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camundala.worker.WorkerDsl.scala Maven / Gradle / Ivy
package camundala
package worker
import camundala.bpmn.*
import camundala.domain.*
import camundala.worker.CamundalaWorkerError.*
import scala.reflect.ClassTag
trait WorkerDsl[In <: Product: InOutCodec, Out <: Product: InOutCodec]:
protected def engineContext: EngineContext
protected def logger: WorkerLogger
// needed that it can be called from CSubscriptionPostProcessor
def worker: Worker[In, Out, ?]
def topic: String = worker.topic
def runWorkFromWorker(in: In)(using EngineRunContext): Option[Either[RunWorkError, Out]] =
worker.runWorkHandler
.map: handler =>
handler.runWork(in)
def runWorkFromWorkerUnsafe(in: In)(using EngineRunContext): Either[RunWorkError, Out] =
runWorkFromWorker(in)
.get // only if you are sure that there is a handler
extension [T](option: Option[T])
def toEither[E <: CamundalaWorkerError](
error: E
): Either[E, T] =
option
.map(Right(_))
.getOrElse(
Left(error)
)
end extension // Option
end WorkerDsl
trait InitWorkerDsl[
In <: Product: InOutCodec,
Out <: Product: InOutCodec,
InitIn <: Product: InOutCodec,
InConfig <: Product: InOutCodec
] extends WorkerDsl[In, Out],
ValidateDsl[In],
InitProcessDsl[In, InitIn, InConfig]:
protected def inOutExample: Process[In, Out, InitIn]
lazy val worker: InitWorker[In, Out, InitIn] =
InitWorker(inOutExample)
.validate(ValidationHandler(validate))
.initProcess(InitProcessHandler(initProcess, inOutExample.processLabels))
end InitWorkerDsl
trait ValidationWorkerDsl[
In <: Product: InOutCodec
] extends WorkerDsl[In, NoOutput],
ValidateDsl[In]:
protected def inOutExample: ReceiveEvent[In, ?]
lazy val worker: InitWorker[In, NoOutput, In] =
InitWorker(inOutExample)
.validate(ValidationHandler(validate))
end ValidationWorkerDsl
trait CustomWorkerDsl[
In <: Product: InOutCodec,
Out <: Product: InOutCodec
] extends WorkerDsl[In, Out],
ValidateDsl[In],
RunWorkDsl[In, Out]:
protected def customTask: CustomTask[In, Out]
lazy val worker: CustomWorker[In, Out] =
CustomWorker(customTask)
.validate(ValidationHandler(validate))
.runWork(CustomHandler(runWork))
end CustomWorkerDsl
trait ServiceWorkerDsl[
In <: Product: InOutCodec,
Out <: Product: InOutCodec,
ServiceIn: InOutEncoder,
ServiceOut: InOutDecoder: ClassTag
] extends WorkerDsl[In, Out],
ValidateDsl[In],
RunWorkDsl[In, Out]:
lazy val worker: ServiceWorker[In, Out, ServiceIn, ServiceOut] =
ServiceWorker[In, Out, ServiceIn, ServiceOut](serviceTask)
.validate(ValidationHandler(validate))
.runWork(
ServiceHandler(
method,
apiUri,
querySegments,
inputMapper,
inputHeaders,
outputMapper,
serviceTask.defaultServiceOutMock,
serviceTask.serviceInExample
)
)
// required
protected def serviceTask: ServiceTask[In, Out, ServiceIn, ServiceOut]
protected def apiUri(in: In): Uri // input must be valid - so no errors
// optional
protected def method: Method = Method.GET
protected def querySegments(in: In): Seq[QuerySegmentOrParam] =
Seq.empty // input must be valid - so no errors
// mocking out from outService and headers
protected def inputMapper(in: In): Option[ServiceIn] = None // input must be valid - so no errors
protected def inputHeaders(in: In): Map[String, String] =
Map.empty // input must be valid - so no errors
protected def outputMapper(
serviceOut: ServiceResponse[ServiceOut],
in: In
): Either[ServiceMappingError, Out] = defaultOutMapper(serviceOut, in)
/** Run the Work is done by the handler. If you want a different behavior, you need to use the
* CustomWorkerDsl
*/
final def runWork(
inputObject: In
): Either[CustomError, Out] = Right(serviceTask.out)
private def defaultOutMapper(
serviceResponse: ServiceResponse[ServiceOut],
in: In
): Either[ServiceMappingError, Out] =
serviceResponse.outputBody match
case _: NoOutput => Right(serviceTask.out)
case Some(_: NoOutput) => Right(serviceTask.out)
case None => Right(serviceTask.out)
case _ =>
Left(ServiceMappingError(s"There is an outputMapper missing for '${getClass.getName}'."))
end defaultOutMapper
protected def queryKeys(ks: String*): Seq[QuerySegmentOrParam] =
ks.map(QuerySegmentOrParam.Key(_))
protected def queryKeyValues(kvs: (String, Any)*): Seq[QuerySegmentOrParam] =
kvs.map { case k -> v => QuerySegmentOrParam.KeyValue(k, s"$v") }
protected def queryValues(vs: Any*): Seq[QuerySegmentOrParam] =
vs.map(v => QuerySegmentOrParam.Value(s"$v"))
end ServiceWorkerDsl
private trait ValidateDsl[
In <: Product: InOutCodec
]:
def validate(in: In): Either[ValidatorError, In] = Right(in)
end ValidateDsl
private trait InitProcessDsl[
In <: Product: InOutCodec,
InitIn <: Product: InOutCodec,
InConfig <: Product: InOutCodec
]:
protected def engineContext: EngineContext
protected def customInit(in: In): InitIn
// by default the InConfig is initialized
final def initProcess(in: In): Either[InitProcessError, Map[String, Any]] =
val inConfig = in match
case i: WithConfig[?] =>
initConfig(
i.inConfig.asInstanceOf[Option[InConfig]],
i.defaultConfig.asInstanceOf[InConfig]
)
case _ => Map.empty
val custom = engineContext.toEngineObject(customInit(in))
Right(inConfig ++ custom)
end initProcess
/** initialize the config of the form of:
*
* ```
* case class InConfig(
* timerIdentificationNotReceived: Option[String :| Iso8601Duration],
* timerEBankingContractCheckOpened: Option[String :| CronExpr] =
* ...
* )
* ```
*/
private def initConfig(
optConfig: Option[InConfig],
defaultConfig: InConfig
): Map[String, Any] =
val defaultJson = defaultConfig.asJson
val r = optConfig.map {
config =>
val json = config.asJson
config.productElementNames
.map(k =>
k -> (json.hcursor
.downField(k).focus, defaultJson.hcursor
.downField(k).focus)
).collect {
case k -> (Some(j), Some(dj)) if j.isNull =>
k -> dj
case k -> (Some(j), _) =>
k -> j
case k -> (_, dj) =>
k -> dj.getOrElse(Json.Null)
}
.toMap
}.getOrElse { // get all defaults
defaultConfig.productElementNames
.map(k =>
k -> defaultJson.hcursor
.downField(k).focus
).collect {
case k -> Some(j) =>
k -> j
}
.toMap
}
engineContext.toEngineObject(r)
end initConfig
end InitProcessDsl
private trait RunWorkDsl[
In <: Product: InOutCodec,
Out <: Product: InOutCodec
]:
def runWork(
inputObject: In
): Either[CustomError, Out]
end RunWorkDsl
