队列结构
2017-12-07 13:19:21 0 举报下载队列结构
作者其他创作
大纲/内容
remove from wating queue and add to donwloading queue
Operation
fail
Operation：pause
remove from downloading queue
Operation：wating
Operation：waiting
Operation：downloading
...
remove from downloading queue and add to waiting queue
Operation：fail
finish download
Wating Queue
Max downloading operation count: 3
Downloading Queue
Add to wating queue
Downloading Queue Protocol：串行异步
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