Multiple multi-threaded key-value stores (RPC/RMI)

This project replicates a key-value store across 5 distinct servers to increase bandwidth and ensure availability.

It's set up to allow multiple concurrent clients to communicate with any of the servers and perform three basic operations:

• PUT(key, value)
• GET(key)
• DELETE(key)

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Usage (locally):

1. Open up two terminal windows and navigate to /Project3/src/main/java
2. In one window, type javac coordinator/*.java participant/*.java utils/*.java main/ServerMain.java (hit ↩), followed by java main.ServerMain (hit ↩)
3. The servers are now running
4. In the other window, type javac client/*.java utils/*.java main/ClientMain.java (hit ↩), followed by java main.ClientMain (hit ↩)
5. The client is now running
6. The predefined protocol is:
   • PUT:key:value(hit ↩)
   • GET:key(hit ↩)
   • DELETE:key(hit ↩)
7. To shut down the application, type stop(hit ↩) or shutdown(hit ↩)

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SIDE NOTES

• Each participant has a private method that generates a random number from 0 to 100 and, if the number generated is equal to 23, it aborts the transaction.
• Other abort cases are the following:
• A client tries to delete a nonexistent key.
• A client tries to add an already existent key.
• At boot up, a client connects to a participant at random.