CODEWITHSUNDEEP
gwt
user2239251
user2239251

Reputation: 51

this.getThreadLocalRequest() returns null in GWT

I am always getting null when I call getThreadLocalRequest() method in servlet (which extends RemoteServiceServlet).

public class UPS_LpnListRPCServiceImpl 
    extends RemoteServiceServlet 
    implements IUPS_LpnRPCService {

    @Override
    public String getUserInfoFromHeader() {
        LOGGER.debug(" getUserInfoFromHeader: ");
        HttpServletRequest req = this.getThreadLocalRequest();

        if (req != null) {
            //HttpSession session = req.getSession();
            remote_user = req.getHeader("ct-remote-user");

            LOGGER.debug("req != null");
        } else {
            remote_user = "";

            LOGGER.debug("req == null");
        }

        LOGGER.debug(" getUserInfoFromHeader: remote_user = " + remote_user);
        return remote_user;
    }
}

Calling in other place:

IUPS_LpnRPCServiceAsync service = GWT.create(IUPS_LpnRPCService.class);

service.getUserInfoFromHeader(new AsyncCallbackSupport<String>(false) {

    @Override
    public void onSuccess(String remote_user) {             
        GWT.log("getting remote call");
        defaultMainScreen.setUsername(remote_user);
        GWT.log("remote_user = " + remote_user);
    }       
});

Upvotes: 3

Views: 2472

Answers (2)

bnguimgo
bnguimgo

Reputation: 1

Do not forget to add the following configuration to the web.xml in order to maintain the HttpSession, otherwise you will have and IllegalStateException:

<listener>  
  <listener-class>  
    org.springframework.web.context.request.RequestContextListener  
  </listener-class>  
</listener>

Upvotes: 0

user2239251
user2239251

Reputation: 51

If you want to access the HttpServletRequest object you can use the below code snippet:

import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

public class UPS_LpnListRPCServiceImpl extends RemoteServiceServlet implements
        IUPS_LpnRPCService {

...........
...........

public String getUserInfoFromHeader() {
  ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes();
  if (requestAttributes != null) {
       HttpServletRequest req = requestAttributes.getRequest();
       remote_user = req.getSession().getAttribute("j_username").toString();
  }

}


.........

}

Upvotes: 1

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