| /* |
| * 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.streaming.dsl.task |
| |
| import java.time.Instant |
| |
| import org.apache.gearpump.Message |
| import org.apache.gearpump.cluster.UserConfig |
| import org.apache.gearpump.streaming.Constants._ |
| import org.apache.gearpump.streaming.dsl.plan.functions.FunctionRunner |
| import org.apache.gearpump.streaming.task.{Task, TaskContext} |
| |
| class TransformTask[IN, OUT](operator: Option[FunctionRunner[IN, OUT]], |
| taskContext: TaskContext, userConf: UserConfig) extends Task(taskContext, userConf) { |
| |
| def this(taskContext: TaskContext, userConf: UserConfig) = { |
| this(userConf.getValue[FunctionRunner[IN, OUT]]( |
| GEARPUMP_STREAMING_OPERATOR)(taskContext.system), taskContext, userConf) |
| } |
| |
| override def onStart(startTime: Instant): Unit = { |
| operator.foreach(_.setup()) |
| } |
| |
| override def onNext(msg: Message): Unit = { |
| val time = msg.timestamp |
| |
| operator match { |
| case Some(op) => |
| op.process(msg.msg.asInstanceOf[IN]).foreach { msg => |
| taskContext.output(new Message(msg, time)) |
| } |
| case None => |
| taskContext.output(new Message(msg.msg, time)) |
| } |
| } |
| |
| override def onStop(): Unit = { |
| operator.foreach(_.teardown()) |
| } |
| } |