@dtu-olp-2024/kafka-nocobase
Version:
A NocoBase plugin for Apache Kafka integration, supporting message publishing, topic management, and event-driven workflows. Built for the DTU GreenHope project.
89 lines (87 loc) • 2.89 kB
JavaScript
/**
* This file is part of the NocoBase (R) project.
* Copyright (c) 2020-2024 NocoBase Co., Ltd.
* Authors: NocoBase Team.
*
* This project is dual-licensed under AGPL-3.0 and NocoBase Commercial License.
* For more information, please refer to: https://www.nocobase.com/agreement.
*/
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
if (from && typeof from === "object" || typeof from === "function") {
for (let key of __getOwnPropNames(from))
if (!__hasOwnProp.call(to, key) && key !== except)
__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
}
return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var eventListener_exports = {};
__export(eventListener_exports, {
KafkaEventListener: () => KafkaEventListener
});
module.exports = __toCommonJS(eventListener_exports);
var import_handler = require("./handler");
class KafkaEventListener {
producer;
consumer;
constructor(producer, consumer) {
this.producer = producer;
this.consumer = consumer;
}
async initializeTopics(topics, appInstance) {
try {
await this.consumer.subscribe({ topics });
await this.consumer.run({
eachMessage: async ({ topic, partition, message }) => {
try {
const handler = import_handler.topicHandlers[topic];
const messageValue = message.value ? Buffer.from(message.value).toString("utf8") : null;
if (messageValue) {
try {
const parsedMessage = JSON == null ? void 0 : JSON.parse(messageValue);
await handler(parsedMessage, appInstance);
} catch (jsonError) {
console.error("Error parsing JSON:", jsonError);
}
}
} catch (error) {
console.error(
`Error processing message from topic ${topic}:`,
error
);
}
}
});
} catch (error) {
console.error("Failed to initialize topics:", error);
throw error;
}
}
async emit(topic, message) {
try {
await this.producer.send({
topic,
messages: [
{
value: JSON.stringify(message)
}
]
});
} catch (error) {
console.error(`Failed to emit message to topic ${topic}:`, error);
throw error;
}
}
}
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
KafkaEventListener
});