Kafkajs
// check here include example usage
// https://pastebin.com/Wu5hG6WK
import {
Consumer,
ConsumerConfig,
ConsumerSubscribeTopics,
EachBatchHandler,
EachMessagePayload,
Kafka as KafkaJs,
KafkaConfig,
Producer,
ProducerBatch,
ProducerConfig,
ProducerRecord,
Transaction
} from 'kafkajs'
interface ConsumerRunConfig {
autoCommit?: boolean
autoCommitInterval?: number | null
autoCommitThreshold?: number | null
eachBatchAutoResolve?: boolean
partitionsConsumedConcurrently?: number
eachBatch?: EachBatchHandler
}
interface SubscriberPayload {
subscribeConfig: ConsumerSubscribeTopics
consumerConfig: ConsumerConfig
runConfig: ConsumerRunConfig
}
interface PublisherPayload {
type: 'single' | 'multiple'
sendConfig: ProducerRecord | ProducerBatch
producerConfig?: ProducerConfig
}
interface PublisherTransactionPayload {
type: 'single' | 'multiple'
sendConfig: ProducerRecord | ProducerBatch
producerConfig?: ProducerConfig
}
export class Kafka {
private config: KafkaConfig
private kafka: InstanceType<typeof KafkaJs>
private producer: Producer
private consumer: Consumer
private transaction: Transaction
constructor(config: KafkaConfig) {
this.config = config
this.kafka = new KafkaJs(this.config)
}
async publisher(options: PublisherPayload): Promise<void> {
try {
this.producer = this.kafka.producer(options.producerConfig || {})
await this.notification('publisher', this.producer)
await this.producer.connect()
options.type == 'single'
? await this.producer.send(options.sendConfig as ProducerRecord)
: await this.producer.sendBatch(options.sendConfig as ProducerBatch)
await this.producer.disconnect()
} catch (e: any) {
console.error(`publisher is not working: ${e}`)
}
}
async publisherTransaction(options: PublisherTransactionPayload): Promise<void> {
try {
this.producer = this.kafka.producer(options.producerConfig || {})
this.transaction = await this.producer.transaction()
try {
await this.notification('publisher', this.producer)
await this.producer.connect()
options.type == 'single'
? await this.producer.send(options.sendConfig as ProducerRecord)
: await this.producer.sendBatch(options.sendConfig as ProducerBatch)
await this.transaction.commit()
await this.producer.disconnect()
} catch (e: any) {
if (this.transaction.isActive()) this.transaction.abort()
console.error(`publisher transaction is not working: ${e}`)
}
} catch (e: any) {
console.error(`publisher transaction is not working: ${e}`)
}
}
async subscriber(options: SubscriberPayload, cb: (payload: EachMessagePayload) => Promise<void>): Promise<void> {
try {
this.consumer = this.kafka.consumer(options.consumerConfig)
this.notification('subscriber', this.consumer)
await this.consumer.connect()
await this.consumer.subscribe(options.subscribeConfig)
await this.consumer.run({ ...(options.runConfig || {}), eachMessage: cb })
} catch (e: any) {
console.error(`subscriber is not working: ${e}`)
}
}
private async notification(type: string, handler: Producer | Consumer): Promise<void> {
try {
if (type == 'subscriber') {
this.consumer = handler as Consumer
await this.consumer.on('consumer.connect', () => console.info('consumer kafka connected'))
await this.consumer.on('consumer.network.request_timeout', () => console.error('consumer kafka network timeout'))
await this.consumer.on('consumer.crash', async (): Promise<void> => {
await this.consumer.disconnect()
console.error('consumer kafka crash')
})
await this.consumer.on('consumer.disconnect', async (): Promise<void> => {
await this.consumer.disconnect()
console.error('consumer kafka disconnect')
})
await this.consumer.on('consumer.stop', async (): Promise<void> => {
await this.consumer.stop()
console.error('consumer kafka disconnect')
})
}
if (type == 'publisher') {
this.producer = handler as Producer
await this.producer.on('producer.connect', (): void => console.info('producer kafka connected'))
await this.producer.on('producer.network.request_timeout', (): void => console.error('producer kafka network timeout'))
await this.producer.on('producer.disconnect', async (): Promise<void> => {
await this.producer.disconnect()
console.error('producer kafka disconnect')
})
}
} catch (e: any) {
console.error(`notification is not working: ${e}`)
}
}
}
Restu Wahyu Saputra
