CODEWITHSUNDEEP
javajsonjerseyjetty
Ben Zuill-Smith
Ben Zuill-Smith

Reputation: 3822

Setting up Jax-rs 2.2 with Jetty

I'm trying to set up some REST services on Jetty using Jersey JAXRS. I can't get json data through to my REST service class though. My ajax requests keep getting the "Unsupported Media Type" error and status. I get this regardless of what @Produces and @Consumes annotations I add to my methods though they should both be MediaType.APPLICATION_JSON.

I can't find decent documentation on Jersey and the loads of questions, blogs, and other resources all seem to be out of date. Looks like Jersey has undergone a lot of changes recently and I'm at a loss as to where I should be looking. I set up the following based on the jersey webapp archetype:

web.xml:

<servlet>
    <servlet-name>Jersey Web Application</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>jersey.config.server.provider.packages</param-name>
        <param-value>com.my.package.rest</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>Jersey Web Application</servlet-name>
    <url-pattern>/rest/*</url-pattern>
</servlet-mapping>

Code snippet:

@Path("/users")
public class UserService {

    // Plain text works!
    @GET
    @Consumes(MediaType.TEXT_PLAIN)
    public String list(){
        return "Got it!";
    }

    // JSON doesn't work! >:(
    @POST
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    public User create(User user) {
        Mocks.USERS.add(user);
        return user;
    }

My parent pom manages these dependencies ahd the second of these two is a dependency in my jax-rs project pom.

<dependency>
    <groupId>org.glassfish.jersey</groupId>
    <artifactId>jersey-bom</artifactId>
    <version>2.2</version>
    <type>pom</type>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-servlet-core</artifactId>
    <version>2.2</version>
</dependency>

Do I need something to add support for JSON?

Upvotes: 2

Views: 4225

Answers (3)

Grigory Kislin
Grigory Kislin

Reputation: 18000

JSON start working for me just with 2 dependencies:

    <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet</artifactId>
        <version>2.3</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.jaxrs</groupId>
        <artifactId>jackson-jaxrs-json-provider</artifactId>
        <version>2.2.3</version>
    </dependency>

Upvotes: 0

Ben Zuill-Smith
Ben Zuill-Smith

Reputation: 3822

Seems Drew was on the right track in his comment. But the answer (for Jersey 2.2 + Jackson at least) was a more up-to-date provider

<dependency>
  <groupId>com.fasterxml.jackson.jaxrs</groupId>
  <artifactId>jackson-jaxrs-json-provider</artifactId>
  <version>2.2.3</version>
</dependency>

Using this required no configuration. Use this with the two dependencies in the original questions and you're in business.

Upvotes: 1

Michal Gajdos
Michal Gajdos

Reputation: 10379

Have you read a chapter dedicated to JSON in the Users Guide? The easiest way would be adding a dependency on MOXy and JSON support would work out-of-the-box (you don't need to explicitly register features the modules provides to make it work as opposed to other JSON modules in Jersey):

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-moxy</artifactId>
    <version>2.2</version>
</dependency>

Anyways Jersey provides more modules that would help you with handling JSON media type:

Upvotes: 2

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