当前版本:1.3.0
发布日期:20151206
发布日志参见 RELEASE.md
文档
参见 rpc-sample-api 模块
package com.xxx.rpc.sample.api;
public interface HelloService {
String hello(String name);
}
需要将 RPC 接口与 RPC 实现分别存放在不同的模块中
参见 rpc-sample-server 模块
<!-- RPC Sample API -->
<dependency>
<groupId>com.xxx.rpc</groupId>
<artifactId>rpc-sample-api</artifactId>
<version>${version.rpc}</version>
</dependency>
<!-- RPC Server -->
<dependency>
<groupId>com.xxx.rpc</groupId>
<artifactId>rpc-server</artifactId>
<version>${version.rpc}</version>
</dependency>
- RPC Sample API:RPC 接口所在模块的依赖
- RPC Server:RPC 服务端框架的依赖
package com.xxx.rpc.sample.server;
import com.xxx.rpc.sample.api.HelloService;
import com.xxx.rpc.server.RpcService;
@RpcService(HelloService.class)
public class HelloServiceImpl implements HelloService {
@Override
public String hello(String name) {
return "Hello! " + name;
}
}
- 必须在 RpcService 注解中指定 RPC 接口
- 若 RPC 接口拥有多个实现类,则需要在 RpcService 注解中指定 version 属性加以区分
<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="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.xsd">
<context:component-scan base-package="com.xxx.rpc.sample.server"/>
<context:property-placeholder location="classpath:rpc.properties"/>
<!-- Service Registry -->
<bean id="serviceRegistry" class="com.xxx.rpc.registry.zookeeper.ZooKeeperServiceRegistry">
<constructor-arg name="zkAddress" value="${rpc.registry_address}"/>
</bean>
<!-- RPC Server -->
<bean id="rpcServer" class="com.xxx.rpc.server.RpcServer">
<constructor-arg name="serviceAddress" value="${rpc.service_address}"/>
<constructor-arg name="serviceRegistry" ref="serviceRegistry"/>
</bean>
</beans>
- Service Registry:用于服务注册,若使用 ZooKeeper 实现,则需提供 ZooKeeper 地址、系统名、实例号
- RPC Server:用于发布 RPC 服务,需要提供服务器端口
注册到 ZooKeeper 中的 ZNode 路径为:registry/service/address
,前 2 个节点是持久的,最后 1 个节点是临时的
rpc.service_address=127.0.0.1:8000
rpc.registry_address=127.0.0.1:2181
- rpc.service_address:发布 RPC 服务的地址
- rpc.registry_address:ZooKeeper 服务器的地址
package com.xxx.rpc.sample.server;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class RpcBootstrap {
public static void main(String[] args) {
new ClassPathXmlApplicationContext("spring.xml");
}
}
运行 RpcBootstrap 类,将对外发布 RPC 服务,同时进行服务注册
参见 rpc-sample-client 模块
<!-- RPC Sample API -->
<dependency>
<groupId>com.xxx.rpc</groupId>
<artifactId>rpc-sample-api</artifactId>
<version>${version.rpc}</version>
</dependency>
<!-- RPC Client -->
<dependency>
<groupId>com.xxx.rpc</groupId>
<artifactId>rpc-client</artifactId>
<version>${version.rpc}</version>
</dependency>
- RPC Sample API:RPC 接口所在模块的依赖
- RPC Client:RPC 客户端框架的依赖
<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="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.xsd">
<context:property-placeholder location="classpath:rpc.properties"/>
<!-- Service Discovery -->
<bean id="serviceDiscovery" class="com.xxx.rpc.registry.zookeeper.ZooKeeperServiceDiscovery">
<constructor-arg name="zkAddress" value="${rpc.registry_address}"/>
</bean>
<!-- RPC Proxy -->
<bean id="rpcProxy" class="com.xxx.rpc.client.RpcProxy">
<constructor-arg name="serviceDiscovery" ref="serviceDiscovery"/>
</bean>
</beans>
- Service Discovery:用于服务发现,若使用 ZooKeeper 实现,则需提供 ZooKeeper 地址
- RPC Proxy:用于获取 RPC 代理接口
rpc.registry_address=127.0.0.1:2181
- rpc.registry_address:ZooKeeper 服务器的地址(IP 地址与端口)
@Autowired
private RpcProxy rpcProxy; // 1
...
HelloService helloService = rpcProxy.create(HelloService.class); // 2
String result = helloService.hello("World"); // 3
- 注入 RpcProxy 对象
- 调用 RpcProxy 对象的 create 方法来创建 RPC 代理接口
- 调用 RPC 代理接口的方法,就像调用远程接口方法一样