dubbo service framework

       The previous article introduced zookeeper, as a service registry, how to configure clusters, etc. Next, use the dubbo development interface as a service provider to expose services to the outside world through zookeeper.

 

      First of all, the NIO framework of netty is used for communication between dubbo and zookeeper, and services are provided to the outside world. NIO's concurrent processing capability is relatively strong, which is also the main reason for the good performance of dubbo services.

 

     First, we can compile the dubbo-admin program to monitor the dubbo service we want to publish. After the compilation is complete, deploy the war report in tomcat, there is a configuration file, dubbo.properties under WEB-INF

wrote

dubbo.registry.address=zookeeper://127.0.0.1:4180
dubbo.admin.root.password=root
dubbo.admin.guest.password=guest

   Pay attention to modifying your own zookeeper cluster address

   Next, develop the agent registered by the service 

  

package com.mor.server.dubbo.service;


public interface DemoServer {

	String sayHello(String str);

}

 

/**
 *
 */
package com.mor.server.dubbo.service;

import java.util.Date;

public class DemoServerImpl implements DemoServer {

	/**
	 * return the added statement
	 */
	public String sayHello(String str) {
		str = "Hello " + str + "  2:" + new Date();
		System.err.println("server:" + str);
		return str;
	}

}

 

/**
 *
 */
package com.mor.main;

import java.io.IOException;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {

	public static void main(String[] args) throws IOException {
		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "applicationProvider.xml" });
		context.start();
		System.out.println("Press any key to exit");
		System.in.read();
	}

}

 

pom.xml writes

<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.mor.maven</groupId>
<artifactId>dubboserver</artifactId>
<version>0.0.1</version>
<packaging>jar</packaging>

<name>dubboserver</name>
<url>http://maven.apache.org</url>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring.version>3.1.4.RELEASE</spring.version>
<slf4j.version>1.6.6</slf4j.version>
</properties>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-asm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- spring end -->
<!-- log -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- dubbo -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
</dependency>
<!-- zkclient -->
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
<!-- zookeeper -->
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.3.6</version>
</dependency>
</dependencies>

<build>
<finalName>dubbo-demo</finalName>
<plugins>
<!-- 非多个资源配置 start-->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.1</version>
<configuration>
<source>1.5</source>
<target>1.5</target>
<encoding>UTF-8</encoding>
<failOnError>false</failOnError>
</configuration>
</plugin>
<!-- 非多个资源配置 end-->
</plugins>
</build>
</project>

 

   

applicationProvider.xml writes

<?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:dubbo="http://code.alibabatech.com/schema/dubbo"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd
">
<dubbo:application name="hello-world-app" />
<!-- 本机 伪集群 测试 -->
<dubbo:registry protocol="zookeeper" address="127.0.0.1:4180,127.0.0.1:4181,127.0.0.1:4182" />
<dubbo:protocol name="dubbo" port="20882" />
<dubbo:service interface="com.mor.server.dubbo.service.DemoServer"
ref="demoService" /> <!-- 和本地bean一样实现服务 -->
<bean id="demoService" class="com.mor.server.dubbo.service.DemoServerImpl" />
</beans>

 

  After running, open the admin management interface of dubbo, and you can see the registration information of the service, etc.

 

   Then develop the consumer

  

package com.mor.client.dubbo.action;

import java.util.Date;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.mor.server.dubbo.service.DemoServer;

public class ChatAction {

    public void SayHello(){
	ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "applicationConsumer.xml" });
	context.start();
	DemoServer demoServer = (DemoServer) context.getBean("demoService");
	System.out.println("client:"+demoServer.sayHello("Wanggq"+"1:"+new Date())+"3:"+new Date());
    }

}

 

package com.mor.client.dubbo.main;

import com.mor.client.dubbo.action.ChatAction;

public class Main {

    public static void main(String[] args) throws InterruptedException {
    	int i=0;
    	while(i++<100){
    		ChatAction act = new ChatAction ();
    		act.SayHello();
    		Thread.sleep(3000);
    	}
    }

}

 

wrote

<?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:dubbo="http://code.alibabatech.com/schema/dubbo"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd
">
<dubbo:application name="consumer-of-helloworld-app" /> <!-- 使用multicast广播注册中心暴露发现服务地址 -->
<dubbo:registry protocol="zookeeper" address="127.0.0.1:4180,127.0.0.1:4181,127.0.0.1:4182" /> <!-- Generate remote service proxy, you can use demoService like local bean -->
<dubbo:reference id="demoService" interface="com.mor.server.dubbo.service.DemoServer" />
</beans>

 

pom.xml writes

<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>demo-dubbo</groupId>
<artifactId>dubboclient</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>dubboclient</name>
<url>http://maven.apache.org</url>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring.version>3.1.4.RELEASE</spring.version>
<slf4j.version>1.6.6</slf4j.version>
</properties>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-asm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- spring end -->
<!-- log -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- dubbo -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
</dependency>
<!-- zkclient -->
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
<!-- zookeeper -->
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.4</version>
</dependency>
</dependencies>

<build>
<finalName>dubbo-demo</finalName>
<plugins>
<!-- 非多个资源配置 start-->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.1</version>
<configuration>
<source>1.5</source>
<target>1.5</target>
<encoding>UTF-8</encoding>
<failOnError>false</failOnError>
</configuration>
</plugin>
<!-- 非多个资源配置 end-->
</plugins>
</build>
</project>

 

Run the test to see the effect.