kafka學習（三）----- Kafka整合SpringMVC實例

kafka學習（三）----- Kafka整合SpringMVC實例

1、概述

kafka一個高吞吐量的分佈式發佈訂閱消息系統。有關知識請參看：kafka基本概念以及環境搭建，kafka整合springMVC須要用到一個開源框架：spring-integration-kafka，這個官方框架我就不介紹了，請自行百度。

2、實例

1. 安裝Zookeeper

Zookeeper下載基本使用

2. 安裝Kafka

kafka基本概念以及環境搭建

3. 建立spring項目（建議使用maven方式建立）

項目截圖（小紅叉不影響項目的啓動）

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 能夠配置多個 -->
	<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" 不然接收不發數據 -->
	<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">
				<!-- 兩個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>
			<!-- 多個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>

其餘代碼請參看實例源碼：源碼下載

github下載地址

3、實例演示

a、先根據配置文件使用命令行建立兩個topic，截圖以下：

b、運行項目訪問 http://localhost:8080/SpringMvcWithKafka/kafka/test //測試地址 效果如圖：

c、查看kafka控制檯信息輸出,以下圖：

說明：若是使用最新版本的kafka，上面的例子可能就跑步起來了，猜想應該是kafka版本問題，因此推薦使用穩定版本。