> Opinionated OOP based node.js event sourcing library inspired by laravel-event-sourcing. 

> Opinionated OOP based node.js event sourcing library inspired by laravel-event-sourcing

jericopulvera

@halcyon-agile/node-event-sourcing

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var __importDefault = (this && this.__importDefault) || function (mod) {

    return (mod && mod.__esModule) ? mod : { "default": mod };

Object.defineProperty(exports, "__esModule", { value: true });

const EventStore_1 = __importDefault(require("./EventStore"));

    constructor(kafka, groupId, listeners) {

        this.kafkaConsumer = this.kafka.consumer({

        for (const listener of this.listeners) {

                topics.push(listener.event);

                topics.push(listener.constructor.name.slice(0, -8));

            await this.kafkaConsumer.connect();

            for (const topic of topics) {

                await this.kafkaConsumer.subscribe({ topic, fromBeginning: true });

            await this.kafkaConsumer.run({

                eachMessage: async ({ topic, partition, message }) => {

                    const event = Helper_1.tryParseJSONObject(message.value?.toString());

                    if (process.env.KAFKA_LOG_LEVEL?.toUpperCase() === "INFO") {

                        console.info(`Listener ${this.groupId} consuming ${topic} in partition ${partition}`);

                    if (typeof event === "object") {

                        const listener = this.listeners.find((listener) => listener.event === topic ||

                            listener.constructor.name.slice(0, -8) === topic);

                            handler = listener.__invoke;

                        if (typeof handler === "function" &&

                            typeof event.aggregateId === "string" &&

                            typeof event.version === "number" &&

                            typeof event.event === "string" &&

                            typeof event.committedAt === "number" &&

                            typeof event.published === "number") {

                                // @ts-ignore

                                await handler(event);

                            catch (error) {

                                let errorMessage = "Failed to do something exceptional";

                                if (error instanceof Error) {

                                    errorMessage = error.message;

                                await EventStore_1.default.createEvent({

                                    aggregateId: "ERROR",

                                    aggregateId: `ERROR#${topic}`,

                                    version: Number(Date.now()),

                                    event: "SystemUnhandledException",

                                    payload: {

                                        message: errorMessage,

                                        text: JSON.stringify(error),

                    this.kafkaConsumer.commitOffsets([

                            offset: String(Number(message.offset) + 1),

        run().catch((e) => console.error(`[example/consumer] ${e.message}`, e));

        if (process.env.KAFKA_LOG_LEVEL?.toUpperCase() === "INFO") {

            console.log(`Disconnecting: ${this.groupId}`);

    constructor(kafka, groupId, projector) {

        Object.getOwnPropertyNames(this.projector.prototype).forEach((value) => {

            if (value.slice(0, 2) === "on") {

                topics.push(value.slice(2));

            groupId: `${this.groupId}_${this.projector.name}`,

        const projector = new this.projector();

                        console.info(`Projector ${this.groupId}_${this.projector.name} consuming ${topic} in partition ${partition}`);

                        const handler = projector[`on${topic}`];

            console.log(`Disconnecting: ${this.projector.name}`);

  "name": "@halcyon-agile/node-event-sourcing",

  "description": "> Opinionated OOP based node.js event sourcing library inspired by laravel-event-sourcing",

    "eslint": "eslint '*/**/*.{js,ts}' --quiet --fix",

    "lint": "npm run eslint && npm run check-types",

    "@typescript-eslint/eslint-plugin": "^4.29.0",

    "@typescript-eslint/parser": "^4.29.0",

    "url": "git+https://github.com/jericopulvera/node-event-sourcing.git"

    "url": "https://github.com/jericopulvera/node-event-sourcing/issues"

  "homepage": "https://github.com/jericopulvera/node-event-sourcing#readme"

		{
		"name": "@halcyon-agile/node-event-sourcing",
		"version": "1.0.13",
		"version": "1.0.14",
		"description": "> Opinionated OOP based node.js event sourcing library inspired by laravel-event-sourcing",
		@@ -5,0 +5,0 @@ "main": "dist/index.js",

		@@ -62,3 +62,3 @@ "use strict";
		await EventStore_1.default.createEvent({
		aggregateId: "ERROR",
		aggregateId: `ERROR#${topic}`,
		version: Number(Date.now()),
		@@ -65,0 +65,0 @@ event: "SystemUnhandledException",

		@@ -57,3 +57,3 @@ "use strict";
		await EventStore_1.default.createEvent({
		aggregateId: "ERROR",
		aggregateId: `ERROR#${topic}`,
		version: Number(Date.now()),
		@@ -60,0 +60,0 @@ event: "SystemUnhandledException",

Improved metrics