I have created a simple REST webservice and it returns a String value from Response. But browser givesan error and nothing shows from tomcat side.
Error shown in font end: This is basically generic error
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This page contains the following errors:
error on line 1 at column 1: Document is empty
Below is a rendering of the page up to the first error.
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below is the coding for my webservice
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@Path("/")
@WebService(name = "mailService", targetNamespace = "http://localhost/cxf-rest/example")
public interface MailService {
@GET
@Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
@Path("/testMail")
public Response sendTestMail(@QueryParam("env") String env);
}
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public class MailServiceImpl implements MailService {
@Override
public Response sendTestMail(String env) {
// TODO Auto-generated method stub
return Response.ok("good").build();
}
}
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below is the definitions for 'beans.xml"
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<jaxrs:server id="mailService" address="/mailservices">
<jaxrs:providers>
<bean class="org.codehaus.jackson.jaxrs.JacksonJsonProvider" />
</jaxrs:providers>
<jaxrs:serviceBeans>
<ref bean="mailServiceImpl" />
</jaxrs:serviceBeans>
<jaxrs:extensionMappings>
<entry key="xml" value="application/xml" />
<entry key="json" value="application/json" />
</jaxrs:extensionMappings>
</jaxrs:server>
<bean id="mailServiceImpl" class="com.rest.cxfrestservice.service.MailServiceImpl" />
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Reason
Jaxb does not know how to convert String to Json.
you have few solutions
Solution 1:
change response type to "text/plain"
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@Path("/")
@WebService(name = "mailService", targetNamespace = "http://localhost/cxf-rest/example")
public interface MailService {
@GET
@Produces("text/plain")
@Path("/testMail")
public Response sendTestMail(@QueryParam("env") String env);
}
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this will solve the error. But output will be a plain text.
Solution 2 :
Use wrapper
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@XmlRootElement(name = "statusMessage")
public class StatusMessage {
private String message;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
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new Service Impl class
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@Path("/")
@WebService(name = "mailService", targetNamespace = "http://localhost/cxf-rest/example")
public interface MailService {
@GET
@Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
@Path("/sendMail")
public Response sendRefreshMail(@QueryParam("env") String env);
}
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public class MailServiceImpl implements MailService {
public Response sendRefreshMail(String env) {
if (env == null) {
return Response.status(Response.Status.BAD_REQUEST).build();
}
StatusMessage statusMessage = new StatusMessage();
statusMessage.setMessage(mailSao.sendEmail(env));
return Response.ok(
statusMessage).build();
}
}
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This will return response as needed. below is xml output
<statusMessage>
<message>SUCCESS</message>
</statusMessage>
below link is a good one
