Technical University of Munich [IN2081]

Patterns in Software Engineering (Exam)

Outline

<aside>

• Algorithm vs pattern
• Software Engineering
  • Software Engineering (iPraktikum version)
• Structural Design Patterns (SDP)
• Behavioral Design Patterns (BDP)
• Creational Design Patterns (CDP)
• Architectural Patterns (AP)
• Antipattern (!A)
• Refactoring
• Testing Patterns (TP)
• Microservices
• Use Cases </aside>

Unknown Vocabulary

<aside>

• DSL - Domain-specific language (example: 1.Nf3 d5 2.c4 c6 3.b3 Bf5)
• SDP - Structural Design Patterns
• BDP - Behavioral Design Patterns
• CDP - Creational Design Patterns
• AP - Architectural Patterns
• TP - Testing Patterns
• !A - Antipatterns
• MS - Microservices </aside>

Status:

✅ - done, ❌ - todo,  🔄 - in process

Week 0.0✅ (Basics of UML and SE) Week 0✅ Repetition I (Composite, Facade, Bridge, Proxy, Adapter) Week 1✅ Introduction (Software Engineering) Week 2✅ Repetition II (Observer, Strategy, REST, Layered, Mock) Week 3✅ Design Patterns I (State, Template, Command, Mediator) Week 4✅ Design Patterns II (Factory, Abstract, Flyweight, Builder) Week 5✅ Architectural Patterns I (MVC, Broker, AI Agent) Week 6✅ Architectural Patterns II (REST, gRPC, Microservices) Week 7✅ Antipatterns I (Golden Hammer, Lava Flow, The Blob, Functional Decomposition) Week 8✅ Antipatterns II (Spaghetti Code, Ctrl+C & Ctlr+V, Vendor lock-in, Analysis Paralysis, Refactoring) Week 9✅ Testing Patterns I (EasyMock, Mockito, Reflection Test, Testing MVC) Week 10✅ Testing Patterns II (Dependency Injection with Guice, Spring, REST Testing) Week 11✅ Microservice Patterns I (Strangler, Decentralized, Circuit Breaker, Async Messages) Week 12✅ Microservice Patterns II (Blue-Green, Canary, Feature Toggles, Retry)

TODO

<aside>

• [ ]
  </aside>

<aside>

To provide a feedback or mark an errors,

please use this comment section →

</aside>

Basics of OOP

Relation Between Objects

Algorithm vs. pattern

Typical mistakes in software development

What do you have to do to kill a project?

• Show the same demo twice to the same audience
• Focus on technologies, not on problems and scenarios
• Don’t maintain consistency between releases
• Isolate team efforts from other teams within an organization
• Rewrite existing clients, servers and applications
• Change the purpose of the system so that models describe the wrong objects

The seven deadly sins in software practice

Software Engineering

Design Principles

Design Patterns

DP Overview (UML)

Creational Design patterns provide various object creation mechanisms, which increase flexibility and reuse of existing code

<aside>

Creational

Design Patterns

[CDP] Factory Method

[CDP] Abstract Factory

[CDP] Builder

</aside>

Factory vs Abstract Factory

Architectural Patterns

Antipattern