@awesomeniko/kafka-trail/dist/kafka/kafka-broker.js

A Node.js library for managing message queue with Kafka

import KafkaJS from "kafkajs";
import { lz4Codec } from "../codec/lz4-codec.js";
const { Kafka, CompressionTypes, CompressionCodecs } = KafkaJS;
let registeredLz4CodecFn;
const ensureLz4CodecRegistered = (codecFn) => {
    const resolvedCodecFn = codecFn ?? lz4Codec;
    if (!registeredLz4CodecFn) {
        CompressionCodecs[CompressionTypes.LZ4] = () => resolvedCodecFn;
        registeredLz4CodecFn = resolvedCodecFn;
        return;
    }
    if (registeredLz4CodecFn !== resolvedCodecFn) {
        throw new Error("LZ4 codec is already registered with a different implementation");
    }
};
class KTKafkaBroker {
    _kafka;
    constructor(params) {
        const clientId = params.kafkaSettings.clientId ?? `consumer-${Date.now()}`;
        const { brokerUrls, connectionTimeout } = params.kafkaSettings;
        const { compressionCodec } = params.kafkaSettings;
        if (!compressionCodec || compressionCodec.codecType === CompressionTypes.LZ4) {
            ensureLz4CodecRegistered(compressionCodec?.codecFn);
        }
        if (!Array.isArray(brokerUrls)) {
            throw new Error("KafkaBrokerUrls must be an array");
        }
        this._kafka = new Kafka({
            clientId,
            brokers: brokerUrls,
            connectionTimeout,
            ...params.pureConfig,
        });
    }
    encode(message) {
        return JSON.stringify(message);
    }
    decode(message) {
        return JSON.parse(message);
    }
}
export { KTKafkaBroker };
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