1. How can I lock a file using java (if possible) stackoverflow.comI have a java process that opens a file using a FileReader. How can I prevent another (java) process to open this file, or at least make that second process know ... |
2. How to ensure file integrity on file write failures? stackoverflow.comFollow up to: How to safely update a file that has many readers and one writer? In my previous questions, I figured out that you can use FileChannel's lock to ensure ... |
3. Java keeps lock on files for no apparent reason stackoverflow.comDespite closing streams in finally clauses I seem to constantly run into cleaning up problems when using Java. File.delete() fails to delete files, Windows Explorer fails too. Running System.gc() helps sometimes ... |
4. checking if a file locked in java stackoverflow.comI plan my java program to read a file which can be locked by another program to write into it so I need to check if the file is locked, if ... |
5. Locking and unlocking files using the java API stackoverflow.comOne of our clients is using some Novel security software that sometimes locks some .class files that our software creates. This causes some nasty problems for them when this occurs ... |
6. File locking (read/write) in Java stackoverflow.comI'm writing something to handle concurrent read/write requests to a database file. ReentrantReadWriteLock looks like a good match. If all threads access a shared RandomAccessFile object, do ... |
7. Locking and Updating a File Accordingly stackoverflow.comNote: I have read other posts on how to lock and unlock a file. I didn't find anything special that I wasn't aware of. So I am gonna put my scenario ... |
8. java io read and write lock stackoverflow.comsuppose I have a file that might gets written by one thread/process Writer and read by another thread/process Reader. Writer updates the file every x time interval, and Reader reads it every ... |
9. Java File Locking stackoverflow.comI have several threads (some of which are spawned by Process X, others by Process Y, et cetera), and each thread needs to write to a file |
10. Problem with Java file locking mechanism (FileLock etc) stackoverflow.comI am creating a simple application for opening and editing xml files. These files are located in a local folder accessed by multiple instances of the application. What I want to do is ... |
11. Java: opening and reading from a file without locking it stackoverflow.comI need to be able to mimic 'tail -f' with Java. I'm trying to read a log file as it's being written by another process, but when I open the file ... |
12. Locking a file to verify a single execution of a service. How reliable? stackoverflow.comI am deploying a little service to an UNIX(AIX) system. I want to check if there is no active instance of that service running when starting it. How reliable is to ... |
13. Deleting locked files with Java? stackoverflow.comWe have to delete some directories and their contents using Java running on Windows. I was worried about running into the directory files being locked. We could just invoke Unlocker to ... |
14. Acquire a lock on a file stackoverflow.comDear all, I want to acqeuire a lock on a file when threo read gets started on a specific ... |
15. detect locked file stackoverflow.comGiven a reference to a |
16. Java file locking stackoverflow.comI've written the following helper class that should allow me to get an exclusive lock on a file, then do something with it. |
17. Java file locking stackoverflow.comI've been trying to use
|
18. Lock a file and delete it without first releasing the lock stackoverflow.comI want to read from a file and then delete it, all the while preventing other processes from accessing it. How can this be accomplished? FileLock won't work because you have ... |
19. Put a lock on file stackoverflow.comi access some files kept on server using my application. Multiple users can login into the application, i want to put some explicit lock on files that is opened by 1 ... |
20. Process locked portion of file (Java) stackoverflow.combeen pulling my hair out about this for ages! Trying to put a lock on a text file ("test.txt") then read a line from the text file and release the lock. I get ... |
21. Lock file for writing? stackoverflow.comPossible Duplicate:Is it possible to lock file so that other apps cannot write to file ... |
22. Unable to read from newly locked file stackoverflow.comSo I try to locked the file to read it, but I got IOException, any idea why? |
23. Java FileLock: How to Load Dynamic Library From Locked File? stackoverflow.comI have an applet that retrieves a byte array from a backend server. This byte array contains a dynamic library (DLL or SO, depending on which OS the applet is running ... |
24. Handling file locking, when the application quits unexpectedly stackoverflow.comI'm investigating the best (cross-platform) way to lock some files that are used by a Java application. The worst-case scenario is that the program quits unexpectedly (user forces termination, or unclean exit). ... |
25. Lock file coderanch.com |
26. Deleting locked files. coderanch.com |
27. removing lock on the file to delete. coderanch.comi am running into a problem after FTP the file. it wont delete it unless i close tomcat. i get the error that the file is being used. although i am closing the connection. here is the code. public void upload(String remotedir, String file, String localdir, boolean asc) throws IOException { //Check if file is OK File ftpFile = new File(localdir ... |
28. File Lock using Java coderanch.comHi, This is the problem statement, In our project we are using ftp to transfer zip files from different machines. Once the file get's transferred the local machine it is picked up by the application running on the local machine.Both this application is running in asynchronous maode. The problem is, some time application running in the local machine,tries to pick up ... |
29. Locking a file coderanch.comIs there any mechanism through which we can lock a file opened using FileInputStream. that is if i am accessing one file called properties file via some program. no other program should be given permission to access that properties file until the program which was using it exits. Note: I want this to be done in JDK 1.3 only |
30. Can I read a Locked file? coderanch.com |
31. how to lock a file? coderanch.comjava.nio.channels.FileLock NOTE: Whether or not a lock actually prevents another program from accessing the content of the locked region is system-dependent and therefore unspecified. The native file-locking facilities of some systems are merely advisory, meaning that programs must cooperatively observe a known locking protocol in order to guarantee data integrity. On other systems native file locks are mandatory, meaning that if ... |
32. File Lock I cant seem to find - can you? coderanch.comIm building an app that allows photos to be uploaded to a server. I had it going perfect with jpeg and gif images only but I wanted to support tiffs and if they uploaded a tiff, convert it to a jpeg. Anyways I have it all working fine .... not 100% thrilled with the logic yet but its getting there. Im ... |
33. Regarding Lock on file coderanch.comI believe the actual "locking" depends on the operating system. The lock may be implemented as an advisory lock, so if other apps don't check for it, they won't know the file is locked. try { File file = new File("myfile"); FileChannel fileChannel = new RandomAccessFile(file, "rw").getChannel(); FileLock myLock = fileChannel.lock(); try { myLock = fileChannel.tryLock(); } catch (OverlappingFileLockException e) { ... |
34. copy a locked file coderanch.com |
35. File Locking coderanch.comHello, I am workign on a Swing application where in I am reading Some Information from Two XML files in to my application. After making some modifiactions to the readin data i am writing that back to the Same File. now I need some help in attaining lock over those two files so that untill my application is running no other ... |
36. How to lock a file coderanch.com |
37. locking a file from processing coderanch.comI don't think there's anything special about renaming with a dot in front of the name, except that some platforms will hide that file from ordinary directory listings presented to the user. They will not be hidden from Java, I believe, even on those platforms. However, if your programs "know" that a file starting with a dot is already being processed, ... |
38. Locking a file coderanch.com |
39. File Becomes Locked so App Cannot Make Changes to it coderanch.comWhen I run the following the file becomes Locked and the App cannot manipulate it. How can I release the file after the properties are retreived? public void setGetAppDefaults(String folderName){ String filePath = folderName + "\\DPDMconfig.properties"; File pFile = new File(filePath); Properties properties = new Properties(); try { properties.load(new FileInputStream(filePath)); this.defaultSignOffQueueFilterStatus = properties.getProperty("defaultSignOffQueueFilterStatus"); this.defaultJobNumberSignOffQueueFilter = properties.getProperty("defaultJobNumberSignOffQueueFilter"); this.defaultModelNumberSignOffQueueFilter = properties.getProperty("defaultModelNumberSignOffQueueFilter"); this.defaultPrioritySignOffQueueFilter = ... |
40. FileInputStream/FileChannel lock and randomly fail to unlock files? coderanch.comHello all, I'm working on a piece of software that basicly does this: * Watches an in-box directory for new PDF files (from mass scanning). * Reads the new files and displays a 'thumbnail' of each of them so a user can sort them. * Copies the sorted file one by one to a storage folder based on the sort code ... |
41. File locking in Unix? coderanch.comHello, I have just subscribed to this forum and I have a question. Basically I have a Swing client on Windows and a JBoss server on Unix. From the client I can access RTF files located on Unix via a Samba share. This RTF files can be opened using Word on Windows. When some RTF file is opened in this way, ... |
42. tryLock gets a lock when it shouldn't coderanch.comHello, I have a routine in my application that tests to see if a given file is locked. This file belongs to another java application written by someone else in my organization and I have no idea if they are doing anything to correctly lock the file. However, on windows, when the other application is running, I am prevented from deleting ... |
43. how to release file lock forums.oracle.com |
44. File.isDirectory() and File.exists() can lock up application forums.oracle.comGotchas: This presumes that the flag is not changing in the file system between calls, AND java.io.FileSystem is 'package-private' so I'm calling its methods using introspection. This works for me now but may not work for others or in the future due to native file system security issues. Oh, well, this is not production code. |
45. Using file locks forums.oracle.com |
46. File Lock and Reading File forums.oracle.comSo, I have an application where I read a file using a buffered file reader, file input stream, etc. But, I want to make it so that only one instance of the application can be running by applying a lock on that file, but still be able to read it. Is this possible, if so, could someone show me an example.? ... |
47. How to lock a file in solaris forums.oracle.comOf course. There is even a class for it. However, be forewarned, locks only work when everything "plays nice". If one program locks it, and another program doesn't bother to attempt locking it before doing something with it, it will be able to "pull the carpet out from under" the locking process. If you mean "lock" in the "Windoof" sense (in ... |
48. File lock forums.oracle.comI have two temp and result folders. There is a listener program (vb-based) keep listening in the result folder until there is a file and manipulate the file. A java program will create and validate a file in temp folder and then finally move it to result folder. I would like to ask that will there be automatic file lock on ... |
49. Locking code by creating and removing a file forums.oracle.com |
50. FileLock - how to release locks on files no longer used. forums.oracle.comHi Everyone, Well its a bad problem to begin with, but I have managed to create this monster somehow! I am trying to implement exclusive locks on files when they are accessed. I am using FileLock/ FIleChanell lock() method for this purpose. The thing is my release lock code is not getting called at the right times. So when you close ... |
51. File lock forums.oracle.com |
52. File locking issue forums.oracle.comhi , I use a java applet for ftp images upload using a third party ftp API library (edtftpj). i run my applet from browser but I'm experiencing a strange issue : -i upload a file & leave the browser opened. -i then open this same file with gimp or photo-shop & get 'file in use' error. -if i close browser ... |
53. File Locking forums.oracle.com |
54. How to check whether a file was locked? forums.oracle.comYou can lock files for read or write or both. What these mean is platform dependent. Normally if you lock a file for read then other processes can also read it but none can write it. If you lock a file for write then no other process can access it. However on many OS's file locks are advisory meaning other processes ... |
55. Removing a lock file. forums.oracle.com |
56. How to delete locked files ?? forums.oracle.comif you are generating a zip file, you must be accessing the files you are adding to the archive, and somewhere along the line you are not releasing the reference. Look thru the part of the code where you are reading the files to put them in the archive, and where you are writing the archive and encryted archive. If you ... |
57. can you lock a file if you're using FileReader/Writer forums.oracle.comIs there a way of locking a FileReader as opposed to an FileInputStream? FileReader doesn't seem to have a getChannel() to then use trylock() as is done to lock files in all the examples I've come across. Will I have to treat my character files as byte streams instead and use FileInputStream if I want to lock them? Thanks! |
58. Question regarding file locking... forums.oracle.comHi all-- Here's the essential question... If I have a shared file across the network that will be subjected to multiple accesses from multiple clients. Most just need to read it, but some will occassionally need to write to it. If my client application obtains a lock on the file using FileLock myLock = myFileInputStream.getChannel().tryLock() , will other clients still be ... |
59. File Locking forums.oracle.comAlso, you should never need to call run() directly. If you want something to run in a separate thread of execution, call Thread.start(). If you don't want it to run in a separate thread of execution, there's no need to create a Thread. Just put the code in some appropriately named method and call it directly. run() is just a normal ... |