| /* |
| * 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 |
| * limitations under the License. |
| */ |
| |
| package org.apache.gearpump.akkastream.task |
| |
| import java.time.Instant |
| |
| import org.apache.gearpump.Message |
| import org.apache.gearpump.cluster.UserConfig |
| import org.apache.gearpump.streaming.task.TaskContext |
| |
| class StatefulMapConcatTask[IN, OUT](context: TaskContext, userConf : UserConfig) |
| extends GraphTask(context, userConf) { |
| |
| val func = userConf.getValue[() => IN => Iterable[OUT]](StatefulMapConcatTask.FUNC).get |
| var f: IN => Iterable[OUT] = _ |
| |
| override def onStart(startTime: Instant) : Unit = { |
| f = func() |
| } |
| |
| override def onNext(msg : Message) : Unit = { |
| val in: IN = msg.msg.asInstanceOf[IN] |
| val out: Iterable[OUT] = f(in) |
| val iterator = out.iterator |
| while(iterator.hasNext) { |
| val nextValue = iterator.next |
| context.output(Message(nextValue, System.currentTimeMillis())) |
| } |
| } |
| } |
| |
| object StatefulMapConcatTask { |
| val FUNC = "FUNC" |
| } |