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基于http2.0协议的通信框架grpc

作者：互联网

基于http2.0协议的通信框架grpc

1. 定义

remote procedure call，远程过程调用，grpc即是这样一款应用程序之间通信的框架，基于http2.0协议，遵循server/client模型

2. 优点

  1. grpc通过protobuf文件来定义类以及接口，所以有非常严格的条件约束
  2. grpc是基于http2.0协议的，参数传输过程中，会把数据序列化为二进制编码，这样会大大减少传输数据的数据量，从而可以很大程度上提高性能
  3. grpc可以方便的支持流式通信(理论上通过http2.0就可以使用streaming模式）

4. 缺点

不支持分布式

5. 使用场景

  1. 需要对传参有严格条件约束的
  2. 对性能有更高要求时

6. 简单案例

创建公共依赖模块grpc-common，定义protobuf文件
pom文件引入相关依赖

 <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <grpc.version>1.37.0</grpc.version>
        <protobuf.version>3.16.0</protobuf.version>
    </properties>
    <dependencies>
        <!--protobuf工具类-->
        <dependency>
            <groupId>com.google.protobuf</groupId>
            <artifactId>protobuf-java-util</artifactId>
            <version>${protobuf.version}</version>
        </dependency>
        <!--grpc相关依赖-->
        <dependency>
            <groupId>io.grpc</groupId>
            <artifactId>grpc-stub</artifactId>
            <version>${grpc.version}</version>
        </dependency>
        <dependency>
            <groupId>io.grpc</groupId>
            <artifactId>grpc-protobuf</artifactId>
            <version>${grpc.version}</version>
        </dependency>
        <dependency>
            <groupId>io.grpc</groupId>
            <artifactId>grpc-netty</artifactId>
            <version>${grpc.version}</version>
        </dependency>
        <dependency>
            <groupId>jakarta.annotation</groupId>
            <artifactId>jakarta.annotation-api</artifactId>
            <version>1.3.5</version>
        </dependency>
    </dependencies>

    <build>
        <extensions>
            <extension>
                <groupId>kr.motd.maven</groupId>
                <artifactId>os-maven-plugin</artifactId>
                <version>1.5.0.Final</version>
            </extension>
        </extensions>
        <plugins>
            <plugin>
                <groupId>org.xolstice.maven.plugins</groupId>
                <artifactId>protobuf-maven-plugin</artifactId>
                <version>0.6.1</version>
                <extensions>true</extensions>
                <configuration>
                    <protocArtifact>com.google.protobuf:protoc:${protobuf.version}:exe:${os.detected.classifier}</protocArtifact>
                    <pluginId>grpc-java</pluginId>
                    <pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}</pluginArtifact>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                            <goal>compile-custom</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

Hello.proto

syntax = "proto3";

option java_multiple_files = true;
package com.lyj.grpc.service;

import public "google/protobuf/timestamp.proto";
import "google/protobuf/any.proto";

message People {
  string name = 1;
  google.protobuf.Timestamp createDate = 2;
}

message RspsMsg {
  string bizCode = 1;
  string bizDesc = 2;
  google.protobuf.Any data = 3;
}

service HelloService {
  rpc sayhello(People) returns (RspsMsg);
}

使用protobuf插件进行编译
在这里插入图片描述

创建服务端
pom文件引入依赖

	<properties>
        <java.version>1.8</java.version>
        <grpc-common.version>0.0.1-SNAPSHOT</grpc-common.version>
        <net.devh.grpc.version>2.12.0.RELEASE</net.devh.grpc.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>com.example</groupId>
            <artifactId>grpc-common</artifactId>
            <version>${grpc-common.version}</version>
        </dependency>
        <dependency>
            <groupId>net.devh</groupId>
            <artifactId>grpc-server-spring-boot-starter</artifactId>
            <version>${net.devh.grpc.version}</version>
        </dependency>
    </dependencies>

修改配置文件application.properties

spring.application.name=grpc-server
grpc.server.port=9090

创建服务端代码HelloGrpcServicelmpl.java

package com.example.grpcserver.grpc.server;

import com.google.protobuf.Timestamp;
import com.lyj.grpc.service.HelloServiceGrpc;
import com.lyj.grpc.service.People;
import com.lyj.grpc.service.RspsMsg;
import io.grpc.stub.StreamObserver;
import lombok.extern.slf4j.Slf4j;
import net.devh.boot.grpc.server.service.GrpcService;


/***
 * grpc服务端
 * @author: liyajie
 * @version: 1.0
 * @date: 2021/07/07 15:13
 */
@GrpcService
@Slf4j
public class HelloGrpcServicelmpl extends HelloServiceGrpc.HelloServiceImplBase {

    public void sayhello(People people, StreamObserver<RspsMsg> responseObserver){
        RspsMsg.Builder builder = RspsMsg.newBuilder();
        String name = people.getName();
        Timestamp timestamp = people.getCreateDate();
        responseObserver.onNext(builder.setBizCode("0000").setBizDesc(name + "在" + timestamp + "时间给你说hello").build());
        responseObserver.onCompleted();
    }
}

创建客户端
pom文件引入依赖

<properties>
        <java.version>1.8</java.version>
        <grpc-common.version>0.0.1-SNAPSHOT</grpc-common.version>
        <net.devh.grpc.version>2.12.0.RELEASE</net.devh.grpc.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>net.devh</groupId>
            <artifactId>grpc-client-spring-boot-starter</artifactId>
            <version>${net.devh.grpc.version}</version>
        </dependency>
        <dependency>
            <groupId>com.example</groupId>
            <artifactId>grpc-common</artifactId>
            <version>${grpc-common.version}</version>
        </dependency>
    </dependencies>

创建客户端代码HelloGrpcClient.java

package com.example.grpcclient.grpc.client;

import com.example.grpcclient.entity.People;
import com.google.protobuf.util.Timestamps;
import com.lyj.grpc.service.HelloServiceGrpc;
import com.lyj.grpc.service.RspsMsg;
import io.grpc.Channel;
import lombok.extern.slf4j.Slf4j;
import net.devh.boot.grpc.client.inject.GrpcClient;
import org.springframework.stereotype.Service;

/***
 * TODO
 * @author: liyajie
 * @version: 1.0
 * @date: 2021/07/07 16:01
 */
@Service
@Slf4j
public class HelloGrpcClient {
    @GrpcClient("grpc-server")
    private Channel channel;

    public String  sayHello(People request){
        HelloServiceGrpc.HelloServiceBlockingStub helloServiceBlockingStub = HelloServiceGrpc.newBlockingStub(channel);
        com.lyj.grpc.service.People people = com.lyj.grpc.service.People.newBuilder().setName(request.getName())
                .setCreateDate(Timestamps.fromMillis(request.getCreateDate().getTime()))
                .build();
        RspsMsg rspsMsg = helloServiceBlockingStub.sayhello(people);
        return "sayHello:" + rspsMsg.getBizCode();
    }
}

修改配置文件application.properties

spring.application.name=grpc-client
server.port=9091
grpc.client.grpc-server.address=static://localhost:9090
grpc.client.grpc-server.enableKeepAlive=true
grpc.client.grpc-server.keepAliveWithoutCalls=true
grpc.client.grpc-server.negotiationType=plaintext

创建测试实体类People.java

package com.example.grpcclient.entity;

import lombok.Data;

import java.util.Date;

/***
 * TODO
 * @author: liyajie
 * @version: 1.0
 * @date: 2021/07/07 16:12
 */
@Data
public class People {
    private String name;
    private Date createDate;
}

创建测试GrpcTestController.java

package com.example.grpcclient.controller;

import com.example.grpcclient.entity.People;
import com.example.grpcclient.grpc.client.HelloGrpcClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.Date;

/***
 * TODO
 * @author: liyajie
 * @version: 1.0
 * @date: 2021/07/07 16:02
 */
@RestController
public class GrpcTestController {
    @Autowired
    HelloGrpcClient helloGrpcClient;

    @GetMapping("/grpcTest")
    public String grpcTest(){
        People people = new People();
        people.setName("张三");
        people.setCreateDate(new Date());
        return helloGrpcClient.sayHello(people);
    }
}

测试结果：
在这里插入图片描述

标签：protobuf,框架,People,grpc,version,import,com,http2.0
来源： https://blog.csdn.net/liyj15/article/details/118545889