1. Dubbo介紹
1.1 RPC
Remote Procedure Call
遠(yuǎn)程過(guò)程調(diào)用
9.2 Dubbo架構(gòu)
9.3 Dubbo在Zookeeper中注冊(cè)信息的結(jié)構(gòu)
2 Dubbo使用
2.1 創(chuàng)建Common工程
- group id：com.atguigu.dubbo
- artifact id：Pro20-dubbo-common
- package：jar
public class Employee implements Serializable {
private static final long serialVersionUID = 1L;
private Integer empId;
private String empName;
private Double salary;
……
}
public interface EmployeeRemoteService {
List<Employee> getEmployeeByConditionRemote(Employee employee);
}
2.2 創(chuàng)建Provider工程
- group id：com.atguigu.dubbo
- artifact id：Pro21-dubbo-provider
- package：war
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.6.8</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.5</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
<dependency>
<groupId>com.atguigu.dubbo</groupId>
<artifactId>Pro20-dubbo-common</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
配置web.xml
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-dubbo.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
Spring配置文件中Dubbo的配置
<?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: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">
<!-- 1.配置Dubbo應(yīng)用名稱 -->
<dubbo:application name="atguigu-dubbo-provider"/>
<!-- 2.指定注冊(cè)中心位置 -->
<dubbo:registry protocol="zookeeper" address="192.168.56.150" port="2181"/>
<!-- 3.指定consumer訪問(wèn)provider時(shí)使用的端口號(hào) -->
<dubbo:protocol name="dubbo" port="20880"/>
<!-- 4.配置接口的實(shí)現(xiàn)類 -->
<bean id="employeeServiceImpl" class="com.atguigu.dubbo.service.impl.EmployeeServiceImpl"></bean>
<!-- 5.將實(shí)現(xiàn)類關(guān)聯(lián)到接口 -->
<dubbo:service interface="com.atguigu.dubbo.api.EmployeeRemoteService" ref="employeeServiceImpl"></dubbo:service>
</beans>
EmployeeServiceImpl
public class EmployeeServiceImpl implements EmployeeRemoteService {
@Override
public List<Employee> getEmployeeByConditionRemote(Employee employee) {
System.out.println(employee);
List<Employee> empList = new ArrayList<>();
empList.add(new Employee(111, "empName111", 111.11));
empList.add(new Employee(222, "empName222", 222.22));
empList.add(new Employee(333, "empName333", 333.33));
return empList;
}
}
2.3 創(chuàng)建Consumer工程
- group id：com.atguigu.dubbo
- artifact id：Pro22-dubbo-consumer
- package：war
配置web.xml
<?xml version="1.0" encoding="UTF-8"?>
<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"
version="2.5">
<servlet>
<servlet-name>springDispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springDispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
配置Spring-mvc.xml
<?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"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<!-- SpringMVC相關(guān)配置 -->
<context:component-scan
base-package="com.atguigu.dubbo.handler" />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/" />
<property name="suffix" value=".jsp" />
</bean>
<mvc:annotation-driven />
<mvc:default-servlet-handler />
<!-- Dubbo配置：指定應(yīng)用名稱 -->
<dubbo:application name="atguigu-dubbo-consumer"/>
<!-- Dubbo配置：指定Dubbo注冊(cè)中心 -->
<dubbo:registry protocol="zookeeper" address="192.168.56.150" port="2181"></dubbo:registry>
<!-- Dubbo配置：引用接口代表的服務(wù) -->
<dubbo:reference id="employeeRemoteService" interface="com.atguigu.dubbo.api.EmployeeRemoteService"/>
</beans>
EmployeeHandler
@Controller
public class EmployeeHandler {
@Autowired
private EmployeeRemoteService employeeRemoteService;
@RequestMapping("/get/emp/list")
public String getEmpList() {
Employee employee = new Employee(666, "empName666", 666.66);
List<Employee> list = employeeRemoteService.getEmployeeByConditionRemote(employee);
for (Employee employee2 : list) {
System.out.println(employee2);
}
return "target";
}
}
