'use strict';
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const path = require('path');
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const ms = require('ms');
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const EggApplication = require('./egg');
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const AgentWorkerLoader = require('./loader').AgentWorkerLoader;
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const EGG_LOADER = Symbol.for('egg#loader');
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const EGG_PATH = Symbol.for('egg#eggPath');
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/**
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* Singleton instance in Agent Worker, extend {@link EggApplication}
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* @extends EggApplication
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*/
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class Agent extends EggApplication {
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/**
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* @class
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* @param {Object} options - see {@link EggApplication}
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*/
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constructor(options = {}) {
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options.type = 'agent';
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super(options);
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this.loader.load();
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// dump config after loaded, ensure all the dynamic modifications will be recorded
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const dumpStartTime = Date.now();
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this.dumpConfig();
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this.coreLogger.info('[egg:core] dump config after load, %s', ms(Date.now() - dumpStartTime));
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// keep agent alive even it doesn't have any io tasks
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setInterval(() => {}, 24 * 60 * 60 * 1000);
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this._uncaughtExceptionHandler = this._uncaughtExceptionHandler.bind(this);
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process.on('uncaughtException', this._uncaughtExceptionHandler);
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}
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_uncaughtExceptionHandler(err) {
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if (!(err instanceof Error)) {
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err = new Error(String(err));
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}
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/* istanbul ignore else */
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if (err.name === 'Error') {
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err.name = 'unhandledExceptionError';
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}
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this.coreLogger.error(err);
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}
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get [EGG_LOADER]() {
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return AgentWorkerLoader;
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}
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get [EGG_PATH]() {
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return path.join(__dirname, '..');
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}
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_wrapMessenger() {
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for (const methodName of [ 'broadcast', 'sendTo', 'sendToApp', 'sendToAgent', 'sendRandom' ]) {
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wrapMethod(methodName, this.messenger, this.coreLogger);
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}
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function wrapMethod(methodName, messenger, logger) {
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const originMethod = messenger[methodName];
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messenger[methodName] = function() {
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const stack = new Error().stack.split('\n').slice(1).join('\n');
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logger.warn('agent can\'t call %s before server started\n%s',
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methodName, stack);
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originMethod.apply(this, arguments);
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};
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messenger.prependOnceListener('egg-ready', () => {
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messenger[methodName] = originMethod;
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});
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}
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}
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close() {
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process.removeListener('uncaughtException', this._uncaughtExceptionHandler);
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return super.close();
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}
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}
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module.exports = Agent;
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