Changed autorefresh to start at the end of initialization and check with if-modified...

diff --git a/src/gr/grnet/pithos/web/client/Pithos.java b/src/gr/grnet/pithos/web/client/Pithos.java
index 08a886e..fcf9fb2 100644 (file)
--- a/src/gr/grnet/pithos/web/client/Pithos.java
+++ b/src/gr/grnet/pithos/web/client/Pithos.java
@@ -55,11 +55,14 @@ import gr.grnet.pithos.web.client.rest.PutRequest;
 import gr.grnet.pithos.web.client.rest.RestException;
 
 import java.util.ArrayList;
+import java.util.Date;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Set;
 
+import org.apache.http.HttpStatus;
+
 import com.google.gwt.core.client.EntryPoint;
 import com.google.gwt.core.client.GWT;
 import com.google.gwt.core.client.JsArrayString;
@@ -76,7 +79,12 @@ import com.google.gwt.http.client.RequestCallback;
 import com.google.gwt.http.client.RequestException;
 import com.google.gwt.http.client.Response;
 import com.google.gwt.http.client.URL;
+import com.google.gwt.i18n.client.DateTimeFormat;
+import com.google.gwt.i18n.client.DateTimeFormat.PredefinedFormat;
 import com.google.gwt.i18n.client.Dictionary;
+import com.google.gwt.i18n.client.TimeZone;
+import com.google.gwt.i18n.client.TimeZoneInfo;
+import com.google.gwt.i18n.client.constants.TimeZoneConstants;
 import com.google.gwt.json.client.JSONArray;
 import com.google.gwt.json.client.JSONObject;
 import com.google.gwt.json.client.JSONParser;
@@ -295,6 +303,8 @@ public class Pithos implements EntryPoint, ResizeHandler {
     private FileUploadDialog fileUploadDialog = new FileUploadDialog(this);
 
        UploadAlert uploadAlert;
+       
+       Date lastModified;
 
        @Override
        public void onModuleLoad() {
@@ -303,6 +313,7 @@ public class Pithos implements EntryPoint, ResizeHandler {
        }
 
     private void initialize() {
+       lastModified = new Date(); //Initialize if-modified-since value with now.
        resources.pithosCss().ensureInjected();
        boolean bareContent = Window.Location.getParameter("noframe") != null;
        String contentWidth = bareContent ? "100%" : "75%";
@@ -487,21 +498,74 @@ public class Pithos implements EntryPoint, ResizeHandler {
                                });
             }
         });
-        
-//        Scheduler.get().scheduleFixedDelay(new RepeatingCommand() {
-//                     
-//                     @Override
-//                     public boolean execute() {
-//                             Folder f = getSelection();
-//                             if (f != null) {
-//                                     if (getSelectedTree().equals(folderTreeView))
-//                                             updateFolder(f, true, null, false);
-//                                     else if (getSelectedTree().equals(mysharedTreeView))
-//                                             updateSharedFolder(f, true);
-//                             }
-//                             return true;
-//                     }
-//             }, 3000);
+    }
+    
+    public void scheduleResfresh() {
+               Scheduler.get().scheduleFixedDelay(new RepeatingCommand() {
+                       
+                       @Override
+                       public boolean execute() {
+                               final Folder f = getSelection();
+                               if (f == null)
+                                       return true;
+                               
+                       HeadRequest<Folder> head = new HeadRequest<Folder>(Folder.class, getApiPath(), getUsername(), "/" + f.getContainer()) {
+
+                                       @Override
+                                       public void onSuccess(Folder _result) {
+                                               lastModified = new Date();
+                                               if (getSelectedTree().equals(folderTreeView))
+                                                       updateFolder(f, true, new Command() {
+       
+                                                               @Override
+                                                               public void execute() {
+                                                                       scheduleResfresh();
+                                                               }
+                                                               
+                                                       }, false);
+                                               else if (getSelectedTree().equals(mysharedTreeView))
+                                                       updateSharedFolder(f, true, new Command() {
+       
+                                                               @Override
+                                                               public void execute() {
+                                                                       scheduleResfresh();
+                                                               }
+                                                       });
+                                       }
+
+                                       @Override
+                                       public void onError(Throwable t) {
+                                               if (t instanceof RestException && ((RestException) t).getHttpStatusCode() == HttpStatus.SC_NOT_MODIFIED)
+                                                       scheduleResfresh();
+                                               else if (retries >= MAX_RETRIES) {
+                                       GWT.log("Error heading folder", t);
+                                                       setError(t);
+                                       if (t instanceof RestException)
+                                           displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
+                                       else
+                                           displayError("System error heading folder: " + t.getMessage());
+                               }
+                               else {//retry
+                                       GWT.log("Retry " + retries);
+                                       Scheduler.get().scheduleDeferred(this);
+                               }
+                                       }
+
+                                       @Override
+                                       protected void onUnauthorized(Response response) {
+                                               if (retries >= MAX_RETRIES)
+                                                       sessionExpired();
+                               else //retry
+                                       Scheduler.get().scheduleDeferred(this);
+                                       }
+                               };
+                               head.setHeader("X-Auth-Token", getToken());
+                               head.setHeader("If-Modified-Since", DateTimeFormat.getFormat("EEE, dd MMM yyyy HH:mm:ss").format(lastModified, TimeZone.createTimeZone(0)) + " GMT");
+                               Scheduler.get().scheduleDeferred(head);
+                               
+                               return false;
+                       }
+               }, 3000);
     }
 
     public void applyPermissions(Folder f) {
@@ -803,12 +867,14 @@ public class Pithos implements EntryPoint, ResizeHandler {
        }
 
        public static native void preventIESelection() /*-{
-               $doc.body.onselectstart = function () { return false; };
+               $doc.body.onselectstart = function() {
+                       return false;
+               };
        }-*/;
 
        public static native void enableIESelection() /*-{
                if ($doc.body.onselectstart != null)
-               $doc.body.onselectstart = null;
+                       $doc.body.onselectstart = null;
        }-*/;
 
        /**
@@ -1217,6 +1283,7 @@ public class Pithos implements EntryPoint, ResizeHandler {
                            otherSharedTreeView = new OtherSharedTreeView(otherSharedTreeViewModel);
                                trees.insert(otherSharedTreeView, 1);
                                treeViews.add(otherSharedTreeView);
+                               scheduleResfresh();
                        }
                });
        }