--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/server/UserServiceImpl.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,71 @@
+package org.dive4elements.river.client.server;
+
+import javax.servlet.http.HttpSession;
+
+import org.w3c.dom.Element;
+
+import org.apache.log4j.Logger;
+
+import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
+
+import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException;
+
+import org.dive4elements.river.client.client.services.UserService;
+import org.dive4elements.river.client.server.auth.UserClient;
+import org.dive4elements.river.client.shared.exceptions.AuthenticationException;
+import org.dive4elements.river.client.shared.model.DefaultUser;
+import org.dive4elements.river.client.shared.model.User;
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class UserServiceImpl
+extends      RemoteServiceServlet
+implements   UserService
+{
+    /** Private logger. */
+    private static final Logger logger = Logger.getLogger(UserServiceImpl.class);
+
+    public static final String ERROR_NO_SUCH_USER = "error_no_such_user";
+
+    public static final String ERROR_NO_USERS = "error_no_users";
+
+    public User getCurrentUser(String locale)
+    throws AuthenticationException
+    {
+        String url = getServletContext().getInitParameter("server-url");
+
+        UserClient client = new UserClient(url);
+        org.dive4elements.river.client.server.auth.User loginuser = getUser();
+
+        if (loginuser == null) {
+            logger.debug("no session user");
+            throw new AuthenticationException(ERROR_NO_SUCH_USER);
+        }
+
+        try {
+            Element user = client.findUser(loginuser);
+
+            if (user != null) {
+                String uuid = user.getAttributeNS(
+                        ArtifactNamespaceContext.NAMESPACE_URI, "uuid");
+                String name = user.getAttributeNS(
+                        ArtifactNamespaceContext.NAMESPACE_URI, "name");
+
+                return new DefaultUser(uuid, name);
+            }
+        }
+        catch (ConnectionException ce) {
+            logger.error(ce, ce);
+        }
+
+        logger.error("No users existing in the server.");
+        throw new AuthenticationException(ERROR_NO_USERS);
+    }
+
+    public void logoutCurrentUser() {
+        HttpSession session = this.getThreadLocalRequest().getSession();
+        session.setAttribute("user", null);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :