@PreAuthorize
@PreAuthorize is a Spring Security annotation that evaluates an authorization expression before permitting an annotated method invocation.
Spring Security in Action, Second Edition
@PreAuthorize is a Spring Security annotation that authorizes a method invocation by evaluating a Spring Expression Language expression before the method runs.
- How it is used
- Protects service or other application-layer methods before invocation, extending authorization beyond endpoint rules.
- How deep it goes
- Demonstrates enabling method security, annotating methods, evaluating authorities and parameters, and testing allowed and denied calls.
- Examples
- Uses write-authorized users, a protected greeting service, secret-name ownership, Java listings, and cURL responses.
- What you can do after
- Operate method security by enabling it, writing SpEL rules, and testing permitted and forbidden invocations.
Read how Spring Security in Action, Second Edition explains @PreAuthorize →
Spring AI in Action
@PreAuthorize is a Spring Security annotation that permits a method invocation only when its authorization expression evaluates to true.
- How it is used
- Protects Spring bean methods, including LLM-invoked tools, from unauthorized execution.
- How deep it goes
- Explains configuration, SpEL evaluation, role checking, and failure behavior, while deferring other method-security annotations.
- Examples
- Uses getGameComplexity, the PREMIUM_USER role, Function.apply(), and authorized or refused Burger Battle requests.
- What you can do after
- Configure role-based method authorization for tools and prevent unauthorized invocations.
Related concepts
- Spring Expression Languageuses · Spring Expression Language is an expression language integrated with Spring for querying and manipulating object graphs and evaluating values, conditions, and configuration rules.
- @PostAuthorizealternative to · @PostAuthorize is a Spring Security annotation that evaluates an authorization expression after a method returns and can inspect or reject its result.
- AccessDeniedExceptionproduces · AccessDeniedException is a security exception indicating that an authorization check rejected access to a protected resource or operation.
- authorizationconfigures · Authorization is the determination and enforcement of rules governing which subjects may access resources or perform operations.
- preauthorizationused by · Preauthorization is authorization checking performed before a protected method executes, preventing the call when its conditions are not satisfied.
- method-level securityconfigures · Method-level security is authorization enforced on individual method invocations according to the caller’s identity or authorities.
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