Downloaded 98 times
![def routesModifiedSince(localDateTime: LocalDateTime):
DatabasePublisher[RouteRow] = {
}
val routesTable = TableQuery[RoutesTable]
val q = for {
routeRow <- routesTable
if (routeRow.createdAt > localDateTime
| routeRow.deletedAt > localDateTime)
} yield routeRow
db.stream {
q.result
}](https://image.slidesharecdn.com/buildingareactiverestfulapiwithakkahttpslick-151106092135-lva1-app6891/85/Building-a-Reactive-RESTful-API-with-Akka-Http-Slick-32-320.jpg)
![import akka.stream.scaladsl.Source
def findRoutesModifiedSince(localDateTime: LocalDateTime):
Source[Route, Unit] = {
}
Source(
).mapConcat(_.toList)
routesRepo.selectModifiedSince(localDateTime).mapResult { row =>
}
row.id.map { id =>
Route(
id = id,
route = row.routeJson.parseJson.convertTo[NewRoute],
row.createdAt,
row.deletedAt
)
}](https://image.slidesharecdn.com/buildingareactiverestfulapiwithakkahttpslick-151106092135-lva1-app6891/85/Building-a-Reactive-RESTful-API-with-Akka-Http-Slick-34-320.jpg)
(implicit writer: JsonWriter[T]):
Source[ChunkStreamPart, ((Unit, Unit), Unit)] = {
val commaSeparatedRoutes: Source[ChunkStreamPart, Unit] =
source
.map(t => Some(t.toJson.compactPrint))
.scan[Option[ChunkStreamPart]](None)({
case (None, Some(sourceElement)) => Some(ChunkStreamPart(sourceElement))
case (_, Some(sourceElement)) => Some(ChunkStreamPart(s", $sourceElement"))
})
.mapConcat(_.toList)
Source.single(ChunkStreamPart("[")) ++
commaSeparatedRoutes ++
Source.single(ChunkStreamPart("]"))
}](https://image.slidesharecdn.com/buildingareactiverestfulapiwithakkahttpslick-151106092135-lva1-app6891/85/Building-a-Reactive-RESTful-API-with-Akka-Http-Slick-39-320.jpg)
![val route: RequestContext => Future[RouteResult] =
authenticationToken { token =>
authenticate(token, authService) { authenticatedUser =>
path("updated-routes" / Rest) { lastModifiedString =>
get {
hasOneOfTheScopes(authenticatedUser)(scopes.READ) {
...](https://image.slidesharecdn.com/buildingareactiverestfulapiwithakkahttpslick-151106092135-lva1-app6891/85/Building-a-Reactive-RESTful-API-with-Akka-Http-Slick-42-320.jpg)
![import akka.http.scaladsl._
import akka.http.scaladsl.server.directives.HeaderDirectives._
trait OAuthDirectives {
def authenticationToken: Directive1[String] =
headerValue(optionalValue("authorization")) |
reject {
AuthenticationFailedRejection(
CredentialsMissing,
HttpChallenge("", "")
)
}
...](https://image.slidesharecdn.com/buildingareactiverestfulapiwithakkahttpslick-151106092135-lva1-app6891/85/Building-a-Reactive-RESTful-API-with-Akka-Http-Slick-43-320.jpg)
![def routesModifiedSince(localDateTime: LocalDateTime):
DatabasePublisher[RouteRow] = {
}
val routesTable = TableQuery[RoutesTable]
val q = for {
routeRow <- routesTable
if (routeRow.createdAt > localDateTime
| routeRow.deletedAt > localDateTime)
} yield routeRow
db.stream {
q.result
}](https://image.slidesharecdn.com/buildingareactiverestfulapiwithakkahttpslick-151106092135-lva1-app6891/75/Building-a-Reactive-RESTful-API-with-Akka-Http-Slick-32-2048.jpg)
![import akka.stream.scaladsl.Source
def findRoutesModifiedSince(localDateTime: LocalDateTime):
Source[Route, Unit] = {
}
Source(
).mapConcat(_.toList)
routesRepo.selectModifiedSince(localDateTime).mapResult { row =>
}
row.id.map { id =>
Route(
id = id,
route = row.routeJson.parseJson.convertTo[NewRoute],
row.createdAt,
row.deletedAt
)
}](https://image.slidesharecdn.com/buildingareactiverestfulapiwithakkahttpslick-151106092135-lva1-app6891/75/Building-a-Reactive-RESTful-API-with-Akka-Http-Slick-34-2048.jpg)
(implicit writer: JsonWriter[T]):
Source[ChunkStreamPart, ((Unit, Unit), Unit)] = {
val commaSeparatedRoutes: Source[ChunkStreamPart, Unit] =
source
.map(t => Some(t.toJson.compactPrint))
.scan[Option[ChunkStreamPart]](None)({
case (None, Some(sourceElement)) => Some(ChunkStreamPart(sourceElement))
case (_, Some(sourceElement)) => Some(ChunkStreamPart(s", $sourceElement"))
})
.mapConcat(_.toList)
Source.single(ChunkStreamPart("[")) ++
commaSeparatedRoutes ++
Source.single(ChunkStreamPart("]"))
}](https://image.slidesharecdn.com/buildingareactiverestfulapiwithakkahttpslick-151106092135-lva1-app6891/75/Building-a-Reactive-RESTful-API-with-Akka-Http-Slick-39-2048.jpg)
![val route: RequestContext => Future[RouteResult] =
authenticationToken { token =>
authenticate(token, authService) { authenticatedUser =>
path("updated-routes" / Rest) { lastModifiedString =>
get {
hasOneOfTheScopes(authenticatedUser)(scopes.READ) {
...](https://image.slidesharecdn.com/buildingareactiverestfulapiwithakkahttpslick-151106092135-lva1-app6891/75/Building-a-Reactive-RESTful-API-with-Akka-Http-Slick-42-2048.jpg)
![import akka.http.scaladsl._
import akka.http.scaladsl.server.directives.HeaderDirectives._
trait OAuthDirectives {
def authenticationToken: Directive1[String] =
headerValue(optionalValue("authorization")) |
reject {
AuthenticationFailedRejection(
CredentialsMissing,
HttpChallenge("", "")
)
}
...](https://image.slidesharecdn.com/buildingareactiverestfulapiwithakkahttpslick-151106092135-lva1-app6891/75/Building-a-Reactive-RESTful-API-with-Akka-Http-Slick-43-2048.jpg)
Uploaded byZalando Technology
Building a Reactive RESTful API with Akka Http & Slick
The document discusses the development of a reactive RESTful API using Akka HTTP and Slick by Dan Persa, aimed at enhancing scalability and efficiency for Zalando's online fashion platform. It details the architectural choices, including microservices, non-blocking I/O, and the use of Akka Streams for handling data. Additionally, it covers implementation aspects such as route definitions, OAuth authentication, and deployment practices in a Docker environment.
More Related Content
Similar to Building a Reactive RESTful API with Akka Http & Slick
Building a Reactive RESTful API with Akka Http & Slick
- 1. Codemotion 2015, Berlin, Germany Buildinga Reactive RESTful API with Akka Http & Slick Dan Persa - @danpersa
- 2. Dan Persa ● SeniorSoftware Engineer ● Twitter: @danpersa ● dan.persa@zalando.de
- 3. EUROPE’S LEADING ONLINEFASHION PLATFORM 15 countries 3 fulfillment centers 16+ million active customers 2.2+ billion € revenue 2014 130+ million visits per month 9.000+ employees Visit us: tech.zalando.com
- 6.
- 9.
- 11. Conway’s Law “organizations whichdesign systems ...are constrained to produce designs which are copies of the communication structures of these organizations”
- 12.
- 13.
- 15.
- 16.
- 17. Thousands of Javaclasses, undocumented features Business logic on all layers (including the database)
- 18.
- 19.
- 20.
- 21.
- 22.
- 23. FORMAL SPECIFICATION FOR RESTful APIs The World'sMost Popular Framework for APIs.
- 25. REST RESOURCES GET /routes GET/routes/{id} POST /routes DELETE /routes/{id} GET /updated- routes/{id}
- 26.
- 28. MODEL DBCONTROLLER BUFFERBUFFER DB RecordsDTOsJSON CLIENT TRADITIONALAPPLICATION HTTP Request Method Call SQL Blocking IO
- 29. MODEL DBCONTROLLER DB StreamDTOsJSON CLIENT REACTIVEAPPLICATION HTTP Request Method Call SQL Non-Blocking IO StreamStreamStream
- 30.
- 31. Separation of I/0 Resilience ReactiveStreams Meet
- 32. def routesModifiedSince(localDateTime: LocalDateTime): DatabasePublisher[RouteRow]= { } val routesTable = TableQuery[RoutesTable] val q = for { routeRow <- routesTable if (routeRow.createdAt > localDateTime | routeRow.deletedAt > localDateTime) } yield routeRow db.stream { q.result }
- 33.
- 34. import akka.stream.scaladsl.Source def findRoutesModifiedSince(localDateTime:LocalDateTime): Source[Route, Unit] = { } Source( ).mapConcat(_.toList) routesRepo.selectModifiedSince(localDateTime).mapResult { row => } row.id.map { id => Route( id = id, route = row.routeJson.parseJson.convertTo[NewRoute], row.createdAt, row.deletedAt ) }
- 35. val route = path("hello"){ get { complete { <h1>Hello World</h1> } } } Meet Http
- 36. object Main extendsApp { } implicit val system = ActorSystem("my-system") implicit val materializer = ActorMaterializer() val route = ... val bindingFuture = Http().bindAndHandle(route, "localhost", 8080) ...
- 37. Innkeeper’s AKKA HTTPRoutes val route = path("updated-routes" / Rest) { lastModifiedString => get { complete(…) } } ~ path("routes") { get { complete(…) } ~ post { complete(…) } } ~ path("routes" / LongNumber) { id => get { … } ~ delete { … } }
- 38. path("routes") { get { complete{ HttpResponse( ) } } } entity = HttpEntity.Chunked( MediaTypes.`application/json`, chunkedStreamSource ) val chunkedStreamSource = jsonService.sourceToJsonSource(routesService.allRoutes)
- 39. def sourceToJsonSource[T](source: Source[T,Unit]) (implicit writer: JsonWriter[T]): Source[ChunkStreamPart, ((Unit, Unit), Unit)] = { val commaSeparatedRoutes: Source[ChunkStreamPart, Unit] = source .map(t => Some(t.toJson.compactPrint)) .scan[Option[ChunkStreamPart]](None)({ case (None, Some(sourceElement)) => Some(ChunkStreamPart(sourceElement)) case (_, Some(sourceElement)) => Some(ChunkStreamPart(s", $sourceElement")) }) .mapConcat(_.toList) Source.single(ChunkStreamPart("[")) ++ commaSeparatedRoutes ++ Source.single(ChunkStreamPart("]")) }
- 40.
- 41.
- 42. val route: RequestContext=> Future[RouteResult] = authenticationToken { token => authenticate(token, authService) { authenticatedUser => path("updated-routes" / Rest) { lastModifiedString => get { hasOneOfTheScopes(authenticatedUser)(scopes.READ) { ...
- 43. import akka.http.scaladsl._ import akka.http.scaladsl.server.directives.HeaderDirectives._ traitOAuthDirectives { def authenticationToken: Directive1[String] = headerValue(optionalValue("authorization")) | reject { AuthenticationFailedRejection( CredentialsMissing, HttpChallenge("", "") ) } ...
- 44.
- 45.
- 46. FROM zalando/openjdk:8u45-b14-5 MAINTAINER TeamSpearheads <team-spearheads@zalando.de> EXPOSE 8080 RUN mkdir -p /opt/innkeeper ADD target/scala-2.11/innkeeper-assembly-0.0.1.jar /opt/innkeeper/ WORKDIR /opt/innkeeper ENTRYPOINT java $(java-dynamic-memory-opts) -Dinnkeeper.env=prod -server -jar innkeeper-assembly-0.0.1.jar
- 47. docker: sbt assembly docker build-t innkeper:latest-SNAPSHOT . docker-push: docker push innkeper:latest-SNAPSHOT docker-run: docker run -p 8080:8080 -t innkeper:latest-SNAPSHOT test-db: docker run -e POSTGRES_PASSWORD=innkeeper-test -e POSTGRES_USER=innkeeper-test -p 5433:5432 postgres:9.4 tick: senza create senza.yaml tick latest-SNAPSHOT tock: senza create senza.yaml tock latest-SNAPSHOT
- 48.
- 49.
- 50.
- 51.
- 54. # use Docker-basedcontainer (instead of OpenVZ) sudo: false cache: directories: - $HOME/.sbt - $HOME/.ivy2 language: scala script: - sbt ++$TRAVIS_SCALA_VERSION test - sbt ++$TRAVIS_SCALA_VERSION it:test # Trick to avoid unnecessary cache updates - find $HOME/.sbt -name "*.lock" | xargs rm scala: - 2.11.7 jdk: - oraclejdk8 addons: postgresql: "9.4" before_script: - psql -c 'CREATE ROLE innkeepertest superuser login createdb;' -U postgres - psql -c 'CREATE DATABASE innkeepertest;' -U postgres
- 55.
- 56.
- 57.
- 58. Where to FindUs: Tech Blog: tech.zalando.com GitHub: github.com/zalando Innkeeper: github.com/zalando/innkeeper Twitter: @ZalandoTech Instagram: zalandotech Jobs: http://tech.zalando.com/jobs
- 59.