Refactor a Java shipping quote workflow that grew into a long, fragile method. Use behavior-preserving steps to compose methods, move logic to better objects, replace primitive flags, simplify conditionals, remove side effects, and leave the service easier to test and change.
A practical refactoring walkthrough for a Java shipping quote service where duplicated switches, primitive strings, long methods, and god classes make each delivery change risky. Learn how to spot the smells, isolate behavior, and leave a smaller design that is easier to modify.
Refactor a Java booking workflow that accepts vague lists, strings, and mutable requests into clear domain types, focused interfaces, injected dependencies, and immutable objects so invalid states become harder to create and easier to review.
Refactor a fragile Java shipment workflow in small, behaviour-preserving steps. Extract readable methods, move logic to the right objects, replace primitive values, remove null checks and side effects, simplify conditions, and make future delivery options easier to add.
Refactor a fragile Java checkout workflow where duplicated rules, long methods, primitive values, repeated switches, and an oversized service force one business change across many files. Learn how to recognize the smells, move behaviour to the right objects, and reduce each future change to a focused edit.
Learn how to redesign a fragile Java reservation workflow so that intent is clear, invalid states are harder to create, dependencies are replaceable, and future changes do not spread across unrelated classes.
Learn how to improve a risky Java payment integration without mixing refactoring with feature work, breaking existing behaviour, or forcing a large rewrite. The tutorial covers impact analysis, risk assessment, incremental design changes, Branch by Abstraction, verification, and the decision between refactoring and rewriting.
Refactor an over-fetching event catalog endpoint by isolating the EF Core driver, projecting LINQ directly into DTOs, loading aggregates only for writes, inspecting generated queries, and using explicit transactions when a read and update must remain consistent.
Learn how to structure a Go service around models, ports, services, and adapters so business rules stay testable while databases, transports, and messaging tools remain replaceable.
Learn how hexagonal architecture separates business logic from technological details, making Java applications easier to change, test, and maintain.