kafka傳送訊息的三種方式
阿新 • • 發佈:2020-07-30
package com.zl.kafkademo; import org.apache.kafka.clients.producer.Callback; import org.apache.kafka.clients.producer.KafkaProducer; import org.apache.kafka.clients.producer.ProducerRecord; import org.apache.kafka.clients.producer.RecordMetadata; import org.quartz.*; import org.quartz.impl.StdSchedulerFactory;import java.util.Properties; /** * @Auther: le * @Date: 2019/4/23 22:05 * @Description: */ public class MyProducer implements Job { private static KafkaProducer<String,String> producer; static { Properties properties = new Properties(); properties.put("bootstrap.servers","127.0.0.1:9092"); properties.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer"); properties.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer"); producer = new KafkaProducer<String, String>(properties); } /** * 第一種直接傳送,不管結果*/ private static void sendMessageForgetResult(){ ProducerRecord<String,String> record = new ProducerRecord<String,String>( "kafka-study","name","Forget_result" ); producer.send(record); producer.close(); } /** * 第二種同步傳送,等待執行結果 * @return * @throws Exception */ private static RecordMetadata sendMessageSync() throws Exception{ ProducerRecord<String,String> record = new ProducerRecord<String,String>( "kafka-study","name","sync" ); RecordMetadata result = producer.send(record).get(); System.out.println(result.topic()); System.out.println(result.partition()); System.out.println(result.offset()); return result; } /** * 第三種執行回撥函式 */ private static void sendMessageCallback(){ ProducerRecord<String,String> record = new ProducerRecord<String,String>( "kafka-study","name","callback" ); producer.send(record,new MyProducerCallback()); } //定時任務 @Override public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException { try { sendMessageSync(); }catch (Exception e){ System.out.println("error:"+e); } } private static class MyProducerCallback implements Callback{ @Override public void onCompletion(RecordMetadata recordMetadata, Exception e) { if (e !=null){ e.printStackTrace(); return; } System.out.println(recordMetadata.topic()); System.out.println(recordMetadata.partition()); System.out.println(recordMetadata.offset()); System.out.println("Coming in MyProducerCallback"); } } public static void main(String[] args){ //sendMessageForgetResult(); //sendMessageCallback(); JobDetail job = JobBuilder.newJob(MyProducer.class).build(); Trigger trigger = TriggerBuilder.newTrigger() .withSchedule(SimpleScheduleBuilder.repeatSecondlyForever()).build(); try { Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler(); scheduler.scheduleJob(job,trigger); scheduler.start(); }catch (SchedulerException e){ e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } }
需要引入檔案:
<dependency> <groupId>org.apache.kafka</groupId> <artifactId>kafka-clients</artifactId> <version>0.10.0.1</version> </dependency> <dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz</artifactId> <version>2.3.0</version> </dependency>