banking-kata

Banking kata

Description

Write a class Account that offers the following methods:

• void deposit(int)
• void withdraw(int)
• String printStatement()

An example statement would be:

Date        Amount  Balance
24.12.2015    +500      500
23.8.2016     -100      400

Performance improvements

The application performance was verified using a JMH benchmark. After that a small refactoring was performed and the performance improvement is obvious as shown on the images below (more = better). Generated using this page.

Before: After:

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After improvement of the benchmark, different approach to synchronization while printing was verified once again and a 20% performance improvement can be easily observed:

Before: After:

Additional requirements

CSV file based account implementation ✅

Performance comparison

Statement returned as an HTML table ✅

Example:

Date	Amount	Balance
24.12.2015	+500	500
23.8.2016	-100	400

<table>
    <thead>
        <tr>
            <th>Date</th>
            <th>Amount</th>
            <th>Balance</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>24.12.2015</td>
            <td>+500</td>
            <td>500</td>
        </tr>
        <tr>
            <td>23.8.2016</td>
            <td>-100</td>
            <td>400</td>
        </tr>
    </tbody>
</table>

Performance