一 接口配置

1.1 接口

public interface UserService{

    /**
     * 依据id查找用户信息
     *
     * @param id 用户id
     * @return 用户，没有则返回null
     */
    User findById(long id);
}

1.2 consumer端

<?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-4.0.xsd
            http://code.alibabatech.com/schema/dubbo
            http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <dubbo:application name="${dubbo.app.name}" environment="${dubbo.env}"/>

    <dubbo:registry protocol="zookeeper" address="${dubbo.address}" timeout="${zk.connection.timeout}"/>

    <dubbo:consumer group="${dubbo.group}" check="false" timeout="${dubbo.timeout}"
                    retries="${dubbo.retries}"/>

    <dubbo:reference id="userService" interface="com.greatnew.data.service.UserService"/>
</beans>

1.3 provider端

1.3.1 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-4.0.xsd
            http://code.alibabatech.com/schema/dubbo
            http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <dubbo:application name="${dubbo.app.name}" environment="${dubbo.env}"/>

    <dubbo:registry protocol="zookeeper" address="${dubbo.address}" timeout="${zk.connection.timeout}"/>

    <dubbo:protocol name="dubbo" port="${dubbo.port}"/>

    <dubbo:provider group="${dubbo.group}" retries="${dubbo.retries}"/>

    <dubbo:service interface="com.greatnew.data.service.UserService" ref="userServiceImpl"/>
</beans>

1.3.2 接口实现

public class UserServiceImpl implements UserService {
    @Override
    public User findById(long id) throws RepositoryException {
        return repository.findById(id);
    }
}

二 调用流程

image.png