Problem Solving Overview
Entry point for the problem-solving documentation.
For high-level project overview, see README.md.
Table of Contents
- Background
- Reference Commits
- Applied Industry Conventions
- Design Patterns (GoF)
- DDD Concepts
- Document Navigation
- Results Explanation (What)
- Implementation Process (How)
- Deep Dive Analysis
- Reference
1. Background
1.1 Purpose
This documentation is a post-refactoring analysis of intuitive problem-solving done during VARLab Co-op.
| What I Did | What This Document Does |
|---|---|
| Refactored 5 monolithic pipelines into 4-Layer Architecture | Classify and define those intuitive fixes using industry conventions |
| Designed 3-Level Logger System | Analyze why the design worked and how it integrates with the architecture |
Goal: Transform experience-based understanding into systematic, reusable knowledge
- Learn how problems I "felt" are formally named and classified
- Validate solutions against established principles (Design Patterns, DDD)
- Understand integration points that made the architecture work
2. Reference Commits
| State | Commit Hash | Date |
|---|---|---|
| Before (Baseline) | 74fc356 |
2025-03-20 |
| After (Final) | ff74ac8 |
2025-05-12 |
Duration: 54 days (Library setup 35 days, Core refactoring ~2 weeks)
3. Applied Industry Conventions
3.1 Design Patterns (GoF)
Patterns identified in the refactored architecture:
| Pattern | Where Applied | Purpose |
|---|---|---|
| Command | GitLibrary, ShellLibrary, SSHShellLibrary | Encapsulate shell commands as Closure objects |
| Facade | logger, shellScriptHelper | Hide Jenkins DSL complexity behind simple API |
| Adapter | shellScriptHelper | Convert (Closure, args) → Map for Jenkins sh() |
Data Source: solution-by-layer.md Section 4
3.2 DDD Concepts
Post-refactoring analysis found alignment with some DDD organizational principles:
| Pattern | Alignment | Notes |
|---|---|---|
| Layered Architecture | ✓ Applied | 4-layer separation (Entry → Orchestration → Infrastructure → Module) |
| Modules | ✓ Applied | GitLibrary, ShellLibrary, SSHShellLibrary as cohesive units |
| Infrastructure Service | Partial | Concept exists, implemented as GoF Facade |
Not a full DDD implementation due to stateless pipeline environment.
Data Source: domain-driven-analysis.md
4. Document Navigation
4.1 Results Explanation (What)
| Document | Description |
|---|---|
| solution-by-feature.md | Feature-by-feature breakdown: API Migration, Shell Libraries, Stage Modularization, Testability, Logger |
| solution-by-layer.md | Layer-by-layer architecture analysis, Design Patterns |
4.2 Implementation Process (How)
| Phase | Document | Key Achievements |
|---|---|---|
| 0 | phase-0/.../changelog.md | Library infrastructure, vars/ folder |
| 1 | phase-1/.../changelog.md | ShellScript Helper, Stage modularization |
| 2 | phase-2/.../changelog.md | 3-Level Logger (Stage/StepsGroup/Step) |
| 3 | phase-3/.../changelog.md | HttpApiService, GitLibrary, ShellLibrary |
| 4 | phase-4/.../changelog.md | All Stage modules, SSHShellLibrary |
4.3 Deep Dive Analysis
| Document | Description |
|---|---|
| logger-system-design-integration.md | 3-Level Logger design: Problem → Solution → Architecture integration |
| domain-driven-analysis.md | DDD pattern analysis: Layered Architecture, Modules (applied), Intention-Revealing Interfaces (not applied) |
5. Reference
Repository
- GitHub: devops-jenkins-linux