zking2000 / NotePad

1 stars 0 forks source link

java #43

Closed zking2000 closed 3 months ago

zking2000 commented 3 months ago

好的,我会为您将这个Python Flask应用转换为一个等效的Java Spring Boot应用。我将创建一个完整的Java工程结构,并提供相应的代码内容。

project-root/
│
├── src/
│   └── main/
│       ├── java/
│       │   └── com/
│       │       └── example/
│       │           ├── Application.java
│       │           ├── controller/
│       │           │   └── ApiController.java
│       │           └── service/
│       │               ├── Service2Client.java
│       │               └── Service3Client.java
│       └── resources/
│           └── application.properties
│
└── pom.xml

// Application.java
package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

// ApiController.java
package com.example.controller;

import com.example.service.Service2Client;
import com.example.service.Service3Client;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.Map;

@RestController
@RequestMapping("/api/v1")
public class ApiController {

    @Autowired
    private Service2Client service2Client;

    @Autowired
    private Service3Client service3Client;

    @GetMapping("/start")
    public Map<String, Object> startProcess() {
        Map<String, Object> service2Result = service2Client.callService2();
        Map<String, Object> service3Result = service3Client.callService3();

        Map<String, Object> finalResult = new HashMap<>();
        finalResult.put("service1", "start_process");
        finalResult.put("service2_result", service2Result);
        finalResult.put("service3_result", service3Result);

        return finalResult;
    }
}

// Service2Client.java
package com.example.service;

import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

import java.util.Map;
import java.util.Random;

@Service
public class Service2Client {

    private final RestTemplate restTemplate = new RestTemplate();
    private final Random random = new Random();

    public Map<String, Object> callService2() {
        simulateNetworkLatency();
        return restTemplate.getForObject("http://service2:5001/api/v1/process", Map.class);
    }

    private void simulateNetworkLatency() {
        try {
            Thread.sleep((long) (random.nextDouble() * 1000 + 500));
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }
}

// Service3Client.java
package com.example.service;

import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

import java.util.Map;
import java.util.Random;

@Service
public class Service3Client {

    private final RestTemplate restTemplate = new RestTemplate();
    private final Random random = new Random();

    public Map<String, Object> callService3() {
        simulateNetworkLatency();
        return restTemplate.getForObject("http://service3:5002/api/v1/compute", Map.class);
    }

    private void simulateNetworkLatency() {
        try {
            Thread.sleep((long) (random.nextDouble() * 1000 + 500));
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }
}

// application.properties
server.port=5000

// pom.xml
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>api-e2e-call-tracing</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.5</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

这个Java Spring Boot项目结构和代码内容是对原Python Flask应用的等效转换。以下是主要组件的说明:

  1. Application.java: 这是Spring Boot应用的入口点。

  2. ApiController.java: 这个类处理 /api/v1/start 端点的GET请求,类似于原Python代码中的 start_process() 函数。

  3. Service2Client.javaService3Client.java: 这些服务类分别处理对service2和service3的调用,包括模拟网络延迟。

  4. application.properties: 配置文件,设置应用端口为5000。

  5. pom.xml: Maven项目配置文件,定义了项目依赖和构建设置。

要运行这个项目:

  1. 确保您的系统上安装了Java JDK (版本8或更高) 和 Maven。
  2. 在项目根目录下运行 mvn spring-boot:run

这个Java版本保留了原Python应用的主要功能,包括:

需要注意的是,您可能需要根据实际的网络环境调整service2和service3的URL。

如果您需要对这个Java项目进行任何修改或有任何问题,请随时告诉我。