acelga-bus
Version:
An extensible typescript message bus with support for middlewares
55 lines • 2.18 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
const executor_1 = require("./executor");
class Dispatcher {
constructor() {
this.subscriptions = new Map();
this.globalSubscriptions = new Set();
}
on(eventType, callback) {
let callbacksSet = this.subscriptions.get(eventType);
if (!callbacksSet)
callbacksSet = new Set();
callbacksSet.add(callback);
this.subscriptions.set(eventType, callbacksSet);
}
onAny(callback) {
this.globalSubscriptions.add(callback);
}
trigger(event) {
return __awaiter(this, void 0, void 0, function* () {
if (!event)
return;
const callbacks = this.subscriptions.get(event.constructor);
const future = [];
if (callbacks) {
future.push(new executor_1.Executor(event, ...callbacks));
}
if (this.globalSubscriptions.size) {
future.push(new executor_1.Executor(event, ...this.globalSubscriptions));
}
return Promise.all(future.map(executor => executor.execStopOnFail()))
.then(() => { });
});
}
off(eventType, callback) {
if (!callback) {
this.subscriptions.delete(eventType);
return;
}
const callbacks = this.subscriptions.get(eventType);
if (!callbacks)
return;
callbacks.delete(callback);
}
}
exports.Dispatcher = Dispatcher;
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