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Multithreaded Histogram Service

What is it and what does it do?

Upon running the main function, you are presented with a GUI to create a Histogram for a folder and all its files using a variety of different multithreaded approaches.
It creates the histogram by reading through all files in the folder and its subfolders, creating a histogram for all files and then aggregating them.
When executing one of the options, updates on which files are processed and eventually the final histogram get printed to the console.

How to use it?

  1. Make sure you use Java 11
  2. Run the main function in "/Assignment4/src/main/java/de/uniba/wiai/dsg/pks/assignment/Main.java" with the following program arguments:
    1. GUI
    2. /path/to/folder/for/which/histogram/should/be/generated
    3. txt (or whichever files you want to search)

What did I learn?

  • Threads, Shared Memory and Locking
  • Semaphor, Consumer-Producer Paradigm and Fork/Join Framework
  • Java Stream API
  • Message Passing with TCP-Sockets
  • Actor Model using Akka

Disclaimers

This was a project I did for my Parallel Programming class.
The work was done in a group of three and the GUI to execute the different multithreaded histogram services was already given by our instructors.