47 lines
1.6 KiB
TypeScript
47 lines
1.6 KiB
TypeScript
/*
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Copyright 2022 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import { defer, IDeferred } from "matrix-js-sdk/src/utils";
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import { WorkerPayload } from "./workers/worker";
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export class WorkerManager<Request extends {}, Response> {
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private readonly worker: Worker;
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private seq = 0;
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private pendingDeferredMap = new Map<number, IDeferred<Response>>();
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public constructor(WorkerConstructor: { new (): Worker }) {
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this.worker = new WorkerConstructor();
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this.worker.onmessage = this.onMessage;
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}
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private onMessage = (ev: MessageEvent<Response & WorkerPayload>): void => {
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const deferred = this.pendingDeferredMap.get(ev.data.seq);
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if (deferred) {
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this.pendingDeferredMap.delete(ev.data.seq);
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deferred.resolve(ev.data);
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}
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};
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public call(request: Request): Promise<Response> {
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const seq = this.seq++;
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const deferred = defer<Response>();
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this.pendingDeferredMap.set(seq, deferred);
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this.worker.postMessage({ seq, ...request });
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return deferred.promise;
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}
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}
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