How to get jersey logs at server?

user_256717 0
Viewed 64639

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)
jersey java
5 Answers

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());
user_229820

Jersey 2 has deprecated LoggingFilter and you now need to use LoggingFeature. In order to use it with a client you can use the following snipette: 

this.client = ClientBuilder
            .newBuilder()
            .property(LoggingFeature.LOGGING_FEATURE_VERBOSITY_CLIENT, LoggingFeature.Verbosity.PAYLOAD_ANY)
            .property(LoggingFeature.LOGGING_FEATURE_LOGGER_LEVEL_CLIENT, "WARNING")
            .build();

and on the server side:

ResourceConfig config = new ResourceConfig(HelloWorldResource.class);
config.register(LoggingFeature.class);
user_3306170

Could you show us your client code and tell us about the request as well?

This exception seems to point at the JAXB unmarshalling step. Apparently you received some XML from your REST API, but you don't get what you're waiting for.

Maybe the XSD you're using for marshalling/unmarshalling is outdated or just plain wrong.
Maybe you're trying to get the wrong entity from the response.

Try these steps and give us some more details about your problem:

Get the XML from the response

Using a REST client like Client REST simple (a chrome extension), or your code:

Builder builder = webResource.path("/yourapi/").accept("application/xml");

// get the client response
ClientResponse response = builder.get(ClientResponse.class);

// log the HTTP Status
logger.log("HTTP Status: " + response.getStatus());

// bypass the jaxb step and get the full response
// MyResource myResource = response.getEntity(MyResource.class);
String myResource = response.getEntity(String.class);
logger.log(myResource);

Validate this XML with the XSD you're using

This test should fail (if I'm right).

user_229820
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