java spring 和 google 谷歌 gRpc 的整合运用
时间: 2023-07-16 16:14:24 浏览: 51
Java Spring和Google gRPC的整合可以实现使用gRPC协议的远程过程调用(RPC)在Spring应用程序中的使用。下面一些步骤:
1. 在pom.xml中添加以下赖项:
```
<dependency>
<groupIdorg.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifact>
</dependency>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-netty-shaded</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-stub</artifactId>
<version>${grpc.version}</version>
</dependency>
```
2. 创建服务定义文件
使用protobuf语言定义您的gRPC服务。这将生成Java类以进行客户端和服务器端通信。例如,假设我们想要定义一个简单的问候服务,服务定义文件可能如下所示:
```
syntax = "proto3";
option java_multiple_files = true;
option java_package = "com.example.grpc";
option java_outer_classname = "HelloWorldProto";
package helloworld;
service Greeter {
rpc SayHello (HelloRequest) returns (HelloReply) {}
}
message HelloRequest {
string name = 1;
}
message HelloReply {
string message = 1;
}
```
3. 生成Java类
使用protobuf编译器生成Java类。在pom.xml文件中添加以下插件:
```
<build>
<plugins>
<plugin>
<groupId>org.xolstice.maven.plugins</groupId>
<artifactId>protobuf-maven-plugin</artifactId>
<version>${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>
</configuration>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>compile-custom</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
```
然后运行以下maven命令来生成Java类:
```
mvn clean package
```
4. 创建gRPC客户端
在Spring应用程序中创建gRPC客户端。您可以使用@GrpcClient注释来注入您的客户端。例如:
```
@Component
public class MyClient {
@GrpcClient("myService")
private GreeterGrpc.GreeterBlockingStub greeterStub;
public String sendMessage(String name) {
HelloRequest request = HelloRequest.newBuilder().setName(name).build();
HelloReply response = greeterStub.sayHello(request);
return response.getMessage();
}
}
```
5. 创建gRPC服务器
在Spring应用程序中创建gRPC服务器。您可以使用@GrpcService注释来指定您的服务。例如:
```
@Service
public class MyServiceImpl extends GreeterGrpc.GreeterImplBase {
@Override
public void sayHello(HelloRequest request, StreamObserver<HelloReply> responseObserver) {
String message = "Hello " + request.getName() + "!";
HelloReply reply = HelloReply.newBuilder().setMessage(message).build();
responseObserver.onNext(reply);
responseObserver.onCompleted();
}
}
```
6. 配置gRPC服务器
在Spring应用程序中配置gRPC服务器。例如:
```
@Configuration
public class GrpcConfiguration {
@Value("${grpc.server.port}")
private int grpcServerPort;
@Bean
public Server grpcServer() throws IOException {
Server server = ServerBuilder.forPort(grpcServerPort)
.addService(myService())
.build();
server.start();
return server;
}
@Bean
public MyServiceImpl myService() {
return new MyServiceImpl();
}
}
```
7. 配置gRPC客户端
在Spring应用程序中配置gRPC客户端。例如:
```
@Configuration
public class GrpcConfiguration {
@Value("${grpc.server.host}")
private String grpcServerHost;
@Value("${grpc.server.port}")
private int grpcServerPort;
@Bean
public ManagedChannel grpcManagedChannel() {
return ManagedChannelBuilder.forAddress(grpcServerHost, grpcServerPort)
.usePlaintext()
.build();
}
@Bean
public MyClient myClient() {
return new MyClient();
}
}
```
这些步骤可以帮助您在Java Spring应用程序中集成Google gRPC。