kafka学习（三）----- Kafka整合SpringMVC实例

摘要: Kafka整合SpringMVC实例

kafka学习（三）----- Kafka整合SpringMVC实例

一、概述

kafka一个高吞吐量的分布式发布订阅消息系统。有关知识请参看：kafka基本概念以及环境搭建，kafka整合springMVC需要用到一个开源框架：spring-integration-kafka，这个官方框架我就不介绍了，请自行百度。

二、实例

1. 安装Zookeeper

Zookeeper下载基本使用

2. 安装Kafka

kafka基本概念以及环境搭建

3. 创建spring项目（建议使用maven方式创建）

项目截图（小红叉不影响项目的启动）



pom.xml配置

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion>
<groupId>com.kafka.demo</groupId>
<artifactId>SpringMvcWithKafka</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>SpringMvcWithKafka Maven Webapp</name>
<url>http://maven.apache.org</url>

<properties>
<spring.version>4.2.5.RELEASE</spring.version>
</properties>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-kafka</artifactId>
<version>1.3.0.RELEASE</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.7.6</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.7.6</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.7.6</version>
</dependency>
<dependency>
<groupId>org.apache.avro</groupId>
<artifactId>avro</artifactId>
<version>1.7.7</version>
</dependency>
</dependencies>
<build>
<finalName>SpringMvcWithKafka</finalName>
</build>
</project>

spring-kafka-consumer.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:int="http://www.springframework.org/schema/integration"
xmlns:int-kafka="http://www.springframework.org/schema/integration/kafka"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/integration/kafka http://www.springframework.org/schema/integration/kafka/spring-integration-kafka.xsd http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd"> 
<!-- topic test conf -->
<int:channel id="inputFromKafka">
<int:dispatcher task-executor="kafkaMessageExecutor" />
</int:channel>
<!-- zookeeper配置 可以配置多个 -->
<int-kafka:zookeeper-connect id="zookeeperConnect"
zk-connect="localhost:2181" zk-connection-timeout="6000"
zk-session-timeout="6000" zk-sync-time="2000" />
<!-- channel配置 auto-startup="true" 否则接收不发数据 -->
<int-kafka:inbound-channel-adapter
id="kafkaInboundChannelAdapter" kafka-consumer-context-ref="consumerContext"
auto-startup="true" channel="inputFromKafka">
<int:poller fixed-delay="1" time-unit="MILLISECONDS" />
</int-kafka:inbound-channel-adapter>
<task:executor id="kafkaMessageExecutor" pool-size="8" keep-alive="120" queue-capacity="500" />
<bean id="kafkaDecoder" class="org.springframework.integration.kafka.serializer.common.StringDecoder" />

<bean id="consumerProperties"
class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="properties">
<props>
<prop key="auto.offset.reset">smallest</prop>
<prop key="socket.receive.buffer.bytes">10485760</prop> <!-- 10M -->
<prop key="fetch.message.max.bytes">5242880</prop>
<prop key="auto.commit.interval.ms">1000</prop>
</props>
</property>
</bean>
<!-- 消息接收的BEEN -->
<bean id="kafkaConsumerService" class="com.kafka.demo.service.impl.KafkaConsumerService" />
<!-- 指定接收的方法 -->
<int:outbound-channel-adapter channel="inputFromKafka"
ref="kafkaConsumerService" method="processMessage" />

<int-kafka:consumer-context id="consumerContext"
consumer-timeout="1000" zookeeper-connect="zookeeperConnect"
consumer-properties="consumerProperties">
<int-kafka:consumer-configurations>
<int-kafka:consumer-configuration
group-id="default1" value-decoder="kafkaDecoder" key-decoder="kafkaDecoder"
max-messages="5000">
<!-- 两个TOPIC配置 -->
<int-kafka:topic id="myTopic" streams="4" />
<int-kafka:topic id="testTopic" streams="4" />
</int-kafka:consumer-configuration>
</int-kafka:consumer-configurations>
</int-kafka:consumer-context>
</beans>

spring-kafka-producer.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:int="http://www.springframework.org/schema/integration"
xmlns:int-kafka="http://www.springframework.org/schema/integration/kafka"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/integration/kafka http://www.springframework.org/schema/integration/kafka/spring-integration-kafka.xsd http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd"> 
<!-- commons config -->
<bean id="stringSerializer" class="org.apache.kafka.common.serialization.StringSerializer" />
<bean id="kafkaEncoder"
class="org.springframework.integration.kafka.serializer.avro.AvroReflectDatumBackedKafkaEncoder">
<constructor-arg value="java.lang.String" />
</bean>
<bean id="producerProperties"
class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="properties">
<props>
<prop key="topic.metadata.refresh.interval.ms">3600000</prop>
<prop key="message.send.max.retries">5</prop>
<prop key="serializer.class">kafka.serializer.StringEncoder</prop>
<prop key="request.required.acks">1</prop>
</props>
</property>
</bean>

<!-- topic test config -->

<int:channel id="kafkaTopicTest">
<int:queue />
</int:channel>

<int-kafka:outbound-channel-adapter
id="kafkaOutboundChannelAdapterTopicTest" kafka-producer-context-ref="producerContextTopicTest"
auto-startup="true" channel="kafkaTopicTest" order="3">
<int:poller fixed-delay="1000" time-unit="MILLISECONDS"
receive-timeout="1" task-executor="taskExecutor" />
</int-kafka:outbound-channel-adapter>
<task:executor id="taskExecutor" pool-size="5"
keep-alive="120" queue-capacity="500" />
<int-kafka:producer-context id="producerContextTopicTest"
producer-properties="producerProperties">
<int-kafka:producer-configurations>
<!-- 多个topic配置 -->
<int-kafka:producer-configuration
broker-list="localhost:9092" key-serializer="stringSerializer"
value-class-type="java.lang.String" value-serializer="stringSerializer"
topic="testTopic" />
<int-kafka:producer-configuration
broker-list="localhost:9092" key-serializer="stringSerializer"
value-class-type="java.lang.String" value-serializer="stringSerializer"
topic="myTopic" />
</int-kafka:producer-configurations>
</int-kafka:producer-context>
</beans>

其他代码请参看实例源码：源码下载

github下载地址

三、实例演示

a、先根据配置文件使用命令行创建两个topic，截图如下：



b、运行项目访问 http://localhost:8080/SpringMvcWithKafka/kafka/test //测试地址
效果如图：



c、查看kafka控制台信息输出,如下图：



说明：如果使用最新版本的kafka，上面的例子可能就跑步起来了，猜测应该是kafka版本问题，所以推荐使用稳定版本。