filelock

I 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 to read it, it locks the file and the other process can't write to it anymore. Any help would be greatly appreciated! Here is the code that I'm using currently: public void read(){ Scanner fp = null; try{ fp = new Scanner(new FileReader(this.filename)); fp.useDelimiter("\n"); }catch(java.io.FileNotFoundException e){ System.out.println("java.io.FileNotFoundException e"); } while(true){ if(fp.hasNext()){ this.parse(fp.next()); } } } Rebuilding tail is

The StreamReader locks a text file whilst it is reading it. Can I force the StreamReader to work in a "read-only" or "non locking" mode? My workaround would be to copy the file to a temp location and read it from there but I would prefer to use the StreamReader directly if possible. Any alternative suggetions? Background: I've written a small app to get some stats out of a log file. This file is constantly being updating (several times a second) by an outside program lets call AAXXYY. Reviewing the output suggests that my app may be locking the file and preventing AAXXYY from writing. This is

I have a process that will be called rather frequently from cron to read a file that has certain move related commands in it. My process needs to read and write to this data file - and keep it locked to prevent other processes from touching it during this time. A completely separate process can be executed by a user to (potential) write/append to this same data file. I want these two processes to play nice and only access the file one at a time. The nio FileLock seemed to be what I needed (short of writing my own semaphore type files), but I'm having trouble locking it for reading. I can lock

We have a project that is stored within our TFS server and some files were Checked-Out by me from another computer and another user (both of which are not used anymore). Is there a way to force the unlocking of the file (no changes were made to it so it's safe to do so if I can only do it). If you login into the source control with the admin account, you will be able to force undo checkout, or check in with any file you provide. Here's what I do in Visual Studio 2012 (Note: I have the TFS Power Tools installed so if you don't see the described options you may need to install them. http:/