@tmorin/ceb-messaging-simple
Version:
The package is part of the `<ceb/>` library. It provides an implementation of the messaging model leveraging on a vanilla TypeScript/JavaScript environment.
69 lines • 2.9 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.SimpleEventBus = exports.SimpleEventBusSymbol = void 0;
/**
* The symbol used to register {@link SimpleEventBus}.
*/
exports.SimpleEventBusSymbol = Symbol.for("ceb/inversion/SimpleEventBus");
class SimpleEventBus {
constructor(emitter, listeners = new Map()) {
this.emitter = emitter;
this.listeners = listeners;
}
get observe() {
return this.emitter;
}
publish(...events) {
events.forEach((event) => {
var _a;
this.emitter.emit("event_received", {
bus: this,
event,
});
(_a = this.listeners.get(event.headers.messageType)) === null || _a === void 0 ? void 0 : _a.forEach((listener) => {
Promise.resolve((() => __awaiter(this, void 0, void 0, function* () { return listener(event); }))()).catch((error) => this.emitter.emit("event_listener_failed", {
bus: this,
event,
error,
}));
});
});
}
subscribe(eventType, listener, options) {
var _a;
if (!this.listeners.has(eventType)) {
this.listeners.set(eventType, new Set());
}
const listenerWrapper = (event) => {
var _a;
if (options === null || options === void 0 ? void 0 : options.once) {
(_a = this.listeners.get(eventType)) === null || _a === void 0 ? void 0 : _a.delete(listenerWrapper);
}
return listener(event);
};
(_a = this.listeners.get(eventType)) === null || _a === void 0 ? void 0 : _a.add(listenerWrapper);
return {
remove: () => {
var _a;
(_a = this.listeners.get(eventType)) === null || _a === void 0 ? void 0 : _a.delete(listenerWrapper);
},
};
}
dispose() {
return __awaiter(this, void 0, void 0, function* () {
this.listeners.clear();
this.emitter.emit("disposed", { bus: this });
});
}
}
exports.SimpleEventBus = SimpleEventBus;
//# sourceMappingURL=event.js.map