mirror of
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17c6406e6c
This adds a firefox-stable application to build on our bots. This is basically a rebaselined version of66541552d0
The firefox base revision isbb9bf7e886
Which is taken from `about://buildconfig` of a stable Firefox version on Mac as of Apr 9, 2021. References #5993
181 lines
6.2 KiB
JavaScript
181 lines
6.2 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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// Note: this file should be loadabale with eval() into worker environment.
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// Avoid Components.*, ChromeUtils and global const variables.
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const SIMPLE_CHANNEL_MESSAGE_NAME = 'juggler:simplechannel';
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class SimpleChannel {
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static createForMessageManager(name, mm) {
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const channel = new SimpleChannel(name);
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const messageListener = {
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receiveMessage: message => channel._onMessage(message.data)
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};
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mm.addMessageListener(SIMPLE_CHANNEL_MESSAGE_NAME, messageListener);
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channel.setTransport({
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sendMessage: obj => mm.sendAsyncMessage(SIMPLE_CHANNEL_MESSAGE_NAME, obj),
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dispose: () => mm.removeMessageListener(SIMPLE_CHANNEL_MESSAGE_NAME, messageListener),
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});
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return channel;
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}
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constructor(name) {
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this._name = name;
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this._messageId = 0;
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this._connectorId = 0;
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this._pendingMessages = new Map();
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this._handlers = new Map();
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this._bufferedIncomingMessages = [];
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this._bufferedOutgoingMessages = [];
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this.transport = {
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sendMessage: null,
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dispose: null,
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};
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this._ready = false;
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this._disposed = false;
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}
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setTransport(transport) {
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this.transport = transport;
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// connection handshake:
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// 1. There are two channel ends in different processes.
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// 2. Both ends start in the `ready = false` state, meaning that they will
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// not send any messages over transport.
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// 3. Once channel end is created, it sends `READY` message to the other end.
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// 4. Eventually, at least one of the ends receives `READY` message and responds with
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// `READY_ACK`. We assume at least one of the ends will receive "READY" event from the other, since
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// channel ends have a "parent-child" relation, i.e. one end is always created before the other one.
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// 5. Once channel end receives either `READY` or `READY_ACK`, it transitions to `ready` state.
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this.transport.sendMessage('READY');
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}
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_markAsReady() {
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if (this._ready)
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return;
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this._ready = true;
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for (const msg of this._bufferedOutgoingMessages)
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this.transport.sendMessage(msg);
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this._bufferedOutgoingMessages = [];
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}
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dispose() {
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if (this._disposed)
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return;
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this._disposed = true;
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for (const {resolve, reject, methodName} of this._pendingMessages.values())
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reject(new Error(`Failed "${methodName}": ${this._name} is disposed.`));
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this._pendingMessages.clear();
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this._handlers.clear();
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this.transport.dispose();
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}
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_rejectCallbacksFromConnector(connectorId) {
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for (const [messageId, callback] of this._pendingMessages) {
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if (callback.connectorId === connectorId) {
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callback.reject(new Error(`Failed "${callback.methodName}": connector for namespace "${callback.namespace}" in channel "${this._name}" is disposed.`));
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this._pendingMessages.delete(messageId);
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}
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}
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}
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connect(namespace) {
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const connectorId = ++this._connectorId;
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return {
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send: (...args) => this._send(namespace, connectorId, ...args),
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emit: (...args) => void this._send(namespace, connectorId, ...args).catch(e => {}),
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dispose: () => this._rejectCallbacksFromConnector(connectorId),
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};
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}
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register(namespace, handler) {
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if (this._handlers.has(namespace))
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throw new Error('ERROR: double-register for namespace ' + namespace);
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this._handlers.set(namespace, handler);
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// Try to re-deliver all pending messages.
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const bufferedRequests = this._bufferedIncomingMessages;
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this._bufferedIncomingMessages = [];
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for (const data of bufferedRequests) {
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this._onMessage(data);
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}
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return () => this.unregister(namespace);
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}
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unregister(namespace) {
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this._handlers.delete(namespace);
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}
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/**
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* @param {string} namespace
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* @param {number} connectorId
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* @param {string} methodName
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* @param {...*} params
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* @return {!Promise<*>}
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*/
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async _send(namespace, connectorId, methodName, ...params) {
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if (this._disposed)
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throw new Error(`ERROR: channel ${this._name} is already disposed! Cannot send "${methodName}" to "${namespace}"`);
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const id = ++this._messageId;
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const promise = new Promise((resolve, reject) => {
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this._pendingMessages.set(id, {connectorId, resolve, reject, methodName, namespace});
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});
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const message = {requestId: id, methodName, params, namespace};
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if (this._ready)
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this.transport.sendMessage(message);
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else
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this._bufferedOutgoingMessages.push(message);
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return promise;
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}
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async _onMessage(data) {
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if (data === 'READY') {
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this.transport.sendMessage('READY_ACK');
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this._markAsReady();
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return;
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}
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if (data === 'READY_ACK') {
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this._markAsReady();
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return;
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}
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if (data.responseId) {
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const {resolve, reject} = this._pendingMessages.get(data.responseId);
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this._pendingMessages.delete(data.responseId);
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if (data.error)
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reject(new Error(data.error));
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else
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resolve(data.result);
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} else if (data.requestId) {
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const namespace = data.namespace;
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const handler = this._handlers.get(namespace);
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if (!handler) {
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this._bufferedIncomingMessages.push(data);
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return;
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}
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const method = handler[data.methodName];
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if (!method) {
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this.transport.sendMessage({responseId: data.requestId, error: `error in channel "${this._name}": No method "${data.methodName}" in namespace "${namespace}"`});
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return;
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}
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try {
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const result = await method.call(handler, ...data.params);
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this.transport.sendMessage({responseId: data.requestId, result});
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} catch (error) {
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this.transport.sendMessage({responseId: data.requestId, error: `error in channel "${this._name}": exception while running method "${data.methodName}" in namespace "${namespace}": ${error.message} ${error.stack}`});
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return;
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}
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} else {
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dump(`
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ERROR: unknown message in channel "${this._name}": ${JSON.stringify(data)}
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`);
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}
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}
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}
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var EXPORTED_SYMBOLS = ['SimpleChannel'];
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this.SimpleChannel = SimpleChannel;
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