Posts Tagged ‘JavaOne’

Jersey 1.9.1 Released

September 16th, 2011

Over the past two weeks, I’ve been working with Pavel on finalizing and staging the bits for the hands-on-lab on OAuth, we are going to do at this year’s JavaOne. As part of that, I had to make a few more clean-ups in the Jersey OAuth client library, so we decided to make a branch for 1.9.1 and make those clean-ups along with some other small fixes there. Now, 2 weeks after 1.9, we released it. This is the release we’ll be using for JavaOne and although the release cycle was so short, it does have two nice additions worth highlighting.

  • Un-/marshalling collection types
    Until 1.9.1, JAXB un-/marshalling in Jersey worked only for Collection and List interfaces. I.e. if your resource method returned (or took as a parameter) Collection<Foo> or List<Foo> (where Foo was a JAXB bean), de-/serialization from/to XML/JSON would work, but if it returned LinkedList<Foo> or Set<Foo> or any other Collection subtype, it would not work. This is fixed in 1.9.1 and you can now return and retrieve any well-known interfaces that extend Collection (such as Set, Queue, etc.) and their implementations which have default public constructor.
  • PostReplaceFilter improvements
    PostReplaceFilter can be used to support clients which can’t send the full range of HTTP methods. It enables converting POST requests to other methods such as PUT or DELETE. If a POST request comes with a different method specified in X-HTTP-Method-Override header, the filter will replace POST in the request with that specified method. This has been in Jersey for a while, but only supported method overriding using the X-HTTP-Method-Override header. In 1.9.1 you can now use “_method” query parameter as well, and when overriding POST to GET the filter will convert all the form parameters to query parameters. Whether both header and query parameter are looked at by the filter (or only the header or only the query parameter) is configurable. Thanks to gk5885Fredy Nagy and Florian Hars for sharing their views and patches.
You can see the full list of changes in our changelog. For more info on Jersey see

Jersey Hands-On Lab

September 16th, 2009

Earlier this year, me and Naresh created an introductory level Jersey hands-on lab for JavaOne ’09. As I realized just recently, the hands-on labs had been made available for download to all SDN members (free registration) shortly after JavaOne. It may be another useful resource for you to get started with Jersey. The lab provides detailed step-by-step instructions on how to set up your environment and then guides you through 3 exercises:

  1. Hello world! – leading you through your first JAX-RS/Jersey application, explaining the JAX-RS basics
  2. Advanced JAX-RS/Jersey Features – showing how to develop a little more complex web application using JAX-RS/Jersey features such as path parameters, multiple representations for a resource, writing your own MessageBodyReader/Writer, Jersey MVC and some more
  3. Using Jersey Client API – showing how to access web resources using the Client API provided by Jersey

You can download the Hands-On Lab as well as get more info here. I’ve also added this link to our Jersey Wiki. After you download the lab, just unzip the file and open index.html in restwebservice directory. The zip also contains solution directories for all three exercises. I hope the lab will be of help. Let me know in case you have any questions or feedback on it.