n8n
Version:
n8n Workflow Automation Tool
98 lines • 3.96 kB
JavaScript
"use strict";
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.InProcessEventBus = void 0;
const di_1 = require("@n8n/di");
const node_events_1 = require("node:events");
const MAX_EVENTS_PER_THREAD = 500;
const MAX_BYTES_PER_THREAD = 2 * 1024 * 1024;
let InProcessEventBus = class InProcessEventBus {
constructor() {
this.emitter = new node_events_1.EventEmitter();
this.store = new Map();
this.sizeBytes = new Map();
this.nextId = new Map();
this.emitter.setMaxListeners(0);
}
publish(threadId, event) {
const events = this.getOrCreateStore(threadId);
const id = (this.nextId.get(threadId) ?? 0) + 1;
this.nextId.set(threadId, id);
const stored = { id, event };
const eventSize = JSON.stringify(event).length;
events.push(stored);
this.sizeBytes.set(threadId, (this.sizeBytes.get(threadId) ?? 0) + eventSize);
this.evictIfNeeded(threadId, events);
this.emitter.emit(threadId, stored);
}
subscribe(threadId, handler) {
this.emitter.on(threadId, handler);
return () => this.emitter.off(threadId, handler);
}
getEventsAfter(threadId, afterId) {
const events = this.store.get(threadId);
if (!events)
return [];
return events.filter((e) => e.id > afterId);
}
getEventsForRun(threadId, runId) {
const events = this.store.get(threadId);
if (!events)
return [];
return events.filter((e) => e.event.runId === runId).map((e) => e.event);
}
getEventsForRuns(threadId, runIds) {
const events = this.store.get(threadId);
if (!events || runIds.length === 0)
return [];
const runIdSet = new Set(runIds);
return events.filter((e) => runIdSet.has(e.event.runId)).map((e) => e.event);
}
getNextEventId(threadId) {
return (this.nextId.get(threadId) ?? 0) + 1;
}
clearThread(threadId) {
this.store.delete(threadId);
this.sizeBytes.delete(threadId);
this.nextId.delete(threadId);
this.emitter.removeAllListeners(threadId);
}
clear() {
this.store.clear();
this.sizeBytes.clear();
this.nextId.clear();
this.emitter.removeAllListeners();
}
evictIfNeeded(threadId, events) {
let totalSize = this.sizeBytes.get(threadId) ?? 0;
while (events.length > MAX_EVENTS_PER_THREAD || totalSize > MAX_BYTES_PER_THREAD) {
const evicted = events.shift();
if (!evicted)
break;
totalSize -= JSON.stringify(evicted.event).length;
}
this.sizeBytes.set(threadId, Math.max(0, totalSize));
}
getOrCreateStore(threadId) {
let events = this.store.get(threadId);
if (!events) {
events = [];
this.store.set(threadId, events);
}
return events;
}
};
exports.InProcessEventBus = InProcessEventBus;
exports.InProcessEventBus = InProcessEventBus = __decorate([
(0, di_1.Service)(),
__metadata("design:paramtypes", [])
], InProcessEventBus);
//# sourceMappingURL=in-process-event-bus.js.map