egg-plugin-kafka/libs/client.js

An egg plugin that provides a number of built-in methods

const { KafkaClient } = require('kafka-node')

const defaultOptions = {
	kafkaHost: 'localhost:9092', // A string of kafka broker/host combination delimited by comma
	connectTimeout: 10000, // in ms it takes to wait for a successful connection before moving to the next host
	requestTimeout: 30000, // in ms for a kafka request to timeout
	autoConnect: true, // automatically connect when KafkaClient is instantiated otherwise you need to manually call connect
	// idleConnection: 5 * 60 * 1000 // allows the broker to disconnect an idle connection from a client
	// connectRetryOptions: // object hash that applies to the initial connection
	maxAsyncRequests: 10 // maximum async operations at a time toward the kafka cluster
	// sslOptions: '', // Object, options to be passed to the tls broker sockets
	// sasl: '' // Object, SASL authentication configuration (only SASL/PLAIN is currently supported)
}

module.exports = app => {
	const config = app.config.kafka || {}
	const client = new KafkaClient(
		Object.assign({}, defaultOptions, { kafkaHost: config.kafkaHost }, config.client || {})
	)
	// 监听错误事件
	client.on('error', err => {
		app.logger.error('[egg-plugin-kafka] Kafka client error:', err)
	})

	return client
}