Kutuma na Kupokea Ujumbe na Apache Kafka in Node.js

Hatua ya 1: Sakinisha Maktaba ya Kafka kwa Node.js

Fungua saraka ya mradi terminal wako Node.js.

Tekeleza amri ifuatayo ili kusakinisha kafkajs maktaba, Node.js maktaba ya Apache Kafka: npm install kafkajs.

Hatua ya 2: Kutuma Ujumbe na Producer in Node.js

Ingiza kafkajs maktaba na ueleze Kafka Broker usanidi:

const { Kafka } = require('kafkajs');  
  
const kafka = new Kafka({  
  clientId: 'your-client-id',  
  brokers: ['broker1:port1', 'broker2:port2'], // Replace with actual addresses and ports  
});  

Unda producer kutuma ujumbe, na utume ujumbe kwa topic:

const producer = kafka.producer();  
  
const sendMessage = async() => {  
  await producer.connect();  
  await producer.send({
    topic: 'your-topic',  
    messages: [{ value: 'Hello Kafka!' }],  
  });  
  await producer.disconnect();  
};  
  
sendMessage();  

Hatua ya 3: Kupokea Ujumbe na Consumer in Node.js

Ingiza kafkajs maktaba na ufafanue Kafka Broker usanidi(ikiwa haujafanywa tayari):

const { Kafka } = require('kafkajs');  
  
const kafka = new Kafka({  
  clientId: 'your-client-id',  
  brokers: ['broker1:port1', 'broker2:port2'], // Replace with actual addresses and ports  
});  

Unda consumer ili kupokea ujumbe kutoka maalum topic:

const consumer = kafka.consumer({ groupId: 'your-group-id' });  
  
const consumeMessages = async() => {  
  await consumer.connect();  
  await consumer.subscribe({ topic: 'your-topic', fromBeginning: true });  
  
  await consumer.run({  
    eachMessage: async({ topic, partition, message }) => {  
      console.log(`Received message: ${message.value}`);  
    },  
  });  
};  
  
consumeMessages();  

Kumbuka: Badilisha maadili kama 'your-client-id', 'broker1:port1', 'your-topic', na 'your-group-id' uweke maelezo yako halisi ya mradi.

Hakikisha kuwa umerejelea hati rasmi Apache Kafka na kafkajs maktaba kwa maelezo zaidi kuhusu chaguo za usanidi na utendakazi.