Online Banking Application Project

Baseline Application Description: Online banking application for tellers to perform transactions such as withdraws/deposits, fund transfers, and view transaction statements on user accounts

Baseline Application Features:

• The system shall provide a login/logout interface for bank tellers
• Tellers shall be allowed to create/edit customer information
• Tellers shall be allowed to create accounts for customers
• Tellers shall be allowed to deposit/withdraw money from accounts
• Tellers shall be allowed to transfer funds between two of a customer’s accounts
• Tellers shall be allowed to check the account balances
• Tellers shall be allowed to check the transaction history of accounts
• Tellers shall be allowed to close accounts

Note: This banking application only accounts for non-interest-bearing accounts. It does not consider interest, tax, commission, overdrafts, etc.

Reliability Requirements:

• The client shall automatically fail over to another server without any noticeable effects on the front-end client screen aside from, at most, a 30-second delay for the fail over
• A client, or a transaction, shall not be affected by a single server failure
• The system shall be available 24×7 without any critical system failures
• No account shall ever be in an inconsistent state
• The teller shall never observe system level error on the client screen/interface

Real-Time Requirements:

• Each transaction (except for transaction history queries) shall be completed within 1 second in the testing environment with at most 1000 user accounts
• Each transaction history query of up to 1000 items shall be completed within 5 seconds in the testing environment with at most 1000 user accounts
• Balance updates as a result of deposit, withdrawal, and/or fund transfer transactions shall take effect immediately (less than 50 ms) upon completion of those transactions

Performance Requirements:

• The system shall support at least 100 concurrent and at most 500 concurrent client sessions
• The system shall support up to 1000 TPS (transactions per second)

Baseline Application

Fault-Tolerant Baseline Application

1. Fault Detection:
   1. How can a Client detect failure?
   2. How many faults can be tolerated?
2. Fail-Over
   1. How can a Client check if a server bean instance is alive? 1
3. Recovery
4. Check Pointing
5. Sequence diagram