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POJAX-RS and CDI / @Provider and beans.xml
 

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    <p>I made a simple project that makes use of JAX-RS (RESTfull service)</p> <p>I have a JAX-RS (RESTfull service) webservice project that deploys to JBoss AS 6.1. resteasy integrated with JSON is provided by JBoss 6.1 AS by default. I wanted to change the date format of the default JSON resource.</p> <p>I got some help from the Internet and added a class that extends <code>JacksonJsonProvider</code>:</p> <ul> <li><a href="https://stackoverflow.com/questions/8498413/accessing-jackson-object-mapper-in-resteasy">Accessing Jackson Object Mapper in RestEasy</a></li> <li><a href="https://stackoverflow.com/questions/4428109/jersey-jackson-json-date-serialization-format-problem-how-to-change-the-form">Jersey + Jackson JSON date format serialization - how to change the format or use custom JacksonJsonProvider</a></li> </ul> <pre class="lang-java prettyprint-override"><code>@Provider @Produces("application/json") public class MyJacksonJsonProvider extends JacksonJsonProvider { public static final String pattern = "YYYY-MM-dd'T'HH:mm:ss"; @Override public void writeTo(Object value, Class&lt;?&gt; type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap&lt;String,Object&gt; httpHeaders, OutputStream entityStream) throws IOException, WebApplicationException { ObjectMapper mapper = locateMapper(type, mediaType); // Set customized date format SimpleDateFormat sdf = new SimpleDateFormat(pattern); mapper.getSerializationConfig().setDateFormat(sdf); super.writeTo(value, type, genericType, annotations, mediaType, httpHeaders, entityStream); } } </code></pre> <p>This works well until I added an empty beans.xml under WebContent/WEB-INF for CDI injection.</p> <p><code>MyJacksonJsonProvider</code> doesn't get called and I still get the default JSON date format.</p> <p>Even adding the following dependency under pom.xml did not help:</p> <pre class="lang-xml prettyprint-override"><code>&lt;dependency&gt; &lt;groupId&gt;org.jboss.resteasy&lt;/groupId&gt; &lt;artifactId&gt;resteasy-jaxrs&lt;/artifactId&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.jboss.resteasy&lt;/groupId&gt; &lt;artifactId&gt;resteasy-cdi&lt;/artifactId&gt; &lt;version&gt;2.2.1.GA&lt;/version&gt; &lt;/dependency&gt; </code></pre> <p>Does anyone have any idea why <code>MyJacksonJsonProvider</code> is ignored if I have an empty beans.xml under "WebContent/WEB-INF" folder? Thanks a lot in advance!</p> <p>FYI, this is the sample model class:</p> <pre class="lang-java prettyprint-override"><code>@XmlRootElement(name = "movie") public class Movie { String name; String director; int year; Date date; @XmlElement public String getName() { return name; } public void setName(String name) { this.name = name; } @XmlElement public String getDirector() { return director; } public void setDirector(String director) { this.director = director; } @XmlAttribute public int getYear() { return year; } public void setYear(int year) { this.year = year; } @XmlElement public Date getDate() { return date; } public void setDate(Date date) { this.date = date; } } </code></pre> <p>And this is the class that produces JSON resource:</p> <pre class="lang-java prettyprint-override"><code>@Path("/json/movie") public class JSONService { @GET @Path("/get") @Produces("application/json") public Movie getMovieInJSON() { Movie movie = new Movie(); movie.setName("Little flower"); movie.setDirector("Zhang Zheng"); movie.setYear(1979); movie.setDate(new Date()); return movie; } } </code></pre>
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