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Backend Skill: Service Layer Patterns

Design Go backend service layers with constructor injection and Redis caching.

1|Updated Oct 15, 2025
Search Tags:#architecture#redis#go#dependency-injection#service-layer#esi
One-click install
npx skills add https://github.com/Sternrassler/eve-o-provit --skill backend-skill-service-layer-patterns
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Backend Skill: Service Layer Patterns
Source: https://github.com/Sternrassler/eve-o-provit/tree/main/.ai/skills/backend/service-layer-patterns
Command: npx skills add https://github.com/Sternrassler/eve-o-provit --skill backend-skill-service-layer-patterns

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill codifies a robust backend service layer that cleanly separates HTTP handling, business logic, and data access, enabling easier testing, maintenance, and evolution of complex Go services.

Core Features & Use Cases

  • Constructor Injection: Dependencies are injected via constructors, avoiding globals and enabling easy testing.
  • Interface-Driven Testing: Public interfaces facilitate mock implementations in tests.
  • Multi-Repository Orchestration: Coordinates multiple repositories and external services to implement business workflows.
  • Caching & Resilience: Integrates with Redis for caching and implements graceful degradation for external API failures (ESI).

Quick Start

Create a Go backend service by defining interfaces, implementing the service layer, and wiring dependencies with constructors. Example: initialize a service with an ESI client, a Redis client, and a logger, then call service methods with a context. Run go test ./... to validate behavior.

Frequently Asked Questions about Backend Skill: Service Layer Patterns

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I structure a Go service layer to separate HTTP handlers from repositories?▼

A Go service layer cleanly separates HTTP handling, business logic, and data access by codifying robust layer boundaries between handlers and repositories. This structure enables easier testing, maintenance, and evolution of complex backend services.

What is the best way to coordinate multiple repositories in a Go backend?▼

Coordinating multiple repositories in a Go backend is best handled by a service layer that orchestrates multiple repositories and external services. This approach implements complex business workflows while keeping data access logic cleanly separated.

How do I use constructor injection in Go for backend service testing?▼

Constructor injection in Go avoids globals by injecting dependencies like repositories and clients via constructors. This enables easy testing by allowing mock implementations of public interfaces to validate service layer behavior.

How do I implement graceful degradation when integrating external APIs like ESI in Go?▼

Graceful degradation for external API integration like ESI is implemented within the service layer by combining a clear caching strategy using Redis with resilient fallback logic. This ensures the Go backend remains stable during external service failures.

Does this service layer pattern support context propagation and metrics in Go?▼

Yes, the service layer pattern enforces context propagation, logging, and metrics collection throughout the Go backend service. These features are codified directly into the layer's design to ensure robust multi-repository coordination.

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