this);
+		}
+	}
+}