Class RpcGreeterController

java.lang.Object

info.ejava.examples.svc.rpc.greeter.controllers.RpcGreeterController

@RestController
@RequestMapping("rpc/greeter")
public class RpcGreeterController
extends Object

The following is an example of using the HTTP constructs that are a part of a RESTful interface, but using them in an RPC way. The following is not even close to being RESTful and not what I will be referring to as REST-like.

Constructor Summary

Constructors

Constructor	Description
RpcGreeterController()

Method Summary

Modifier and Type	Method	Description
String	boom(String value)	This method is an example of the container returning an error when the client does not supply a required query parameter.
org.springframework.http.ResponseEntity<String>	createBoy(String name)	This method is an example of how the controller method can have full control over the response issued back to the caller.
org.springframework.http.ResponseEntity<String>	createBoyThrows(String name)	This method is an example of offloading detailed ResponseEntity handling to an @ExceptionHandler to keep the controller method clean.
org.springframework.http.ResponseEntity<String>	handle(IllegalArgumentException ex)	This is an example handler that will convert an exception to a ResponseEntity to return to the caller.
String	sayGreeting(String greeting, String name)
String	sayHi()	This is an example of a method as simple as it gets
private void	someMethodThatMayThrowException(String name)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

RpcGreeterController

public RpcGreeterController()

Method Details

sayHi

@GetMapping("sayHi")
public String sayHi()

This is an example of a method as simple as it gets

Returns:

hi

sayGreeting

@GetMapping("say/{greeting}")
public String sayGreeting(@PathVariable("greeting")
 String greeting,
 @RequestParam(value="name",defaultValue="you")
 String name)

boom

@GetMapping("boom")
public String boom(@RequestParam(value="value",required=true)
 String value)

This method is an example of the container returning an error when the client does not supply a required query parameter.

Parameters:

value -

createBoy

@PostMapping("boys")
public org.springframework.http.ResponseEntity<String> createBoy(@RequestParam("name")
 String name)

This method is an example of how the controller method can have full control over the response issued back to the caller.

Parameters:

name -

someMethodThatMayThrowException

private void someMethodThatMayThrowException(String name)

createBoyThrows

@PostMapping("boys/throws")
public org.springframework.http.ResponseEntity<String> createBoyThrows(@RequestParam("name")
 String name)

This method is an example of offloading detailed ResponseEntity handling to an @ExceptionHandler to keep the controller method clean.

Parameters:

name -

handle

@ExceptionHandler(IllegalArgumentException.class)
public org.springframework.http.ResponseEntity<String> handle(IllegalArgumentException ex)

This is an example handler that will convert an exception to a ResponseEntity to return to the caller. It is supplied within the controller here as a 1st step example. Later examples try to generalize the solution and create a service-wide advice.

Parameters:

ex -

Returns:

ResponseEntity