81 lines
2.2 KiB
JavaScript
81 lines
2.2 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.PortTransport = void 0;
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/**
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* Copyright (c) Microsoft Corporation.
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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class PortTransport {
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constructor(port, handler) {
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this._lastId = 0;
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this._port = void 0;
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this._callbacks = new Map();
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this._port = port;
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port.addEventListener('message', async event => {
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const message = event.data;
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const {
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id,
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ackId,
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method,
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params,
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result
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} = message;
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if (id) {
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const result = await handler(method, params);
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this._port.postMessage({
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ackId: id,
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result
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});
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return;
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}
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if (ackId) {
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const callback = this._callbacks.get(ackId);
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this._callbacks.delete(ackId);
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this._resetRef();
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callback === null || callback === void 0 || callback(result);
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return;
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}
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});
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// Make sure to unref **after** adding a 'message' event listener.
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// https://nodejs.org/api/worker_threads.html#portref
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this._resetRef();
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}
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async send(method, params) {
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return await new Promise(f => {
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const id = ++this._lastId;
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this._callbacks.set(id, f);
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this._resetRef();
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this._port.postMessage({
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id,
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method,
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params
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});
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});
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}
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_resetRef() {
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if (this._callbacks.size) {
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// When we are waiting for a response, ref the port to prevent this process from exiting.
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this._port.ref();
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} else {
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// When we are not waiting for a response, unref the port to prevent this process
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// from hanging forever.
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this._port.unref();
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}
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}
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}
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exports.PortTransport = PortTransport; |