rpc-spring-starter

基本介绍

rpc-spring-starter是一个基于Netty、Zookeeper、Kryo、Javassist的RPC框架。SpringBoot项目开箱即用，自动发布服务，注入服务。该项目包含不限于RPC原理、Java基础（注解、反射、同步器、Future、SPI、动态代理）、Javassist字节码增强、服务注册与发现、Netty网络通讯、传输协议、序列化、TCP粘包\拆包、长连接复用、心跳检测、SpringBoot自动装载、服务分组、接口版本、Gzip包压缩、客户端连接池、负载均衡、异步调用等。

项目依赖

Zookeeper
JDK1.8+

架构图

传输协议

    0     1     2     3     4         5     6     7     8     9      10         11         12    13    14    15   16
    +-----+-----+-----+-----+---------+-----+-----+-----+-----+------+----------+----------+-----+-----+-----+-----+
    |   magic   code        | version |      full length      | type | protocol | compress |       RequestId       |
    +-----------------------+---------+-----------------------+------+----------+----------+-----------------------+
    |                                                                                                              |
    |                                             body                                                             |
    |                                                                                                              |
    |                                            ... ...                                                           |
    +--------------------------------------------------------------------------------------------------------------+
  4B  magic code（魔数）      1B version（协议版本）   4B full length（消息长度）    1B type（消息类型）
  1B  compress（压缩类型）     1B protocol（序列化类型）   4B requestId（请求的Id）
  body（object类型数据）

TODO List

使用方式

具体可参考演示项目

克隆本项目到本地install。

mvn clean install -DskipTests=true

添加maven依赖到你的SpringBoot项目中。

<dependency>
   <groupId>cn.ppphuang</groupId>
   <artifactId>rpc-spring-starter</artifactId>
   <version>0.0.1-SNAPSHOT</version>
</dependency>

启动ZK。
默认配置项在RpcConfig类中，可以通过application.properties来覆盖需要修改的配置项。

#是否启用rpc 默认启用
hp.rpc.enable=true
#注册中心地址
hp.rpc.register-address=127.0.0.1:2128
#服务暴露端口
hp.rpc.server-port=9999
#客户端随机负载均衡 默认：random，可选 random 随机 、round 轮询、 加权轮询 weightRound 、平滑加权轮询 smoothWeightRound
hp.rpc.load-balance=random
#序列化协议 默认：kryo, 可选 kryo 、 java 、 protobuf 、 hessian
hp.rpc.protocol=kryo
#服务是否启用压缩算法 默认：false
hp.rpc.enable-compress=false
#压缩算法 默认：Gzip, 目前可选 Gzip
hp.rpc.compress=Gzip
#Netty客户端是否使用连接池 默认：false
hp.rpc.enable-netty-channel-pool=false
#Netty客户端连接池中的最大连接数
hp.rpc.netty-channel-pool-max-connections=5
#Netty客户端连接池获取连接超时时是否创建新连接 默认：false
hp.rpc.netty-channel-pool-get-new-on-acquire-timeout=false
#服务代理类型 默认：javassist， 可选 reflect 反射调用、 javassist 字节码生成代理类调用
hp.rpc.server-proxy-type=javassist
#服务权重
hp.rpc.weight=1

服务端

定义服务接口。

public interface HelloService {
    String hello(String name);
}

实现服务接口并通过@RpcService注解发布服务。

import cn.ppphuang.rpcspringstarter.annotation.RpcService;
import cn.ppphuang.rpcspringstarter.annotation.Service;
import cn.ppphuang.rpcspringstarter.service.HelloService;

@RpcService
public class HelloServiceImpl implements HelloService {

   @Override
   public String hello(String name) {
       return name + "hello";
   }
}

import cn.ppphuang.rpcspringstarter.annotation.RpcService;
import cn.ppphuang.rpcspringstarter.service.HelloService;

@RpcService(group = "group1")
public class HelloServiceGroup1Impl implements HelloService {

   @Override
   public String hello(String name) {
       return name + "hello group1";
   }
}

import cn.ppphuang.rpcspringstarter.annotation.RpcService;
import cn.ppphuang.rpcspringstarter.service.HelloService;

@RpcService(group = "group1", version = "version1")
public class HelloServiceGroup1Version1Impl implements HelloService {

   @Override
   public String hello(String name) {
       return name + "hello group1 version1";
   }
}

当服务实现类实现了多个接口时，需要通过value注明该方法提供的是哪个服务接口的实现

import cn.ppphuang.rpcspringstarter.annotation.RpcService;
import cn.ppphuang.rpcspringstarter.service.HelloService;

@RpcService(value = "cn.ppphuang.rpcspringstarter.service.HelloService", group = "group2", version = "version2")
public class HelloServiceGroup2Version2Impl implements HelloService, PersionService {

   @Override
   public String hello(String name) {
       return name + "hello group2 version2";
   }
}

客户端

同步调用

使用@InjectService注解注入远程服务。

import cn.ppphuang.rpcspringstarter.annotation.InjectService;
import cn.ppphuang.rpcspringstarter.service.HelloService;
import org.springframework.stereotype.Service;

@Service
public class TestService1 {
   @InjectService
   HelloService helloService;

   @InjectService(group = "group1")
   HelloService helloServiceGroup1;

   @InjectService(group = "group1", version = "version1")
   HelloService helloServiceGroup1Version1;

   @InjectService(group = "group2", version = "version2")
   HelloService helloServiceGroup2Version2;

   public String sayHai(String name) {
       return helloService.hello(name);
   }

   public String sayHaiGroup1(String name) {
       return helloService.hello(name);
   }

   public String sayHaiGroup1Version1(String name) {
       return helloService.hello(name);
   }

   public String sayHaiGroup2Version2(String name) {
       return helloService.hello(name);
   }
}

手动获取代理对象。

class RpcSpringStarterApplicationTests {

    @Autowired
    ClientProxyFactory clientProxyFactory;

    @Test
    void testSync() throws InterruptedException {
        HelloService proxy = clientProxyFactory.getProxy(HelloService.class);
        String ppphuang = proxy.hello("ppphuang");
        System.out.println(ppphuang);
    }

    @Test
    void testSyncGroupVersion() throws InterruptedException {
        HelloService proxy = clientProxyFactory.getProxy(HelloService.class, "group1");
        String ppphuang = proxy.hello("ppphuang");
        System.out.println(ppphuang);
    }

    @Test
    void testSyncGroupVersion() throws InterruptedException {
        HelloService proxy = clientProxyFactory.getProxy(HelloService.class, "group1", "version1");
        String ppphuang = proxy.hello("ppphuang");
        System.out.println(ppphuang);
    }
}

异步调用

使用 CompletableFuture 异步方式

 class RpcSpringStarterApplicationTests {

    @Autowired
    ClientProxyFactory clientProxyFactory;

    @Test
    void testCompletableFutureAsync() {
        //构造异步客户端
        AsyncExecutor<HelloService> helloServiceAsyncExecutor = new AsyncExecutor<>(clientProxyFactory, HelloService.class, "", "");
        String name = "ppphuang";
        //通过异步客户端调用远程方法，返回CompletableFuture
        CompletableFuture<String> ppphuang = helloServiceAsyncExecutor.async(server -> server.hello(name));
        //通过whenComplete添加日志记录 一般使用handle处理之后不使用
        CompletableFuture<String> stringCompletableFuture = ppphuang.whenComplete(new LogErrorAction<>("server.hello", name));
        //通过handle处理 异常情况下的默认值 返回值为空时的默认值 日志记录
        CompletableFuture<String> hp = stringCompletableFuture.handle(new DefaultValueHandle<>(true, "hp", "server.hello", name));
        //获取结果
        System.out.println(hp.join());
    }
}

自定义异步回调类

首先继承AsyncReceiveHandler实现抽象方法。

public class TestCallBackHandler extends AsyncReceiveHandler {
    @Override
    public void callBack(Object context, Object result) {
        System.out.println(context);
        System.out.println(result);
    }

    @Override
    public void onException(Object context, Object result, Exception e) {
        System.out.println(context);
        System.out.println(result);
    }
}

手动获取异步代理对象。

class RpcSpringStarterApplicationTests {

    @Autowired
    ClientProxyFactory clientProxyFactory;

    @Test
    void testAsync() throws InterruptedException {
        //获取异步代理类
        HelloService proxy = clientProxyFactory.getProxy(HelloService.class, "group1", "version1", true);
        //继承AsyncReceiveHandler 实现抽象方法 然后实例化自定义的回调对象
        TestCallBackHandler callBackHandler = new TestCallBackHandler();
        //设置的回调上下文以及回调对象
        ClientProxyFactory.setLocalAsyncContextAndAsyncReceiveHandler("context", callBackHandler);
        //异步回调方法同步返回空
        String ppphuang = proxy.hello("ppphuang");
        System.out.println(ppphuang);
        Thread.sleep(10000);
    }
}

PPPHUANG/rpc-spring-starter

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