标签：java JAVA proto Python server GRPC import python grpc
JAVA和Python的GRPC远程调用
1.使用springboot项目搭建Java端
1.1pom.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.3</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.grpc</groupId>
<artifactId>server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>java_server</name>
<description>JAVa的grpc端</description>
<properties>
<java.version>11</java.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>io.grpc</groupId>
<artifactId>grpc-netty-shaded</artifactId>
<version>1.26.0</version>
</dependency>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-protobuf</artifactId>
<version>1.26.0</version>
</dependency>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-stub</artifactId>
<version>1.26.0</version>
</dependency>
<!-- lombok插件-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<extensions>
<extension>
<groupId>kr.motd.maven</groupId>
<artifactId>os-maven-plugin</artifactId>
<version>1.6.2</version>
</extension>
</extensions>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.xolstice.maven.plugins</groupId>
<artifactId>protobuf-maven-plugin</artifactId>
<version>0.6.1</version>
<configuration>
<protocArtifact>com.google.protobuf:protoc:3.11.0:exe:${os.detected.classifier}</protocArtifact>
<pluginId>grpc-java</pluginId>
<pluginArtifact>io.grpc:protoc-gen-grpc-java:1.26.0:exe:${os.detected.classifier}</pluginArtifact>
<!--默认值-->
<protoSourceRoot>${project.basedir}/src/main/resources/proto</protoSourceRoot>
<outputDirectory>${project.basedir}/src/main/java/com/grpc/shiyun</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>true</clearOutputDirectory>
</configuration>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>compile-custom</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
1.2书写proto文件autochat.proto
syntax = "proto3";
option java_multiple_files = true;
package shiyun;
// The greeting service definition.
service AutoChat {
// Sends a greeting
rpc autoChat (AutoChatRequest) returns (AutoChatReply) {}
}
// The request message containing the user's name.
message AutoChatRequest {
string question = 1;
}
// The response message containing the greetings
message AutoChatReply {
string response = 1;
}
1.3使用protobuf插件生成Java代码
首先点击compile命令生成代码，然后再点击compile-custom生成代码，分两次生成。
2.使用Python生成代码
2.1安装protobuf
pip install grpcio
2.2使用 protoc 编译 proto 文件, 生成 python 语言的实现
# 安装 python 下的 protoc 编译器
pip install grpcio-tools
2.3编写autochat.proto文件（和Java的一致）
syntax = "proto3";
#在Python时候不需要这个选项
#option java_multiple_files = true;
package shiyun;
// The greeting service definition.
service AutoChat {
// Sends a greeting
rpc autoChat (AutoChatRequest) returns (AutoChatReply) {}
}
// The request message containing the user's name.
message AutoChatRequest {
string question = 1;
}
// The response message containing the greetings
message AutoChatReply {
string response = 1;
}
2.4编译文件
# 编译 proto 文件
python -m grpc_tools.protoc --python_out=. --grpc_python_out=. -I. autochat.proto
python -m grpc_tools.protoc: python 下的 protoc 编译器通过 python 模块(module) 实现, 所以说这一步非常省心
–python_out=. : 编译生成处理 protobuf 相关的代码的路径, 这里生成到当前目录
**–grpc_python_out=. : 编译生成处理 grpc 相关的代码的路径
-I. autochat.proto : proto 文件的路径, 这里的 proto 文件在当前目录
3.编写Java客户端代码
package com.grpc.client;
import io.grpc.ManagedChannel;
import io.grpc.ManagedChannelBuilder;
import io.grpc.StatusRuntimeException;
import shiyun.AutoChatRequest;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.logging.Logger;
public class AutoChatClient {
private static final Logger logger = Logger.getLogger(AutoChatClient.class.getName());
private final ManagedChannel channel;
private final shiyun.AutoChatGrpc.AutoChatBlockingStub blockingStub;
/**
* Construct client connecting to HelloWorld server at {@code host:port}.
*/
public AutoChatClient(String host, int port) {
this(ManagedChannelBuilder.forAddress(host, port)
// Channels are secure by default (via SSL/TLS). For the example we disable TLS to avoid
// needing certificates.
.usePlaintext()
.build());
}
/**
* Construct client for accessing HelloWorld server using the existing channel.
*/
AutoChatClient(ManagedChannel channel) {
this.channel = channel;
blockingStub = shiyun.AutoChatGrpc.newBlockingStub(channel);
}
public void shutdown() throws InterruptedException {
channel.shutdown().awaitTermination(5, TimeUnit.SECONDS);
}
/**
* Say hello to server.
*/
public void sendQuestion(String question) {
AutoChatRequest request = shiyun.AutoChatRequest.newBuilder().setQuestion(question).build();
shiyun.AutoChatReply response;
try {
response = blockingStub.autoChat(request);
logger.info("接收来自服务器的响应: " + response.getResponse());
} catch (StatusRuntimeException e) {
logger.log(Level.WARNING, "RPC failed: {0}", e.getStatus());
return;
}
}
/**
* Greet server. If provided, the first element of {@code args} is the name to use in the
* greeting.
*/
public static void main(String[] args) throws Exception {
// Access a service running on the local machine on port 50052
AutoChatClient client = new AutoChatClient("localhost", 50052);
try {
String user = "world";
// Use the arg as the name to greet if provided
if (args.length > 0) {
user = args[0];
}
int i = 0 ;
while (true){
client.sendQuestion(user+i++);
Thread.sleep(1000);
}
} finally {
client.shutdown();
}
}
}
4.Python服务端代码
from concurrent import futures
import time
import grpc
# 实现 proto 文件中定义的 AutoChatServicer
import autochat_pb2_grpc, autochat_pb2
_ONE_DAY_IN_SECONDS = 60 * 60 * 24
class AutoChatServer(autochat_pb2_grpc.AutoChatServicer):
def autoChat(self, request, context):
print("接收到客户端消息：" + request.question)
return autochat_pb2.AutoChatReply(response= request.question)
def serve():
server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
autochat_pb2_grpc.add_AutoChatServicer_to_server(AutoChatServer(), server)
server.add_insecure_port('[::]:50052')
print("启动服务器等待连接。。。。")
server.start()
try:
while True:
time.sleep(_ONE_DAY_IN_SECONDS)
except KeyboardInterrupt:
server.stop(0)
if __name__ == '__main__':
serve()
5.项目源代码已经同步到GitHub和gitee，如有需要请移步自行下载：
gitee: https://gitee.com/ljf2402901363/grpc.git
github: https://github.com/LJF2402901363/grpc.git
6.本博客已同步到个人博客，如有需要请移步：
http://moyisuiying.com/index.php/javastudy/springboot/479.html
标签：java,JAVA,proto,Python,server,GRPC,import,python,grpc 来源： https://blog.csdn.net/u011870022/article/details/118060375
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