#RESTful API using JAX-RS

• GET

• POST

• PUT

• DELETE

• Returning XML and JSON formats

• Pagination and Filtering

• Using Context and Bean Param Annotaions

• Implementing Subresources

• Sending Status codes and Location headers

  • Without Response

   @POST
   public Message addMessage(Message message) {
   	return messageService.addMessage(message);
   }
  

  • Response with StatusCode

   @POST
   public Response addMessage(Message message) {
   	Message newMessage = messageService.addMessage(message);
   	return Response.status(Status.CREATED)
   				   .entity(newMessage)
   				   .build();
   }
  

  • Response with Location

   @POST
   public Response addMessage(Message message, @Context UriInfo uriInfo) {
   	Message newMessage = messageService.addMessage(message);
   	String newId = String.valueOf(newMessage.getId());
   	URI uri = uriInfo.getAbsolutePathBuilder().path(newId).build();
   	return Response.created(uri)
   				   .entity(newMessage)
   				   .build();
   }
  

• Handling Exception

• Content Negotiation

  • Produce or Consume - Content Type of a desired type(Eg: XML or JSON or Plain Text)

  • For making it for all the Resource

  @Produces(value = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML, MediaType.TEXT_PLAIN})

  @Consumes(value = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML, MediaType.TEXT_PLAIN})

  • For making it for desired Resource

  • The can specify which Content-Type they want in the Header(Either XML or JSON)

   @GET
   @Produces(MediaType.APPLICATION_XML)
   public list<Message> getAllMessagesInXML() {
   	return messageService.getAllMessages();
   }
  

   @GET
   @Produces(MediaType.APPLICATION_JSON)
   public list<Message> getAllMessagesInJSON() {
   	return messageService.getAllMessages();
   }