ddd4j-javalin Runtime

Overview

Covers start, validate, initialize, SPI, readiness, drain, rollback, shutdown hook, and close uniformly. Confirm the maintenance line with ddd4j-javalin-version-selection first, then read the current branch source.

When to Use

• Implementing or reviewing Ddd4jJavalinRuntime and its start → validate → initialize → ready → drain → close path on 6.7.x, 7.1.x, or 7.2.x.
• Designing rollback after partial initialization: which JavalinLifecycleParticipants were initialized and in what reverse order they must close.
• Registering SPI providers and lifecycle participants, including required-versus-optional dependency semantics and readiness contribution.
• Implementing real configuration loading and startup validation that rejects invalid production configuration instead of falling back to defaults.
• Fixing shutdown-hook accumulation across repeated starts or embedded tests, or making close() idempotent.
• Separating aggregated readiness (DB, MQ, OIDC, Outbox) from process-only liveness.

When NOT to Use

Do not use this skill when: