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bluetape4k

bluetape4k

Kotlin-first backend building blocks for Spring Boot, Ktor, Exposed, R2DBC, AWS, graph data, and production examples.
Get started View on GitHub Browse 90 module manuals

Build, Learn, Apply

Section titled “Build, Learn, Apply”

Start with a library, follow a runnable workshop, then carry the pattern into an application or benchmark. The atlas keeps those three layers visible without flattening the ecosystem into one long repository list.

Kotlin/JVM ecosystem

From building, to learning, to applying

Select a node to illuminate its repositories and learning path.

What bluetape4k Provides

Section titled “What bluetape4k Provides”
Application edgeSpring Boot and Ktor foundations for HTTP APIs, coroutine-first execution, WebFlux/MVC examples, and request flows.PersistenceExposed JDBC/R2DBC repositories, cache-backed data access, serialization, and database examples that keep persistence code consistent.IntegrationAWS SDK wrappers, Redis/Kafka patterns, graph database integrations, and infrastructure helpers for services that cross system boundaries.OperationsLeader election, scheduling gates, observability examples, virtual-thread experiments, and runtime coordination patterns.Domain utilitiesText processing, image pipelines, validation, logging, testing, coroutine helpers, and reusable Kotlin/JVM building blocks.Working examplesWorkshops and sample applications for Spring Boot, Ktor, R2DBC, Exposed, Timefold, scheduling, observability, and production-style backend flows.

Architecture Position Map

Section titled “Architecture Position Map”
Architecture position map for bluetape4k backend libraries
bluetape4k groups backend concerns by position: runtime edge, persistence, integrations, operations, foundations, and examples.
Application edgeSpring Boot and Ktor entry points for HTTP services.
PersistenceExposed JDBC/R2DBC repositories, caching, and serialization.
IntegrationAWS SDK wrappers, graph databases, Redis, Kafka, and infrastructure adapters.
OperationsLeader election, scheduling gates, observability, and runtime coordination.
Foundation modulesCore Kotlin utilities, coroutines, validation, text, image, and test support.
Example applicationsWorkshops and full examples showing how the modules compose.

Start With The BOM

Section titled “Start With The BOM”
dependencies {
    implementation(platform("io.github.bluetape4k:bluetape4k-dependencies:1.4.0"))
    implementation("io.github.bluetape4k:bluetape4k-core")
    implementation("io.github.bluetape4k:bluetape4k-coroutines")
}

Use the central dependency BOM first, then add the bluetape4k modules your service needs without module versions.

Open the quick start