Enforces Java and Spring Boot coding conventions covering naming, concurrency, validation, and testing.
npx skills add https://github.com/doccker/cc-use-exp --skill cc-java-dev
Please help me install this Agent Skill. Skill: cc-java-dev Source: https://github.com/doccker/cc-use-exp/tree/main/.codex/skills/cc-java-dev Command: npx skills add https://github.com/doccker/cc-use-exp --skill cc-java-dev
Java and Spring Boot codebases frequently suffer from recurring defects: N+1 queries, lost updates from read-modify-write races, silently ignored DTO fields, bean naming conflicts, and @Transactional annotations that fail due to self-invocation. This Skill gives the AI a concrete, example-driven rulebook so generated or reviewed Java code avoids these pitfalls from the start.
Ask the AI to write or review a Spring Boot service method, such as implementing a concurrent-safe points balance update with proper validation and tests.
High-intent search queries and answers about installing and using this skill.
Move repository calls out of loops by collecting IDs first, then running one batch query like findByIdIn, and matching results in memory via a Map. This reduces N database round-trips to one.
Avoid read-modify-write in Java code. Use an atomic SQL update such as UPDATE SET balance = balance + :delta, or add a @Version field for optimistic locking, with a unique index as the final guard.
Spring annotations work through AOP proxies, so this.method() bypasses the proxy and @Transactional is ignored. Fix it with self-injection using @Lazy, or move the method to a separate bean.
RestTemplate's default HttpURLConnection has compatibility issues with some CDN layers on POST requests, returning 412 or 403 with an empty body. Switch to java.net.http.HttpClient or configure Apache HttpClient via HttpComponentsClientHttpRequestFactory.
A common hidden cause is a @Bean(name=...) colliding with a @Service class's default bean name, so the wrong type gets registered. Rename the bean (e.g., XxxThreadPool) instead of enabling allow-bean-definition-overriding.
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