SpringCloud融入Python的實現

阿新 • • 發佈：2020-01-07

前言

該篇文章分享如何將Python Web服務融入到Spring Cloud微服務體系中，並呼叫其服務，Python Web框架用的是Tornado

構建Python web服務

引入py-eureka-client客戶端

pip install py_eureka_client

manage.py

#!/usr/bin/env python
import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web
import py_eureka_client.eureka_client as eureka_client
from tornado.options import define,options
from time import sleep

define("port",default=3333,help="run on the given port",type=int)

class IndexHandler(tornado.web.RequestHandler):
  def get(self):
    username = self.get_argument('username','Hello')
    self.write(username + ',Administrator User!')
    
  def post(self):
    username = self.get_argument('username',Administrator User!')

class MainHandler(tornado.web.RequestHandler):
  def get(self):
    username = self.get_argument('username',Coisini User!')

  def post(self):
    username = self.get_argument('username',Coisini User!')

def main():
  tornado.options.parse_command_line()
  # 註冊eureka服務
  eureka_client.init_registry_client(eureka_server="http://localhost:31091/eureka/,http://localhost:8761/eureka/",app_name="python-tornado",instance_port=3333)
  app = tornado.web.Application(handlers=[(r"/test",IndexHandler),(r"/main",MainHandler)])
  http_server = tornado.httpserver.HTTPServer(app)
  http_server.listen(options.port)
  tornado.ioloop.IOLoop.instance().start()

if __name__ == '__main__':
  main()

大致說下上述程式碼，向埠為31091的註冊中心註冊服務名為python-tornado的服務，埠為3333，提供兩個請求方式為GET和POST，介面路徑為/test和/main的外部呼叫介面

啟動python服務(在此之前要建立一個Eureka服務註冊中心)

python manage.py runserver

執行結果

服務呼叫(Feign) - Feign用於便捷呼叫HTTP API

congfig類中需添加註解@EnableFeignClients，具體使用請百度

TestController.java

@RestController
public class TestController {
  private TestAPIClient testAPIClient;

  @Autowired
  public TestController(TestAPIClient testAPIClient) {
    this.testAPIClient = testAPIClient;
  }

  @PostMapping("/test")
  public String test(@RequestParam String username) throws Exception {
    return this.testAPIClient.test(username);
  }
  
  @GetMapping("/test")
  public String test1() throws Exception {
    return this.testAPIClient.test1();
  }
}

TestAPIClient.java

@FeignClient(name="python-tornado",configuration = FeignConfigure.class)
public interface TestAPIClient {
  @PostMapping("/test")
  String test(@RequestParam("username") String username);
  
  @GetMapping("/test")
  String test1();
}

FeignConfigure.java

import feign.Logger;
import feign.codec.Encoder;
import feign.form.spring.SpringFormEncoder;
import org.springframework.beans.factory.ObjectFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.web.HttpMessageConverters;
import org.springframework.cloud.netflix.feign.support.SpringEncoder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class FeignConfigure {
  @Bean
  Logger.Level feignLoggerLevel() {
    return Logger.Level.FULL;
  }

  @Autowired
  private ObjectFactory<HttpMessageConverters> messageConverters;
  
  @Bean
  public Encoder feignFormEncoder() {
    return new SpringFormEncoder(new SpringEncoder(messageConverters));
  }
}

Feign依賴

<!-- Feign Client -->
<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-feign</artifactId>
</dependency>
<dependency>
  <groupId>io.github.openfeign.form</groupId>
  <artifactId>feign-form</artifactId>
  <version>3.4.1</version>
</dependency>
<dependency>
  <groupId>io.github.openfeign.form</groupId>
  <artifactId>feign-form-spring</artifactId>
  <version>3.4.1</version>
</dependency>

執行結果