Low Level Design + MultiThreading Course - Design [ANY] Booking System 🎟️ | LLD + Multithreading 🧵 | Movie Ticket Booking System 🎬

Article - https://codewitharyan.com/system-design/low-level-design Structured DSA (Basics to Advanced) Practice - https://codewitharyan.com/cwa-sheet/practice-problems My Uber Interview Experience - https://youtu.be/VGYJIX5yl74 My Coinbase Interview Experience - https://youtu.be/IjOC18b_dCw My American Express Inteview Experience - https://youtu.be/c3UhYefhnqk My JP Morgan & Chase Interview Experience - https://youtu.be/-jacTpY57no ..... more coming soon (along with LLD course on Second Channel) Most Frequently asked questions based on Leetcode Premium - https://codewitharyan.com/cwa-sheet/aryan-dsa-master-sheet LLD Syllabus which we gonna cover - https://codewitharyan.com/system-design/low-level-design Let's Connect: Main Channel for DSA & Live Streams - https://www.youtube.com/@ARYANMITTAL X Twitter : https://x.com/aryan_mittal007 📱Discord (Join Community) : https://discord.gg/vwUAz2pEHZ 📝Linkedin (About me): https://www.linkedin.com/in/aryan-mittal-0077 📸 Instagram: https://www.instagram.com/codewitharyanbhai 📱Telegram : https://t.me/aryan_mittal_group 🤖 Github: https://github.com/aryan-0077 ✨ Timelines✨ 00:00:00 - Introduction and Course Scope 00:00:30 - Importance of LLD + Concurrency Interview Questions 00:01:15 - Prerequisites: LLD Basics and Concurrency Crash Course 00:02:13 - Movie Ticket Booking System Problem Statement 00:03:07 - Universal Applicability of Booking Systems 00:04:01 - Common Interview Focus: Movie System + Concurrency 00:05:03 - Video Structure: From Problem to Full Code Walkthrough 00:06:01 - Project Scope: Controllers, Services, In-Memory Storage 00:07:03 - Standard System Architecture Overview 00:08:05 - What to Focus on in an Interview (Booking Logic Only) 00:09:21 - Enacting the Booking Flow: Admin and User Perspective 00:12:04 - Booking System: Real-Time Constraints and Seat Availability 00:14:02 - Show Definition and Entity Relationships 00:15:45 - Booking Flow from User Perspective 00:17:24 - Summary of Entities and Show Creation Logic 00:18:05 - Timeout Requirement During Payment 00:19:31 - Booking Operations and State Transitions 00:21:03 - Locking and Session Timeout Mechanisms 00:22:05 - Real-World Concert Seat Booking Systems 00:23:27 - Handling Concurrent Bookings in Interviews 00:25:02 - Business Risks of Double Booking 00:26:04 - Interviewer Expectations: Locking, Timeout, Scalability 00:27:23 - Focusing on Booking Service Only 00:28:32 - Clarifying Booking Multiple Seats vs Single Seat 00:29:03 - Only Build Core Entities in Interview 00:30:02 - Key Entities: Theater, Screen, Seat, Show, Movie, User 00:31:06 - Seat Lock Logic and Need for Custom Lock Object 00:32:01 - Enums and Session Management Features 00:34:08 - Locking Mechanism and Strategy Pattern 00:35:22 - Structure of Services and Controllers 00:37:41 - Entity Design and Object Relationships 00:38:54 - Detailed Controller-Service Mapping 00:40:15 - Seat Availability and Focus Areas 00:41:14 - Entity Fields and Minimal Modeling 00:44:18 - Seat Lock Design 00:49:01 - Lock Provider Interface & Implementation 00:51:12 - In-Memory Lock Provider Logic 00:55:04 - Visual Representation & UI Consistency 00:57:10 - Handling Concurrent Bookings 01:00:02 - Locking Show Temporarily for Verification 01:03:05 - Internal Data Structures for Lock Mapping 01:06:03 - Lock Validation & Cleanup 01:07:00 - Concrete Locking vs Complex Locking 01:08:03 - Utility Services and ID Generation 01:10:03 - Seat Availability Service Logic 01:11:18 - Booking Service Logic 01:12:32 - Payment Strategy Design Pattern 01:14:00 - Controllers Overview 01:15:08 - Main Class Initialization Logic 01:19:23 - Concurrent Flow Simulation 01:20:12 - Final Thoughts on Concerns & Responsibilities 01:22:49 - Best Practices in Multi-Threading 01:24:59 - Final Words and Advice ✨ Hashtags ✨ #programming #Interviews #leetcode #faang #maang #datastructures #algorithms #low-level-design #lld-by-aryan #systemdesign #onlinemovieticketbookingprojectinjava #lowlevelsystemdesign #systemdesigninterview #busticketbookingsystem #javacinematicketbookingsystem #onlineticketbookingsystem #ticketbookingsystem #bookingsystemwebsitebusticketingsystem #busticketbookingsystemprojectinphp #seatbookingsystemdesign #bookingsystemdesign #bustricketbookingsystem #airlinebookingsystemdesign #onlineticketbookingformoviesinjava