Simple Virtual Waiting Room -Challenge 1

 

 Simple Virtual Waiting Room (VWR)

1. The Problem

Our website can only handle 10 users per minute. If more than 10 people try to access it at once, the server will crash. We need a system that:

1. Counts incoming users.

2. Redirects "overflow" users to a waiting page.

3. Admits them back to the main site one by one as space becomes available.

2. Intern Tasks

• Create a Gateway: A simple script that checks: if (active_users < 10) { allow } else { send to queue }.

• Build the Queue: Use a simple list (FIFO) to store user IDs.

• The Wait Page: A basic HTML page that says: "You are number X in line. Estimated wait: Y minutes."

• Admission Logic: Every 30 seconds, pull the next user from the queue and "admit" them.

3. Sample Datasets (Simulation)

Provide these two datasets to the interns. They should write a script to "read" these files and simulate how their system reacts.

Dataset A: The Traffic Surge (Input)

This file simulates users arriving at the site. The interns' code should process this and decide who goes to the "Live Site" and who goes to the "Queue."

Timestamp	User ID	Action	Result (Expected)
09:00:01	User_01	Request Access	Admitted (Spot 1/10)
09:00:05	User_05	Request Access	Admitted (Spot 5/10)
09:00:15	User_11	Request Access	Queued (Position #1)
09:00:20	User_12	Request Access	Queued (Position #2)
09:00:45	User_25	Request Access	Queued (Position #15)

Dataset B: Server Capacity (Constraints)

Interns must hard-code these limits into their logic to test "stress" scenarios.

Parameter	Value	Description
MAX_CAPACITY	10	Maximum users allowed on the site at once.
ADMIT_RATE	2	Number of users to pull from the queue every 60 seconds.
SESSION_TIMEOUT	5	Minutes a user can stay on the site before they must leave.