Huawei Push Kit

The Alpakka Huawei Push Kit connector provides a way to send notifications with Huawei Push Kit.

Artifacts

sbt

val AkkaVersion = "2.6.14"
val AkkaHttpVersion = "10.1.11"
libraryDependencies ++= Seq(
  "com.lightbend.akka" %% "akka-stream-alpakka-huawei-push-kit" % "3.0.4",
  "com.typesafe.akka" %% "akka-stream" % AkkaVersion,
  "com.typesafe.akka" %% "akka-http" % AkkaHttpVersion,
  "com.typesafe.akka" %% "akka-http-spray-json" % AkkaHttpVersion
)

Maven

<properties>
  <akka.version>2.6.14</akka.version>
  <akka.http.version>10.1.11</akka.http.version>
  <scala.binary.version>2.12</scala.binary.version>
</properties>
<dependencies>
  <dependency>
    <groupId>com.lightbend.akka</groupId>
    <artifactId>akka-stream-alpakka-huawei-push-kit_${scala.binary.version}</artifactId>
    <version>3.0.4</version>
  </dependency>
  <dependency>
    <groupId>com.typesafe.akka</groupId>
    <artifactId>akka-stream_${scala.binary.version}</artifactId>
    <version>${akka.version}</version>
  </dependency>
  <dependency>
    <groupId>com.typesafe.akka</groupId>
    <artifactId>akka-http_${scala.binary.version}</artifactId>
    <version>${akka.http.version}</version>
  </dependency>
  <dependency>
    <groupId>com.typesafe.akka</groupId>
    <artifactId>akka-http-spray-json_${scala.binary.version}</artifactId>
    <version>${akka.http.version}</version>
  </dependency>
</dependencies>

Gradle

def versions = [
  AkkaVersion: "2.6.14",
  AkkaHttpVersion: "10.1.11",
  ScalaBinary: "2.12"
]
dependencies {
  implementation "com.lightbend.akka:akka-stream-alpakka-huawei-push-kit_${versions.ScalaBinary}:3.0.4"
  implementation "com.typesafe.akka:akka-stream_${versions.ScalaBinary}:${versions.AkkaVersion}"
  implementation "com.typesafe.akka:akka-http_${versions.ScalaBinary}:${versions.AkkaHttpVersion}"
  implementation "com.typesafe.akka:akka-http-spray-json_${versions.ScalaBinary}:${versions.AkkaHttpVersion}"
}

The table below shows direct dependencies of this module and the second tab shows all libraries it depends on transitively.

Direct dependencies

Organization	Artifact	Version
com.github.jwt-scala	jwt-spray-json_2.12	7.1.0
com.typesafe.akka	akka-http-spray-json_2.12	10.1.11
com.typesafe.akka	akka-http_2.12	10.1.11
com.typesafe.akka	akka-stream_2.12	2.6.14
org.scala-lang	scala-library	2.12.11

Dependency tree

com.github.jwt-scala    jwt-spray-json_2.12    7.1.0    Apache-2.0
    com.github.jwt-scala    jwt-json-common_2.12    7.1.0    Apache-2.0
        com.github.jwt-scala    jwt-core_2.12    7.1.0    Apache-2.0
            org.scala-lang    scala-library    2.12.11    Apache-2.0
        org.scala-lang    scala-library    2.12.11    Apache-2.0
    io.spray    spray-json_2.12    1.3.6    Apache 2
        org.scala-lang    scala-library    2.12.11    Apache-2.0
    org.scala-lang    scala-library    2.12.11    Apache-2.0
com.typesafe.akka    akka-http-spray-json_2.12    10.1.11    Apache-2.0
    com.typesafe.akka    akka-http_2.12    10.1.11    Apache-2.0
        com.typesafe.akka    akka-http-core_2.12    10.1.11    Apache-2.0
            com.typesafe.akka    akka-parsing_2.12    10.1.11    Apache-2.0
                org.scala-lang    scala-library    2.12.11    Apache-2.0
            org.scala-lang    scala-library    2.12.11    Apache-2.0
        org.scala-lang    scala-library    2.12.11    Apache-2.0
    io.spray    spray-json_2.12    1.3.6    Apache 2
        org.scala-lang    scala-library    2.12.11    Apache-2.0
    org.scala-lang    scala-library    2.12.11    Apache-2.0
com.typesafe.akka    akka-http_2.12    10.1.11    Apache-2.0
    com.typesafe.akka    akka-http-core_2.12    10.1.11    Apache-2.0
        com.typesafe.akka    akka-parsing_2.12    10.1.11    Apache-2.0
            org.scala-lang    scala-library    2.12.11    Apache-2.0
        org.scala-lang    scala-library    2.12.11    Apache-2.0
    org.scala-lang    scala-library    2.12.11    Apache-2.0
com.typesafe.akka    akka-stream_2.12    2.6.14    Apache-2.0
    com.typesafe.akka    akka-actor_2.12    2.6.14    Apache-2.0
        com.typesafe    config    1.4.0    Apache-2.0
        org.scala-lang.modules    scala-java8-compat_2.12    0.8.0    BSD 3-clause
            org.scala-lang    scala-library    2.12.11    Apache-2.0
        org.scala-lang    scala-library    2.12.11    Apache-2.0
    com.typesafe.akka    akka-protobuf-v3_2.12    2.6.14    Apache-2.0
    com.typesafe    ssl-config-core_2.12    0.4.2    Apache-2.0
        com.typesafe    config    1.4.0    Apache-2.0
        org.scala-lang.modules    scala-parser-combinators_2.12    1.1.2    Apache-2.0
            org.scala-lang    scala-library    2.12.11    Apache-2.0
        org.scala-lang    scala-library    2.12.11    Apache-2.0
    org.reactivestreams    reactive-streams    1.0.3    CC0
    org.scala-lang    scala-library    2.12.11    Apache-2.0
org.scala-lang    scala-library    2.12.11    Apache-2.0

Settings

All of the configuration settings for Huawei Push Kit can be found in the reference.conf.

copysourcealpakka.huawei.pushkit {
  app-id: "105260069"
  app-secret: "a192c0f08d03216b0f03b946918d5c725bbf54264a434227928c612012eefd24"
}

The test and maxConcurrentConnections parameters in HmsSettings are the predefined values. You can send test notifications (so called validate only). And you can set the number of maximum concurrent connections.

Sending notifications

To send a notification message create your notification object, and send it!

Scala

copysourceimport akka.stream.alpakka.huawei.pushkit._
import akka.stream.alpakka.huawei.pushkit.scaladsl.HmsPushKit
import akka.stream.alpakka.huawei.pushkit.models.AndroidConfig
import akka.stream.alpakka.huawei.pushkit.models.AndroidNotification
import akka.stream.alpakka.huawei.pushkit.models.BasicNotification
import akka.stream.alpakka.huawei.pushkit.models.ClickAction
import akka.stream.alpakka.huawei.pushkit.models.Condition
import akka.stream.alpakka.huawei.pushkit.models.ErrorResponse
import akka.stream.alpakka.huawei.pushkit.models.PushKitNotification
import akka.stream.alpakka.huawei.pushkit.models.PushKitResponse
import akka.stream.alpakka.huawei.pushkit.models.Response
import akka.stream.alpakka.huawei.pushkit.models.Tokens

val result1: Future[immutable.Seq[Response]] =
  Source
    .single(notification)
    .via(HmsPushKit.send(config))
    .map {
      case res @ PushKitResponse(code, msg, requestId) =>
        println(s"Response $res")
        res
      case res @ ErrorResponse(errorMessage) =>
        println(s"Send error $res")
        res
    }
    .runWith(Sink.seq)

Java

copysourceimport akka.stream.alpakka.huawei.pushkit.*;
import akka.stream.alpakka.huawei.pushkit.javadsl.HmsPushKit;
import akka.stream.alpakka.huawei.pushkit.models.AndroidConfig;
import akka.stream.alpakka.huawei.pushkit.models.AndroidNotification;
import akka.stream.alpakka.huawei.pushkit.models.BasicNotification;
import akka.stream.alpakka.huawei.pushkit.models.ClickAction;
import akka.stream.alpakka.huawei.pushkit.models.ErrorResponse;
import akka.stream.alpakka.huawei.pushkit.models.PushKitNotification;
import akka.stream.alpakka.huawei.pushkit.models.PushKitResponse;
import akka.stream.alpakka.huawei.pushkit.models.Response;
import akka.stream.alpakka.huawei.pushkit.models.Tokens;

CompletionStage<List<Response>> result =
    Source.single(notification)
        .via(HmsPushKit.send(config))
        .map(
            res -> {
              if (!res.isFailure()) {
                PushKitResponse response = (PushKitResponse) res;
                System.out.println("Response " + response);
              } else {
                ErrorResponse response = (ErrorResponse) res;
                System.out.println("Send error " + response);
              }
              return res;
            })
        .runWith(Sink.seq(), system);

With this type of send you can get responses from the server. These responses can be PushKitResponse or ErrorResponse. You can choose what you want to do with this information, but keep in mind if you try to resend the failed messages you will need to use exponential backoff! (see @extref[Akka docs RestartFlow.onFailuresWithBackoff)

If you don’t care if the notification was sent successfully, you may use fireAndForget.

Scala

copysourceimport akka.stream.alpakka.huawei.pushkit._
import akka.stream.alpakka.huawei.pushkit.scaladsl.HmsPushKit
import akka.stream.alpakka.huawei.pushkit.models.AndroidConfig
import akka.stream.alpakka.huawei.pushkit.models.AndroidNotification
import akka.stream.alpakka.huawei.pushkit.models.BasicNotification
import akka.stream.alpakka.huawei.pushkit.models.ClickAction
import akka.stream.alpakka.huawei.pushkit.models.Condition
import akka.stream.alpakka.huawei.pushkit.models.ErrorResponse
import akka.stream.alpakka.huawei.pushkit.models.PushKitNotification
import akka.stream.alpakka.huawei.pushkit.models.PushKitResponse
import akka.stream.alpakka.huawei.pushkit.models.Response
import akka.stream.alpakka.huawei.pushkit.models.Tokens

val config = HmsSettings()
val notification: PushKitNotification =
  PushKitNotification.empty
    .withNotification(
      BasicNotification.empty
        .withTitle("title")
        .withBody("body")
    )
    .withAndroidConfig(
      AndroidConfig.empty
        .withNotification(
          AndroidNotification.empty
            .withClickAction(
              ClickAction.empty
                .withType(3)
            )
        )
    )
    .withTarget(Tokens(Set[String]("token").toSeq))

Source
  .single(notification)
  .runWith(HmsPushKit.fireAndForget(config))

Java

copysourceimport akka.stream.alpakka.huawei.pushkit.*;
import akka.stream.alpakka.huawei.pushkit.javadsl.HmsPushKit;
import akka.stream.alpakka.huawei.pushkit.models.AndroidConfig;
import akka.stream.alpakka.huawei.pushkit.models.AndroidNotification;
import akka.stream.alpakka.huawei.pushkit.models.BasicNotification;
import akka.stream.alpakka.huawei.pushkit.models.ClickAction;
import akka.stream.alpakka.huawei.pushkit.models.ErrorResponse;
import akka.stream.alpakka.huawei.pushkit.models.PushKitNotification;
import akka.stream.alpakka.huawei.pushkit.models.PushKitResponse;
import akka.stream.alpakka.huawei.pushkit.models.Response;
import akka.stream.alpakka.huawei.pushkit.models.Tokens;

HmsSettings config = HmsSettings.create(system);
PushKitNotification notification =
    PushKitNotification.fromJava()
        .withNotification(BasicNotification.fromJava().withTitle("title").withBody("body"))
        .withAndroidConfig(
            AndroidConfig.fromJava()
                .withNotification(
                    AndroidNotification.fromJava()
                        .withClickAction(ClickAction.fromJava().withType(3))))
        .withTarget(new Tokens(new Set.Set1<>("token").toSeq()));

Source.single(notification).runWith(HmsPushKit.fireAndForget(config), system);

With fire and forget you will just send messages and ignore all the errors.

To help the integration and error handling or logging, there is a variation of the flow where you can send data beside your notification.

Scala only

You can build notification described in the original documentation. It can be done by hand, or using some builder method. See an example of the condition builder below.

Scala

copysourceimport akka.stream.alpakka.huawei.pushkit.models.Condition.{Topic => CTopic}
val condition = Condition(CTopic("TopicA") && (CTopic("TopicB") || (CTopic("TopicC") && !CTopic("TopicD"))))