SpringGraph

Write Spring. Catch wiring mistakes before startup.

SpringGraph is an annotation processor that checks a supported subset of Spring constructor injection while your code compiles. Spring keeps constructing your beans; SpringGraph adds nothing to the runtime.

error: SG001: No static binding found for com.example.PaymentGateway.

  Dependency path:
    com.example.OrderController
      -> com.example.OrderService
        -> com.example.PaymentGateway

Experimental

SpringGraph is in 0.x. The 0.1.0-rc.4 pre-release is on Maven Central as io.github.mrsluffy:springgraph-processor. See release history.

Start here

• Getting started: add the processor to Gradle or Maven, read the report, declare runtime boundaries
• Diagnostics: what every SG code means and how to fix it
• Support matrix: what is validated, what is reported as not validated

Where the project is

Current phase	Phase 5 (experimental release) finishing; Phase 7 (expansion) started
Validation gate (A)	Passed: useful diagnostics on four pilot applications
Construction gate (B)	Open: integration works, benefit never measured

See milestones for every phase, what was delivered, and what is left.

Principle

Ordinary Spring application code should remain ordinary Spring application code.

No business-code changes, no duplicated Boot configuration, no second container. When SpringGraph cannot tell what Spring would do, it says "not validated" instead of guessing.