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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                ## Context 該 Context 翻譯過來就是上下文管理,與 Golang 的 context 功能完全一致,主要作用有兩個: * 控制 goroutine 的取消、超時 * 保存當前請求的上下文數據 框架 HTTP、gRPC、JSON-RPC 的請求參數中都會包含該對象。 ## WithValue 設置、獲取值: ~~~ $ctx = new \Mix\Context\Context(); $ctx->withValue('foo', 'bar'); $value = $ctx->value('foo'); ~~~ ## WithCancel 開啟一個協程消費 `$c1` 通道的消息,當 `$cancelCtx->cancel()` 調用時取消該操作。 ~~~ $c1 = new \Mix\Context\Context(); $ctx = new \Mix\Context\Context(); $cancelCtx = $ctx->withCancel(); xgo(function () use ($c1, $cancelCtx) { while (true) { if (select( select_case(select_pop($c1), function ($value) { var_dump($value); }), select_case(select_pop($cancelCtx->done()), function ($value) { return SELECT_BREAK; }) )->run()->break()) { return; } } }); $cancelCtx->cancel(); ~~~ ## WithTimeout 開啟一個協程消費 `$c1` 通道的消息,當 `$timeoutCtx` 達到超時條件時取消該操作。 ~~~ use Mix\Time\Time; $c1 = new \Mix\Context\Context(); $ctx = new \Mix\Context\Context(); $timeoutCtx = $ctx->withTimeout(3 * Time::SECOND); xgo(function () use ($c1, $timeoutCtx) { while (true) { if (select( select_case(select_pop($c1), function ($value) { var_dump($value); }), select_case(select_pop($timeoutCtx->done()), function ($value) { return SELECT_BREAK; }) )->run()->break()) { return; } } }); ~~~
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