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  • How to manage transaction for database and file system in jee environment?

    - by Michael Lu
    I store file’s attributes (size, update time…) in database. So the problem is how to manage transaction for database and file. In jee environment, JTA is just able to manage database transaction. In case, updating database is successful but file operation fails, should I write file-rollback method for this? Moreover, file operation in EJB container violates EJB spec. What’s your opinion? Thank!

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  • Use of bit-torrent for large file download

    - by questzen
    The company I work for procures large volumes of data and does this by subscribing to FTP. I was wondering if it is possible to download the same using a tracker, the major challenge is authentication of the users IMO. Most ftp servers we subscribe to have a restriction of the number of ftp connection attempts. Does any one here have any experience with this? Any advice is welcome

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  • reading excel file in vb.net

    - by Mark
    can anyone help me on how to know EOF of excel using vb.net? i have this code but it crash when i try delete the proceeding rows from row 6 to downward. my problem is, my code was still reading a null values of rows that i deleted in excel.. this is my code: Dim xlsConn As New OleDbConnection Dim xlsAdapter As New OleDbDataAdapter Dim xlsDataSet As New DataSet xlsConn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & pathName & " ; Extended Properties=Excel 8.0") strSQL = "SELECT * FROM [Sheet1$]" xlsAdapter.SelectCommand = New OleDbCommand(strSQL, xlsConn) xlsDataSet.Clear() xlsAdapter.Fill(xlsDataSet) ListView1.Items.Clear() Dim listItem As ListViewItem For ctr As Integer = 0 To xlsDataSet.Tables(0).Rows.Count - 1 listItem = ListView1.Items.Add(xlsDataSet.Tables(0).Rows(ctr).Item("EmpNo").ToString) listItem.SubItems.Add(xlsDataSet.Tables(0).Rows(ctr).Item("EmpName").ToString) Next Can anyone help me to fix this bugs!

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  • file output in python giving me garbage

    - by Richard
    When I write the following code I get garbage for an output. It is just a simple program to find prime numbers. It works when the first for loops range only goes up to 1000 but once the range becomes large the program fail's to output meaningful data output = open("output.dat", 'w') for i in range(2, 10000): prime = 1 for j in range(2, i-1): if i%j == 0: prime = 0 j = i-1 if prime == 1: output.write(str(i) + " " ) output.close() print "writing finished"

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  • How to append text into text file dynamically

    - by niraj deshmukh
    [12] key1=val1 key2=val2 key3=val3 key4=val4 key5=val5 [13] key1=val1 key2=val2 key3=val3 key4=val4 key5=xyz [14] key1=val1 key2=val2 key3=val3 key4=val4 key5=val5 I want to update key5=val5 where [13]. try { br = new BufferedReader(new FileReader(oldFileName)); bw = new BufferedWriter(new FileWriter(tmpFileName)); String line; while ((line = br.readLine()) != null) { System.out.println(line); if (line.contains("[13]")) { while (line.contains("key5")) { if (line.contains("key5")) { line = line.replace("key5", "key5= Val5"); bw.write(line+"\n"); } } } } } catch (Exception e) { return; } finally { try { if(br != null) br.close(); } catch (IOException e) { // } try { if(bw != null) bw.close(); } catch (IOException e) { // } }

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  • Windows batch file timing bug

    - by elbillaf
    I've used %time% for timing previously - at least I think I have. I have this weird IF NOT "%1" == "" ( echo Testing: %1 echo Start: %time% sqlcmd -S MYSERVER -i test_import_%1.sql -o "test_%1%.log" sleep 3 echo End: %time% ) I run this, and it prints: Testing: pm Start: 13:29:45.30 End: 13:29:45.30 In this case, my sql code is failing (different reason), but I figure the sleep 3 should make the time increment by 3 at least. Any ideas? tx, tff

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  • Explain please download file iphone

    - by Floo
    hi all ! i want to download plist from my server usibg http:// i have searched the web and everybody says use that class or that one ... but no example on how to do this. may be it is really simple but i'm a noob so if someone can explain or give a link he'll be my heroe thanks to all !!!

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  • copy file into another file in prolog

    - by smile
    Good morning/evening how can I write something in a file and then copy its content into the current file? for example I consult file1.pro then I have rule write something in file2.pro , after this rule finish its job I want append the content of the file2.pro int file1.pro . when I tried to append into file1.pro directly , the data appear like undefined symbols ,I don't know why please hellp me thank you.

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  • Bash: how to process variables from an input file?

    - by gilgongo
    I've got a bash script that reads input from a file like this: while IFS="|" read -r a b do echo "$a something $b somethingelse" done < "$FILE" The file it reads looketh like this: http://someurl1.com|label1 http://someurl2.com|label2 However, I'd like to be able to insert the names of variables into that file when it suits me, and have the script process them when it sees them, so the file might look like this: http://someurl1.com?$VAR|label1 http://someurl2.com|label2 So $VAR could be, for example, today's date, producing an output like this: http://someurl1.com something label1 somethingelse http://someurl2.com?20100320 something label2 somethingelse

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  • Determining whether a file is a duplicate

    - by Todd R
    Is there a reliable way to determine whether or not two files are the same? For example, two files with the same size and type may or may not be the same binarilly (yeah, I know it's not really a word). I assume that comparing one or two checksums of the files will help, but I wonder: How reliable are checksums at determining whether two files are different; what are the chances of two different files having the same checksum? Would reliability increase by applying additional checksum comparisons? Which checksum algorithm(s) would be the most efficient and/or reliable? Any ideas, suggestions or thoughts are appreciated! P.S. The code for this is being written in Java running on a nix system, but generic or platform agnostic input is most helpful.

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  • Count the number of lines in a file with Ruby, without reading entire file into memory

    - by smnirven
    I'm processing huge data files (millions of lines each). Before I start processing I'd like to get a count of the number of lines in the file, so I can then indicate how far along the processing is. I am using Ruby, and because of the size of the files, it would not be practical to read the entire file into memory just to count how many lines there are. Does anyone have a good suggestion on how to do this?

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  • Adding file names to an array list in java

    - by Chris G
    Hi I am currently needing to load the contents of a folders filenames to an arraylist I have but I am unsure as how to do this. To put it into perspective I have a folder with One.txt, Two.txt, Three.txt etc. I want to be able to load this list into an arraylist so that if I was to check the arraylist its contents would be : arraylist[0] = One arraylist[1] = Two arraylist[3] = Three If anyone could give me any insight into this it would be much appreciated.

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  • In Windows 8.1, how can I configure File History to backup *some* of my SkyDrive folders?

    - by Matthew
    I want File History to back up all of the folders in my SkyDrive except for the media folders (Music, Pictures, Videos, Podcasts). My media folders are "available online only", the rest of "available offline". Right now File History does not back up any of the content in my SkyDrive, and I can't seem to find a way to configure which folders it backs up. I found some sources that say if my SkyDrive is available offline, it will be added to File History. But I don't want to make my entire SkyDrive available offline, just the non-media folders.

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  • Windows 7, file properties, date modified, how do you show seconds?

    - by Jordan W.
    Anyone know a way to immediately show the seconds of a file's date modified property in the GUI? So if you create a file, any file in any directory, right-click and choose Properties, the date modified (if it's recent) will say something like "dd/mm/yyy hh:mm, one minute ago" - reminder this is in Windows 7. Windows XP did it normally. Then they changed something. If you wait a while, eventually you'll see the seconds, I'm not sure how long a while is, but this is incredibly annoying if you want to troubleshoot something that relies on the seconds of timestamps... is there a setting? registry key I can change perhaps? I'm literally using Chrome, pasting in the path of the directory to be able to see the seconds quickly (as a workaround) but would be nice to be able to use Win7.

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  • Use of bit-torrent for large file download as an alternative to FTP

    - by questzen
    The company I work for procures large volumes of data and does this by subscribing to FTP locations. I was wondering if it is possible to download the same using a tracker, the major challenge is authentication of the users IMO. Most ftp servers we subscribe to have a restriction of the number of ftp connection attempts. Does any one here have any experience with this? Any advice is welcome. Edit To clarify, we subscribe to third party vendors and access their ftp location using credentials provided by them. The service is not exclusive to us, they do sell their data to several others. If we could be part of the swarm, the download rates would be pretty high without added penalty. The question is about the possibility of achieving this, so that we can put-forth a proposal in those lines. The vendors obviously wouldn't share data to non-subscribers, so that is a constraint.

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