File Copy with resume enable

I am thinking of making a file copy program like the download managers, which provides resume enables, so that users can continue at later times.
Suppose, i have a 10 GB file, and i want to transfer it over to my external, then instead of non breakable file copying, user get the option to stop, and resume laters from that point only.
I am not sure if its feasible in java, but if its, please tell me how to achieve that.
I am not asking you to give me the code, rather a bit about how to proceed in that direction.
Thank you.

user7761515 wrote:
I am thinking of making a file copy program like the download managers, which provides resume enables, so that users can continue at later times.Well, I suspect you're going to have to come up with some sort of protocol that allows your copy job to complete its task (eg, a separate file containing the number of bytes written to the "partial" so that it knows where to resume from). I'd also suggest that you use some sort of name extension to distinguish your partial from a completed file, and only rename it when you know the job is finished.
Alternatively, you could create "chunks" for each portion copied between a start/resume and the next pause (maybe with numbered extensions) and then concatenate them together as a final step (possibly simpler, but likely less efficient in space and time).
Another thing to think about is changes: What if someone changes the file you want to copy between the time you pause and the time you resume? I suspect it should invalidate the whole job, but you'll probably want to check modification times (or alternatively, use a checksum) before you resume.
If this is just an exercise, great; otherwise I suspect you may be re-inventing the wheel.
Winston
Edited by: YoungWinston on Nov 13, 2010 12:02 PM
It also occurs to me that you might want to investigate FTP. I'm pretty sure it has hooks for pausing and resuming, but you'll probably have to check if the Java library you choose allows that capability.

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File copy with change of file type

I'm currently working on what seems like a simple file-to-file scenario. A file (without an extension) on server A has to be copied to server B. The name of the file on the target server should be the same as the file on the source system. Only change is that the file on the target system should get a .txt extension. After trying various options I'm stuck on the .txt extension.
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Does anyone know what I might be doing wrong here?
Edited by: Cheese2 on Jul 15, 2009 12:39 PM

use dynamic configuration. you can manipulate the file names very easily - /people/shabarish.vijayakumar/blog/2009/03/26/dynamic-configuration-vs-variable-substitution--the-ultimate-battle-for-the-file-name
/people/michal.krawczyk2/blog/2005/11/10/xi-the-same-filename-from-a-sender-to-a-receiver-file-adapter--sp14 - in your case as per this blog all you need to change in the code will be;
DynamicConfiguration conf = (DynamicConfiguration) container.getTransformationParameters().get(StreamTransformationConstants.DYNAMIC_CONFIGURATION);
DynamicConfigurationKey key = DynamicConfigurationKey.create("http://sap.com/xi/XI/System/File","FileName");
String ourSourceFileName = conf.get(key);
ourSourceFileName = ourSourceFileName + ".txt";
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File copy with 2 IDE Drive and Soundblaster problem

Hi,
When i try to copy large files my system will usually lock (windows totally freezes, the only solution is to do a hard reset). I cut the problem down to beeing an issue with my sound blaster live platinum 5.1.
Everything is working fine when I remove the soundblaster.
I read somewhere that this problem was known with former motherboard with VIA chipset like KT133 but I was hoping it had been fixed since then...
Here's my config :
KT6 Delta 2 FISR
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I have upgraded all the possible drivers : VIA4in1 (v4.51), latest BIOS upgrade (E6590v2.0), latest creative drivers....
I tried a lot of different settings in the BIOS (PCI latency, PCI bus mastering etc...)
This is really anoying...
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change pci latency to 96.
change "system performance setting" within DRAM settings to "FAST"
you could also;
try changing "System Bios Cachable" to "Enabled"
and change "C000 Shadow" to "Cacheable"
im using all those above settings, and thats with ALOT of drives attached as well, and ive been copying 20+GB files all over the place including over network drives.

Unable to access UNC path on 2012 R2 file server with ABE enabled

Brief Description:
We have granted access to people via a domain local group on a folder on a file server that is three levels deep from the share, i.e. \\servercluster\share\folder1\folder2\folder3, where folder3 is where the group is granted Read & Execute
access. The share has Access-Based Enumeration (ABE) enabled and the Everyone group has Full Control share permissions. We also use DFS, so the path for that is \\domain\dfsrootname\folderfororganization\share\folder1\folder2\folder3. People
in the aforementioned group only have access to folder3, its subfolders, and files. They do not have any access to folder2 or any of the other folders higher in the tree at all. Also, consider that folder3 contains a subfolder folder4, which is
simply inheriting permissions.
What we have found is that clients running Windows 7 SP1 have strange access issues when attempting to access the folder via either the DFS or cluster name UNC paths.
Detailed Testing Results Accessing Folder3 Directly:
NOTE: "UNC path" in the following test results means either the DFS or the cluster name share path. The results are the same regardless which path is used.
1 - Enter UNC path without trailing backslash in Windows Explorer's address bar:
Windows Explorer seems to do nothing for about 30 seconds and then displays the following error:
"Windows cannot access <UNC path>
Check the spelling of the name. Otherwise, there might be a problem with your network. To try to identify and resolve network problems, click Diagnose."
2 - Enter UNC path with trailing backslash in Windows Explorer's address bar:
The same error encountered in #1 is displayed immediately.
3 - Enter UNC path with or without trailing backslash but contained in double quotes in Windows Explorer's address bar:
Internet Explorer opens and displays the error:
"Internet Explorer cannot display the webpage"
4 - Enter UNC path without trailing backslash in Run dialog box:
An error message immediately appears:
"<UNC path>
The specified path does not exist.
Check the path and then try again."
5 - Enter UNC path with trailing backslash in Run dialog box:
Same as #4.
6 - Enter UNC path without trailing backslash but contained in double quotes in Run dialog box:
Same as #4.
7 - Enter UNC path with trailing backslash and contained in double quotes in Run dialog box:
Windows Explorer opens the correct UNC path location and displays the folder contents. This is the expected behavior for all of these attempts.
8 - Create Shortcut to UNC path by performing #7 and then dragging the folder icon in Windows Explorer's address bar to either to the desktop or the Favorites section, and then attempt to access the folder via
the shortcut.
Same as #7.
9 - Attempt to create a shortcut to the UNC path using the New Shortcut wizard:
Unable to successfully create the shortcut, regardless if you add a backslash at the end or enclose the path in double qutoes. When you press Next after entering the UNC path, you receive the following error:
"The file <UNC path> cannot be found."
10 - Disable ABE on the share and repeat all tests:
All tests with ABE disabled on the share have the same result as #7. There is no issue whatsoever accessing the desired folder when ABE is disabled.
Other Notable Behaviors:
If the aforementioned folder (folder3) contains one or more subfolders (e.g. folder4), you are able to access those subfolders via UNC path directly and then go up one level to folder3 without issue, even when ABE is enabled. You just cannot access
folder3 directly via UNC path unless you attempt to access it via the method used in #7 above or a successfully created shortcut.
Adding a user account directly to the folder3 ACL rather than using group membership makes no difference.
If access is granted to folder4 instead of folder3 (the fourth folder deep rather than the third), accessing folder4 directly via UNC path is not an issue regardless of ABE status or attempted access method.
Windows 8 and 8.1 clients have no trouble directly accessing the folder's UNC path via any method. The unusual, undesirable behavior seen in Windows 7 is non-existent on Windows 8.x clients.
Systems Involved:
Client: Windows 7 Enterprise SP1 x86
Server: Windows Server 2012 R2 Standard in cluster
Other Details About the Systems:
Both the client and the file server cluster are in the domain AD DS domain.
The client and the file server cluster are in different subnets.
There is no firewall or other packet inspection or compression service/device in between the client and server (not even Windows Firewall).
Question:
Is there a way to fix this behavior with Windows 7 clients and ABE enabled on the share so that it works correctly without forcing the clients or server to use SMBv1 or disabling ABE on the shares?

7-Zip 9.20
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It should be noted that I can't repeat the behavior on my test machine again today after some changes were made in our environment.
Today, I found that someone had modified permissions on the folder to give the group my test account was a member of rights to traverse the folder hierarchy from the root of the share. Additionally, in testing something with FIPS mode, I ended up reverting
my virtual machine to an older snapshot.
After removing the extra permissions that weren't present when I was doing my testing and reverting to the older snapshot, I am not having issues accessing the real equivalent of folder3 directly in Windows Explorer via DFS UNC path or creating a shortcut
with the New Shortcut wizard.
Things have been fundamentally changed and I cannot repeat the behavior on this particular folder. I will see if I can recreate the same situation on another folder.

Creating a control file copy with ASM

Configuration is Oracle 10.2, RAC, and ASM (Automatic Storage Management). I would like to create a second copy of the control file.
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Hi.
This is not testet so presede with caution as it is meant as a discussion ;-)
As I see it there is no logical way to extend the instance by adding a controlfile.
The following procedure might work (has not been tested)
I think you have to make a controlfilebackup with the database closed in normal mode using RMAN.
Further you might be able to edit the pfile with create pfile from spfile and further create spfile from pfile. Extending the controlfile parameter to represent number and names of controlfile needed.
With this done, the database is closed normal with a controlfile copy presented somewhere on the filesystem.
startup mount;
restore controlfile from '<backup controlfile location>'
alter database mount;
alter database open;
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Rgds
Kjell Ove

File Copy With JProgressBar

Hi i'm using the below code to copy a file and display the progress on screen. However the file copies ok by the progressbar is never shown. Can somebody please show me how to use the JProgressBar Component to copy a file and show the progress?
Thanks
Arlef
public void copyFileToMediaFolder(File f){
String newFileName = f.getName();
try{
File inputFile = f.getAbsoluteFile();
int fSize = (int)f.length();
FileCopyProgress fcp = new FileCopyProgress(this,true);
File outputFile = new File(mediaFolder + File.separatorChar + newFileName);
FileInputStream in = new FileInputStream(inputFile);
FileOutputStream out = new FileOutputStream(outputFile);
int c;
int bytesRead = 0;
int counter = 0;
while ((c = in.read()) != -1){
out.write(c);
counter = counter + 1;
bytesRead = fSize / 100 * counter;
in.close();
out.close();
fcp.dispose();
}catch(Exception ex){
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The progressbar is in a JDialog and is represented in
the following line in the code i sent earlier
FileCopyProgress fcp = new FileCopyProgress(this,true);Yes, i'm aware of that, but what I'm saying is that you don't seem to be updating the status of the progressbar while copying the file...I suppose the progressbar would start with 0 or 0% and then there should be some functions to be called to make it "progress" to 10..20...50..60% etc... So I believe you should call such a function from inside the loop where the file is being copied...I remember it used to be like that in Visual C++, so i'm supposing the behavior is similar in Java.
Good luck :)
Talal

XMP files remain with NEF files in my folder. Camera Raw suddenly reset leaving my edits gone. Will XMP files enable me to resume with those lost edits?

XMP files remain with NEF files in my folder. Camera Raw suddenly reset leaving my edits gone. Will XMP files enable me to resume with those lost edits?

I never tried this, but I'm pretty sure that with DNG files, Lightroom will ignore xmp files, even when you instruct Lightroom to "Read Metadata from File". Lightroom expects all the metadata to be in the DNG file, not in the xmp file.
Pick flags, as far as I know, are never written to xmp file; nor are they written to DNG files.
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Looking for a file manager with copy queue

Hey,
I'm looking for a file manager with a file-copy-queue feature.
It is useful when browsing mounted samba shares, and you find something you want to copy.
You'll then start copying the files, and then spot another useful folder. You start copying that as well
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Ranguvar wrote:If MC really does have that as a feature, it's once again proved itself _the_ graphical (sorta) file manager.
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Problem with File.copy() -- should this work?

I'm trying to copy a number of script files (I'm testing with just one) out of one folder into another. Here's the code:
(function() {
var myFolder = Folder(getScriptPath().parent + "/disabled");
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You can set the current folder like this:
Folder.current = "/d/test1/test2"
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Folder.current = ".."
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var myFiles = Folder.cuttent.getFiles ("../*.jsx")
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Peter

HT204387 can we get apple to make a fix to download that would enable the bluetooth file sharing with any deivce?

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regards
gavin_p

There is not "fix" to be provided, Apple made a decision to not include the file sharing profile.
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JPEG/PSD issue--I open a jpeg and edit it (levels, crop) and then "save as" and the save as option shows there are now levels in the image and it wants to save it as a .psd file or a copy with layers. What am I doing that has these settings appear?

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[EDIT] Just noticed that you did include 'Crop' in the subject line. Do you have 'Delete cropped pixels' checked?

Itunes is copying/converting 500gb of music from .wma to .m4a files that are on an external drive onto my laptop which doesnt have enough room. how do i reroute these newly converted files somewhere with enough space for them?

itunes is copying/converting 500gb of music from .wma to .m4a files that are on an external drive onto my laptop which doesnt have enough room. how do i reroute these newly converted files somewhere with enough space for them?
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When I have done this, all I did was network the two machines and copy the contents of the iTunes folder to the other machine, and that's it.
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Problem with UTL FILE COPY

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Anyhow make sure that the copy will start after the full generation of files.
You can think like a spool file generation with huge data. In that case initially spool file available with 0 byte only. After finish of query only it shows its actual size.

Importan Topic. Bigger File Dowload/Upload with resume feature

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http://www.javaworld.com/javaworld/jw-04-2003/jw-0404-ftp.html

File Copy with resume enable

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