Writing into a File in a Multi Threaded app.

[snehalkgandhi]

Hi,
In my application, there are multiple threads and each thread writes into the LOG file. How will i know which thread wrote which line?

Please let me know on this..

Thanks in Advance
Snehal Gandhi

[neilcoffey]

Firstly, I'd advise not literally trying to have any old thread write to the log file. Create a single logger thread that takes lines from a queue and a method that lets other threads pass lines to be logged to it. (See my example here of using a BlockingQueue to create a logger thread.)

Then, to know which thread wrote the line, write something like the thread name at the beginning of the line. When you create your threads, remember to set their name to something useful.