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Sep 17, 2020
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Update 24-Concurrent-Programming.md #585

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Expand Up @@ -1550,7 +1550,7 @@ Machina0: complete

这种“立即返回”的异步能力需要 `CompletableFuture` 库进行一些秘密（`client` 无感）工作。特别是，它将你需要的操作链存储为一组回调。当操作的第一个链路（后台操作）完成并返回时，第二个链路（后台操作）必须获取生成的 `Machina` 并开始工作，以此类推！ 但这种异步机制没有我们可以通过程序调用栈控制的普通函数调用序列，它的调用链路顺序会丢失，因此它使用一个函数地址来存储的回调来解决这个问题。

幸运的是，这就是你需要了解的有关回调的全部信息。程序员将这种人为制造的混乱称为 callback hell(回调地狱)。通过异步调用，`CompletableFuture` 帮你管理所有回调。 除非你知道系统的一些具体的变化，否则你更想使用异步调用来实现程序。
幸运的是，这就是你需要了解的有关回调的全部信息。程序员将这种人为制造的混乱称为 callback hell（回调地狱）。通过异步调用，`CompletableFuture` 帮你管理所有回调。 除非你知道你系统中的一些特定逻辑会导致某些改变，或许你更想使用异步调用来实现程序。

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