Learn QUARKUS-SECURITY with Real Code Examples

Quarkus Security integrates seamlessly with Quarkus extensions like JWT, OAuth2, and LDAP for authentication and authorization.

Supports both imperative and reactive programming models.

Provides annotation-based security for methods and endpoints.

Easily configurable with properties and external identity providers.

Designed for low memory footprint and fast startup suitable for cloud-native deployments.

Endpoint security annotations (`@RolesAllowed`, `@Authenticated`)

Identity provider integration (OIDC, LDAP, custom)

JWT token verification and generation

Security context propagation in reactive streams

Custom identity and credential handling

Identity - the authenticated user or system

Credential - information proving identity (password, token, certificate)

Roles - permissions assigned to identities

Security context - runtime representation of identity and roles

Annotations - declarative way to secure methods/endpoints

src/main/java - application code including secured endpoints

src/main/resources - configuration files (`application.properties`)

src/test/java - security integration tests

pom.xml or build.gradle - dependency management

Optional security extensions directory for custom providers

Add necessary Quarkus Security extensions

Configure authentication mechanisms (JWT/OAuth2/etc.)

Secure endpoints using `@RolesAllowed` or `@Authenticated`

Implement custom identity providers if needed

Test and verify security flow in the application

Beginner: Secure single endpoint with basic authentication

Intermediate: JWT-based authentication with roles

Advanced: Reactive microservice with OAuth2 and JWT propagation

Expert: Multi-service environment with SSO via Keycloak

Enterprise: Cloud-native secured microservices with fine-grained RBAC

Quarkus Security vs Spring Security: Quarkus lightweight, cloud-native, reactive-ready; Spring mature with larger ecosystem

Quarkus Security vs Keycloak alone: Quarkus integrates authentication directly in code; Keycloak handles external SSO

Quarkus Security vs Micronaut Security: Both lightweight, Quarkus has native image support

Quarkus Security vs Apache Shiro: Quarkus better integrated with Quarkus ecosystem

Quarkus Security vs Node.js Passport.js: Quarkus Java-based, compiled, and reactive; Passport.js dynamic and Node-based

2019 - Initial Quarkus Security module introduced by Red Hat

2020 - Support for JWT authentication added

2021 - OIDC and Keycloak integration

2022 - Reactive security enhancements

2025 - Fully native-image optimized, cloud-native ready

Identity - authenticated user or system

Credential - proof of identity (password, token)

Role - permission assigned to an identity

Security context - runtime representation of identity

Annotations - declarative way to secure endpoints