com.github.jchanghong.kafka.KafkaConsumerRunner.kt Maven / Gradle / Ivy

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package com.github.jchanghong.kafka

import cn.hutool.core.util.ClassUtil
import org.apache.kafka.clients.consumer.ConsumerRecord
import org.apache.kafka.clients.consumer.ConsumerRecords
import org.apache.kafka.clients.consumer.KafkaConsumer
import org.apache.kafka.common.errors.WakeupException
import org.slf4j.LoggerFactory
import java.time.Duration
import java.util.concurrent.atomic.AtomicBoolean
import java.util.function.Consumer

class KafkaConsumerRunner(
	private val consumer: KafkaConsumer,
	private val topics: List,
	val messageHandle: Consumer>
) :
	Runnable {
	private val closed = AtomicBoolean(false)
	private val log = LoggerFactory.getLogger(KafkaConsumerRunner::class.java)
	override fun run() {
		try {
			val method = ClassUtil.getDeclaredMethod(KafkaConsumer::class.java, "subscribe", List::class.java)
			val pollMethod = ClassUtil.getDeclaredMethod(KafkaConsumer::class.java, "poll", Duration::class.java)
			if (method != null) {
//            老版本版本kafka
				method.invoke(consumer, topics)
//            mConsumer.subscribe(topics)
				while (!closed.get()) {
					val consumerRecords: ConsumerRecords = if (pollMethod != null) consumer.poll(
						Duration.ofMillis(
							3600000
						)
					) else consumer.poll(3600000)
					if (consumerRecords.isEmpty) continue
					consumerRecords.forEach {
						try {
							messageHandle.accept(it)
						} catch (e: Throwable) {
							log.error(e.localizedMessage, e)
						}
					}
					// Handle new records
				}
			}

		} catch (e: WakeupException) {
			// Ignore exception if closing
			if (!closed.get()) throw e
		} catch (e2: Throwable) {
			// Ignore exception if closing
		} finally {
			consumer.close()
		}
	}

	// Shutdown hook which can be called from a separate thread
	fun shutdown() {
		closed.set(true)
		consumer.wakeup()
	}
}