實(shí)現(xiàn)功能
存在2個(gè)系統(tǒng),A系統(tǒng)和B系統(tǒng),A系統(tǒng)調(diào)用B系統(tǒng)的接口獲取數(shù)據(jù).
安裝zookeeper
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解壓zookeeper-3.4.8.tar.gz,將/conf/zoo_sample.cfg修改為zoo.cfg,修改配置文件
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2.雙擊啟動(dòng)zookeeper
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創(chuàng)建工程B
-
新建B工程Maven項(xiàng)目
Paste_Image.png 導(dǎo)入依賴
<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>io.menm91</groupId>
<artifactId>dubbo-b</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>io.menm91</groupId>
<artifactId>dubbo-b-api</artifactId>
<version>1.0.0-SNAPSHOT</version>
</dependency>
<!-- dubbo采用spring配置方式个榕，所以需要導(dǎo)入spring容器依賴 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.6.4</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
<exclusions>
<exclusion>
<!-- 排除傳遞spring依賴 -->
<artifactId>spring</artifactId>
<groupId>org.springframework</groupId>
</exclusion>
</exclusions>
</dependency>
<!-- 導(dǎo)入zookeeper依賴 -->
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.3.3</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<port>8081</port>
<path>/</path>
</configuration>
</plugin>
</plugins>
</build>
</project>
-
配置log4j文件
log4j.properties
log4j.rootLogger=DEBUG,A1
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c]-[%p] %m%n
創(chuàng)建B-API工程
-
新建B-API工程MAVEN項(xiàng)目
Paste_Image.png 新建User類(lèi)
package io.menm91.bean;
//使用dubbo要求傳輸?shù)膶?duì)象必須實(shí)現(xiàn)序列化接口
public class User implements java.io.Serializable {
private static final long serialVersionUID = -2668999087589887337L;
private Long id;
private String username;
private String password;
private Integer age;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "User [username=" + username + ", age=" + age + "]";
}
}
- 創(chuàng)建UserService（接口）提供查詢服務(wù)
package io.menm91.service;
import io.menm91.bean.User;
import java.util.List;
public interface UserService {
/**
* 查詢所有用戶
* @return
*/
public List<User> queryAll();
}
在B工程中導(dǎo)入B-API的依賴
-
導(dǎo)入B-API工程的依賴
Paste_Image.png 創(chuàng)建UserServiceImpl實(shí)現(xiàn)類(lèi)
package io.menm91.service.impl;
import io.menm91.bean.User;
import io.menm91.service.UserService;
import java.util.ArrayList;
import java.util.List;
public class UserServiceImpl implements UserService {
/**
* 這里通過(guò)模擬查詢數(shù)據(jù)庫(kù)返回用戶信息
*/
public List<User> queryAll() {
List<User> list = new ArrayList<User>();
for (int i = 0; i < 10; i++) {
User user = new User();
user.setAge(10 + i);
user.setId(Long.valueOf(i + 1));
user.setPassword("123456");
user.setUsername("username_" + i);
list.add(user);
}
return list;
}
}
- 編寫(xiě)dubbo配置文件
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<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
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-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<!-- 提供方應(yīng)用信息，用于計(jì)算依賴關(guān)系 -->
<dubbo:application name="dubbo-b-server" />
<!-- 這里使用的注冊(cè)中心是zookeeper -->
<dubbo:registry address="zookeeper://127.0.0.1:2181"
client="zkclient" />
<!-- 用dubbo協(xié)議在20880端口暴露服務(wù) -->
<dubbo:protocol name="dubbo" port="20880" />
<!-- 將該接口暴露到dubbo中 -->
<dubbo:service interface="io.menm91.service.UserService"
ref="userServiceImpl" />
<!-- 將具體的實(shí)現(xiàn)類(lèi)加入到Spring容器中 -->
<bean id="userServiceImpl" class="io.menm91.service.impl.UserServiceImpl" />
</beans>
- 編寫(xiě)web.xml文件
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>dubbo-b</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:dubbo/dubbo-*.xml</param-value>
</context-param>
<!--Spring的ApplicationContext 載入 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
- 啟動(dòng)tomcat
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搭建A系統(tǒng)MAVEN項(xiàng)目
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創(chuàng)建A系統(tǒng)maven項(xiàng)目
Paste_Image.png 導(dǎo)入依賴
<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>io.menm91</groupId>
<artifactId>dubbo-a</artifactId>
<version>1.0.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>io.menm91</groupId>
<artifactId>dubbo-b-api</artifactId>
<version>1.0.0-SNAPSHOT</version>
</dependency>
<!-- dubbo采用spring配置方式，所以需要導(dǎo)入spring容器依賴 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.6.4</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
<exclusions>
<exclusion>
<!-- 排除傳遞spring依賴 -->
<artifactId>spring</artifactId>
<groupId>org.springframework</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.3.3</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
</project>
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配置log4j.properties文件
log4j.properties
log4j.rootLogger=DEBUG,A1 log4j.appender.A1=org.apache.log4j.ConsoleAppender log4j.appender.A1.layout=org.apache.log4j.PatternLayout log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c]-[%p] %m%n 編寫(xiě)dubbo配置文件
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<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
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-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<!-- 提供方應(yīng)用信息预伺，用于計(jì)算依賴關(guān)系 -->
<dubbo:application name="dubbo-a-consumer" />
<!-- 這里使用的注冊(cè)中心是zookeeper -->
<dubbo:registry address="zookeeper://127.0.0.1:2181"
client="zkclient" />
<!-- 從注冊(cè)中心中查找服務(wù) -->
<dubbo:reference id="userService"
interface="io.menm91.service.UserService" />
</beans>
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編寫(xiě)UserServiceTest測(cè)試類(lèi)
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package io.menm91.service;
import io.menm91.bean.User;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class UserServiceTest {
private UserService userService;
@Before
public void setUp() throws Exception {
ApplicationContext applicationContext = new ClassPathXmlApplicationContext(
"classpath:dubbo/dubbo-*.xml");
userService = applicationContext.getBean(UserService.class);
}
@Test
public void testQueryAll() {
List<User> userList = userService.queryAll();
for(User user : userList){
System.out.println(user.toString());
}
}
}
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查看輸出結(jié)果
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源代碼:https://github.com/menm91/dubbo-index.git
