--- a/flys-client/src/main/java/de/intevation/flys/client/server/DoCollectionAction.java	Tue Oct 25 11:07:14 2011 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/server/DoCollectionAction.java	Tue Oct 25 12:31:15 2011 +0000
@@ -2,6 +2,8 @@
 
 import org.w3c.dom.Document;
 
+import org.apache.log4j.Logger;
+
 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
 
 import de.intevation.artifacts.common.ArtifactNamespaceContext;
@@ -21,6 +23,10 @@
  */
 public class DoCollectionAction extends RemoteServiceServlet {
 
+    private static final Logger logger =
+        Logger.getLogger(DoCollectionAction.class);
+
+
     public static final String XPATH_RESULT      = "/art:result/text()";
     public static final String OPERATION_FAILURE = "FAILED";
     public static final String FAILURE_EXCEPTION = "collection_action_failed";
@@ -29,6 +35,8 @@
     protected void doAction(Collection c, Document action, String url)
     throws    ServerException
     {
+        logger.info("DoCollectionAction.doAction");
+
         HttpClient client = new HttpClientImpl(url);
 
         try {
@@ -42,12 +50,12 @@
                 ArtifactNamespaceContext.INSTANCE);
 
             if (result == null || result.equals(OPERATION_FAILURE)) {
-                System.err.println("Operation failed.");
+                logger.error("Operation failed.");
                 throw new ServerException(FAILURE_EXCEPTION);
             }
         }
         catch (ConnectionException ce) {
-            System.err.println(ce.getLocalizedMessage());
+            logger.error(ce, ce);
             throw new ServerException(FAILURE_EXCEPTION);
         }
     }