Rest webservice Jersey Backbone jquery

  • GET to retrieve and search data
  • POST to add data
  • PUT to update data
  • DELETE to delete data

A typical resource class:

@Path("/wines")
public class WineResource {
    WineDAO dao = new WineDAO();
    @GET
    @Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
    public List<Wine> findAll() {
        return dao.findAll();
    }
    @GET @Path("search/{query}")
    @Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
    public List<Wine> findByName(@PathParam("query") String query) {
        return dao.findByName(query);
    }
    @GET @Path("{id}")
    @Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
    public Wine findById(@PathParam("id") String id) {
        return dao.findById(Integer.parseInt(id));
    }
    @POST
    @Consumes({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
    @Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
    public Wine create(Wine wine) {
        return dao.create(wine);
    }
    @PUT @Path("{id}")
    @Consumes({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
    @Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
    public Wine update(Wine wine) {
        return dao.update(wine);
    }
    @DELETE @Path("{id}")
    @Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
    public void remove(@PathParam("id") int id) {
        dao.remove(id);
    }
}

 

 

Quick look at the JAX-RS annotations used in this class:

  • @GET@POST@PUT@DELETE: HTTP method the class method responds to.
  • @Path: path the method responds to.
  • @Consumes: type of data the method can take as input. The data will automatically be deserialized into a method input parameter. For example, you can pass a wine object to the addWined() method either as JSON or XML. The JSON or XML representation of a new wine is automatically deserialized into the Wine object passed as an argument to the method.
  • @Produces: One or more response content type(s) the method can generate. The method’s return value will be automatically serialized using the content type requested by the client. If the client didn’t request a specific content type, the first content type listed in the @Produces annotation will be used. For example, if you access http://coenraets.org/rest/wines, you get a list of wines represented as JSON because it is the first content type listed in the @Produces annotation of the findAll() method.

 

Here is the jQuery code involved in calling the services:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
function findAll() {
    $.ajax({
        type: 'GET',
        url: rootURL,
        dataType: "json", // data type of response
        success: renderList
    });
}
function findByName(searchKey) {
    $.ajax({
        type: 'GET',
        url: rootURL + '/search/' + searchKey,
        dataType: "json",
        success: renderList
    });
}
function findById(id) {
    $.ajax({
        type: 'GET',
        url: rootURL + '/' + id,
        dataType: "json",
        success: function(data){
            $('#btnDelete').show();
            renderDetails(data);
        }
    });
}
function addWine() {
    console.log('addWine');
    $.ajax({
        type: 'POST',
        contentType: 'application/json',
        url: rootURL,
        dataType: "json",
        data: formToJSON(),
        success: function(data, textStatus, jqXHR){
            alert('Wine created successfully');
            $('#btnDelete').show();
            $('#wineId').val(data.id);
        },
        error: function(jqXHR, textStatus, errorThrown){
            alert('addWine error: ' + textStatus);
        }
    });
}
function updateWine() {
    $.ajax({
        type: 'PUT',
        contentType: 'application/json',
        url: rootURL + '/' + $('#wineId').val(),
        dataType: "json",
        data: formToJSON(),
        success: function(data, textStatus, jqXHR){
            alert('Wine updated successfully');
        },
        error: function(jqXHR, textStatus, errorThrown){
            alert('updateWine error: ' + textStatus);
        }
    });
}
function deleteWine() {
    console.log('deleteWine');
    $.ajax({
        type: 'DELETE',
        url: rootURL + '/' + $('#wineId').val(),
        success: function(data, textStatus, jqXHR){
            alert('Wine deleted successfully');
        },
        error: function(jqXHR, textStatus, errorThrown){
            alert('deleteWine error');
        }
    });
}
// Helper function to serialize all the form fields into a JSON string
function formToJSON() {
    return JSON.stringify({
        "id": $('#id').val(),
        "name": $('#name').val(),
        "grapes": $('#grapes').val(),
        "country": $('#country').val(),
        "region": $('#region').val(),
        "year": $('#year').val(),
        "description": $('#description').val()
        });
}

 

 

 

 

 

Here is a great

REST with Java (JAX-RS) using Jersey – Tutorial

 

Another blog using jax rs and backbone js with jQuery:

RESTful services with jQuery and Java using JAX-RS and Jersey

About these ads

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s