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| 1 /* | |
| 2 * Copyright 2015 The WebRTC Project Authors. All rights reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 package org.appspot.apprtc.util; | |
| 12 | |
| 13 import android.os.Handler; | |
| 14 import android.os.Looper; | |
| 15 import android.util.Log; | |
| 16 | |
| 17 import java.util.LinkedList; | |
| 18 import java.util.List; | |
| 19 import java.util.concurrent.Executor; | |
| 20 | |
| 21 /** | |
| 22 * Looper based executor class. This is needed because WebSocketClient from auto
banh requires the | |
| 23 * thread to have a looper. The class is used in WebSocketRTCClient/WebSocketCha
nnelClient. | |
| 24 */ | |
| 25 public class LooperExecutor extends Thread implements Executor { | |
| 26 private static final String TAG = "LooperExecutor"; | |
| 27 // Object used to signal that looper thread has started and Handler instance | |
| 28 // associated with looper thread has been allocated. | |
| 29 private final Object looperStartedEvent = new Object(); | |
| 30 private final List<Runnable> scheduledPeriodicRunnables = new LinkedList<Runna
ble>(); | |
| 31 private Handler handler = null; | |
| 32 private boolean running = false; | |
| 33 private long threadId; | |
| 34 | |
| 35 @Override | |
| 36 public void run() { | |
| 37 Looper.prepare(); | |
| 38 synchronized (looperStartedEvent) { | |
| 39 Log.d(TAG, "Looper thread started."); | |
| 40 handler = new Handler(); | |
| 41 threadId = Thread.currentThread().getId(); | |
| 42 looperStartedEvent.notify(); | |
| 43 } | |
| 44 Looper.loop(); | |
| 45 } | |
| 46 | |
| 47 public synchronized void requestStart() { | |
| 48 if (running) { | |
| 49 return; | |
| 50 } | |
| 51 running = true; | |
| 52 handler = null; | |
| 53 start(); | |
| 54 // Wait for Hander allocation. | |
| 55 synchronized (looperStartedEvent) { | |
| 56 while (handler == null) { | |
| 57 try { | |
| 58 looperStartedEvent.wait(); | |
| 59 } catch (InterruptedException e) { | |
| 60 Log.e(TAG, "Can not start looper thread"); | |
| 61 running = false; | |
| 62 } | |
| 63 } | |
| 64 } | |
| 65 } | |
| 66 | |
| 67 public synchronized void requestStop() { | |
| 68 if (!running) { | |
| 69 return; | |
| 70 } | |
| 71 running = false; | |
| 72 handler.post(new Runnable() { | |
| 73 @Override | |
| 74 public void run() { | |
| 75 handler.getLooper().quit(); | |
| 76 Log.d(TAG, "Looper thread finished."); | |
| 77 } | |
| 78 }); | |
| 79 } | |
| 80 | |
| 81 // Checks if current thread is a looper thread. | |
| 82 public boolean checkOnLooperThread() { | |
| 83 return (Thread.currentThread().getId() == threadId); | |
| 84 } | |
| 85 | |
| 86 public synchronized void scheduleAtFixedRate(final Runnable command, final lon
g periodMillis) { | |
| 87 if (!running) { | |
| 88 Log.w(TAG, "Trying to schedule task for non running executor"); | |
| 89 return; | |
| 90 } | |
| 91 Runnable runnable = new Runnable() { | |
| 92 @Override | |
| 93 public void run() { | |
| 94 if (running) { | |
| 95 command.run(); | |
| 96 if (!handler.postDelayed(this, periodMillis)) { | |
| 97 Log.e(TAG, "Failed to post a delayed runnable in the chain."); | |
| 98 } | |
| 99 } | |
| 100 } | |
| 101 }; | |
| 102 scheduledPeriodicRunnables.add(runnable); | |
| 103 if (!handler.postDelayed(runnable, periodMillis)) { | |
| 104 Log.e(TAG, "Failed to post a delayed runnable."); | |
| 105 } | |
| 106 } | |
| 107 | |
| 108 public synchronized void cancelScheduledTasks() { | |
| 109 if (!running) { | |
| 110 Log.w(TAG, "Trying to cancel schedule tasks for non running executor"); | |
| 111 return; | |
| 112 } | |
| 113 | |
| 114 // Stop scheduled periodic tasks. | |
| 115 for (Runnable r : scheduledPeriodicRunnables) { | |
| 116 handler.removeCallbacks(r); | |
| 117 } | |
| 118 scheduledPeriodicRunnables.clear(); | |
| 119 } | |
| 120 | |
| 121 @Override | |
| 122 public synchronized void execute(final Runnable runnable) { | |
| 123 if (!running) { | |
| 124 Log.w(TAG, "Running looper executor without calling requestStart()"); | |
| 125 return; | |
| 126 } | |
| 127 if (Thread.currentThread().getId() == threadId) { | |
| 128 runnable.run(); | |
| 129 } else { | |
| 130 handler.post(runnable); | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 /** | |
| 135 * Access to the handler for testing purposes. | |
| 136 */ | |
| 137 Handler getHandler() { | |
| 138 return handler; | |
| 139 } | |
| 140 } | |
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Chromium Code Reviews
Issue 2206473003:
Remove LooperExecutor and replace it with built-in HandlerThread. (Closed)
Base URL: https://chromium.googlesource.com/external/webrtc.git@master