Javalin Routing ExtensionsExtensible Routing Patterns

Multiple routing approaches for Javalin — annotations, DSL, and coroutines. Choose the pattern that fits your project, from annotation-driven routing to type-safe DSL with path parameters.

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Annotated Routing

Annotation-driven routing for Java and Kotlin. Define endpoints with @Get, @Post, and extract parameters with @Body, @Param, @Header, and more.

DSL Routing

Kotlin DSL with type-safe path parameters, in-place route definitions, and property-based route containers.

Coroutines Routing

Async and non-blocking endpoint execution using Kotlin coroutines with suspend lambdas and configurable dispatchers.

API Versioning

Built-in support for versioned endpoints via HTTP headers. Serve multiple API versions from the same codebase with @Version.

WebSocket Support

Register WebSocket endpoints alongside HTTP routes using @Ws in annotated routing, keeping all WS event listeners grouped together.

Extensible Architecture

Create custom DSL implementations tailored to your project. The modular design lets you mix and match routing approaches.