Allow threading for sync `use_effect` calls

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#1,136 创建于 2023年8月28日 0 条评论 0 个 reaction 已指派 0 人在 GitHub 查看

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评估

难度: 5/5
预计耗时: 一周以上
新手友好度: 35/100

Issue 类型: 功能
描述清晰度: 基本清楚
活跃度: 停滞
技术栈: python
领域: backend

调研方向

Start by tracing how sync use_effect calls are handled alongside the ASGI websocket consumer and document the current main-thread behavior. Define whether the default should serialize effects through a single worker, how the proposed threading parameter restores legacy behavior, and whether configurable worker counts are in scope; done requires an agreed design and corresponding coverage.

由索引模型根据 Issue 内容生成。

描述

priority-2-moderate

Current Situation

Users frequently run into unexpected webserver "freezing" when using sync effects due to Python's single-threaded nature. This is seemingly caused by the ASGI websocket consumer being blocked from receiving/sending data during hook operations. This behavior doesn't seem to match up with equivalent JavaScript server side frameworks.

Proposed Actions

By default we should run all sync effects in a ThreadPoolExecutor(max_workers=1). This effectively runs all sync effects in a background thread. Additionally, by running all effects in the same worker thread (max_workers=1) this implementation is semi-threadsafe (as long as the user didn't start an operation outside of his use_effect call (which they shouldn't have under React-style programming). For operations that must run on the main thread, we need a @use_effect(threading: bool = ...) parameter to switch back to legacy behavior.

We could also consider a reactpy.config.USE_EFFECT_WORKERS=... setting to allow users to modify the value of max_workers.

主要语言: Python
星标: 8.1k
派生: 332
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