Springboot之接入gRPC

作者：我家小花儿 | 2024-02-19 19:43:28

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Springboot之接入gRPC

1、maven依赖


<properties>
    <!-- grpc -->
    <protobuf.version>3.5.1</protobuf.version>
    <protobuf-plugin.version>0.6.1</protobuf-plugin.version>
    <grpc.version>1.42.1</grpc.version>
    <os-maven-plugin.version>1.6.0</os-maven-plugin.version>
</properties>
 
<!-- grpc -->
<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>

2、编译环境构建


<build>
    <extensions>
        <!-- os-maven-plugin -->
        <extension>
            <groupId>kr.motd.maven</groupId>
            <artifactId>os-maven-plugin</artifactId>
            <version>${os-maven-plugin.version}</version>
        </extension>
    </extensions>
    <plugins>
        <!-- protobuf-maven-plugin -->
        <plugin>
            <groupId>org.xolstice.maven.plugins</groupId>
            <artifactId>protobuf-maven-plugin</artifactId>
            <version>${protobuf-plugin.version}</version>
            <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>
                <!--默认值-->
                <protoSourceRoot>${project.basedir}/src/main/proto</protoSourceRoot>
                <outputDirectory>${project.basedir}/src/main/java</outputDirectory>
                <!--设置是否在生成java文件之前清空outputDirectory的文件，默认值为true，设置为false时也会覆盖同名文件-->
                <clearOutputDirectory>false</clearOutputDirectory>
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>compile</goal>
                        <goal>compile-custom</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
 
    </plugins>
        
</build>

3、添加proto文件

在src/java同级添加proto文件夹，内部添加proto文件

修改java_package，生成包路径


syntax = "proto3";
 
option java_multiple_files = true;
option java_package = "com.bhl.biz.grpc";
 
package media_broker;
 
// The service definition.
service MediaBroker {
  rpc open(MediaObject) returns (MediaStatus) {};
 
  rpc fetchFrame(MediaObject) returns (FrameObject) {};
  rpc fetchImage(MediaObject) returns (ImageObject) {};
 
  rpc close(MediaObject) returns (MediaStatus) {};
}
 
message MediaObject {
  string address = 1;
}
 
message MediaStatus {
  bool status = 1;
  string message = 2;
}

4、生成代码

依次执行protobuf:compile、compile-custom

随后生成对应代码文件

5、注册grpc

官方参考demo

https://github.com/grpc/grpc-java/blob/master/examples/src/main/java/io/grpc/examples/helloworld/HelloWorldClient.java


import io.grpc.ManagedChannel;
import io.grpc.ManagedChannelBuilder;
 
private ManagedChannel channel;
private MediaBrokerGrpc.MediaBrokerBlockingStub blockingStub;
 
void init(){
    // 127.0.0.1 50051
    channel = ManagedChannelBuilder.forAddress(grpcConfig.getHost(), grpcConfig.getPort()).usePlaintext().build();
    blockingStub = MediaBrokerGrpc.newBlockingStub(channel);
}

核心文件 MediaBrokerGrpc

三种通信方式

6、发送请求

请求为已注册的服务


// 请求对象
MediaObject object = MediaObject.newBuilder().setAddress(address).build();
// 发送请求
MediaStatus status = blockingStub.open(object);
log.info(status.toString());
boolean result = status.getStatus();

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