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Home - Lessons - Java Full Stack Developer Training - M3 — Spring Boot Application Structure - Wire dependencies with constructor injection and component scanning

Java Full Stack Developer Training Wire dependencies with constructor injection and component scanning
Java Full Stack Developer Training
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M1 — Core Java and the JVM
Read and write Java syntax the way production code uses it
Reading
Model problems with classes, interfaces, records and encapsulation
Reading
Use collections, comparators and streams without copying a loop pattern
Reading
Handle exceptions with a contract callers can act on
Reading
Read a stack trace and find the failing line and the cause
Reading
Profile bytecode and JVM flags for memory and garbage collection behaviour
Reading
M2 — Databases, SQL and JDBC with MySQL
Design a normalised schema with keys, constraints and indexes that match the queries
Reading
Write joins, aggregations and window functions against real reporting needs
Reading
Connect with JDBC, use prepared statements and map result sets to objects
Reading
Manage transactions, isolation levels and rollback on failure
Reading
Use a connection pool and set sane pool sizing for a service workload
Reading
Read an execution plan and fix the query that scans the whole table
Reading
M3 — Spring Boot Application Structure
Start a Spring Boot service and read its auto-configuration report
Reading
Wire dependencies with constructor injection and component scanning
Reading
Externalise configuration per environment with profiles and typed properties
Reading
Separate domain, service and persistence layers so the code stays testable
Reading
Write unit and integration tests with a containerised database
Reading
Expose health, metrics and readiness endpoints for the platform
Reading
M4 — REST API Design with Spring MVC
Design resource URLs, HTTP verbs and status codes a client can rely on
Reading
Implement controllers that validate input and return typed responses
Reading
Handle exceptions with a problem-details error contract
Reading
Version an API and deprecate an endpoint without breaking clients
Reading
Paginate, filter and sort large collections efficiently
Reading
Document the API with OpenAPI so a frontend developer can consume it unaided
Reading
M5 — Spring Security and JWT Authentication
Configure Spring Security for a stateless REST service
Reading
Issue and validate JWT tokens with correct claims and expiry
Reading
Authenticate users against a database with BCrypt password hashing
Reading
Authorise by role and method-level restriction
Reading
Protect against session fixation, CSRF misuse and token leakage
Reading
Secure service-to-service calls with scoped tokens and key rotation
Reading
M6 — Persistence Design with JPA and Hibernate
Map entities, relationships and identifiers with JPA annotations
Reading
Write JPQL and native queries when the criteria API stops helping
Reading
Choose eager and lazy loading deliberately, and recognise lazy-loading exceptions
Reading
Diagnose and fix the N+1 query problem with fetch plans and projections
Reading
Use transactions, optimistic locking and versioning for concurrent writes
Reading
Apply database migrations and keep schema changes reversible
Reading
M7 — React with TypeScript on Top of the Spring API
Set up a React and TypeScript project with a typed build
Reading
Build components from state and props without framework folklore
Reading
Call the Spring API with typed clients and handle loading and error states
Reading
Manage forms, validation and optimistic updates on real endpoints
Reading
Add client-side routing, protected routes and session handling
Reading
Keep the front end accessible, responsive and tested at the component level
Reading
M8 — Capstone, Build and Deployment
Build a full-stack application with Spring Boot, MySQL and React
Reading
Profile the application and fix the queries and endpoints that slowed it down
Reading
Package the build with Maven and reproduce it from a clean machine
Reading
Containerise the API and the front end with Docker
Reading
Set up a CI pipeline that runs tests and publishes an image
Reading
Defend the capstone in a mock technical interview with code review feedback
Reading
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