kafka_2.11-0.10.0.1生产者producer的Java实现
转载自:http://blog.csdn.net/qq_26479655/article/details/52555283
首先导入包
- 将kafka目录下的
libs
中的jar包导入 - 用maven建立
- <dependency>
- <groupId>org.apache.kafka</groupId>
- <artifactId>kafka-clients</artifactId>
- <version>0.10.0.1</version>
- </dependency>
写好properties配置文件
一下为项目结构
- #kafka集群地址
- bootstrap.servers = 192.168.168.200:9092
- client.id = testProducer
- key.serializer = org.apache.kafka.common.serialization.IntegerSerializer
- value.serializer = org.apache.kafka.common.serialization.StringSerializer
然后上代码
- package kafka.producer;
- import java.io.IOException;
- import java.util.Properties;
- import java.util.concurrent.ExecutionException;
- 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;
- public class ProducerTest extends Thread{
- private final KafkaProducer<Integer, String> producer;
- private final String topic;
- private final Boolean isAsync;
- /*isAsync同步、异步*/
- public ProducerTest(String topic, Boolean isAsync) {
- Properties properties = new Properties();
- /*加载配置文件*/
- try {
- properties.load(ProducerTest.class.getClassLoader().getResourceAsStream("conf/kafka.producer.properties"));
- } catch (IOException e) {
- e.printStackTrace();
- }
- producer = new KafkaProducer<>(properties);
- this.topic = topic;
- this.isAsync = isAsync;
- }
- public void run() {
- int messageNo = 1;
- while (true) {
- String messageStr = "Message_" + messageNo;
- long startTime = System.currentTimeMillis();
- if (isAsync) { // Send asynchronously
- producer.send(new ProducerRecord<>(topic,
- messageNo,
- messageStr), new DemoCallBack(startTime, messageNo, messageStr));
- } else { // Send synchronously
- try {
- producer.send(new ProducerRecord<>(topic,
- messageNo,
- messageStr)).get();
- System.out.println("Sent message: (" + messageNo + ", " + messageStr + ")");
- } catch (InterruptedException | ExecutionException e) {
- e.printStackTrace();
- }
- }
- ++messageNo;
- }
- }
- }
- class DemoCallBack implements Callback {
- private final long startTime;
- private final int key;
- private final String message;
- public DemoCallBack(long startTime, int key, String message) {
- this.startTime = startTime;
- this.key = key;
- this.message = message;
- }
- /**
- * @param metadata The metadata for the record that was sent (i.e. the partition and offset). Null if an error
- * occurred.
- * @param exception The exception thrown during processing of this record. Null if no error occurred.
- */
- public void onCompletion(RecordMetadata metadata, Exception exception) {
- long elapsedTime = System.currentTimeMillis() - startTime;
- if (metadata != null) {
- System.out.println(
- "message(" + key + ", " + message + ") sent to partition(" + metadata.partition() +
- "), " +
- "offset(" + metadata.offset() + ") in " + elapsedTime + " ms");
- } else {
- exception.printStackTrace();
- }
- }
- }
测试代码
- package kafka.producer;
- public class Main {
- public static void main(String[] args) {
- ProducerTest test = new ProducerTest("TestTopic", true);
- test.start();
- }
- }
运行结果
- message(51215, Message_51215) sent to partition(0), offset(161830) in 3497 ms
- message(51216, Message_51216) sent to partition(0), offset(161831) in 3497 ms
- message(51217, Message_51217) sent to partition(0), offset(161832) in 3497 ms
- message(51218, Message_51218) sent to partition(0), offset(161833) in 3497 ms
- message(51219, Message_51219) sent to partition(0), offset(161834) in 3497 ms
- message(51220, Message_51220) sent to partition(0), offset(161835) in 3497 ms
- message(51221, Message_51221) sent to partition(0), offset(161836) in 3497 ms
- message(51222, Message_51222) sent to partition(0), offset(161837) in 3497 ms
- message(51223, Message_51223) sent to partition(0), offset(161838) in 3497 ms
- message(51224, Message_51224) sent to partition(0), offset(161839) in 3497 ms
- message(51225, Message_51225) sent to partition(0), offset(161840) in 3497 ms
- message(51226, Message_51226) sent to partition(0), offset(161841) in 3497 ms
- message(51227, Message_51227) sent to partition(0), offset(161842) in 3497 ms
- message(51228, Message_51228) sent to partition(0), offset(161843) in 3497 ms
- .............