Peer-to-Peer (P2P) Service

Tracker

java Tracker PATH_OF_LISTFILE

• PATH_OF_LISTFILE: The path of the file which contains all the files in the P2P system
  File Format: each line of the file contains the name of a file
  file's name is unique within the system and we use it as identifier

Peer

java Tracker IP PORT USER_NAME PASSWORD PATH_OF_SHARED_DIRECTORY AUTO_MODE

• IP: PEER'S IP
• PORT: PEER'S PORT
• USER_NAME: PEER'S USERNAME
• PASSWORD: PEER'S PASSWORD
• PATH_OF_SHARED_DIRECTORY: all files in this directory will be shared. You should also have a directory under this directory which should be called "tmp". This directory will be used to temporary save the file's parts, in case the peer leaves the system.
• AUTO_MODE: {true, false} If we set auto-mode to false, a command line menu will be shown and we will download whatever file we want. On the other hand, if we set auto-mode to true, the peer will try to download all system's files

---

Simulation

We simulate a system with 1 tracker and NUM_PEERS peers. At the beginning, the peers with a file at their shared directory are called seeders and partition those files. All peers start sending requests one another. SEEDER_SERVE requests are sent to seeders and COLLABORATIVE_DOWNLOAD requests are sent to non seeders. Once the peers receive requests, they choose to answer to only one of those requests, using a protocol which rewards the ones that share the most files. At the end, all peers have saved in their SHARED_DIRECTORY all system's files.

java Simulation NUM_PEERS OUT_PATH PATH_OF_LISTFILE TEST_DATA_PATH 

• NUM_PEERS: the number of peers you want to create
• OUT_PATH: path that the class files are placed
• PATH_OF_LISTFILE: Tracker's input path
• TEST_DATA_PATH: this should be a directory under of which all peer's paths will be placed. Under this directory you should have NUM_PEERS directories with the following name pattern: each one of them should be called "peerX" where X = 0, 1, ..., NUM_PEERS-1. Under these directories the shared directory should be placed.
  For example, if we have 2 peers:
  

.
└── TEST_DATA_PATH
    ├── peer0
    |   └── shared_directory
    |       └── tmp
    └── peer1
        └── shared_directory
            └── tmp

---

Architecture:

---

This project was developed with the Pair Programming technique.