ddd4j-boot Auto-Configuration

Overview

Covers AutoConfiguration, ConfigurationProperties, ConditionalOnClass/Property/MissingBean, imports, and destroyMethod uniformly, not split per artifact. Before use, confirm the maintenance line through ddd4j-boot-version-selection.

When to Use

• Writing or reviewing a *AutoConfiguration class for a ddd4j-boot feature module, including its conditions and configuration prefix.
• Deciding where user overrides apply: which defaults carry @ConditionalOnMissingBean and which properties back off.
• Wiring an "off switch" — a property that must skip the whole assembly, not just one bean.
• Checking registration metadata: Boot 2.x spring.factories versus Boot 3.x+ META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports.
• Auditing resource lifecycle: destroyMethod, resource ownership, failure rollback, and idempotent close.
• Diagnosing why a configuration class on the classpath produces no beans, or produces the wrong default.

When NOT to Use

Do not use this skill when: