Postal Probe Phase 3: Java SpringBoot API with AWS Database Hosting

Dive into the extensive API solution of Postal Probe Phase 3, built with Java SpringBoot and hosted on AWS! This video goes beyond a simple demo, exploring real-world use cases, unique Java programming concepts (like Composite Primary Keys, Wildcards, and Spring JDBC), and a complete code breakdown. We'll also cover crucial AWS database hosting tips (like managing dynamic IP addresses and security groups) and discuss future enhancements for this project. Learn from the challenges of working with real-world datasets and see how to build a robust, scalable API.

0:00 - Introduction
1:01 - Project Origins and Data Challenges
3:38 - Database Design
4:15 - AWS RDS Setup and Configuration
7:01 - Implementing DB structure in Project
8:36 - @Id & @IdClass Explained
12:26 - @Embeddable & @EmbeddedId Explained
17:37 - Code Breakdown
19:36 - Introducing Wildcards
21:33 - Type Safety Explained
23:54 - Types of Wildcards
26:44 - Stored Procedures
30:35 - JDBC Template
33:20 - @Transactional annotation & Rollback Mechanism
35:12 - UUID Explained
36:43 - In-memory DB Structure
41:34 - Swagger Integration
48:53 - Hands-on SP Creation & Implementation
1:07:10 - Making a commit
1:07:51 - Code In Action

The video will cover:

The origin of the project: starting from a CSV file and Google Apps Script.

The problem of non-unique identifiers in the dataset (pincode and office name) and the solution using a Composite Primary Key (pincode, officename, district, divisionname).

Database setup in MySQL and migration to AWS RDS, including tips for handling dynamic IP addresses and configuring security groups on AWS.

Implementation of the database structure in SpringBoot using @Embeddable and @EmbeddedId annotations. It also explains the two ways of creating composite primary key in Spring Data JPA.

Controller design (PincodeController and DeliveryController) to separate postal information retrieval and delivery-related endpoints.

Explanation of the Pincode endpoint, including pagination with Pageable and the use of Wildcards to handle different response types (error, single record, list of records) and the concept of Type Safety.

Explanation of the DeliveryController, including the use of Stored Procedures, JdbcTemplate, @Transactional annotation for transaction management, and UUIDs.

Explanation of Swagger integration in Spring Boot using springdoc-openapi-starter-webmvc-ui dependency, @Configuration annotation, OpenAPI class, Info class, @Operation , @Parameter and @ApiResponse annotation.

All of the API endpoints in action.

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