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86 lines (76 loc) · 2.34 KB
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/**
* Copyright (C) 2010-2015 eBusiness Information, Excilys Group
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed To in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package org.androidannotations.api;
import java.util.concurrent.ConcurrentHashMap;
import android.os.Handler;
import android.os.Looper;
import android.os.SystemClock;
/**
* This class provide operations for
* {@link org.androidannotations.annotations.UiThread UiThread} tasks.
*/
public class UiThreadExecutor {
private static final Handler HANDLER = new Handler(Looper.getMainLooper());
private static final ConcurrentHashMap<String, Object> TOKENS = new ConcurrentHashMap<String, Object>();
private UiThreadExecutor() {
// should not be instantiated
}
/**
* Store a new task in the map for providing cancellation. This method is
* used by AndroidAnnotations and not intended to be called by clients.
*
* @param id
* the identifier of the task
* @param task
* the task itself
* @param delay
* the delay or zero to run immediately
*/
public static void runTask(String id, Runnable task, long delay) {
if ("".equals(id)) {
HANDLER.postDelayed(task, delay);
return;
}
long time = SystemClock.uptimeMillis() + delay;
HANDLER.postAtTime(task, getToken(id), time);
}
private static Object getToken(String id) {
Object token = TOKENS.get(id);
if (token == null) {
token = new Object();
Object oldObject = TOKENS.putIfAbsent(id, token);
// if a concurrent thread was faster
if (oldObject != null) {
token = oldObject;
}
}
return token;
}
/**
* Cancel all tasks having the specified <code>id</code>.
*
* @param id
* the cancellation identifier
*/
public static void cancelAll(String id) {
Object token = TOKENS.get(id);
if (token == null) {
// nothing to cancel
return;
}
HANDLER.removeCallbacksAndMessages(token);
}
}