| /** |
| * 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; |
| |
| import org.apache.hadoop.hdds.protocol.DatanodeDetails; |
| import org.apache.hadoop.hdds.protocol.proto.HddsProtos; |
| import org.apache.hadoop.hdds.scm.container.placement.metrics.SCMNodeStat; |
| |
| import java.util.Comparator; |
| |
| public class DatanodeUsageInfo { |
| |
| private DatanodeDetails datanodeDetails; |
| private SCMNodeStat scmNodeStat; |
| |
| /** |
| * Constructs a DatanodeUsageInfo with DatanodeDetails and SCMNodeStat. |
| * |
| * @param datanodeDetails DatanodeDetails |
| * @param scmNodeStat SCMNodeStat |
| */ |
| public DatanodeUsageInfo( |
| DatanodeDetails datanodeDetails, |
| SCMNodeStat scmNodeStat) { |
| this.datanodeDetails = datanodeDetails; |
| this.scmNodeStat = scmNodeStat; |
| } |
| |
| /** |
| * Compares two DatanodeUsageInfo on the basis of remaining space to capacity |
| * ratio. |
| * |
| * @param first DatanodeUsageInfo |
| * @param second DatanodeUsageInfo |
| * @return a value greater than 0 if second has higher remaining to |
| * capacity ratio, a value lesser than 0 if first has higher remaining to |
| * capacity ratio, and 0 if both have equal ratios or first.equals(second) |
| * is true |
| */ |
| private static int compareByRemainingRatio(DatanodeUsageInfo first, |
| DatanodeUsageInfo second) { |
| if (first.equals(second)) { |
| return 0; |
| } |
| return first.getScmNodeStat() |
| .compareByRemainingRatio(second.getScmNodeStat()); |
| } |
| |
| /** |
| * Sets DatanodeDetails of this DatanodeUsageInfo. |
| * |
| * @param datanodeDetails the DatanodeDetails to use |
| */ |
| public void setDatanodeDetails( |
| DatanodeDetails datanodeDetails) { |
| this.datanodeDetails = datanodeDetails; |
| } |
| |
| /** |
| * Sets SCMNodeStat of this DatanodeUsageInfo. |
| * |
| * @param scmNodeStat the SCMNodeStat to use. |
| */ |
| public void setScmNodeStat( |
| SCMNodeStat scmNodeStat) { |
| this.scmNodeStat = scmNodeStat; |
| } |
| |
| /** |
| * Gets DatanodeDetails of this DatanodeUsageInfo. |
| * |
| * @return DatanodeDetails |
| */ |
| public DatanodeDetails getDatanodeDetails() { |
| return datanodeDetails; |
| } |
| |
| /** |
| * Gets SCMNodeStat of this DatanodeUsageInfo. |
| * |
| * @return SCMNodeStat |
| */ |
| public SCMNodeStat getScmNodeStat() { |
| return scmNodeStat; |
| } |
| |
| /** |
| * Gets Comparator that compares two DatanodeUsageInfo on the basis of |
| * remaining space to capacity ratio. |
| * |
| * @return Comparator to compare two DatanodeUsageInfo. The comparison |
| * function returns a value greater than 0 if second DatanodeUsageInfo has |
| * greater remaining space to capacity ratio, a value lesser than 0 if |
| * first DatanodeUsageInfo has greater remaining space to capacity ratio, |
| * and 0 if both have equal ratios or first.equals(second) is true |
| */ |
| public static Comparator<DatanodeUsageInfo> getMostUsedByRemainingRatio() { |
| return DatanodeUsageInfo::compareByRemainingRatio; |
| } |
| |
| /** |
| * Checks if the specified Object o is equal to this DatanodeUsageInfo. |
| * |
| * @param o Object to check |
| * @return true if both refer to the same object or if both have the same |
| * DatanodeDetails, false otherwise |
| */ |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| DatanodeUsageInfo that = (DatanodeUsageInfo) o; |
| return datanodeDetails.equals(that.datanodeDetails); |
| } |
| |
| @Override |
| public int hashCode() { |
| return datanodeDetails.hashCode(); |
| } |
| |
| /** |
| * Converts an object of type DatanodeUsageInfo to Protobuf type |
| * HddsProtos.DatanodeUsageInfoProto. |
| * |
| * @return Protobuf HddsProtos.DatanodeUsageInfo |
| */ |
| public HddsProtos.DatanodeUsageInfoProto toProto() { |
| return toProtoBuilder().build(); |
| } |
| |
| private HddsProtos.DatanodeUsageInfoProto.Builder toProtoBuilder() { |
| HddsProtos.DatanodeUsageInfoProto.Builder builder = |
| HddsProtos.DatanodeUsageInfoProto.newBuilder(); |
| |
| if (datanodeDetails != null) { |
| builder.setNode( |
| datanodeDetails.toProto(datanodeDetails.getCurrentVersion())); |
| } |
| if (scmNodeStat != null) { |
| builder.setCapacity(scmNodeStat.getCapacity().get()); |
| builder.setUsed(scmNodeStat.getScmUsed().get()); |
| builder.setRemaining(scmNodeStat.getRemaining().get()); |
| } |
| return builder; |
| } |
| } |