experiments/akkastream/src/main/scala/org/apache/gearpump/akkastream/task/InterleaveTask.scala

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
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 */

package org.apache.gearpump.akkastream.task

import org.apache.gearpump.Message
import org.apache.gearpump.cluster.UserConfig
import org.apache.gearpump.streaming.task.TaskContext

class InterleaveTask(context: TaskContext, userConf : UserConfig)
  extends GraphTask(context, userConf) {

  val sizeOfInputs = sizeOfInPorts
  var index = 0

  // TODO access upstream and pull
  override def onNext(msg : Message) : Unit = {
    output(index, msg)
    index += 1
    if (index == sizeOfInputs) {
      index = 0
    }
  }
}

object InterleaveTask {
  val INPUT_PORTS = "INPUT_PORTS"
  val SEGMENT_SIZE = "SEGMENT_SIZE"
}