| /* |
| * 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 |
| |
| import org.apache.gearpump.streaming.partitioner.PartitionerDescription |
| import org.apache.gearpump.streaming.task.TaskId |
| import org.apache.gearpump.util.Graph |
| |
| /** |
| * DAG is wrapper for [[org.apache.gearpump.util.Graph]] for streaming applications. |
| */ |
| case class DAG(version: Int, processors : Map[ProcessorId, ProcessorDescription], |
| graph : Graph[ProcessorId, PartitionerDescription]) |
| extends Serializable { |
| |
| def isEmpty: Boolean = { |
| processors.isEmpty |
| } |
| |
| def taskCount: Int = { |
| processors.foldLeft(0) { (count, task) => |
| count + task._2.parallelism |
| } |
| } |
| |
| def tasks: List[TaskId] = { |
| processors.flatMap { pair => |
| val (processorId, processor) = pair |
| (0 until processor.parallelism).map(TaskId(processorId, _)) |
| }.toList |
| } |
| } |
| |
| object DAG { |
| def apply(graph: Graph[ProcessorDescription, PartitionerDescription], version: Int = 0): DAG = { |
| val processors = graph.vertices.map { processorDescription => |
| (processorDescription.id, processorDescription) |
| }.toMap |
| val dag = graph.mapVertex { processor => |
| processor.id |
| } |
| new DAG(version, processors, dag) |
| } |
| |
| def empty: DAG = apply(Graph.empty[ProcessorDescription, PartitionerDescription]) |
| } |