On 13/09/12 07:54, Koen Van Leuvenhaege wrote:
Hi,
thanks for your feedback.
The HTTP Accept does contain application/json.
I wrote a small client with Apache Http client and set the Accept header
explicitly.
Also, the server log shows this.
Can you please let me one thing before I start debugging:
In how far is JAXB config needed in order to use JSON?
It is not needed if the default JSONProvider is used.
You can also register Jackson JAXB-aware provider,
org.codehaus.jackson.jaxrs.JacksonJaxbJsonProvider,
Cheers, Sergey
kind regards
Koen
2012/9/12 Sergey Beryozkin<[email protected]>
Hi
On 12/09/12 19:16, Koen Van Leuvenhaege wrote:
Hi,
I'm trying to make a simple example work JAXRS example work, as described
below, but I do it using CXF-DOSGI.
(on Equinox, using declarative services)
However, no matter how I configure my service, I always get a message:
12-sep-2012 15:27:42 org.apache.cxf.jaxrs.**interceptor.**JAXRSOutInterceptor
writeResponseErrorMessage
WARNING: No message body writer has been found for response class
ElectriciteitsMeterStand.
(class ElectriciteitsMeterStand is a simple POJO that is returned by one
of my methods, see code below)
There must be something I'm overlooking, could you give any advice to
help me solve this problem?
Code:
Service declaration in dOSGI:
<?xml version="1.0" encoding="UTF-8"?>
<scr:component
xmlns:scr="http://www.osgi.**org/xmlns/scr/v1.1.0<http://www.osgi.org/xmlns/scr/v1.1.0>"
immediate="false" name="EenvoudigeMeterOpname">
<implementation class="projectone.**MeterOpnameImpl" />
<property name="service.exported.**interfaces" value="*" />
<!-- property name="service.exported.**configs" value="
org.apache.cxf.ws" / -->
<!-- property name="org.apache.cxf.ws.**address" value="
http://localhost:9090/**ws/meteropname<http://localhost:9090/ws/meteropname>"
/ -->
<property name="service.exported.**configs" value="org.apache.cxf.rs"
/>
<property name="org.apache.cxf.rs.**provider.expected" value="true" />
<property name="org.apache.cxf.rs.**provider"
value="org.apache.cxf.jaxrs.**provider.JSONProvider" />
<!-- property name="service.exported.**intents" value="HTTP" / -->
<!-- property name="org.apache.cxf.rs.**databinding" value="jaxb" /
-->
<service>
<provide interface="projectone.**MeterOpname"/>
</service>
</scr:component>
I've seen a few reports the default JSONProvider (and only JSONProvider)
can not be used in some cases though I recall Angelo Zerr shown the
configuration on this list on how JSONProvider can be set up and customized
and it all worked, but I think it was done in Blueprint or Spring.
The provider does not even have to be explicitly listed, something in
(CXF) JSONUtils breaks...
Can you also check HTTP Accept does contain application/json ?
If not then I'd appreciate if you could debug it, I can help with setting
it all up if you get a chance...
Cheers, Sergey
Service interface:
package projectone;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.xml.bind.annotation.**XmlRootElement;
@Path("/rs")
@XmlRootElement
public interface MeterOpname {
/**
* Returns the gas meter stand
*
* @return the gas meter stand
*/
@GET
@Path("getgas")
@Produces({"application/json", "text/xml"})
public String getGas();
/**
* Returns the water meter stand
*
* @return the water meter stand
*/
@GET
@Path("getwater")
@Produces({"application/json", "text/xml"})
public String getWater();
/**
* Returns the electriciteit meter stand
*
* @return the electriciteit meter stand
*/
@GET
@Path("getelectriciteit")
@Produces({"application/json", "text/xml"})
public ElectriciteitsMeterStand getElectriciteit();
}
Service Implementation:
package projectone;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.xml.bind.annotation.**XmlRootElement;
public class MeterOpnameImpl implements MeterOpname {
public String getGas() {
return toHtml(currentMethodName(), 10L);
}
public String getWater() {
return toHtml(currentMethodName(), 100L);
}
public ElectriciteitsMeterStand getElectriciteit() {
ElectriciteitsMeterStand result = new
ElectriciteitsMeterStand();
result.setDalVerbruik(50L);
result.setPiekVerbruik(150L);
return result;
}
private String toHtml(String title, Long value) {
return "<html><header></header><body>**<h1>" + title
+"</h1><p>" + value +"</p></body></html>";
}
private String currentMethodName() {
StackTraceElement[] stacktrace = Thread.currentThread().*
*getStackTrace();
StackTraceElement e = stacktrace[2];//coz 0th will be
getStackTrace so 1st
return e.getMethodName();
}
}
Return POJO:
package projectone;
import javax.ws.rs.Produces;
import javax.xml.bind.annotation.**XmlRootElement;
@Produces({"application/json", "text/xml"})
@XmlRootElement
public class ElectriciteitsMeterStand {
public ElectriciteitsMeterStand() {
}
private Long piekVerbruik;
private Long dalVerbruik;
public Long getPiekVerbruik() {
return piekVerbruik;
}
public void setPiekVerbruik(Long piekVerbruik) {
this.piekVerbruik = piekVerbruik;
}
public Long getDalVerbruik() {
return dalVerbruik;
}
public void setDalVerbruik(Long dalVerbruik) {
this.dalVerbruik = dalVerbruik;
}
}
Thanks in advance!
kind regards
Koen Van Leuvenhaege
