How to run

• Extract jars folder: tar -xzvf jars.tar.gz
• Add jars folder to java class path
  • Add this line to .bashrc: export CLASSPATH=$CLASSPATH:<path_to_jars>/*:<path_to_jars>/lib/*
• Ensure cassandra is insalled and a server is running on localhost
• javac *.java
• rmiregistry (Ubuntu)
• Setup database using java DatabaseSetup
• java Server 1 (new terminal)
• java Server 2 (new terminal)
• java Server 3 (new terminal)
• java MasterServer (new terminal)
• java Client (new terminal)

To setup cassandra with multiple nodes on local host:

• Install ccm: pip3 install ccm
• Create a cassandra instance: ccm create Dream11 -v 3.11.10
• Add nodes: ccm populate -n <num_nodes>
• Start the server: ccm start
• To verify it is working: ccm node1 ring.
  • <num_nodes> servers will be running on 127.0.0.1, 127.0.0.2, ...

Verify Java version 8 is installed and selected:

• sudo apt-get install openjdk-8-jdk openjdk-8-jre
• To change java version: sudo update-alternatives --config java
• To change javac version: sudo update-alternatives --config javac

All Client functions:

• add_match <num players per team> <all player names> : Adds a new match. (player names should be space separated)
• update_player_score <match id> <player id> <score>: Updates the score of player
• create_team <match id> <player ids>: Creates a new team for a user. (player ids should be space separated)
• get_score <match id> <user id>: Get the score of team for user
• get_rank <match id> <user id>: Get rank of user
• get_leaderboard <match id>: Get LeaderBoard of the match
• start_match <match id>: Start match . No new teams can be created after this
• show_players <match id>: Show player names and player Ids of all players playing in match
• exit <match id>: Stop the match simulation and exit the program

Server functions:

• Master server:
  • add_node <nodeName>: Add a new slave node with name
  • delete_node <nodeName>: Delete an existing slave node with name
• Slave server:
  • load: Sync match data with the database. (Useful when bootstrapping a new slave server while the match is ongoing)