| /* |
| * 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.hadoop.hdds.scm.node.states; |
| |
| import org.apache.hadoop.hdds.protocol.DatanodeDetails; |
| import org.apache.hadoop.hdds.scm.container.common.helpers.Pipeline; |
| import org.apache.hadoop.hdds.scm.container.common.helpers.PipelineID; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.UUID; |
| |
| /** |
| * This data structure maintains the list of pipelines which the given datanode is a part of. This |
| * information will be added whenever a new pipeline allocation happens. |
| * |
| * <p>TODO: this information needs to be regenerated from pipeline reports on SCM restart |
| */ |
| public class Node2PipelineMap extends Node2ObjectsMap<PipelineID> { |
| |
| /** Constructs a Node2PipelineMap Object. */ |
| public Node2PipelineMap() { |
| super(); |
| } |
| |
| /** |
| * Returns null if there no pipelines associated with this datanode ID. |
| * |
| * @param datanode - UUID |
| * @return Set of pipelines or Null. |
| */ |
| public Set<PipelineID> getPipelines(UUID datanode) { |
| return getObjects(datanode); |
| } |
| |
| /** |
| * Adds a pipeline entry to a given dataNode in the map. |
| * |
| * @param pipeline Pipeline to be added |
| */ |
| public synchronized void addPipeline(Pipeline pipeline) { |
| for (DatanodeDetails details : pipeline.getDatanodes().values()) { |
| UUID dnId = details.getUuid(); |
| dn2ObjectMap.computeIfAbsent(dnId, k -> new HashSet<>()) |
| .add(pipeline.getId()); |
| } |
| } |
| |
| public synchronized void removePipeline(Pipeline pipeline) { |
| for (DatanodeDetails details : pipeline.getDatanodes().values()) { |
| UUID dnId = details.getUuid(); |
| dn2ObjectMap.computeIfPresent(dnId, |
| (k, v) -> { |
| v.remove(pipeline.getId()); |
| return v; |
| }); |
| } |
| } |
| } |