com.deciphernow.franz.consumers.Flowing.scala Maven / Gradle / Ivy

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/*
 * Copyright 2017 Decipher Technology Studios LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.deciphernow.franz.consumers

import akka.{Done, NotUsed}
import akka.kafka.{ConsumerSettings, Subscription}
import akka.kafka.scaladsl.Consumer
import akka.stream.ActorMaterializer
import akka.stream.scaladsl.{Flow, Sink}
import com.deciphernow.franz.internal.Flows
import org.apache.kafka.clients.consumer.ConsumerRecord

import scala.concurrent.Future

object Flowing {

  def ephemeral[K, V](settings: ConsumerSettings[K, V],
                      subscription: Subscription,
                      flow: Flow[ConsumerRecord[K, V], Done, NotUsed])
                     (implicit materializer: ActorMaterializer): Future[Done] = {
    Consumer.plainSource(settings, subscription)
      .via(flow)
      .runWith(Sink.ignore)
  }

  def persistent[K, V](settings: ConsumerSettings[K, V],
                       subscription: Subscription,
                       flow: Flow[ConsumerRecord[K, V], Done, NotUsed],
                       flowParallelism: Int,
                       commitSize: Int,
                       commitParallelism: Int)
                      (implicit materializer: ActorMaterializer): Future[Done] = {
    Consumer.committableSource(settings, subscription)
      .via(Flows.committable(flow, flowParallelism))
      .via(Flows.committing(commitSize, commitParallelism))
      .runWith(Sink.ignore)
  }


}