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Dubbo(二)入门


Dubbo(二)入门
注册中心
Zookeeper

官方推荐使用zookeeper注册中心; 注册中心负责服务地址的注册与查找,相当于目录服务; 服务提供者和消费者只在启动时与注册中心交互,注册中不转发请求,压力较小; Zookeeper是apache hadoop的子项目,是一个树形的目录服务,支持变更推送,适合作为dubbo的服务注册中心,工业强度较高,可用于生产环境;


dubbo即是求职的人,也是招聘单位,而zookeeper就是人才市场/招聘网站;


服务提供方
<packaging>war</packaging>
<properties>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
<spring.version>5.0.6.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</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-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<!--dubbo -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.7</version>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.6</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
<dependency>
<groupId>javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.11.0.GA</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<configuration>
<port>8001</port>
<path>/</path>
</configuration>
<executions>
<execution>
<!-- 打包完成后,运行服务 -->
<phase>package</phase>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
/**
* @Program: dubbo_test
* @Author: XiaoXing
* @Create: 2021-01-14 22:09
* @Description: 服务接口
**/
public interface HelloService {
public String sayHello(String name);
}
import com.alibaba.dubbo.config.annotation.Service;
import service.HelloService;
/**
* @Program: dubbo_test
* @Author: XiaoXing
* @Create: 2021-01-14 22:09
* @Description: 服务接口实现类
**/
@Service
public class HelloServiceImpl implements HelloService {
@Override
public String sayHello(String name) {
return "Hello " + name + " !!!";
}
}
<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
https://www.springframework.org/schema/tx/spring-tx.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<!--1.服务提供方在zookeeper中的“别名”-->
<dubbo:application name="dubbo-test"/>
<!--2.注册中心的地址-->
<dubbo:registry address="zookeeper://106.75.245.83:2181"/>
<!--3.扫描类(将什么包下的类作为服务提供类)-->
<dubbo:annotation package="service.impl"/>
<!-- 让监控 去注册中心 自动找服务 -->
<dubbo:monitor protocol="registry"/>
</beans>
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring.xml</param-value>
</context-param>
</web-app>
服务消费方
<packaging>war</packaging>
<properties>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
<spring.version>5.0.6.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</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-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<!--dubbo -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.7</version>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.6</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
<dependency>
<groupId>javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.11.0.GA</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven </groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<configuration>
<port>8002</port>
<path>/</path>
</configuration>
<executions>
<execution>
<!-- 打包完成后,运行服务 -->
<phase>package</phase>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
/**
* @Program: dubbo_test2
* @Author: XiaoXing
* @Create: 2021-01-14 22:24
* @Description: 服务方接口声明而已,具体实现远程调用dubbo_test的service实现类
**/
public interface HelloService {
String sayHello( String name );
}
<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
https://www.springframework.org/schema/tx/spring-tx.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<!--1.服务提供方在zookeeper中的“别名”-->
<dubbo:application name="dubbo-test2"/>
<!--2.注册中心的地址-->
<dubbo:registry address="zookeeper://106.75.245.83:2181"/>
<!--3.扫描类(将什么包下的类作为服务提供类)-->
<dubbo:annotation package="controller"/>
<!-- 让监控 去注册中心 自动找服务 -->
<dubbo:monitor protocol="registry"/>
</beans>
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
/**
* @Program: dubbo_test2
* @Author: XiaoXing
* @Create: 2021-01-14 22:22
* @Description: 控制层
**/
@Controller
public class HelloAction {
@Reference // 远程去服务方将service的实现类注入进来
// @Autowired
private HelloService helloService;
@RequestMapping("/hello")
@ResponseBody
public String sayHi(String name){
System.out.println(name);
return helloService.sayHello(name);
}
}

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本文链接:https://blog.csdn.net/weixin_49741990/article/details/112689335

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