RPC process details

Implementation content

• json serialization
• zookeeper implements service registration on the server side and service discovery and load balancing on the client side
• Automatically scan the interface provided by the server and register it in zookeeper
• Automatically generate client dynamic proxy objects
• socket communication

Module description

• Native core: public package: annotation, exception definition, communication protocol, serialization, zookeeper client encapsulation, package scanning, configuration loading and other tool classes
• Native customer: the module to be introduced by the caller to automatically generate the client dynamic proxy object, service discovery and load balancing of zk, and communication implementation
• Native provider: the module that the service provider needs to introduce, which implements the interface client request and processing, zk service registration
• Native interface: the definition of the interface to provide external services
• Shawn test provider: provider demo
• Shawn test customer: caller demo

To configure

provider configuration

scanPackage=com.shawntime.rpc.api
servicePort=11001

• scanPackage: package scanning path, automatically creating interface dynamic agent class under package path
• servicePort: monitoring port number of the server

<?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:cache="http://www.springframework.org/schema/cache"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-4.1.xsd
       http://www.springframework.org/schema/cache
       http://www.springframework.org/schema/cache/spring-cache-4.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

    <context:component-scan base-package="com.shawntime"/>
    <context:annotation-config/>
    <aop:aspectj-autoproxy proxy-target-class="true"/>

    <!-- Configure message formatting -->
    <bean id="jsonFormatter" class="com.shawntime.rpc.core.serialize.json.JsonFormatter" />
    <bean id="jsonParse" class="com.shawntime.rpc.core.serialize.json.JsonParse" />

    <!-- Configure service class, use socket Processing request -->
    <bean id="rpcProvider" class="com.shawntime.rpc.provider.service.socket.SocketRpcProvider">
        <property name="formatter" ref="jsonFormatter" />
        <property name="parse" ref="jsonParse" />
    </bean>

    <!-- To configure zk Server cluster information for service registration -->
    <bean id="zookeeperClient" class="com.shawntime.rpc.core.zookeeper.ZookeeperClient">
        <constructor-arg value="127.0.0.1:2181,127.0.0.1:2182,127.0.0.1:2183" />
    </bean>
</beans>

customer configuration

scanPackage=com.shawntime.rpc.api

• scanPackage: package scanning path, automatically creating interface dynamic agent class under package path

<?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:cache="http://www.springframework.org/schema/cache"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-4.1.xsd
       http://www.springframework.org/schema/cache
       http://www.springframework.org/schema/cache/spring-cache-4.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

    <context:component-scan base-package="com.shawntime"/>
    <context:annotation-config/>
    <aop:aspectj-autoproxy proxy-target-class="true"/>

    <!-- Configure message formatting -->
    <bean id="jsonFormatter" class="com.shawntime.rpc.core.serialize.json.JsonFormatter" />
    <bean id="jsonParse" class="com.shawntime.rpc.core.serialize.json.JsonParse" />
    
    <!-- Client processing configuration -->
    <bean id="socketInvoke" class="com.shawntime.rpc.customer.invoke.socket.SocketInvoke" />
    
    <bean id="beanNameGenerator" class="org.springframework.context.annotation.AnnotationBeanNameGenerator" />

    <!-- Client dynamic agent registration class -->
    <bean id="customBeanDefinitionRegistryPostProcessor"
          class="com.shawntime.rpc.customer.config.CustomBeanDefinitionRegistryPostProcessor">
        <property name="invoke" ref="socketInvoke" />
        <property name="formatter" ref="jsonFormatter" />
        <property name="parse" ref="jsonParse" />
        <property name="beanNameGenerator" ref="beanNameGenerator" />
        <property name="serviceFindManager" ref="serviceFindManager" />
    </bean>

    <!-- Service discovery and load balancing -->
    <bean id="serviceFindManager" class="com.shawntime.rpc.customer.ServiceFindManager">
        <property name="zookeeperClient" ref="zookeeperClient" />
    </bean>

    <!-- To configure zk Server cluster information for service registration -->
    <bean id="zookeeperClient" class="com.shawntime.rpc.core.zookeeper.ZookeeperClient">
        <constructor-arg value="127.0.0.1:2181,127.0.0.1:2182,127.0.0.1:2183" />
    </bean>
</beans>

Demo

• Interface definition, annotated with RpcService

@RpcService
public interface IUserService {

    UserOut getUserInfo(UserIn userIn, Integer level);

    void addUserProvince(ProvinceIn in);
}

• provider

package com.shawntime.test.provider;

import com.shawntime.rpc.api.IUserService;
import com.shawntime.rpc.api.contract.ProvinceIn;
import com.shawntime.rpc.api.contract.UserIn;
import com.shawntime.rpc.api.contract.UserOut;
import org.springframework.stereotype.Component;

@Component
public class UserService implements IUserService {

    public UserOut getUserInfo(UserIn userIn, Integer level) {
        UserOut userOut = new UserOut();
        if (level > 0) {
            userOut.setUserId(1);
            userOut.setAddress("Wuhu, Anhui");
            userOut.setAge(18);
            userOut.setUserName(userIn.getUserName());
        } else {
            userOut.setUserId(2);
            userOut.setAddress("Baoding, Hebei");
            userOut.setAge(19);
            userOut.setUserName(userIn.getUserName());
        }
        return userOut;
    }

    public void addUserProvince(ProvinceIn provinceIn) {
        System.out.println(provinceIn);
    }
}

• Caller

@Component
public class LoginService implements ILoginService {

    @Resource
    private IUserService userService;

    public boolean login(String userName, String password, Integer level) {
        UserIn userIn = new UserIn();
        userIn.setUserName(userName);
        userIn.setPassword(password);
        UserOut userInfo = userService.getUserInfo(userIn, level);
        System.out.println("userId:" + userInfo.getUserId()
                + ", age:" + userInfo.getAge()
                + ", address:" + userInfo.getAddress());
        return userInfo != null;
    }

    public int addUserProvince(ProvinceIn in) {
        userService.addUserProvince(in);
        return 1;
    }
}