Question

i want the strategy for loading files by multiple threads from a single directory,without accidentally loading same file by multiple threads.

Solution:

1. Allow each thread sequentially to collect set of files to add in their data structure such as arraylist and process parallel.

2. Take the filename , anyways the last 5 digits are numbers , do a mod(last5digit,5) +1 will give 1,2,3,4,5 and respectively those file with mod result will be processed by corresponding Thread 1,…Thread 5.

i want a solution which should not have mutual exclusion problem.kindly let me know your comments from your experience.

Answer 1

Essentially any thread-safe access to a list should work. I think I would:

• put the list of files in a BlockingQueue
• have each thread continually take the next item (file) from the queue and process it.