title: Implementing Spring i18n and L10n on my REST API
body: <p>I am developing an API which has to support multiple languages, I am using #Spring i18n and L10n for this purpose.
  I am using Java configurations to define the beans as below:</p>
  
  <p>==================================================================================</p>
  
  <pre><code> @Bean    
  public MessageSource messageSource() {
      ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
      messageSource.setBasename("resources/StatusMessageSource");
     // messageSource.setDefaultEncoding("UTF-8");
      System.out.println("messagesource"+messageSource);
      return messageSource;
  }
  
   @Bean
   public LocaleChangeInterceptor localeChangeInterceptor(){
       LocaleChangeInterceptor localeChangeInterceptor=new LocaleChangeInterceptor();
       localeChangeInterceptor.setParamName("language");
       return localeChangeInterceptor;
   }
  
   @Bean(name = "localeResolver")
   public LocaleResolver sessionLocaleResolver(){
       SessionLocaleResolver localeResolver=new SessionLocaleResolver();
       localeResolver.setDefaultLocale(new Locale("en","SWEDEN"));
  
       return localeResolver;
   }  
  
   public void addInterceptors(InterceptorRegistry registry) {
       registry.addInterceptor(localeChangeInterceptor());
   }
  </code></pre>
  
  <p>where resources/StatusMessageSource is the location I am saving my property files to which I am reading to.</p>
  
  <p>I am sending the Locale as an header with the Json message and reading the locale value from the header so that I can get the corresponding property file.</p>
  
  <pre><code>    @RequestMapping(method = RequestMethod.GET, produces = "application/json")
      public ResponseEntity&lt;String&gt; getDatedFlightsLocalTimeByArrivalStation(
      @RequestHeader(value="locale") String localStr,
      @RequestParam(required = false) String carrier,
      @RequestParam(required = false) String flightNumber,
      @RequestParam(required = false) String departureLocation,
      @RequestParam(required = false) String scheduledDepartureDate,
      @RequestParam(required = false) String arrivalLocation,
      @RequestParam(required = false) String scheduledArrivalDate) {
      Gson gson = new Gson();
  </code></pre>
  
  <p>I have below parameter in the property files.</p>
  
  <pre><code>    ARRIVED=ARRIVED
  DEPARTED=DEPARTED
  DELAYED=DELAYED
  SCHEDULED=SCHEDULED
  CANCELLED=CANCELLED
  DIVERTED=DIVERTED
  </code></pre>
  
  <p>I am missing something here, as the I am not able to read the message from the file and getting the below error while testing through REST CLIENT and passing the header as EN_SV.</p>
  
  <pre><code>    org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [dispatcher] in context with path [/sas-flight] threw exception [Request processing failed; nested exception is org.springframework.context.NoSuchMessageException: No message found under code 'ARRIVED' for locale 'en_sv'.] with root cause
  org.springframework.context.NoSuchMessageException: No message found under code 'ARRIVED' for locale 'en_sv'.
      at             org.springframework.context.support.AbstractMessageSource.getMessage(AbstractMessageSource.java:159)
      at com.sas.dsp.api.flight.services.FlightService.getFlightStatus(FlightService.java:76)
      at com.sas.dsp.api.flight.controller.FlightController.getDatedFlightsLocalTimeByArrivalStation(FlightController.java:82)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:606)
      at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
      at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
      at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
      at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
      at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
      at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
      at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938)
      at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)
      at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
      at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:618)
      at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
      at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
      at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
      at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:534)
      at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1081)
      at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
      at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:277)
      at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2381)
      at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2370)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
      at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
      at java.lang.Thread.run(Thread.java:745)
  </code></pre>