mirror of https://github.com/webpack/webpack.git
80 lines
1.8 KiB
JavaScript
80 lines
1.8 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const { AsyncParallelHook, AsyncSeriesBailHook, SyncHook } = require("tapable");
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/** @typedef {(result: any, callback: (err?: Error) => void) => void} GotHandler */
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const needCalls = (times, callback) => {
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return err => {
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if (--times === 0) {
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return callback(err);
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}
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if (err && times > 0) {
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times = NaN;
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return callback(err);
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}
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};
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};
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class Cache {
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constructor() {
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this.hooks = {
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/** @type {AsyncSeriesBailHook<string, string>} */
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get: new AsyncSeriesBailHook(["identifier", "etag", "gotHandlers"]),
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/** @type {AsyncParallelHook<string, string, any>} */
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store: new AsyncParallelHook(["identifier", "etag", "data"]),
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/** @type {SyncHook} */
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beginIdle: new SyncHook([]),
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/** @type {AsyncParallelHook} */
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endIdle: new AsyncParallelHook([]),
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/** @type {AsyncParallelHook} */
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shutdown: new AsyncParallelHook([])
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};
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}
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get(identifier, etag, callback) {
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const gotHandlers = [];
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this.hooks.get.callAsync(identifier, etag, gotHandlers, (err, result) => {
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if (err) {
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callback(err);
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return;
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}
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if (gotHandlers.length > 1) {
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const innerCallback = needCalls(gotHandlers.length, () =>
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callback(null, result)
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);
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for (const gotHandler of gotHandlers) {
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gotHandler(result, innerCallback);
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}
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} else if (gotHandlers.length === 1) {
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gotHandlers[0](result, () => callback(null, result));
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} else {
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callback(null, result);
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}
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});
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}
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store(identifier, etag, data, callback) {
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this.hooks.store.callAsync(identifier, etag, data, callback);
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}
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beginIdle() {
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this.hooks.beginIdle.call();
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}
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endIdle(callback) {
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this.hooks.endIdle.callAsync(callback);
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}
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shutdown(callback) {
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this.hooks.shutdown.callAsync(callback);
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}
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}
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module.exports = Cache;
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