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Extract HandlerThread implementation from Dispatcher (#2401)
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picasso/src/main/java/com/squareup/picasso3/HandlerDispatcher.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,161 @@ | ||
| /* | ||
| * Copyright (C) 2023 Square, Inc. | ||
| * | ||
| * 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.squareup.picasso3 | ||
|
|
||
| import android.content.Context | ||
| import android.net.NetworkInfo | ||
| import android.os.Handler | ||
| import android.os.HandlerThread | ||
| import android.os.Looper | ||
| import android.os.Message | ||
| import android.os.Process.THREAD_PRIORITY_BACKGROUND | ||
| import com.squareup.picasso3.Utils.flushStackLocalLeaks | ||
| import java.util.concurrent.ExecutorService | ||
|
|
||
| internal class HandlerDispatcher internal constructor( | ||
| context: Context, | ||
| service: ExecutorService, | ||
| mainThreadHandler: Handler, | ||
| cache: PlatformLruCache | ||
| ) : Dispatcher(context, service, mainThreadHandler, cache) { | ||
|
|
||
| private val dispatcherThread: DispatcherThread | ||
| private val handler: Handler | ||
|
|
||
| init { | ||
| dispatcherThread = DispatcherThread() | ||
| dispatcherThread.start() | ||
| val dispatcherThreadLooper = dispatcherThread.looper | ||
| flushStackLocalLeaks(dispatcherThreadLooper) | ||
| handler = DispatcherHandler(dispatcherThreadLooper, this) | ||
| } | ||
|
|
||
| override fun shutdown() { | ||
| super.shutdown() | ||
|
|
||
| dispatcherThread.quit() | ||
| } | ||
|
|
||
| override fun dispatchSubmit(action: Action) { | ||
| handler.sendMessage(handler.obtainMessage(REQUEST_SUBMIT, action)) | ||
| } | ||
|
|
||
| override fun dispatchCancel(action: Action) { | ||
| handler.sendMessage(handler.obtainMessage(REQUEST_CANCEL, action)) | ||
| } | ||
|
|
||
| override fun dispatchPauseTag(tag: Any) { | ||
| handler.sendMessage(handler.obtainMessage(TAG_PAUSE, tag)) | ||
| } | ||
|
|
||
| override fun dispatchResumeTag(tag: Any) { | ||
| handler.sendMessage(handler.obtainMessage(TAG_RESUME, tag)) | ||
| } | ||
|
|
||
| override fun dispatchComplete(hunter: BitmapHunter) { | ||
| handler.sendMessage(handler.obtainMessage(HUNTER_COMPLETE, hunter)) | ||
| } | ||
|
|
||
| override fun dispatchRetry(hunter: BitmapHunter) { | ||
| handler.sendMessageDelayed(handler.obtainMessage(HUNTER_RETRY, hunter), RETRY_DELAY) | ||
| } | ||
|
|
||
| override fun dispatchFailed(hunter: BitmapHunter) { | ||
| handler.sendMessage(handler.obtainMessage(HUNTER_DECODE_FAILED, hunter)) | ||
| } | ||
|
|
||
| override fun dispatchNetworkStateChange(info: NetworkInfo) { | ||
| handler.sendMessage(handler.obtainMessage(NETWORK_STATE_CHANGE, info)) | ||
| } | ||
|
|
||
| override fun dispatchAirplaneModeChange(airplaneMode: Boolean) { | ||
| handler.sendMessage( | ||
| handler.obtainMessage( | ||
| AIRPLANE_MODE_CHANGE, | ||
| if (airplaneMode) AIRPLANE_MODE_ON else AIRPLANE_MODE_OFF, | ||
| 0 | ||
| ) | ||
| ) | ||
| } | ||
|
|
||
| private class DispatcherHandler( | ||
| looper: Looper, | ||
| private val dispatcher: Dispatcher | ||
| ) : Handler(looper) { | ||
| override fun handleMessage(msg: Message) { | ||
| when (msg.what) { | ||
| REQUEST_SUBMIT -> { | ||
| val action = msg.obj as Action | ||
| dispatcher.performSubmit(action) | ||
| } | ||
| REQUEST_CANCEL -> { | ||
| val action = msg.obj as Action | ||
| dispatcher.performCancel(action) | ||
| } | ||
| TAG_PAUSE -> { | ||
| val tag = msg.obj | ||
| dispatcher.performPauseTag(tag) | ||
| } | ||
| TAG_RESUME -> { | ||
| val tag = msg.obj | ||
| dispatcher.performResumeTag(tag) | ||
| } | ||
| HUNTER_COMPLETE -> { | ||
| val hunter = msg.obj as BitmapHunter | ||
| dispatcher.performComplete(hunter) | ||
| } | ||
| HUNTER_RETRY -> { | ||
| val hunter = msg.obj as BitmapHunter | ||
| dispatcher.performRetry(hunter) | ||
| } | ||
| HUNTER_DECODE_FAILED -> { | ||
| val hunter = msg.obj as BitmapHunter | ||
| dispatcher.performError(hunter) | ||
| } | ||
| NETWORK_STATE_CHANGE -> { | ||
| val info = msg.obj as NetworkInfo | ||
| dispatcher.performNetworkStateChange(info) | ||
| } | ||
| AIRPLANE_MODE_CHANGE -> { | ||
| dispatcher.performAirplaneModeChange(msg.arg1 == AIRPLANE_MODE_ON) | ||
| } | ||
| else -> { | ||
| Picasso.HANDLER.post { | ||
| throw AssertionError("Unknown handler message received: ${msg.what}") | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| internal class DispatcherThread : HandlerThread( | ||
| Utils.THREAD_PREFIX + DISPATCHER_THREAD_NAME, | ||
| THREAD_PRIORITY_BACKGROUND | ||
| ) | ||
| internal companion object { | ||
| private const val RETRY_DELAY = 500L | ||
| private const val AIRPLANE_MODE_ON = 1 | ||
| private const val AIRPLANE_MODE_OFF = 0 | ||
| private const val REQUEST_SUBMIT = 1 | ||
| private const val REQUEST_CANCEL = 2 | ||
| private const val HUNTER_RETRY = 5 | ||
| private const val HUNTER_DECODE_FAILED = 6 | ||
| private const val AIRPLANE_MODE_CHANGE = 10 | ||
| private const val TAG_PAUSE = 11 | ||
| private const val TAG_RESUME = 12 | ||
| private const val DISPATCHER_THREAD_NAME = "Dispatcher" | ||
| } | ||
| } |
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