| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * 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 com.android.systemui.util.concurrency; |
| |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| |
| import java.util.concurrent.RejectedExecutionException; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Implementations of {@link DelayableExecutor} for SystemUI. |
| */ |
| public class ExecutorImpl implements DelayableExecutor { |
| private final Handler mHandler; |
| |
| ExecutorImpl(Looper looper) { |
| mHandler = new Handler(looper, this::onHandleMessage); |
| } |
| |
| @Override |
| public void execute(Runnable command) { |
| if (!mHandler.post(command)) { |
| throw new RejectedExecutionException(mHandler + " is shutting down"); |
| } |
| } |
| |
| @Override |
| public Runnable executeDelayed(Runnable r, long delay, TimeUnit unit) { |
| ExecutionToken token = new ExecutionToken(r); |
| Message m = mHandler.obtainMessage(MSG_EXECUTE_RUNNABLE, token); |
| mHandler.sendMessageDelayed(m, unit.toMillis(delay)); |
| |
| return token; |
| } |
| |
| @Override |
| public Runnable executeAtTime(Runnable r, long uptimeMillis, TimeUnit unit) { |
| ExecutionToken token = new ExecutionToken(r); |
| Message m = mHandler.obtainMessage(MSG_EXECUTE_RUNNABLE, token); |
| mHandler.sendMessageAtTime(m, unit.toMillis(uptimeMillis)); |
| |
| return token; |
| } |
| |
| private boolean onHandleMessage(Message msg) { |
| if (msg.what == MSG_EXECUTE_RUNNABLE) { |
| ExecutionToken token = (ExecutionToken) msg.obj; |
| token.runnable.run(); |
| } else { |
| throw new IllegalStateException("Unrecognized message: " + msg.what); |
| } |
| return true; |
| } |
| |
| private class ExecutionToken implements Runnable { |
| public final Runnable runnable; |
| |
| private ExecutionToken(Runnable runnable) { |
| this.runnable = runnable; |
| } |
| |
| @Override |
| public void run() { |
| mHandler.removeCallbacksAndMessages(this); |
| } |
| } |
| |
| private static final int MSG_EXECUTE_RUNNABLE = 0; |
| } |