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Code Issues Pull requests Projects Releases 6 Packages Wiki Activity Actions 10

=str #16549 doc: Integration with External Services

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This commit is contained in:
Patrik Nordwall 2014-12-18 10:34:59 +01:00
parent ef2835d60e
commit fdbd19e302
7 changed files with 636 additions and 56 deletions
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56
akka-docs-dev/rst/scala/code/docs/stream/TwitterStreamQuickstartDocSpec.scala
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@ -26,23 +26,40 @@ import concurrent.Future
import akka.stream.testkit.AkkaSpec
// TODO replace ⇒ with => and disable this intellij setting
class TwitterStreamQuickstartDocSpec extends AkkaSpec {
implicit val executionContext = system.dispatcher
object TwitterStreamQuickstartDocSpec {
//#model
final case class Author(handle: String)
val AkkaTeam = Author("akkateam")
val Akka = Hashtag("#akka")
final case class Hashtag(name: String)
final case class Tweet(author: Author, timestamp: Long, body: String) {
def hashtags: List[Hashtag] =
body.split(" ").toList.collect { case t if t.startsWith("#") ⇒ Hashtag(t) }
def hashtags: Set[Hashtag] =
body.split(" ").collect { case t if t.startsWith("#") ⇒ Hashtag(t) }.toSet
}
//#model
val tweets = Source(
Tweet(Author("rolandkuhn"), (new Date).getTime, "#akka rocks!") ::
Tweet(Author("patriknw"), (new Date).getTime, "#akka !") ::
Tweet(Author("bantonsson"), (new Date).getTime, "#akka !") ::
Tweet(Author("drewhk"), (new Date).getTime, "#akka !") ::
Tweet(Author("ktosopl"), (new Date).getTime, "#akka on the rocks!") ::
Tweet(Author("mmartynas"), (new Date).getTime, "wow #akka !") ::
Tweet(Author("akkateam"), (new Date).getTime, "#akka rocks!") ::
Tweet(Author("bananaman"), (new Date).getTime, "#bananas rock!") ::
Tweet(Author("appleman"), (new Date).getTime, "#apples rock!") ::
Tweet(Author("drama"), (new Date).getTime, "we compared #apples to #oranges!") ::
Nil)
}
// TODO replace ⇒ with => and disable this intellij setting
class TwitterStreamQuickstartDocSpec extends AkkaSpec {
import TwitterStreamQuickstartDocSpec._
implicit val executionContext = system.dispatcher
trait Example0 {
//#tweet-source
val tweets: Source[Tweet]
@ -56,33 +73,20 @@ class TwitterStreamQuickstartDocSpec extends AkkaSpec {
//#materializer-setup
}
val tweets = Source(
Tweet(Author("rolandkuhn"), (new Date).getTime, "#akka rocks!") ::
Tweet(Author("patriknw"), (new Date).getTime, "#akka!") ::
Tweet(Author("bantonsson"), (new Date).getTime, "#akka!") ::
Tweet(Author("drewhk"), (new Date).getTime, "#akka!") ::
Tweet(Author("ktosopl"), (new Date).getTime, "#akka on the rocks!") ::
Tweet(Author("mmartynas"), (new Date).getTime, "wow #akka!") ::
Tweet(Author("akkateam"), (new Date).getTime, "#akka rocks!") ::
Tweet(Author("bananaman"), (new Date).getTime, "#bananas rock!") ::
Tweet(Author("appleman"), (new Date).getTime, "#apples rock!") ::
Tweet(Author("drama"), (new Date).getTime, "we compared #apples to #oranges!") ::
Nil)
implicit val mat = FlowMaterializer()
"filter and map" in {
//#authors-filter-map
val authors: Source[Author] =
tweets
.filter(_.hashtags.contains("#akka"))
.filter(_.hashtags.contains(Akka))
.map(_.author)
//#authors-filter-map
trait Example3 {
//#authors-collect
val authors: Source[Author] =
tweets.collect { case t if t.hashtags.contains("#akka") ⇒ t.author }
tweets.collect { case t if t.hashtags.contains(Akka) ⇒ t.author }
//#authors-collect
}
@ -97,7 +101,7 @@ class TwitterStreamQuickstartDocSpec extends AkkaSpec {
"mapConcat hashtags" in {
//#hashtags-mapConcat
val hashtags: Source[Hashtag] = tweets.mapConcat(_.hashtags)
val hashtags: Source[Hashtag] = tweets.mapConcat(_.hashtags.toList)
//#hashtags-mapConcat
}
@ -119,7 +123,7 @@ class TwitterStreamQuickstartDocSpec extends AkkaSpec {
val b = Broadcast[Tweet]
tweets ~> b ~> Flow[Tweet].map(_.author) ~> writeAuthors
b ~> Flow[Tweet].mapConcat(_.hashtags) ~> writeHashtags
b ~> Flow[Tweet].mapConcat(_.hashtags.toList) ~> writeHashtags
}
g.run()
//#flow-graph-broadcast
@ -181,13 +185,13 @@ class TwitterStreamQuickstartDocSpec extends AkkaSpec {
val sumSink = Sink.fold[Int, Int](0)(_ + _)
val counterRunnableFlow: RunnableFlow =
tweetsInMinuteFromNow
.filter(_.hashtags contains "#akka")
.filter(_.hashtags contains Akka)
.map(t ⇒ 1)
.to(sumSink)
// materialize the stream once in the morning
val morningMaterialized = counterRunnableFlow.run()
// and once in the evening, reusing the
// and once in the evening, reusing the
val eveningMaterialized = counterRunnableFlow.run()
// the sumSink materialized two different futures