Dubbo3应用开发—协议（Dubbo协议、REST协议 、gRPC协议、Triple协议）
协议
协议简介
什么是协议
Client(Consumer端)与Server（Provider端）在传输数据时双方的约定。
Dubbo3中常见的协议
1.dubbo协议[前面文章中使用的都是dubbo协议]
2.rest协议
3.triple协议
4.grpc协议
5.thirft协议
6.webservice协议
7.rocketmq协议
8.redis协议
9.memacached协议
...等等
不同协议的通信效率对比
dubbo官方提供的不同协议之间通信效率的对比如下：
Dubbo协议
1.Dubbo的默认协议，自己定义的私有协议，基于TCP层，默认的通信方式是Netty4;
2.Dubbo采用单一长连接和NIO异步通讯，适合于小数据量大并发的服务调用，反之，Dubbo缺省协议不适合传送大数据量的服务，比如传文件、传视频等。
官方提供的Dubbo协议结构图：
官方提供的Dubbo协议的帧组成图：
协议构成详见Dubbo2 协议规范 | Apache Dubbo
Dubbo协议的使用
准备——zookeeper的安装
https://archive.apache.org/dist/zookeeper/
如果使用windows，可以7z解压缩软件解压缩tar包的形式
https://sparanoid.com/lab/7z/
修改conf/zoo.cfg配置⽂件
dataDir=D:\\zookeeper\\apache-zookeeper-3.6.1\\data
启动服务端
启动客户端
https://github.com/vran-dev/PrettyZoo/releases
图形化zk的客户端
创建项目
父项目maven文件中对依赖版本进行管理
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<dubbo.version>3.2.0</dubbo.version>
<spring-boot.version>2.7.12</spring-boot.version>
<spring.version>5.3.25</spring.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-bom</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
引入相关依赖
<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.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
</dependency>
<!--zk注册中心 需要的依赖-->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper-curator5</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<exclusions>
<exclusion>
<artifactId>zookeeper</artifactId>
<groupId>org.apache.zookeeper</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.8.1</version>
</dependency>
<!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.22</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jcl</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!--<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-rpc-rest</artifactId>
<version>${dubbo.version}</version>
<exclusions>
<exclusion>
<artifactId>jackson-core-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-jaxrs</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-mapper-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-xc</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jackson-provider</artifactId>
<version>${resteasy-version}</version>
<exclusions>
<exclusion>
<artifactId>jackson-core-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-jaxrs</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-mapper-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-xc</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<artifactId>jackson-core-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
<version>${jackson-version}</version>
</dependency>
<dependency>
<artifactId>jackson-jaxrs</artifactId>
<groupId>org.codehaus.jackson</groupId>
<version>${jackson-version}</version>
</dependency>
<dependency>
<artifactId>jackson-mapper-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
<version>${jackson-version}</version>
</dependency>
<dependency>
<artifactId>jackson-xc</artifactId>
<groupId>org.codehaus.jackson</groupId>
<version>${jackson-version}</version>
</dependency>-->
</dependencies>
创建api、provider、consumer包，并编写代码。
provider的application.yml配置文件如下：
spring:
application:
name: DUBBO-PROTOCOL-PROVIDER
dubbo:
protocol:
name: dubbo
port: -1
registry:
address: zookeeper://127.0.0.1:2181
consumer的application.yml的配置如下：
spring:
application:
name: DUBBO-PROTOCOL-CONSUMER
dubbo:
registry:
address: zookeeper://127.0.0.1:2181
application:
qos-enable: false
REST协议
Rest协议就是我们平时说的Restful,本质上把他称为协议不准确。因为 Restful他是基于Http1.x协议的。 使⽤Rest协议这种⽅式可以让我们的Dubbo服务直接通过url进⾏访问，同时也可以更好的与SpringCloud技术栈进⾏整合。
搭建开发环境
父项目的pom文件核心如下：
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<dubbo.version>3.2.0</dubbo.version>
<spring-boot.version>2.6.11</spring-boot.version>
<jackson-version>1.9.13</jackson-version>
<resteasy-version>3.15.6.Final</resteasy-version>
<tomcat.version>9.0.75</tomcat.version>
<grpc.version>1.54.1</grpc.version>
<spring.version>5.3.25</spring.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.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
</dependency>
<!--zk注册中心 需要的依赖-->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper-curator5</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<exclusions>
<exclusion>
<artifactId>zookeeper</artifactId>
<groupId>org.apache.zookeeper</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.8.1</version>
</dependency>
<!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.22</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jcl</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-rpc-rest</artifactId>
<version>${dubbo.version}</version>
<exclusions>
<exclusion>
<artifactId>jackson-core-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-jaxrs</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-mapper-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-xc</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jackson-provider</artifactId>
<version>${resteasy-version}</version>
<exclusions>
<exclusion>
<artifactId>jackson-core-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-jaxrs</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-mapper-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-xc</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<artifactId>jackson-core-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
<version>${jackson-version}</version>
</dependency>
<dependency>
<artifactId>jackson-jaxrs</artifactId>
<groupId>org.codehaus.jackson</groupId>
<version>${jackson-version}</version>
</dependency>
<dependency>
<artifactId>jackson-mapper-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
<version>${jackson-version}</version>
</dependency>
<dependency>
<artifactId>jackson-xc</artifactId>
<groupId>org.codehaus.jackson</groupId>
<version>${jackson-version}</version>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-bom</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
provide pom文件引入的依赖:
<dependencies>
<dependency>
<groupId>com.sjdwz</groupId>
<artifactId>dubbo-protocol-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<artifactId>tomcat-embed-core</artifactId>
<groupId>org.apache.tomcat.embed</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-core</artifactId>
<version>${tomcat.version}</version>
</dependency>
</dependencies>
consumer只需要引入api模块即可。
api模块
java编码
@Path("orders")
@Consumes({MediaType.APPLICATION_JSON})
@Produces({ContentType.APPLICATION_JSON_UTF_8})
public interface OrderService {
@GET
@Path("{id}")
Order getOrder(@PathParam("id") Long id);
}
provider模块
application.yml文件
spring:
application:
name: DUBBO-PROTOCOL-PROVIDER
dubbo:
protocol:
name: rest
port: 9005
server: tomcat
contextpath: sjdwz
registry:
address: zookeeper://127.0.0.1:2181
server:
port: 8090
java代码
@DubboService
public class OrderServiceImpl implements OrderService {
@Override
public Order getOrder(Long id) {
System.out.println("OrderServiceImpl.getOrder id " + id);
return new Order("1001", 100.0);
}
}
运行起来
http://localhost:9005/sjdwz/orders/1
在浏览器输入上述url即可访问到。
consumer模块
java代码
@DubboReference(protocol = "rest")
private OrderService orderService;
@Test
public void test2(){
orderService.getOrder(2L);
}
gRPC协议
gRPC简介
Dubbo中的gRPC协议就是应⽤gRPC来替换Dubbo的RPC调⽤。本质上把它称为协议不准确,因为gRPC他是Google开源⼀种异构语⾔通信的RPC框
架。Dubbo引⼊gRPC的⽬的是为了更好的支持云原生的开发。
gRPC底层协议
gRPC底层基于Http2.x协议。Http2.x是双工协议，可以支持流式通信（反应式编程）。所以在通信效率上更高。
gRPC开发过程
1. 通过Protobuf的IDL定义通信数据，及操作。
2. 通过Maven的插件，根据不同的编程语言生成成对应的代码
3. 服务端发布RPC服务
3.1. ⼀元调⽤
3.2. 服务端流式RPC
3.3. 客户端流式RPC
3.4. 双向流式RPC
4. 客户端进⾏RPC服务的调⽤
4.1. 通过stub代理进⾏远端RPC的调⽤
Dubbo中gRPC协议的开发
本质上Dubbo对于gRPC协议的⽀持，就是在原有gRPC客户端代码上进行了封装。
父项目依赖设置
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<dubbo.version>3.1.10</dubbo.version>
<spring-boot.version>2.7.12</spring-boot.version>
<grpc.version>1.54.1</grpc.version>
<os.detected.classifier>windows-x86_64</os.detected.classifier>
<spring.version>5.3.25</spring.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.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
</dependency> <!--zk注册中心 需要的依赖-->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper-curator5</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<exclusions>
<exclusion>
<artifactId>zookeeper</artifactId>
<groupId>org.apache.zookeeper</groupId>
</exclusion>
</exclusions>
</dependency> <dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.8.1</version>
</dependency> <!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.22</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jcl</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency> </dependencies> <dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-bom</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency> <dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-bom</artifactId>
<version>${grpc.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
api模块的开发
pom文件修改
<dependencies>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-netty</artifactId>
<exclusions>
<exclusion>
<groupId>io.netty</groupId>
<artifactId>netty-codec-http2</artifactId>
</exclusion>
<exclusion>
<groupId>io.netty</groupId>
<artifactId>netty-handler-proxy</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-netty-shaded</artifactId>
</dependency>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-protobuf</artifactId>
<exclusions>
<exclusion>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-stub</artifactId>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-common</artifactId>
</dependency>
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
<version>3.21.7</version>
</dependency>
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java-util</artifactId>
<version>3.21.7</version>
<exclusions>
<exclusion>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>kr.motd.maven</groupId>
<artifactId>os-maven-plugin</artifactId>
<version>1.7.1</version>
</plugin>
<plugin>
<groupId>org.xolstice.maven.plugins</groupId>
<artifactId>protobuf-maven-plugin</artifactId>
<version>0.6.1</version>
<configuration>
<protocArtifact>com.google.protobuf:protoc:3.21.7:exe:${os.detected.classifier}</protocArtifact>
<pluginId>grpc-java</pluginId>
<pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}
</pluginArtifact>
<outputDirectory>${basedir}/src/main/java</outputDirectory>
<clearOutputDirectory>false</clearOutputDirectory>
<protocPlugins>
<protocPlugin>
<id>dubbo-grpc</id>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-compiler</artifactId>
<version>${dubbo.version}</version>
<mainClass>org.apache.dubbo.gen.grpc.DubboGrpcGenerator</mainClass>
</protocPlugin>
</protocPlugins>
</configuration>
<executions>
<execution>
<id>protobuf-maven-plugin</id>
<goals>
<goal>compile</goal>
<goal>compile-custom</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
provider模块的开发
application.yml文件
spring:
application:
name: DUBBO-PROTOCOL-PROVIDER
dubbo:
protocol:
name: grpc
port: -1
registry:
address: zookeeper://127.0.0.1:2181
# port: 8081
Java类
@DubboService
public class DemoServiceImpl extends DubboDemoServiceGrpc.DemoServiceImplBase {
@Override
public void demo(RequestData request, StreamObserver<ResponseData> responseObserver) {
System.out.println("DemoServiceImpl.demo " + request.getName());
responseObserver.onNext(ResponseData.newBuilder().setResult("this is result").build());
responseObserver.onCompleted();
}
}
consumer模块的开发
测试Java方法
@DubboReference(protocol = "grpc")
private DubboDemoServiceGrpc.IDemoService iDemoService;
@Test
void test3() {
ResponseData ret = iDemoService.demo(RequestData.newBuilder().setName("xiaohei").build());
System.out.println("ret.getResult() = " + ret.getResult());
}
Triple协议
Triple协议是什么
在阿里巴巴，Triple 协议广泛用于跨环境、跨语言、跨生态互通，已有数十万容器生产级使用。 Triple 协议是 Dubbo3设计的基于HTTP的RPC通信协议规范，它完全兼容 gRPC 协议，支持 Request-Response、Streaming流式等通信模型，可同时运行在HTTP/1和 HTTP/2之上。
核心:
1.Dubbo3全新设计的基于Http的RPC协议
2.完全兼容gRPC协议
3.支持Streaming流式通信【与gRPC类似】
4.同时支持HTTP1和HTTP2
5.对比内置的Dubbo协议，更好的支持异构语言通信，且更加适应云原生。
Dubbo原有已经支持了gRPC协议，为什么还要做Triple协议?
生态建设︰
1.如果只支持gRPC协议，不能够体现Dubbo的价值，毕竟gRPC是Google制定的。
Triple的优势:
1.不绑定IDL，支持Java lnterface 定义服务。(gRPC需要使用Protobuf,而Triple可以通过Java接口的方式进行服务的)
2.同时支持Http1和Http2协议，而gRPC只支持Http2协议。
3.100%兼容gRPC。从Dubbo3.2.x开始，已经废弃原有的gRPC协议使用Triple协议进行替代。
Triple协议的开发
父项目中pom文件，dubbo版本切换到3.2.0
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<dubbo.version>3.2.0</dubbo.version>
<grpc.version>1.54.1</grpc.version>
<spring-boot.version>2.7.12</spring-boot.version>
<protoc.version>3.21.7</protoc.version>
<os.detected.classifier>windows-x86_64</os.detected.classifier>
</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.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo</artifactId>
</dependency>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-all</artifactId>
<version>${grpc.version}</version>
<exclusions>
<exclusion>
<artifactId>grpc-netty</artifactId>
<groupId>io.grpc</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
<version>${protoc.version}</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper-curator5</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<exclusions>
<exclusion>
<artifactId>zookeeper</artifactId>
<groupId>org.apache.zookeeper</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.8.1</version>
</dependency>
<!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.22</version>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-bom</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-bom</artifactId>
<version>${grpc.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<extensions>
<extension>
<groupId>kr.motd.maven</groupId>
<artifactId>os-maven-plugin</artifactId>
<version>1.7.1</version>
</extension>
</extensions>
<plugins>
<plugin>
<groupId>org.xolstice.maven.plugins</groupId>
<artifactId>protobuf-maven-plugin</artifactId>
<version>0.6.1</version>
<configuration>
<protocArtifact>com.google.protobuf:protoc:3.21.7:exe:${os.detected.classifier}
</protocArtifact>
<pluginId>grpc-java</pluginId>
<pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}
</pluginArtifact>
<outputDirectory>${basedir}/src/main/java</outputDirectory>
<clearOutputDirectory>false</clearOutputDirectory>
<protocPlugins>
<protocPlugin>
<id>dubbo</id>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-compiler</artifactId>
<version>${dubbo.version}</version>
<mainClass>org.apache.dubbo.gen.tri.Dubbo3TripleGenerator</mainClass>
</protocPlugin>
</protocPlugins>
</configuration>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>test-compile</goal>
<goal>compile-custom</goal>
<goal>test-compile-custom</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
api模块的开发
syntax = "proto3";
option java_multiple_files = true;
option java_package = "com.sjdwz.tri";
package com.sjdwz.tri;
// The request message containing the user's name.
message GreeterRequest {
string name = 1;
}
// The response message containing the greetings
message GreeterReply {
string message = 1;
}
service Greeter{
// unary
rpc greet(GreeterRequest) returns (GreeterReply);
// serverStream
rpc greetServerStream(GreeterRequest) returns (stream GreeterReply);
// bi streaming
rpc greetStream(stream GreeterRequest) returns (stream GreeterReply);
}
在父项目执行上图maven命令。
provider模块的开发
application.yml
spring:
application:
name: DUBBO-TRIPLE-PROVIDER
dubbo:
protocol:
name: tri
port: -1
registry:
address: zookeeper://127.0.0.1:2181
服务接口的开发
@DubboService
public class GreeterImpl extends DubboGreeterTriple.GreeterImplBase {
@Override
public GreeterReply greet(GreeterRequest request) {
System.out.println("GreeterImpl.greet " + request.getName());
GreeterReply greeterReply = GreeterReply.newBuilder().setMessage("this is on method").build();
return greeterReply;
}
@Override
public StreamObserver<GreeterRequest> greetStream(StreamObserver<GreeterReply> responseObserver) {
System.out.println("GreeterImpl.greetStream");
responseObserver.onNext(GreeterReply.newBuilder().setMessage("bi stream result").build());
responseObserver.onCompleted();
return new StreamObserver<GreeterRequest>() {
@Override
public void onNext(GreeterRequest data) {
System.out.println(" recive request param = " + data.getName());
}
@Override
public void onError(Throwable throwable) {
}
@Override
public void onCompleted() {
System.out.println("GreeterImpl.onCompleted");
}
};
}
@Override
public void greetServerStream(GreeterRequest request, StreamObserver<GreeterReply> responseObserver) {
System.out.println("GreeterImpl.greetServerStream name " + request.getName());
responseObserver.onNext(GreeterReply.newBuilder().setMessage("this is result").build());
responseObserver.onCompleted();
}
}
consumer模块的开发
测试类的开发
@DubboReference(protocol = "tri")
private Greeter greeter;
@Test
void test2() {
GreeterRequest request = GreeterRequest.newBuilder().setName("xiaowb").build();
GreeterReply greeterReply = greeter.greet(request);
System.out.println("greeterReply.getMessage() = " + greeterReply.getMessage());
}
triple协议——grpc方式的开发
api模块
在api模块的pom文件执行如下命令；
consumer模块
gRPC adaptor类
package com.sjdwz;
import io.grpc.stub.StreamObserver;
public class GrpcStreamObserverAdapter<T> implements StreamObserver<T> {
private final org.apache.dubbo.common.stream.StreamObserver<T> delegate;
public GrpcStreamObserverAdapter(org.apache.dubbo.common.stream.StreamObserver<T> delegate) {
this.delegate = delegate;
}
@Override
public void onNext(T value) {
delegate.onNext(value);
}
@Override
public void onError(Throwable t) {
delegate.onError(t);
}
@Override
public void onCompleted() {
delegate.onCompleted();
}
}
Test类
@Test
void test4() {
ManagedChannel managedChannel = ManagedChannelBuilder.forAddress("localhost", 50051).usePlaintext().build();
try {
//一元操作
GreeterGrpc.GreeterBlockingStub greeterBlockingStub = GreeterGrpc.newBlockingStub(managedChannel);
//流式处理
GreeterGrpc.GreeterStub greeterStub = GreeterGrpc.newStub(managedChannel);
GreeterRequest request = GreeterRequest.newBuilder().setName("grpc").build();
greeterStub.greetServerStream(request, new GrpcStreamObserverAdapter<>(new StreamObserver<GreeterReply>() {
@Override
public void onNext(GreeterReply data) {
System.out.println("TestTripleDemo.onNext " + data.getMessage());
}
@Override
public void onError(Throwable throwable) {
}
@Override
public void onCompleted() {
System.out.println("TestTripleDemo.onCompleted");
}
}));
System.in.read();
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
managedChannel.shutdown();
}
}
triple协议——Java Interface的方式
需要记住两个规律：
1. message替换成Java类型
2. StreamObserver也用StreamObserver处理
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