/
GrpcSubscriber.scala
82 lines (67 loc) · 2.52 KB
/
GrpcSubscriber.scala
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
/*
* Copyright (C) 2016-2020 Lightbend Inc. <https://www.lightbend.com>
*/
package akka.stream.alpakka.googlecloud.pubsub.grpc.scaladsl
import akka.actor.{
ActorSystem,
ClassicActorSystemProvider,
ExtendedActorSystem,
Extension,
ExtensionId,
ExtensionIdProvider
}
import akka.annotation.ApiMayChange
import akka.stream.alpakka.googlecloud.pubsub.grpc.PubSubSettings
import akka.stream.alpakka.googlecloud.pubsub.grpc.impl.AkkaGrpcSettings
import akka.stream.SystemMaterializer
import com.google.pubsub.v1.pubsub.{SubscriberClient => ScalaSubscriberClient}
/**
* Holds the gRPC scala subscriber client instance.
*/
final class GrpcSubscriber private (settings: PubSubSettings, sys: ActorSystem) {
@ApiMayChange
final val client =
ScalaSubscriberClient(AkkaGrpcSettings.fromPubSubSettings(settings)(sys))(SystemMaterializer(sys).materializer,
sys.dispatcher)
sys.registerOnTermination(client.close())
}
object GrpcSubscriber {
def apply(settings: PubSubSettings)(implicit sys: ClassicActorSystemProvider): GrpcSubscriber =
new GrpcSubscriber(settings, sys.classicSystem)
def apply(settings: PubSubSettings, sys: ActorSystem): GrpcSubscriber =
new GrpcSubscriber(settings, sys)
def apply()(implicit sys: ClassicActorSystemProvider): GrpcSubscriber =
apply(PubSubSettings(sys))
def apply(sys: ActorSystem): GrpcSubscriber =
apply(PubSubSettings(sys), sys)
}
/**
* An extension that manages a single gRPC scala subscriber client per actor system.
*/
final class GrpcSubscriberExt private (sys: ExtendedActorSystem) extends Extension {
implicit val subscriber = GrpcSubscriber(sys: ActorSystem)
}
object GrpcSubscriberExt extends ExtensionId[GrpcSubscriberExt] with ExtensionIdProvider {
override def lookup = GrpcSubscriberExt
override def createExtension(system: ExtendedActorSystem) = new GrpcSubscriberExt(system)
/**
* Access to extension from the new and classic actors API.
*/
def apply()(implicit system: ClassicActorSystemProvider): GrpcSubscriberExt = super.apply(system)
/**
* Access to the extension from the classic actors API.
*/
override def apply(system: ActorSystem): GrpcSubscriberExt = super.apply(system)
/**
* Java API
*
* Access to extension.
*/
override def get(system: ActorSystem): GrpcSubscriberExt = super.get(system)
/**
* Java API
*
* Access to extension.
*/
override def get(system: ClassicActorSystemProvider): GrpcSubscriberExt = super.get(system)
}