juplo.de Git - demos/testing/blob - src/main/java/de/juplo/demo/RestController.java

   1 package de.juplo.demo;
   2
   3
   4 import org.springframework.http.HttpStatus;
   5 import org.springframework.http.MediaType;
   6 import org.springframework.web.bind.annotation.GetMapping;
   7 import org.springframework.web.bind.annotation.RequestParam;
   8 import org.springframework.web.reactive.function.client.WebClientResponseException;
   9 import org.springframework.web.reactive.function.client.WebClientResponseException.NotFound;
  10 import org.springframework.web.server.ResponseStatusException;
  11 import reactor.core.publisher.Mono;
  12
  13
  14 /**
  15  * Fetches and returns data from a remote-webserver.
  16  * @author Kai Moritz
  17  */
  18 @org.springframework.web.bind.annotation.RestController
  19 public class RestController
  20 {
  21   RemoteContentService service;
  22
  23
  24   public RestController(RemoteContentService service)
  25   {
  26     this.service = service;
  27   }
  28
  29
  30   @GetMapping(path = { "", "/" }, produces = MediaType.TEXT_PLAIN_VALUE)
  31   public Mono<String> fetch(@RequestParam String path)
  32   {
  33     return
  34         service
  35             .getRemoteText(path)
  36             .onErrorResume(t ->
  37             {
  38               if(t.getClass().equals(NotFound.class))
  39                 return Mono.error(new ResponseStatusException(HttpStatus.NOT_FOUND, "Cause: " + t.getMessage(), t));
  40               if(!(t instanceof WebClientResponseException))
  41                 return
  42                     Mono.error(
  43                         new ResponseStatusException(
  44                             HttpStatus.INTERNAL_SERVER_ERROR,
  45                             "Cause: " + t.getMessage(),
  46                             t));
  47
  48               return
  49                   Mono.error(
  50                       new ResponseStatusException(
  51                           HttpStatus.SERVICE_UNAVAILABLE,
  52                           "Cause: " + t.getMessage(),
  53                           t));
  54             });
  55   }
  56 }