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cce18e3504
This extends the scope of the cache and fetch instrumentation using AsyncLocalStorage for microtasks. This is an intermediate step. It sets up the dispatcher only once. This is unique to RSC because it uses the react.shared-subset module for its shared state. Ideally we should support multiple renderers. We should also have this take over from an outer SSR's instrumented fetch. We should also be able to have a fallback to global state per request where AsyncLocalStorage doesn't exist and then the whole client-side solutions. I'm still figuring out the right wiring for that so this is a temporary hack.
61 lines
1.5 KiB
JavaScript
61 lines
1.5 KiB
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow
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*/
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export interface Destination {
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push(chunk: string | null): boolean;
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destroy(error: Error): mixed;
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}
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export opaque type PrecomputedChunk = string;
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export opaque type Chunk = string;
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export function scheduleWork(callback: () => void) {
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callback();
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}
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export function flushBuffered(destination: Destination) {}
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export const supportsRequestStorage = false;
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export const requestStorage: AsyncLocalStorage<any> = (null: any);
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export function beginWriting(destination: Destination) {}
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export function writeChunk(
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destination: Destination,
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chunk: Chunk | PrecomputedChunk,
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): void {
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writeChunkAndReturn(destination, chunk);
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}
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export function writeChunkAndReturn(
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destination: Destination,
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chunk: Chunk | PrecomputedChunk,
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): boolean {
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return destination.push(chunk);
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}
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export function completeWriting(destination: Destination) {}
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export function close(destination: Destination) {
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destination.push(null);
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}
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export function stringToChunk(content: string): Chunk {
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return content;
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}
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export function stringToPrecomputedChunk(content: string): PrecomputedChunk {
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return content;
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}
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export function closeWithError(destination: Destination, error: mixed): void {
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// $FlowFixMe: This is an Error object or the destination accepts other types.
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destination.destroy(error);
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}
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