README.md

bee.functional

Functional Kotlin bindings, integration with DGS, bee.persistent & more

bee.functional

Predefined error types, extensions & more for com.github.michaelbull.result.Result.

typealias AppResult<V> = Result<V, AppError>

open class BadRequestError : AppError
open class InternalAppError : AppError

bee.functional.dgs

Adds support for result data fetchers.

@DgsQuery
fun bar(): Bar {
    return Bar(listOf("Bar"))
}

@DgsData(
    parentType = DgsConstants.BAR.TYPE_NAME,
    field = DgsConstants.BAR.Waldos
)
fun barWaldos(): AppResult<List<Waldo>> {
    return Err(BadRequestError("Bar"))
}

Redefines certain graphql invocations at runtime via ByteBuddy & provides custom exception handler in order to work.

⚠️ When Spring is started, an attempt is made to install a ByteBuddy agent. If this fails and is not supported by the JVM platform used, one can use the older error handling model.

One needs to provide a configuration based on the ResultFetcherAspectConfiguration class. This will create an aspect that handles DataFetcherResults like typical Results. Please note that the data fetcher must also return DataFetcherResult. One can convert a Result into one using the getDataFetcher() extension method. Directly returing a Result type is not supported in this model.

⚠️ Usage with data loader is currently evaluated and not supported. Please transform Results manually to Try if needed.

bee.functional.persistent

Provides @TransactionalResult annotation & corresponding aspect that provides JPA transactions support for methods that return a Result.

Based on the timeless @Transactional annotation from Spring.