InfoQ - Building REST with Spring - the Web/Controller layer

FooController.java

@Controller
public class FooController{
   
   @Autowired
   IFooService service;
   
   // API
   
   @RequestMapping( value = "admin/foo",params = { "page", "size" },method = GET )
   @ResponseBody
   public List< Foo > findPaginated( 
    @RequestParam( "page" ) int page, @RequestParam( "size" ) int size, 
    UriComponentsBuilder uriBuilder, HttpServletResponse response ){
      Page< Foo > resultPage = service.findPaginated( page, size );
      if( page > resultPage.getTotalPages() ){
         throw new ResourceNotFoundException();
      }
      eventPublisher.publishEvent( new PaginatedResultsRetrievedEvent< Foo >( 
       Foo.class, uriBuilder, response, page, resultPage.getTotalPages(), size ) );
      return resultPage.getContent();
   }
	
   @RequestMapping( value = "foo",method = RequestMethod.GET )
   @ResponseBody
   public List< Foo > getAll(){
      return service.getAll();
   }
   
   @RequestMapping( value = "foo/{id}",method = RequestMethod.GET )
   @ResponseBody
   public Foo get( @PathVariable( "id" ) Long id ){
      return RestPreconditions.checkNotNull( service.getById( id ) );
   }
   
   @RequestMapping( value = "foo",method = RequestMethod.POST )
   @ResponseStatus( HttpStatus.CREATED )
   @ResponseBody
   public Long create( @RequestBody Foo entity ){
      RestPreconditions.checkNotNullFromRequest( entity );
      return service.create( entity );
   }
   
   @RequestMapping( value = "foo",method = RequestMethod.PUT )
   @ResponseStatus( HttpStatus.OK )
   public void update( @RequestBody Foo entity ){
      RestPreconditions.checkNotNullFromRequest( entity );
      RestPreconditions.checkNotNull( service.getById( entity.getId() ) );
      service.update( entity );
   }
   
   @RequestMapping( value = "foo/{id}",method = RequestMethod.DELETE )
   @ResponseStatus( HttpStatus.OK )
   public void delete( @PathVariable( "id" ) Long id ){
      service.deleteById( id );
   }
}