Kafka Reconsume

A tiny messages reconsumer based on kafkajs

Basic usage

npm install kafka-reconsume

This will reconsume messages from a specific topic, starting from the given timestamp:

import { kafkaReconsume } from "kafka-reconsume"
import { Kafka } from "kafkajs"

const kafka = new Kafka({ brokers: ["localhost:9092"] }), 

(async function () { 
	const result = await kafkaReconsume(
		kafka,
		"my-topic",
		1202301233, //timestamp
		async (item) => {
			const message = item.message.value!.toString()
			console.log(item.topic, "==>", message)
		}
	)

	for (const partition in result) {
		console.log(
			"partition:", partition,
			"messages:", result[partition]
		)
	}
})()

• returns the number of reconsumed messages for each partition.
• Autocommit is always set to false, to ensure programmatic reconsume.
• By default a randomly generated consumer group id will be used, but it can be set proividing the whole consumer config as last optional argument.

Other utilities

Just two little wrappers around the main function:

await kafkaReconsumeByMillisecOffset(
	kafka,
	"my-topic",
	10000, //starts from 10 seconds ago
	async (item) => { /*....*/}
)

await kafkaReconsumeFromLocalDateTime(
	kafka,
	"my-topic",
	new Date("2023-06-06 00:00:00")
	async (item) => { /*....*/}
)