why asynchronous influence controller in spring mvc?











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No.1 when my controller is:



@RestController
public class TestController{
@GetMapping(value="/test")
public CompletableFuture<Object> testController(){
.....
return CompletableFuture.completedFuture(XXX)
}


when i run this controller code, i find preHandle log 2 times in HandlerInterceptorAdapter



No.2 when my controller is:



public Callable<Object> getTokenService(HttpSession httpSession) {
Map<String, Object> map = new HashMap<>(8);
String token = UUID.randomUUID().toString();
httpSession.setAttribute("token", token);
map.put("data", httpSession.getAttribute("token"));
return () -> map;
}
public Callable<Object> getTokenController(HttpSession httpSession){
return () -> service.getTokenService();
}


when i run this controller code, (session is stored redis),i find just when i start tomcat server and run this ,session is changed,after i run again, session isn`t changed anymore










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    up vote
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    down vote

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    No.1 when my controller is:



    @RestController
    public class TestController{
    @GetMapping(value="/test")
    public CompletableFuture<Object> testController(){
    .....
    return CompletableFuture.completedFuture(XXX)
    }


    when i run this controller code, i find preHandle log 2 times in HandlerInterceptorAdapter



    No.2 when my controller is:



    public Callable<Object> getTokenService(HttpSession httpSession) {
    Map<String, Object> map = new HashMap<>(8);
    String token = UUID.randomUUID().toString();
    httpSession.setAttribute("token", token);
    map.put("data", httpSession.getAttribute("token"));
    return () -> map;
    }
    public Callable<Object> getTokenController(HttpSession httpSession){
    return () -> service.getTokenService();
    }


    when i run this controller code, (session is stored redis),i find just when i start tomcat server and run this ,session is changed,after i run again, session isn`t changed anymore










    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      No.1 when my controller is:



      @RestController
      public class TestController{
      @GetMapping(value="/test")
      public CompletableFuture<Object> testController(){
      .....
      return CompletableFuture.completedFuture(XXX)
      }


      when i run this controller code, i find preHandle log 2 times in HandlerInterceptorAdapter



      No.2 when my controller is:



      public Callable<Object> getTokenService(HttpSession httpSession) {
      Map<String, Object> map = new HashMap<>(8);
      String token = UUID.randomUUID().toString();
      httpSession.setAttribute("token", token);
      map.put("data", httpSession.getAttribute("token"));
      return () -> map;
      }
      public Callable<Object> getTokenController(HttpSession httpSession){
      return () -> service.getTokenService();
      }


      when i run this controller code, (session is stored redis),i find just when i start tomcat server and run this ,session is changed,after i run again, session isn`t changed anymore










      share|improve this question













      No.1 when my controller is:



      @RestController
      public class TestController{
      @GetMapping(value="/test")
      public CompletableFuture<Object> testController(){
      .....
      return CompletableFuture.completedFuture(XXX)
      }


      when i run this controller code, i find preHandle log 2 times in HandlerInterceptorAdapter



      No.2 when my controller is:



      public Callable<Object> getTokenService(HttpSession httpSession) {
      Map<String, Object> map = new HashMap<>(8);
      String token = UUID.randomUUID().toString();
      httpSession.setAttribute("token", token);
      map.put("data", httpSession.getAttribute("token"));
      return () -> map;
      }
      public Callable<Object> getTokenController(HttpSession httpSession){
      return () -> service.getTokenService();
      }


      when i run this controller code, (session is stored redis),i find just when i start tomcat server and run this ,session is changed,after i run again, session isn`t changed anymore







      java spring spring-mvc






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      share|improve this question










      asked Nov 17 at 15:15









      Lce Man

      134




      134





























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