GameFramework下载器Download

类图

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DownloadComponent

入口

DownloadManager

下载管理器

TaskPool<DownloadTask>

下载任务池，对任务进行调度

一开始会初始化固定数量的任务执行器

DownloadTask

下载任务，封装任务数据

ITaskAgent<DownloadTask>

下载任务执行器接口

用来执行 DownloadTask

DownloadAgent

下载任务执行器

用来执行 DownloadTask

把执行功能委托给 DownloadAgentHelperBase

DownloadAgentHelperBase

下载器基类

UnityWebRequestDownloadAgentHelper

UnityWebRequest实现的下载器

具体功能委托给 UnityWebRequest

YourDownloadAgentHelper

有需要可以实现你自己的下载器

使用

先在 DownloadComponent 中配置:

Download Agent Helper Count 下载器数量

    public class TestDownload{static int s_downloadId;public static void Test(){Game.Event.Subscribe(DownloadStartEventArgs.EventId, OnDownloadStart);Game.Event.Subscribe(DownloadUpdateEventArgs.EventId, OnDownloadUpdate);Game.Event.Subscribe(DownloadSuccessEventArgs.EventId, OnDownloadSuccess);Game.Event.Subscribe(DownloadFailureEventArgs.EventId, OnDownloadFailure);DownloadComponent downloadComponent = GameEntry.GetComponent<DownloadComponent>();s_downloadId = downloadComponent.AddDownload(Path.Combine(Application.persistentDataPath,"1.txt"), "http://myname.com/data/1.txt", userData: "mydown");  //  userData 可以关联你自己的数据}private static void OnDownloadSuccess(object sender, GameEventArgs e){//  下载成功DownloadSuccessEventArgs args = (DownloadSuccessEventArgs)e;//  有2种方式判断这个下载是不是你要的下载//  1. GameFramework内置方式，通过 SerialId 判断if ( args.SerialId != s_downloadId )return ;//  2. 你在用户数据中传递一个唯一的索引进行判断if ( !(args.UserData is string name && name == "mydown") )return ;}private static void OnDownloadFailure(object sender, GameEventArgs e){DownloadFailureEventArgs args = (DownloadFailureEventArgs)e;//  判断是否你的下载，同 OnDownloadSuccessDebug.Log(args.ErrorMessage);}private static void OnDownloadStart(object sender, GameEventArgs e){DownloadStartEventArgs args = (DownloadStartEventArgs)e;}private static void OnDownloadUpdate(object sender, GameEventArgs e){DownloadUpdateEventArgs args = (DownloadUpdateEventArgs)e;//  一般用来更新进度条，可是 args 只提供 CurrentLength 表示当前大小，没有总大小}}

流程分析

DownloadManager 管理下载，往 TaskPool<DownloadTask> 中添加下载任务 DownloadTask
TaskPool<DownloadTask> 负责找到空闲的下载器 DownloadAgent 来下载 DownloadTask
DownloadAgent 把具体的下载任务委托给  DownloadAgentHelperBase 去下载
UnityWebRequestDownloadAgentHelper 是 DownloadAgentHelperBase 的一个默认实现，把下载任务委托给 UnityWebRequest

下载代码分析

    //  初始化下载器DownlaodComponent.Start(){for (int i = 0; i < m_DownloadAgentHelperCount; i++){AddDownloadAgentHelper(i){//  这里创建的是 UnityWebRequestDownloadAgentHelperDownloadAgentHelperBase downloadAgentHelper = Helper.CreateHelper(m_DownloadAgentHelperTypeName, m_CustomDownloadAgentHelper, index);m_DownloadManager.AddDownloadAgentHelper(downloadAgentHelper)   //  DownloadManager.AddDownloadAgentHelper{DownloadAgent agent = new DownloadAgent(downloadAgentHelper);agent.DownloadAgentStart += OnDownloadAgentStart;agent.DownloadAgentUpdate += OnDownloadAgentUpdate;agent.DownloadAgentSuccess += OnDownloadAgentSuccess;agent.DownloadAgentFailure += OnDownloadAgentFailure;m_TaskPool.AddAgent(agent){agent.Initialize();m_FreeAgents.Push(agent);   //  加入空闲队列中}}}}}//  添加下载任务DownlaodComponent.AddDownload(string downloadPath, string downloadUri){return m_DownloadManager.AddDownload(downloadPath, downloadUri, tag, priority, userData)    //  DownloadManager.AddDownload{DownloadTask downloadTask = DownloadTask.Create(downloadPath, downloadUri, tag, priority, m_FlushSize, m_Timeout, userData);m_TaskPool.AddTask(downloadTask)    //  TaskPool<DownloadTask>.AddTask{m_WaitingTasks.AddAfter(current, task);     //  任务加入等待队列}return downloadTask.SerialId;}}//  执行下载任务DownloadManager.Update(float elapseSeconds, float realElapseSeconds){m_TaskPool.Update(elapseSeconds, realElapseSeconds)     //  TaskPool<DownloadTask>.Update{ProcessRunningTasks(elapseSeconds, realElapseSeconds){DownloadAgent taskAgent = m_WorkingAgents.First;taskAgent.Update(elapseSeconds, realElapseSeconds){//   判断正在下载的任务是否超时}}ProcessWaitingTasks(elapseSeconds, realElapseSeconds)   //  TaskPool<DownloadTask>.ProcessWaitingTasks{LinkedListNode<DownloadTask> current = m_WaitingTasks.First;    //  从等待列表中取出第1个任务DownloadTask task = current.Value; ITaskAgent<DownloadTask> agent = m_FreeAgents.Pop();            //  获得空闲下载任务执行器LinkedListNode<ITaskAgent<DownloadTask>> agentNode = m_WorkingAgents.AddLast(agent);    //  加入执行器列表中StartTaskStatus status = agent.Start(task); //  用执行器下载任务}}}

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5.下载器-Download

GameFramework下载器Download

类图

使用

流程分析

下载代码分析

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