[GitHub] [james-project] vttranlina commented on a change in pull request #711: JAMES-3539 - WebPushClient

[GitBox <gi...@apache.org>]

vttranlina commented on a change in pull request #711:
URL: https://github.com/apache/james-project/pull/711#discussion_r740851290



##########
File path: server/protocols/jmap-rfc-8621/src/main/scala/org/apache/james/jmap/push_subscription/WebPushClient.scala
##########
@@ -0,0 +1,116 @@
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+ * distributed with this work for additional information        *
+ * regarding copyright ownership.  The ASF licenses this file   *
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+ * under the License.                                           *
+ ****************************************************************/
+
+package org.apache.james.jmap.push_subscription
+
+import io.netty.buffer.Unpooled
+import io.netty.handler.codec.http.HttpResponseStatus
+import org.apache.james.jmap.api.model.PushSubscriptionServerURL
+import org.apache.james.jmap.push_subscription.DefaultWebPushClient.{PUSH_SERVER_ERROR_RESPONSE_MAX_LENGTH, buildHttpClient}
+import org.apache.james.jmap.push_subscription.WebPushClientHeader.{DEFAULT_TIMEOUT, MESSAGE_URGENCY, TIME_TO_LIVE, TOPIC}
+import org.reactivestreams.Publisher
+import reactor.core.publisher.Mono
+import reactor.core.scala.publisher.SMono
+import reactor.netty.ByteBufMono
+import reactor.netty.http.client.{HttpClient, HttpClientResponse}
+import reactor.netty.resources.ConnectionProvider
+
+import java.nio.charset.StandardCharsets
+import java.time.Duration
+import java.time.temporal.ChronoUnit
+
+trait WebPushClient {
+  def push(pushServerUrl: PushSubscriptionServerURL, request: PushRequest): Publisher[Unit]
+}
+
+case class PushClientConfiguration(maxTimeoutSeconds: Option[Int],
+                                   maxConnections: Option[Int],
+                                   maxRetryTimes: Option[Int],
+                                   requestPerSeconds: Option[Int],
+                                   scheduler: reactor.core.scheduler.Scheduler)
+
+object WebPushClientHeader {
+  val TIME_TO_LIVE: String = "TTL"
+  val MESSAGE_URGENCY: String = "Urgency"
+  val TOPIC: String = "Topic"
+  val DEFAULT_TIMEOUT: Duration = Duration.of(30, ChronoUnit.SECONDS)
+}
+
+sealed abstract class WebPushException(message: String) extends RuntimeException(message)
+
+case class WebPushInvalidRequestException(detailError: String) extends WebPushException(s"Bad request when call to Push Server. ${detailError}")
+
+case class WebPushTemporarilyUnavailableException(detailError: String) extends WebPushException(s"Error when call to Push Server. ${detailError}")
+
+object DefaultWebPushClient {
+  val PUSH_SERVER_ERROR_RESPONSE_MAX_LENGTH: Int = 1024
+
+  private def buildHttpClient(configuration: PushClientConfiguration): HttpClient = {
+    val connectionProviderBuilder: ConnectionProvider.Builder = ConnectionProvider.builder(DefaultWebPushClient.getClass.getName)
+    configuration.maxConnections.foreach(configValue => connectionProviderBuilder.maxConnections(configValue))
+    configuration.maxTimeoutSeconds.foreach(configValue => connectionProviderBuilder.pendingAcquireMaxCount(configValue))
+
+    val responseTimeout: Duration = configuration.maxTimeoutSeconds
+      .map(configValue => Duration.of(configValue, ChronoUnit.SECONDS))
+      .getOrElse(DEFAULT_TIMEOUT)
+
+    HttpClient.create(connectionProviderBuilder.build())
+      .responseTimeout(responseTimeout)
+      .headers(builder => {
+        builder.add("Content-Type", "application/json charset=utf-8")

Review comment:
       When the payload has been encrypted, Should we need another Content-Type header?
   




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