Do I make something wrong using JAXB based JSON support with the Jersey 1.17 Client API?
The code below delivers
415
[text/html;charset=utf-8]
Mai 01, 2013 8:23:30 AM com.sun.jersey.api.client.ClientResponse getEntity
SEVERE: A message body reader for Java class client.Pair, and Java type class client.Pair, and MIME media type text/html; charset=utf-8 was not found
Mai 01, 2013 8:23:30 AM com.sun.jersey.api.client.ClientResponse getEntity
SEVERE: The registered message body readers compatible with the MIME media type are:
*/* ->
com.sun.jersey.core.impl.provider.entity.FormProvider
com.sun.jersey.core.impl.provider.entity.StringProvider
com.sun.jersey.core.impl.provider.entity.ByteArrayProvider
com.sun.jersey.core.impl.provider.entity.FileProvider
com.sun.jersey.core.impl.provider.entity.InputStreamProvider
com.sun.jersey.core.impl.provider.entity.DataSourceProvider
com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General
com.sun.jersey.core.impl.provider.entity.ReaderProvider
com.sun.jersey.core.impl.provider.entity.DocumentProvider
com.sun.jersey.core.impl.provider.entity.SourceProvider$StreamSourceReader
com.sun.jersey.core.impl.provider.entity.SourceProvider$SAXSourceReader
com.sun.jersey.core.impl.provider.entity.SourceProvider$DOMSourceReader
com.sun.jersey.json.impl.provider.entity.JSONJAXBElementProvider$General
com.sun.jersey.json.impl.provider.entity.JSONArrayProvider$General
com.sun.jersey.json.impl.provider.entity.JSONObjectProvider$General
com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$General
com.sun.jersey.core.impl.provider.entity.EntityHolderReader
com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider$General
com.sun.jersey.json.impl.provider.entity.JSONListElementProvider$General
com.sun.jersey.json.impl.provider.entity.JacksonProviderProxy
Exception in thread "main" com.sun.jersey.api.client.ClientHandlerException: A message body reader for Java class client.Pair, and Java type class client.Pair, and MIME media type text/html; charset=utf-8 was not found
at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:561)
at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:517)
at client.ComputeConcat.main(ComputeConcat.java:39)
package server;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
/**
*
* calling with data as JSON serialization
* $ curl -X POST --data-binary "{ \"first\":\"Hello, \", \"second\":\"World.\" }" \
* -H "Content-Type: application/json" -H "Accept: application/json" \
* --user exampleuser:changeit \
* http://localhost:8080/JAXRSServer/rs/concatEngine/concat
* delivers
* { "first":"Hello, World." }
*/
@Path("/concatEngine")
public class ConcatEngine {
@POST
@Path("/concat")
// MediaType.APPLICATION_XML,
@Consumes({MediaType.APPLICATION_JSON})
@Produces({MediaType.APPLICATION_JSON})
public Pair concat(Pair data) {
Pair res = new Pair();
res.setFirst(data.getFirst() + data.getSecond());
return res;
}
}
package server;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
@XmlAccessorType(XmlAccessType.PROPERTY)
public class Pair {
protected String first;
protected String second;
public Pair() {
}
public String getFirst() {
return first;
}
public void setFirst(String first) {
this.first = first;
}
public String getSecond() {
return second;
}
public void setSecond(String second) {
this.second = second;
}
}
package client;
import javax.ws.rs.core.MediaType;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;
public class ComputeConcat {
private static WebResource getHttpResource() {
ClientConfig config = new DefaultClientConfig();
// config.getFeatures().put(JSONConfiguration.FEATURE_POJO_MAPPING, Boolean.TRUE);
// config.getClasses().add(JSONRootElementProvider.class);
Client client = Client.create(config);
return client.resource(
"http://localhost:8080/JAXRSServer/rs/concatEngine/concat");
}
public static void main(String[] args) {
Pair pair = new Pair();
pair.setFirst("Hello, "); pair.setSecond("World!");
WebResource resource = getHttpResource();
// resource.accept(MediaType.APPLICATION_XML);
resource.accept(MediaType.APPLICATION_JSON);
resource.type(MediaType.APPLICATION_JSON);
// resource.header("content-type", MediaType.APPLICATION_JSON);
ClientResponse response = resource.post(ClientResponse.class, pair);
System.out.println(response.getStatus());
System.out.println(response.getHeaders().get("Content-Type"));
Pair res = response.getEntity(Pair.class);
System.out.println(res.getFirst());
}
}
My web.xml (under Tomcat) if that should be of interest:
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="3.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name>JAXRSServer</display-name>
<servlet>
<servlet-name>Jersey REST Service</servlet-name>
<servlet-class>
com.sun.jersey.spi.container.servlet.ServletContainer
</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>server</param-value>
</init-param>
<!-- init-param>
<param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
<param-value>true</param-value>
</init-param -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey REST Service</servlet-name>
<url-pattern>/rs/*</url-pattern>
</servlet-mapping>
</web-app>
If changing @Consumes({MediaType.APPLICATION_JSON}) to @Consumes({MediaType.APPLICATION_XML}) for the concat method, then the code operates. However, the input pair is sent as XML and not as JSON serialization. It seems like the Jersy Client does not automatically serialize the pair object to JSON but only to XML, although imho it should.
Any ideas? Thank you!