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Add trailers metadata support to clientStreaming and noStreaming
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176
codegen/src/main/scala/fs2/grpc/codegen/Fs2AbstractServicePrinter.scala
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| /* | ||
| * Copyright (c) 2018 Gary Coady / Fs2 Grpc Developers | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
| * this software and associated documentation files (the "Software"), to deal in | ||
| * the Software without restriction, including without limitation the rights to | ||
| * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of | ||
| * the Software, and to permit persons to whom the Software is furnished to do so, | ||
| * subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in all | ||
| * copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS | ||
| * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR | ||
| * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | ||
| * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
| */ | ||
|
|
||
| package fs2.grpc.codegen | ||
|
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| import com.google.protobuf.Descriptors.{MethodDescriptor, ServiceDescriptor} | ||
| import fs2.grpc.codegen.Fs2AbstractServicePrinter.constants.{ | ||
| Async, | ||
| Channel, | ||
| ClientOptions, | ||
| Companion, | ||
| Ctx, | ||
| Dispatcher, | ||
| Fs2ClientCall, | ||
| Fs2ServerCallHandler, | ||
| Metadata, | ||
| ServerOptions, | ||
| ServerServiceDefinition, | ||
| Stream | ||
| } | ||
| import scalapb.compiler.{DescriptorImplicits, FunctionalPrinter} | ||
| import scalapb.compiler.FunctionalPrinter.PrinterEndo | ||
|
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| abstract class Fs2AbstractServicePrinter extends Fs2ServicePrinter { | ||
|
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| val service: ServiceDescriptor | ||
| val serviceSuffix: String | ||
| val di: DescriptorImplicits | ||
|
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| import di._ | ||
|
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| private[this] val serviceName: String = service.name | ||
| private[this] val serviceNameFs2: String = s"$serviceName${serviceSuffix}" | ||
| private[this] val servicePkgName: String = service.getFile.scalaPackage.fullName | ||
|
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| protected def serviceMethodSignature(method: MethodDescriptor): String | ||
|
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| protected[this] def handleMethod(method: MethodDescriptor): String | ||
|
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| private[this] def createClientCall(method: MethodDescriptor) = { | ||
| val basicClientCall = | ||
| s"$Fs2ClientCall[F](channel, ${method.grpcDescriptor.fullName}, dispatcher, clientOptions)" | ||
| if (method.isServerStreaming) | ||
| s"$Stream.eval($basicClientCall)" | ||
| else | ||
| basicClientCall | ||
| } | ||
|
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| private[this] def serviceMethodImplementation(method: MethodDescriptor): PrinterEndo = { p => | ||
| val mkMetadata = if (method.isServerStreaming) s"$Stream.eval(mkMetadata(ctx))" else "mkMetadata(ctx)" | ||
|
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| p.add(serviceMethodSignature(method) + " = {") | ||
| .indent | ||
| .add(s"$mkMetadata.flatMap { m =>") | ||
| .indent | ||
| .add(s"${createClientCall(method)}.flatMap(_.${handleMethod(method)}(request, m))") | ||
| .outdent | ||
| .add("}") | ||
| .outdent | ||
| .add("}") | ||
| } | ||
|
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| private[this] def serviceBindingImplementation(method: MethodDescriptor): PrinterEndo = { p => | ||
| val inType = method.inputType.scalaType | ||
| val outType = method.outputType.scalaType | ||
| val descriptor = method.grpcDescriptor.fullName | ||
| val handler = s"$Fs2ServerCallHandler[F](dispatcher, serverOptions).${handleMethod(method)}[$inType, $outType]" | ||
|
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| val serviceCall = s"serviceImpl.${method.name}" | ||
| val eval = if (method.isServerStreaming) s"$Stream.eval(mkCtx(m))" else "mkCtx(m)" | ||
|
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| p.add(s".addMethod($descriptor, $handler((r, m) => $eval.flatMap($serviceCall(r, _))))") | ||
| } | ||
|
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| private[this] def serviceMethods: PrinterEndo = _.seq(service.methods.map(serviceMethodSignature)) | ||
|
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| private[this] def serviceMethodImplementations: PrinterEndo = | ||
| _.call(service.methods.map(serviceMethodImplementation): _*) | ||
|
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| private[this] def serviceBindingImplementations: PrinterEndo = | ||
| _.indent | ||
| .add(s".builder(${service.grpcDescriptor.fullName})") | ||
| .call(service.methods.map(serviceBindingImplementation): _*) | ||
| .add(".build()") | ||
| .outdent | ||
|
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| private[this] def serviceTrait: PrinterEndo = | ||
| _.add(s"trait $serviceNameFs2[F[_], $Ctx] {").indent.call(serviceMethods).outdent.add("}") | ||
|
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| private[this] def serviceObject: PrinterEndo = | ||
| _.add(s"object $serviceNameFs2 extends $Companion[$serviceNameFs2] {").indent.newline | ||
| .call(serviceClient) | ||
| .newline | ||
| .call(serviceBinding) | ||
| .outdent | ||
| .newline | ||
| .add("}") | ||
|
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| private[this] def serviceClient: PrinterEndo = { | ||
| _.add( | ||
| s"def mkClient[F[_]: $Async, $Ctx](dispatcher: $Dispatcher[F], channel: $Channel, mkMetadata: $Ctx => F[$Metadata], clientOptions: $ClientOptions): $serviceNameFs2[F, $Ctx] = new $serviceNameFs2[F, $Ctx] {" | ||
| ).indent | ||
| .call(serviceMethodImplementations) | ||
| .outdent | ||
| .add("}") | ||
| } | ||
|
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| private[this] def serviceBinding: PrinterEndo = { | ||
| _.add( | ||
| s"protected def serviceBinding[F[_]: $Async, $Ctx](dispatcher: $Dispatcher[F], serviceImpl: $serviceNameFs2[F, $Ctx], mkCtx: $Metadata => F[$Ctx], serverOptions: $ServerOptions): $ServerServiceDefinition = {" | ||
| ).indent | ||
| .add(s"$ServerServiceDefinition") | ||
| .call(serviceBindingImplementations) | ||
| .outdent | ||
| .add("}") | ||
| } | ||
|
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| // / | ||
|
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| def printService(printer: FunctionalPrinter): FunctionalPrinter = { | ||
| printer | ||
| .add(s"package $servicePkgName", "", "import _root_.cats.syntax.all._", "") | ||
| .call(serviceTrait) | ||
| .newline | ||
| .call(serviceObject) | ||
| } | ||
| } | ||
|
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| object Fs2AbstractServicePrinter { | ||
| private[codegen] object constants { | ||
|
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| private val effPkg = "_root_.cats.effect" | ||
| private val fs2Pkg = "_root_.fs2" | ||
| private val fs2grpcPkg = "_root_.fs2.grpc" | ||
| private val grpcPkg = "_root_.io.grpc" | ||
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| // / | ||
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| val Ctx = "A" | ||
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| val Async = s"$effPkg.Async" | ||
| val Resource = s"$effPkg.Resource" | ||
| val Dispatcher = s"$effPkg.std.Dispatcher" | ||
| val Stream = s"$fs2Pkg.Stream" | ||
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| val Fs2ServerCallHandler = s"$fs2grpcPkg.server.Fs2ServerCallHandler" | ||
| val Fs2ClientCall = s"$fs2grpcPkg.client.Fs2ClientCall" | ||
| val ClientOptions = s"$fs2grpcPkg.client.ClientOptions" | ||
| val ServerOptions = s"$fs2grpcPkg.server.ServerOptions" | ||
| val Companion = s"$fs2grpcPkg.GeneratedCompanion" | ||
|
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| val ServerServiceDefinition = s"$grpcPkg.ServerServiceDefinition" | ||
| val Channel = s"$grpcPkg.Channel" | ||
| val Metadata = s"$grpcPkg.Metadata" | ||
|
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| } | ||
|
|
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| } |
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58 changes: 58 additions & 0 deletions
58
codegen/src/main/scala/fs2/grpc/codegen/Fs2GrpcExhaustiveTrailersServicePrinter.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| /* | ||
| * Copyright (c) 2018 Gary Coady / Fs2 Grpc Developers | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
| * this software and associated documentation files (the "Software"), to deal in | ||
| * the Software without restriction, including without limitation the rights to | ||
| * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of | ||
| * the Software, and to permit persons to whom the Software is furnished to do so, | ||
| * subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in all | ||
| * copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS | ||
| * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR | ||
| * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | ||
| * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
| */ | ||
|
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| package fs2.grpc.codegen | ||
|
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| import com.google.protobuf.Descriptors.{MethodDescriptor, ServiceDescriptor} | ||
| import scalapb.compiler.{DescriptorImplicits, StreamType} | ||
|
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| class Fs2GrpcExhaustiveTrailersServicePrinter( | ||
| val service: ServiceDescriptor, | ||
| val serviceSuffix: String, | ||
| val di: DescriptorImplicits | ||
| ) extends Fs2AbstractServicePrinter { | ||
| import fs2.grpc.codegen.Fs2AbstractServicePrinter.constants._ | ||
| import di._ | ||
|
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| override protected def serviceMethodSignature(method: MethodDescriptor): String = { | ||
|
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| val scalaInType = method.inputType.scalaType | ||
| val scalaOutType = method.outputType.scalaType | ||
| val ctx = s"ctx: $Ctx" | ||
|
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| s"def ${method.name}" + (method.streamType match { | ||
| case StreamType.Unary => s"(request: $scalaInType, $ctx): F[($scalaOutType, $Metadata)]" | ||
| case StreamType.ClientStreaming => s"(request: $Stream[F, $scalaInType], $ctx): F[($scalaOutType, $Metadata)]" | ||
| case StreamType.ServerStreaming => s"(request: $scalaInType, $ctx): $Stream[F, $scalaOutType]" | ||
| case StreamType.Bidirectional => s"(request: $Stream[F, $scalaInType], $ctx): $Stream[F, $scalaOutType]" | ||
| }) | ||
| } | ||
|
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| override protected def handleMethod(method: MethodDescriptor): String = { | ||
| method.streamType match { | ||
| case StreamType.Unary => "unaryToUnaryCallTrailers" | ||
| case StreamType.ClientStreaming => "streamingToUnaryCallTrailers" | ||
| case StreamType.ServerStreaming => "unaryToStreamingCall" | ||
| case StreamType.Bidirectional => "streamingToStreamingCall" | ||
| } | ||
| } | ||
|
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| } |
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