Pendency System

Machine Coding interview

• Pendency is a system that is able to track counts of in-flight/in-progress entities.

• The system is told when to start tracking a particular entity, and when to stop. And at any point the system can be asked how many entities are in-progress (or in-flight). The system is expected to give this count, as fast as possible

• Pendency System - Complete Problem Statement

This is not the Code in actual interview.
Done as a practice for this problem statement.
Hence, design is done more thoughtfully.

Code/Run

• Java8, Maven, IntelliJ(Community)

• Driver class TrackingServiceTest.java

• All necessary code in src dir

Understanding the Working

• To understand the working, read Problem Statement thoroughly
• Then explore dir in this order:
  1. Entities
  2. Repository
  3. TrackingServiceTest.java
  4. Then, deeply go through Services