Question

I am using jersey for a REST WS. How do I enable jersey logs at server side?

Long story:
I get a clientside exception – but I don’t see anything in tomcat logs [It doesn’t even reach my method]. Since the stack trace is saying “toReturnValue” it did get something from server. But I don’t know what the server said.

Exception in thread "main" java.lang.IllegalArgumentException: source parameter must not be null
 at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:98)
        at com.sun.xml.internal.ws.message.AbstractMessageImpl.readPayloadAsJAXB(AbstractMessageImpl.java:100)
        **at com.sun.xml.internal.ws.client.dispatch.JAXBDispatch.toReturnValue(JAXBDispatch.java:74)**
        at com.sun.xml.internal.ws.client.dispatch.DispatchImpl.doInvoke(DispatchImpl.java:191)
        at com.sun.xml.internal.ws.client.dispatch.DispatchImpl.invoke(DispatchImpl.java:195)

Answer 1

If you want to turn on logging on the server side, you need to register the LoggingFilter Jersey filter (on the container side).

This filter will log request/response headers and entities.

Here’s what you need to add to your ResourceConfig class:

@ApplicationPath("/")
public class MyApplication extends ResourceConfig {

    public MyApplication() {
        // Resources.
        packages(MyResource.class.getPackage().getName());

        register(LoggingFilter.class);    
    }
}

Note that the same filter also works on the client side.

Client client = Client.create();
client.addFilter(new LoggingFilter());