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@awsmag/power-msk

v1.7.0

Published

A package to connect and work with AWS Kafka service

Downloads

196

Readme

power-msk

A package to help connect and work with Amazon Managed Streaming for Apache Kafka (MSK). You can run this package locally by disabling ssl and connecting to a kafka docker container.

Badges

MIT License

Environment Variables

The package supports two env variables

KAFKA_CLIENTID: Client id of the cluster

KAFKA_BROKERS: Comma separated list of brokers

Both the env vars are optional. You can either configure these or can pass them to the function.

Installation

install the package fron npm

  npm install @awsmag/power-msk

Usage/Examples

import { getKafkaClient } from "@awsmag/power-msk";

async function useWithEnvVarSet() {
  return await getKafkaClient(); // if env variables are set
}

async function useWithoutEnvVarSet() {
  const clientId = "test";
  const brokers = ["127.0.0.1:9092"];
  const ssl = false; // Keep it true when connecting to instance. For local testing and docker container keep it false
  return await getKafkaClient(clientId, brokers, ssl); // if env variables are not set
}

// connecting using AWS IAM
import { getKafkaClient, getAWSIAMAuthMechanism } from "@awsmag/power-msk";

const sasl = getAWSIAMAuthMechanism("eu-west-1");

const clientId = "test";
const brokers = ["127.0.0.1:9092"];
const ssl = true;
return await getKafkaClient(clientId, brokers, ssl, sasl);

The package also supports a Koa middleware to attach the client to ctx. This provides a function to sendmassegs to kafka. For creating consumer you should connect and get the client for implementation.

import { getKafkaClient, getKafkaClientMw } from "@awsmag/power-msk";
import Koa from "koa";

const server = new Koa();
const clientId = "test";
const brokers = ["127.0.0.1:9092"];
const ssl = false; // Keep it true when connecting to instance. For local testing and docker container keep it false
(async () => {
  await getKafkaClient(clientId, brokers, ssl); // if env variables are not set
  server.use(getKafkaClientMw());

  // rest of your code goes here
})();

// it will be available as `kafkaClient` in ctx. In your handler use it like below.

const kafkaClient = ctx.kafkaClient;
// perform functions using kafkaClient

The package is developed and maintained by S25Digital. You can also check our blog AWSMAG