is there any way to define httpheaders in single class,interface or annotation in java?

Question

is there any way to define httpheaders in single class in java? It is something like creating a wrapper class for userdefined httpHeaders used in my application. instead of defining all headers in my controller method.

@PostMapping
public <ResponseEntity<Book>> getBooks(
   @ModelAttribute("requestContext") RequestContext context, @PathVariable("bookId") String bookId,
   @RequestHeader(value="x-institute-id") String instituteId,
   @RequestHeader(value="x-customer-last-logged-time") String xCustomerLastLoggedTime,
   @RequestHeader(value="x-customer-ip-address") String xCustomerIpAddress,
   @RequestHeader(value="x-interaction-id", required=false) String xInteractionId){

     ---implementation

   }

So that It can be interface or annotations. Like:

public class MyApplicationHeaders{
   @RequestHeader(value="x-institute-id") String instituteId,
   @RequestHeader(value="x-customer-last-logged-time") String xCustomerLastLoggedTime,
   @RequestHeader(value="x-customer-ip-address") String xCustomerIpAddress,
   @RequestHeader(value="x-interaction-id", required=false) String xInteractionId)
}

So that we can use it as :

@PostMapping
public <ResponseEntity<Book>> getBooks(
   @ModelAttribute("requestContext") RequestContext context, @PathVariable("bookId") String bookId, @MyApplicationHeaders appHeaders{

     ---implementation

   }

Answer 1

According to the docs of @RequestHeader

If the method parameter is Map<String, String> , MultiValueMap<String, String> , or HttpHeaders then the map is populated with all header names and values.

This means you can use either a Map or HttpHeaders as a parameter type to hold multiple header values. In your case, Map is applicable since you are working on non-standard headers:

@PostMapping
public ResponseEntity<Book> getBooks(
    @ModelAttribute("requestContext") RequestContext requestContext,
    @PathVariable("bookId") String bookId,
    @HttpHeaders Map<String, String> appHeaders) {

    String instituteId = appHeaders.get("x-institute-id");
    // do something else
}