Kafka客户端Producer与Consumer
一、pom.xml <dependencies>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.11</artifactId>
<version>0.8.2.1</version>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>0.8.2.1</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.3</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<configuration>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.3</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<finalName>${project.artifactId}-${project.version}</finalName>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
<exclude>META-INF/LICENSE*</exclude>
<exclude>META-INF/NOTICE*</exclude>
<exclude>license/*</exclude>
<exclude>LICENSE*</exclude>
<exclude>NOTICE*</exclude>
</excludes>
</filter>
</filters>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ApacheLicenseResourceTransformer">
</transformer>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.bigData.DataProducer</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
producer.properties
#acks=1
bootstrap.servers=alary001:9092,alary002:9092,alary003:9092
retries=2
batch.size=16384
linger.ms=1
buffer.memory=33554432
key.serializer=org.apache.kafka.common.serialization.StringSerializer
value.serializer=org.apache.kafka.common.serialization.StringSerializer
log4j.properties
# Output pattern : date [thread] priority category - message FATAL 0 ERROR 3 WARN 4 INFO 6 DEBUG 7
log4j.rootLogger=INFO, Console
#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d %-5p [%c{5}] - %m%n
base.properties
topic=Data_Server
在集群上启动zookeeper
zkServer.sh start
查看zookeeper的状态
zkServer.sh status
启动kafka集群：
kafka-server-start.sh config/server.properties &
创建新的topic
kafka-topics.sh --create --zookeeper alary001:2181/home/hadoop/app/kafka_2.12-2.2.0,alary002:2181/home/hadoop/app/kafka_2.12-2.2.0,alary003:2181/home/hadoop/app/kafka_2.12-2.2.0 --replication-factor 3 --partitions 3 --topic Data_Server
查看topic副本信息
kafka-topics.sh --describe alary001:2181/home/hadoop/app/kafka_2.12-2.2.0,alary002:2181/home/hadoop/app/kafka_2.12-2.2.0,alary003:2181/home/hadoop/app/kafka_2.12-2.2.0 --replication-factor 3 --partitions 3 --topic Data_Server
查看已经创建的topic信息
kafka-topics.sh --list --zookeeper alary001:2181/home/hadoop/app/kafka_2.12-2.2.0,alary002:2181/home/hadoop/app/kafka_2.12-2.2.0,alary003:2181/home/hadoop/app/kafka_2.12-2.2.0
测试生产者发送消息
bin/kafka-console-producer.sh --broker-list alary001:9092,alary002:9092,alary003:9092 --topic Data_Server
测试消费者消费消息
kafka-console-consumer.sh --bootstrap-server alary001:9092,alary002:9092,alary003:9092 --from-beginning --topic Data_Server
删除topic
bin/kafka-topics.sh --zookeeper alary001:2181/home/hadoop/app/kafka_2.12-2.2.0,alary002:2181/home/hadoop/app/kafka_2.12-2.2.0,alary003:2181/home/hadoop/app/kafka_2.12-2.2.0 --delete --topic Data_Server
需要server.properties中设置delete.topic.enable=true否则只是标记删除或者直接重启。
停止Kafka服务
kafka-server-stop.sh stop
停止zookeeper集群
zkServer.sh stop
package com.zlkj.producer;
import org.apache.commons.lang3.StringUtils;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;
public class DataTransmission {
private static final Logger logger = LoggerFactory.getLogger(com.zlkj.producer.DataTransmission.class);
public static void main(String[] args) {
Properties baseConfiguration = new Properties();
Properties producerConfiguration = new Properties();
try {
baseConfiguration.load(com.zlkj.producer.DataTransmission.class.getResourceAsStream("/base.properties"));
if (args != null && args.length > 0 && StringUtils.isNoneBlank(args[0])) {
producerConfiguration.load(new FileInputStream(args[0]));
} else {
producerConfiguration.load(com.zlkj.producer.DataTransmission.class.getResourceAsStream("/producer.properties"));
}
} catch (IOException e) {
logger.error("=================加载配置异常=================");
}
//发送消息
Producer producer = new KafkaProducer<String, String>(producerConfiguration);
for (int i = 1; i <= 10; i++) {
String value = "value_" + i;
logger.info("发送的消息: {}", value);
ProducerRecord<String, String> msg = new ProducerRecord<String, String>(baseConfiguration.getProperty("topic"), value);
producer.send(msg);
}
producer.close();
}
}