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Posted to users@cxf.apache.org by Pankaj Jangid <pa...@gmail.com> on 2011/06/14 18:17:58 UTC
No message body writer has been found for response class HashMap.
I am new to CXF.
I want to GET result as JSON. My getCustomer() resource method is like this
@Path("/")
@Produces("application/json,application/xml")
public class Service
{
@GET
@Path("/getCustomers")
public String getCustomers() {
HashMap hm = new HashMap();
hm.put("Hello", "World");
return hm;
}
my bean.xml (which is referenced in web.xml is
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jaxrs="http://cxf.apache.org/jaxrs"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://cxf.apache.org/jaxrs
http://cxf.apache.org/schemas/jaxrs.xsd">
<import resource="classpath:META-INF/cxf/cxf.xml" />
<import resource="classpath:META-INF/cxf/cxf-servlet.xml" />
<jaxrs:server id="rest-api" address="/myservice">
<jaxrs:serviceBeans>
<ref bean="serviceBean"/>
</jaxrs:serviceBeans>
<jaxrs:extensionMappings>
<entry key="json" value="application/json"/>
<entry key="xml" value="application/xml"/>
</jaxrs:extensionMappings>
<jaxrs:providers>
<ref bean="jaxbProvider"/>
<ref bean="jsonProvider"/>
</jaxrs:providers>
</jaxrs:server>
<bean id="serviceBean"
class="my.Service"/>
<bean id="jaxbProvider"
class="org.apache.cxf.jaxrs.provider.JAXBElementProvider"/>
<bean id="jsonProvider"
class="org.apache.cxf.jaxrs.provider.JSONProvider"/>
</beans>
When I access the service it produces this message:-
No message body writer has been found for response class HashMap.
--
Regards
Pankaj
Re: No message body writer has been found for response class HashMap.
Posted by Sergey Beryozkin <sb...@gmail.com>.
This is because multiple media types should be specified like this:
@Produces({"application/json","application/xml"})
@Consumes({"application/json","application/xml"})
Cheers, Sergey
On Wed, Jun 15, 2011 at 4:52 PM, Pankaj Jangid <pa...@gmail.com> wrote:
> Changed the service class to:
>
>
> @Path("/")
> @Produces("application/json,application/xml")
> @Consumes("application/json,application/xml")
> public class Service
> {
> @GET
> @Path("/getCustomer")
> public JAXBElement<GreetingListType> getCustomer() {
> ObjectFactory of = new ObjectFactory();
> GreetingListType grList = of.createGreetingListType();
> GreetingType g = of.createGreetingType();
> g.setText("Hello World");
> g.setLanguage("en");
> grList.getGreeting().add(g);
> JAXBElement<GreetingListType> gl = of.createGreetings( grList );
> return gl;
> }
>
> It is now producing this message:
>
> No message body writer has been found for response class JAXBElement.
>
>
> --
> Regards
> Pankaj
>
> On 14 June 2011 22:14, Sergey Beryozkin <sb...@gmail.com> wrote:
>
>> I'd recommend you avoid returning Map directly and wrap it inside
>> custom JAXB bean,
>> Otherwise you need to add XmlJavaTypeAdaper. May be Jackson can handle
>> Map directly - not sure about it
>> Cheers, Sergey
>>
>> On Tue, Jun 14, 2011 at 5:17 PM, Pankaj Jangid <pa...@gmail.com>
>> wrote:
>> > I am new to CXF.
>> > I want to GET result as JSON. My getCustomer() resource method is like
>> this
>> >
>> > @Path("/")
>> > @Produces("application/json,application/xml")
>> > public class Service
>> > {
>> > @GET
>> > @Path("/getCustomers")
>> > public String getCustomers() {
>> > HashMap hm = new HashMap();
>> > hm.put("Hello", "World");
>> > return hm;
>> > }
>> >
>> > my bean.xml (which is referenced in web.xml is
>> >
>> > <beans xmlns="http://www.springframework.org/schema/beans"
>> > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>> > xmlns:jaxrs="http://cxf.apache.org/jaxrs"
>> > xsi:schemaLocation="
>> > http://www.springframework.org/schema/beans
>> > http://www.springframework.org/schema/beans/spring-beans.xsd
>> > http://cxf.apache.org/jaxrs
>> > http://cxf.apache.org/schemas/jaxrs.xsd">
>> >
>> > <import resource="classpath:META-INF/cxf/cxf.xml" />
>> > <import resource="classpath:META-INF/cxf/cxf-servlet.xml" />
>> >
>> > <jaxrs:server id="rest-api" address="/myservice">
>> > <jaxrs:serviceBeans>
>> > <ref bean="serviceBean"/>
>> > </jaxrs:serviceBeans>
>> > <jaxrs:extensionMappings>
>> > <entry key="json" value="application/json"/>
>> > <entry key="xml" value="application/xml"/>
>> > </jaxrs:extensionMappings>
>> > <jaxrs:providers>
>> > <ref bean="jaxbProvider"/>
>> > <ref bean="jsonProvider"/>
>> > </jaxrs:providers>
>> > </jaxrs:server>
>> >
>> > <bean id="serviceBean"
>> > class="my.Service"/>
>> > <bean id="jaxbProvider"
>> > class="org.apache.cxf.jaxrs.provider.JAXBElementProvider"/>
>> > <bean id="jsonProvider"
>> > class="org.apache.cxf.jaxrs.provider.JSONProvider"/>
>> >
>> > </beans>
>> >
>> > When I access the service it produces this message:-
>> >
>> > No message body writer has been found for response class HashMap.
>> >
>> > --
>> > Regards
>> > Pankaj
>> >
>>
>
--
Sergey Beryozkin
Application Integration Division of Talend
http://sberyozkin.blogspot.com
Re: No message body writer has been found for response class HashMap.
Posted by Pankaj Jangid <pa...@gmail.com>.
Changed the service class to:
@Path("/")
@Produces("application/json,application/xml")
@Consumes("application/json,application/xml")
public class Service
{
@GET
@Path("/getCustomer")
public JAXBElement<GreetingListType> getCustomer() {
ObjectFactory of = new ObjectFactory();
GreetingListType grList = of.createGreetingListType();
GreetingType g = of.createGreetingType();
g.setText("Hello World");
g.setLanguage("en");
grList.getGreeting().add(g);
JAXBElement<GreetingListType> gl = of.createGreetings( grList );
return gl;
}
It is now producing this message:
No message body writer has been found for response class JAXBElement.
--
Regards
Pankaj
On 14 June 2011 22:14, Sergey Beryozkin <sb...@gmail.com> wrote:
> I'd recommend you avoid returning Map directly and wrap it inside
> custom JAXB bean,
> Otherwise you need to add XmlJavaTypeAdaper. May be Jackson can handle
> Map directly - not sure about it
> Cheers, Sergey
>
> On Tue, Jun 14, 2011 at 5:17 PM, Pankaj Jangid <pa...@gmail.com>
> wrote:
> > I am new to CXF.
> > I want to GET result as JSON. My getCustomer() resource method is like
> this
> >
> > @Path("/")
> > @Produces("application/json,application/xml")
> > public class Service
> > {
> > @GET
> > @Path("/getCustomers")
> > public String getCustomers() {
> > HashMap hm = new HashMap();
> > hm.put("Hello", "World");
> > return hm;
> > }
> >
> > my bean.xml (which is referenced in web.xml is
> >
> > <beans xmlns="http://www.springframework.org/schema/beans"
> > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> > xmlns:jaxrs="http://cxf.apache.org/jaxrs"
> > xsi:schemaLocation="
> > http://www.springframework.org/schema/beans
> > http://www.springframework.org/schema/beans/spring-beans.xsd
> > http://cxf.apache.org/jaxrs
> > http://cxf.apache.org/schemas/jaxrs.xsd">
> >
> > <import resource="classpath:META-INF/cxf/cxf.xml" />
> > <import resource="classpath:META-INF/cxf/cxf-servlet.xml" />
> >
> > <jaxrs:server id="rest-api" address="/myservice">
> > <jaxrs:serviceBeans>
> > <ref bean="serviceBean"/>
> > </jaxrs:serviceBeans>
> > <jaxrs:extensionMappings>
> > <entry key="json" value="application/json"/>
> > <entry key="xml" value="application/xml"/>
> > </jaxrs:extensionMappings>
> > <jaxrs:providers>
> > <ref bean="jaxbProvider"/>
> > <ref bean="jsonProvider"/>
> > </jaxrs:providers>
> > </jaxrs:server>
> >
> > <bean id="serviceBean"
> > class="my.Service"/>
> > <bean id="jaxbProvider"
> > class="org.apache.cxf.jaxrs.provider.JAXBElementProvider"/>
> > <bean id="jsonProvider"
> > class="org.apache.cxf.jaxrs.provider.JSONProvider"/>
> >
> > </beans>
> >
> > When I access the service it produces this message:-
> >
> > No message body writer has been found for response class HashMap.
> >
> > --
> > Regards
> > Pankaj
> >
>
Re: No message body writer has been found for response class HashMap.
Posted by Sergey Beryozkin <sb...@gmail.com>.
I'd recommend you avoid returning Map directly and wrap it inside
custom JAXB bean,
Otherwise you need to add XmlJavaTypeAdaper. May be Jackson can handle
Map directly - not sure about it
Cheers, Sergey
On Tue, Jun 14, 2011 at 5:17 PM, Pankaj Jangid <pa...@gmail.com> wrote:
> I am new to CXF.
> I want to GET result as JSON. My getCustomer() resource method is like this
>
> @Path("/")
> @Produces("application/json,application/xml")
> public class Service
> {
> @GET
> @Path("/getCustomers")
> public String getCustomers() {
> HashMap hm = new HashMap();
> hm.put("Hello", "World");
> return hm;
> }
>
> my bean.xml (which is referenced in web.xml is
>
> <beans xmlns="http://www.springframework.org/schema/beans"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xmlns:jaxrs="http://cxf.apache.org/jaxrs"
> xsi:schemaLocation="
> http://www.springframework.org/schema/beans
> http://www.springframework.org/schema/beans/spring-beans.xsd
> http://cxf.apache.org/jaxrs
> http://cxf.apache.org/schemas/jaxrs.xsd">
>
> <import resource="classpath:META-INF/cxf/cxf.xml" />
> <import resource="classpath:META-INF/cxf/cxf-servlet.xml" />
>
> <jaxrs:server id="rest-api" address="/myservice">
> <jaxrs:serviceBeans>
> <ref bean="serviceBean"/>
> </jaxrs:serviceBeans>
> <jaxrs:extensionMappings>
> <entry key="json" value="application/json"/>
> <entry key="xml" value="application/xml"/>
> </jaxrs:extensionMappings>
> <jaxrs:providers>
> <ref bean="jaxbProvider"/>
> <ref bean="jsonProvider"/>
> </jaxrs:providers>
> </jaxrs:server>
>
> <bean id="serviceBean"
> class="my.Service"/>
> <bean id="jaxbProvider"
> class="org.apache.cxf.jaxrs.provider.JAXBElementProvider"/>
> <bean id="jsonProvider"
> class="org.apache.cxf.jaxrs.provider.JSONProvider"/>
>
> </beans>
>
> When I access the service it produces this message:-
>
> No message body writer has been found for response class HashMap.
>
> --
> Regards
> Pankaj
>