OpenAPI Generator Caching — Caching Generated Output for Faster Pipeline Execution

In this tutorial, you will learn about OpenAPI Generator Caching. We cover key concepts, practical examples, and best practices to help you master this topic.

OpenAPI Generator caching stores generated SDK output across CI runs, skipping regeneration when specs haven't changed, using content-addressable caching and incremental generation for faster pipeline execution.

What You'll Learn

• Content-addressable cache design
• Cache key computation from spec + config
• Cache invalidation strategies
• Distributed caching with Redis/S3
• Cache hit/miss metrics

flowchart LR
    A["Spec + Config"] --> B["Compute cache key (SHA256)"]
    B --> C{"Cache hit?"}
    C -->|"Yes"| D["Restore cached generation output"]
    C -->|"No"| E["Run full generation"]
    E --> F["Store output with cache key"]
    D --> G["Skip generation, use cached"]
    F --> G
    G --> H["Proceed to testing"]
    H --> I["Publish if tests pass"]

    J["Cache Storage (Redis/S3)"] --> C
    F --> J

What's Next

Implement caching in {{< ilink "OpenAPI" "OpenAPI Generator Performance" }} optimization and {{< ilink "OpenAPI" "OpenAPI Generator CI/CD" }} pipelines.