| /* |
| * 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.content.Context; |
| import android.os.Handler; |
| import android.os.HandlerThread; |
| import android.os.Looper; |
| import android.os.Process; |
| |
| import com.android.systemui.dagger.qualifiers.Background; |
| import com.android.systemui.dagger.qualifiers.Main; |
| import com.android.systemui.dagger.qualifiers.UiBackground; |
| |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.Executors; |
| |
| import javax.inject.Singleton; |
| |
| import dagger.Module; |
| import dagger.Provides; |
| |
| /** |
| * Dagger Module for classes found within the concurrent package. |
| */ |
| @Module |
| public abstract class ConcurrencyModule { |
| /** Background Looper */ |
| @Provides |
| @Singleton |
| @Background |
| public static Looper provideBgLooper() { |
| HandlerThread thread = new HandlerThread("SysUiBg", |
| Process.THREAD_PRIORITY_BACKGROUND); |
| thread.start(); |
| return thread.getLooper(); |
| } |
| |
| /** Main Looper */ |
| @Provides |
| @Main |
| public static Looper provideMainLooper() { |
| return Looper.getMainLooper(); |
| } |
| |
| /** |
| * Background Handler. |
| * |
| * Prefer the Background Executor when possible. |
| */ |
| @Provides |
| @Background |
| public static Handler provideBgHandler(@Background Looper bgLooper) { |
| return new Handler(bgLooper); |
| } |
| |
| /** |
| * Main Handler. |
| * |
| * Prefer the Main Executor when possible. |
| */ |
| @Provides |
| @Main |
| public static Handler provideMainHandler(@Main Looper mainLooper) { |
| return new Handler(mainLooper); |
| } |
| |
| /** |
| * Provide a Background-Thread Executor by default. |
| */ |
| @Provides |
| public static Executor provideExecutor(@Background Looper looper) { |
| return new ExecutorImpl(new Handler(looper)); |
| } |
| |
| /** |
| * Provide a Background-Thread Executor. |
| */ |
| @Provides |
| @Background |
| public static Executor provideBackgroundExecutor(@Background Looper looper) { |
| return new ExecutorImpl(new Handler(looper)); |
| } |
| |
| /** |
| * Provide a Main-Thread Executor. |
| */ |
| @Provides |
| @Main |
| public static Executor provideMainExecutor(Context context) { |
| return context.getMainExecutor(); |
| } |
| |
| /** |
| * Provide a Background-Thread Executor by default. |
| */ |
| @Provides |
| public static DelayableExecutor provideDelayableExecutor(@Background Looper looper) { |
| return new ExecutorImpl(new Handler(looper)); |
| } |
| |
| /** |
| * Provide a Background-Thread Executor. |
| */ |
| @Provides |
| @Background |
| public static DelayableExecutor provideBackgroundDelayableExecutor(@Background Looper looper) { |
| return new ExecutorImpl(new Handler(looper)); |
| } |
| |
| /** |
| * Provide a Main-Thread Executor. |
| */ |
| @Provides |
| @Main |
| public static DelayableExecutor provideMainDelayableExecutor(@Main Looper looper) { |
| return new ExecutorImpl(new Handler(looper)); |
| } |
| |
| /** |
| * Provide an Executor specifically for running UI operations on a separate thread. |
| * |
| * Keep submitted runnables short and to the point, just as with any other UI code. |
| */ |
| @Provides |
| @Singleton |
| @UiBackground |
| public static Executor provideUiBackgroundExecutor() { |
| return Executors.newSingleThreadExecutor(); |
| } |
| } |