Changeset 219 for branches/eraser6/Manager/DirectExecutor.cs

Timestamp:

3/11/2008 5:32:30 AM (5 years ago)

Author:

lowjoel

Message:

Implemented time left for erasures.

File:

• branches/eraser6/Manager/DirectExecutor.cs (modified) (4 diffs)

branches/eraser6/Manager/DirectExecutor.cs

@@ -178 +178 @@
         private void EraseFilesystemObject(Task task, Task.FilesystemObject target)
         {
-            List<string> paths = target.GetPaths();
+            //Retrieve the list of files to erase.
+            long totalSize = 0;
+            List<string> paths = target.GetPaths(out totalSize);
             TaskProgressEventArgs eventArgs = new TaskProgressEventArgs(task, 0, 0);
 
@@ -185 +187 @@
             if (method == ErasureMethodManager.Default)
                 method = ErasureMethodManager.GetInstance(Globals.Settings.DefaultFileErasureMethod);
+
+            //Calculate the total amount of data required to finish the wipe. This
+            //value is just the total about of data to be erased multiplied by
+            //number of passes
+            totalSize *= method.Passes;
+
+            //Record the start of the erasure pass so we can calculate speed of erasures
+            long totalLeft = totalSize;
+            long overallWriteSpeed = 0;
+            DateTime startTime = DateTime.Now;
 
             //Iterate over every path, and erase the path.
@@ -230 +242 @@
                         delegate(float currentProgress, int currentPass)
                         {
+                            long amountWritten = (long)(currentProgress * (info.Length * method.Passes));
+                            if (overallWriteSpeed != 0)
+                                eventArgs.timeLeft = (int)((totalLeft - amountWritten) /
+                                    overallWriteSpeed);
+                            else if (amountWritten != 0 && (DateTime.Now - startTime).TotalSeconds != 0)
+                                overallWriteSpeed = (long)(amountWritten /
+                                    (DateTime.Now - startTime).TotalSeconds);
+
                             eventArgs.currentPass = currentPass;
                             eventArgs.currentItemProgress = (int)
@@ -239 +259 @@
                     );
 
+                    //Update the speed-influencing statistics.
+                    totalLeft -= info.Length * method.Passes;
+                    overallWriteSpeed = (long)((totalSize - totalLeft) /
+                        (DateTime.Now - startTime).TotalSeconds);
+
                     //Set the length of the file to 0.
                     strm.Seek(0, SeekOrigin.Begin);