Developing RESTful Web Services with Jersey 2.0 by Sunil Gulabani

By Sunil Gulabani

JAX-RS 2.0 is an greater framework in keeping with RESTful structure. It offers help for either the customer and the server. Jersey 2.0 is the reference implementation of JAX-RS 2.0 (JSR 339 specification). This framework has passed through significant revisions. the improved framework is helping builders to exploit a low-level and simplified API.
This functional, hands-on consultant can help you to create RESTful net providers simply with person elements of the appliance requests. it's going to provide help to study and enforce RESTful net prone utilizing the recent positive aspects integrated in JAX-RS 2.0. It’s a bounce commence when you are looking to try out their hand on the new API. It goals to supply sensible wisdom of the API in addition to specified figuring out.

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Consumes can also accept multiple MIME types, for example: @Path("/helloWorld") @Consumes("multipart/related") public class HelloWorldResource { @POST public String processMultipart(MimeMultipart multipartData) { ... } @POST @Consumes("application/x-www-form-urlencoded") public String processForm(FormURLEncodedProperties formData) { ... } } In this example, the processMultipart() method will accept a class-level MIME type, "multipart/related", whereas processForm will override the class-level MIME type, and it will serve as a specified MIME type, application/x-www-form-urlencoded.

BeanParam This annotation allows injection of the parameters into a single bean. A bean annotated with @BeanParam containing any properties and other parameter annotations (such as @PathParam, @QueryParam, @MatrixParam, @HeaderParam, @CookieParam, @FormParam) will be mapped with request values. Therefore, instead of providing request values, such as parameter annotations (for example, @PathParam, @QueryParam, @MatrixParam, @HeaderParam, @CookieParam, and @FormParam) into a method parameter, the @BeanParam annotation can be used.

CookieParam Cookies are special types of HTTP headers. They are made up of name or value pairs that are passed to the resource implementation. The cookie is passed to-and-fro between the provider and the consumer with each request/response. Only consumers can modify the cookies. They are used to maintain sessions and store settings and other data. The @CookieParam annotation allows you to inject the value of a cookie or an object representation of an HTTP request cookie into your method invocation: @GET @Path("/getCookies") public String getCookies(@CookieParam("sessionid") int sessionId) { return "Session Id: " + sessionId; } In the example, the getCookies() method provides the value of the sessionId stored in the cookie.

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