| /** |
| * 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.pipeline; |
| |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| import org.apache.hadoop.hdds.protocol.DatanodeDetails; |
| import org.apache.hadoop.hdds.protocol.proto.HddsProtos.ReplicationFactor; |
| import org.apache.hadoop.hdds.protocol.proto.HddsProtos.ReplicationType; |
| import org.apache.hadoop.hdds.scm.exceptions.SCMException; |
| import org.apache.hadoop.hdds.scm.node.NodeManager; |
| import org.apache.hadoop.hdds.scm.node.NodeStatus; |
| |
| /** |
| * Interface for creating pipelines. |
| */ |
| public abstract class PipelineProvider { |
| |
| private final NodeManager nodeManager; |
| private final PipelineStateManager stateManager; |
| |
| public PipelineProvider(NodeManager nodeManager, |
| PipelineStateManager stateManager) { |
| this.nodeManager = nodeManager; |
| this.stateManager = stateManager; |
| } |
| |
| public PipelineProvider() { |
| this.nodeManager = null; |
| this.stateManager = null; |
| } |
| |
| public NodeManager getNodeManager() { |
| return nodeManager; |
| } |
| |
| public PipelineStateManager getPipelineStateManager() { |
| return stateManager; |
| } |
| |
| protected abstract Pipeline create(ReplicationFactor factor) |
| throws IOException; |
| |
| protected abstract Pipeline create(ReplicationFactor factor, |
| List<DatanodeDetails> nodes); |
| |
| protected abstract void close(Pipeline pipeline) throws IOException; |
| |
| protected abstract void shutdown(); |
| |
| List<DatanodeDetails> pickNodesNeverUsed(ReplicationType type, |
| ReplicationFactor factor) throws SCMException { |
| Set<DatanodeDetails> dnsUsed = new HashSet<>(); |
| stateManager.getPipelines(type, factor).stream().filter( |
| p -> p.getPipelineState().equals(Pipeline.PipelineState.OPEN) || |
| p.getPipelineState().equals(Pipeline.PipelineState.DORMANT) || |
| p.getPipelineState().equals(Pipeline.PipelineState.ALLOCATED)) |
| .forEach(p -> dnsUsed.addAll(p.getNodes())); |
| |
| // Get list of healthy nodes |
| List<DatanodeDetails> dns = nodeManager |
| .getNodes(NodeStatus.inServiceHealthy()) |
| .parallelStream() |
| .filter(dn -> !dnsUsed.contains(dn)) |
| .limit(factor.getNumber()) |
| .collect(Collectors.toList()); |
| if (dns.size() < factor.getNumber()) { |
| String e = String |
| .format("Cannot create pipeline of factor %d using %d nodes." + |
| " Used %d nodes. Healthy nodes %d", factor.getNumber(), |
| dns.size(), dnsUsed.size(), |
| nodeManager.getNodes(NodeStatus.inServiceHealthy()).size()); |
| throw new SCMException(e, |
| SCMException.ResultCodes.FAILED_TO_FIND_SUITABLE_NODE); |
| } |
| return dns; |
| } |
| } |