Spring multiple @PathVariable failure

There is no particular limit on number of PathVariable that you can add to a method.

But if you want to call your API with many different number of PathVariables you need to add a method for each of them, otherwise spring is not able to understand that you are calling the same method with a shorter number of path variables:

@GetMapping("/api/v1/data/{provider}/{subject}/{dataset}")
public List<List<String>> getEDXDatasetHead(
            @PathVariable final String provider,
            @PathVariable final String subject,
            @PathVariable final String dataset,
            @RequestParam(required = false, value = "date") final String date
) 


...


@GetMapping("/api/v1/data/{provider}/{subject}")
public List<List<String>> getEDXDatasetHead(
            @PathVariable final String provider,
            @PathVariable final String subject,
            @RequestParam(required = false, value = "date") final String date
) 

...


@GetMapping("/api/v1/data/{provider}")
public List<List<String>> getEDXDatasetHead(
            @PathVariable final String provider,
            @RequestParam(required = false, value = "date") final String date
) 

Note: spring doesn't have a particular limitation on the number of PathVariable that can be used in a method. But there are limitations on:

• the size of the generated url (if too long not all browser handle it correctly)
• the format of the url (check if you url encoded the path variables when you build the url on the client side)