Ankur Mhatre
86246dc860
configuration-properties/ @ConfigurationProperties vs @Value on Spring Boot 4.1.1. The relaxed-binding matrix is generated by binding each spelling rather than transcribed, and re-checked against real processes -- the in-process probe was wrong twice before it was right. Records the three findings that came out of it: @Value does get relaxed resolution inside Spring Boot (Boot attaches ConfigurationPropertySources), the configuration processor silently stops generating metadata on JDK 23+ when declared as a plain dependency, and @Valid is not what makes nested constraints run. profiles-and-config/ Precedence, profiles, spring.config.import and config trees. /precedence reports every source holding a property in rank order with file and line, which turns "my profile file had no effect" into a two-line answer. Also pins the counterintuitive one: an imported file outranks the file that imported it. spring-aop/ Designators, proxy types, and aspects that do not fire. One advice per supported designator so the reference table is generated from real matches; all fourteen unsupported designators fed to the parser. Two corrections to the reference documentation: unsupported designators throw UnsupportedPointcutPrimitiveException (extends RuntimeException, not IllegalArgumentException), and spring-boot-starter-aop was renamed to spring-boot-starter-aspectj in Boot 4. 19 contract tests across the three modules, 15 captured transcripts, all regenerated by scripts/run-all.sh. Verified on Spring Boot 4.1.1, Spring Framework 7.0.9, JDK 25.0.4.1. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Gip4srpzMwjgoba6uEfbr5
44 lines
1.6 KiB
Plaintext
44 lines
1.6 KiB
Plaintext
== real process, real environment: binding demo.relaxed.api-key ==
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canonical property : demo.relaxed.api-key
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(MISS) means the property was not found and the declared default was used
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--- as an operating-system environment variable ---
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$ DEMO_RELAXED_API_KEY=secret-value java -jar target/configuration-properties-1.0.0.jar
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env-var-set : DEMO_RELAXED_API_KEY=secret-value
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@ConfigurationProps: secret-value
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@Value : secret-value
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Environment.get : secret-value
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$ DEMO_RELAXED_APIKEY=secret-value java -jar target/configuration-properties-1.0.0.jar
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env-var-set : DEMO_RELAXED_APIKEY=secret-value
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@ConfigurationProps: secret-value
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@Value : secret-value
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Environment.get : secret-value
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--- as a JVM system property (-D), i.e. the 'map' rows of the matrix ---
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$ java -Ddemo.relaxed.api-key=secret-value -jar target/configuration-properties-1.0.0.jar
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@ConfigurationProps: secret-value
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@Value : secret-value
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Environment.get : secret-value
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$ java -Ddemo.relaxed.apiKey=secret-value -jar target/configuration-properties-1.0.0.jar
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@ConfigurationProps: secret-value
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@Value : secret-value
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Environment.get : secret-value
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$ java -Ddemo.relaxed.apikey=secret-value -jar target/configuration-properties-1.0.0.jar
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@ConfigurationProps: secret-value
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@Value : secret-value
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Environment.get : secret-value
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$ java -Ddemo.relaxed.api.key=secret-value -jar target/configuration-properties-1.0.0.jar
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@ConfigurationProps: (unset)
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@Value : (MISS)
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Environment.get : (MISS)
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The last one is not a spelling of the property. api.key is two name elements;
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api-key is one. Nothing relaxed will ever join them.
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