|
1 package couchdb.changes |
|
2 |
|
3 import spray.httpx.unmarshalling.{MalformedContent, Unmarshaller, Deserialized} |
|
4 import spray.http._ |
|
5 import spray.json._ |
|
6 import spray.client.pipelining._ |
|
7 import akka.actor.{ActorRef, Actor, ActorLogging} |
|
8 import scala.util.Try |
|
9 import spray.can.Http |
|
10 import akka.io.IO |
|
11 |
|
12 case class ResultRow(seq: Int, id: String, doc: JsObject) |
|
13 |
|
14 trait ChangesMarshaller { |
|
15 |
|
16 implicit object ChangesMarshaller extends Unmarshaller[ResultRow] { |
|
17 import DefaultJsonProtocol._ |
|
18 implicit val changesFormat = jsonFormat3(ResultRow) |
|
19 |
|
20 def apply(entity: HttpEntity): Deserialized[ResultRow] = (Try { |
|
21 Right(JsonParser(entity.asString).asJsObject.convertTo[ResultRow]) |
|
22 }).getOrElse(Left(MalformedContent("bad json"))) |
|
23 |
|
24 } |
|
25 } |
|
26 |
|
27 class ChangesStreamActor(processor: ActorRef) extends Actor with ActorLogging |
|
28 with ChangesMarshaller { |
|
29 |
|
30 val io = IO(Http)(context.system) |
|
31 |
|
32 def receive: Receive = { |
|
33 case uri: Uri => |
|
34 val rq = HttpRequest(HttpMethods.GET, uri = uri) |
|
35 log.debug("Sending request {}", rq) |
|
36 sendTo(io).withResponsesReceivedBy(self)(rq) |
|
37 case x@ChunkedResponseStart(_) => |
|
38 log.debug("Received {}", x) |
|
39 case MessageChunk(data, _) => |
|
40 log.debug("Received data chunk {}", data) |
|
41 if (data.length > 2) // skip heartbeat messages |
|
42 ChangesMarshaller(data).fold( |
|
43 _ => log.warning("Failed to deserialize entity {}", data), |
|
44 processor ! |
|
45 ) |
|
46 case x => |
|
47 log.debug("Received {}", x) |
|
48 } |
|
49 } |
|
50 |
|
51 |
|
52 // vim: set ts=2 sw=2 et: |