| /** |
| * 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.protocol; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.hdfs.protocol.DatanodeInfo; |
| |
| import java.util.List; |
| import java.util.stream.Collectors; |
| |
| /** |
| * Holds the nodes that currently host the block for a block key. |
| */ |
| @InterfaceAudience.Private |
| public final class ScmLocatedBlock { |
| private final String key; |
| private final List<DatanodeInfo> locations; |
| private final DatanodeInfo leader; |
| |
| /** |
| * Creates a ScmLocatedBlock. |
| * |
| * @param key object key |
| * @param locations nodes that currently host the block |
| * @param leader node that currently acts as pipeline leader |
| */ |
| public ScmLocatedBlock(final String key, final List<DatanodeInfo> locations, |
| final DatanodeInfo leader) { |
| this.key = key; |
| this.locations = locations; |
| this.leader = leader; |
| } |
| |
| /** |
| * Returns the object key. |
| * |
| * @return object key |
| */ |
| public String getKey() { |
| return this.key; |
| } |
| |
| /** |
| * Returns the node that currently acts as pipeline leader. |
| * |
| * @return node that currently acts as pipeline leader |
| */ |
| public DatanodeInfo getLeader() { |
| return this.leader; |
| } |
| |
| /** |
| * Returns the nodes that currently host the block. |
| * |
| * @return {@literal List<DatanodeInfo>} nodes that currently host the block |
| */ |
| public List<DatanodeInfo> getLocations() { |
| return this.locations; |
| } |
| |
| @Override |
| public boolean equals(Object otherObj) { |
| if (otherObj == null) { |
| return false; |
| } |
| if (!(otherObj instanceof ScmLocatedBlock)) { |
| return false; |
| } |
| ScmLocatedBlock other = (ScmLocatedBlock)otherObj; |
| return this.key == null ? other.key == null : this.key.equals(other.key); |
| } |
| |
| @Override |
| public int hashCode() { |
| return key.hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return getClass().getSimpleName() + "{key=" + key + "; locations=" |
| + locations.stream().map(loc -> loc.toString()).collect(Collectors |
| .joining(",")) + "; leader=" + leader + "}"; |
| } |
| } |