| /** |
| * 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.hdfs.server.namenode.ha; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.net.URL; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import com.google.common.base.Objects; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.DFSUtil; |
| import org.apache.hadoop.hdfs.HAUtil; |
| import org.apache.hadoop.hdfs.server.namenode.NameNode; |
| |
| import com.google.common.base.Preconditions; |
| |
| /** |
| * Information about a single remote NameNode |
| */ |
| public class RemoteNameNodeInfo { |
| |
| public static List<RemoteNameNodeInfo> getRemoteNameNodes(Configuration conf) throws IOException { |
| String nsId = DFSUtil.getNamenodeNameServiceId(conf); |
| return getRemoteNameNodes(conf, nsId); |
| } |
| |
| public static List<RemoteNameNodeInfo> getRemoteNameNodes(Configuration conf, String nsId) |
| throws IOException { |
| // there is only a single NN configured (and no federation) so we don't have any more NNs |
| if (nsId == null) { |
| return Collections.emptyList(); |
| } |
| List<Configuration> otherNodes = HAUtil.getConfForOtherNodes(conf); |
| List<RemoteNameNodeInfo> nns = new ArrayList<RemoteNameNodeInfo>(); |
| |
| for (Configuration otherNode : otherNodes) { |
| String otherNNId = HAUtil.getNameNodeId(otherNode, nsId); |
| // don't do any validation here as in some cases, it can be overwritten later |
| InetSocketAddress otherIpcAddr = NameNode.getServiceAddress(otherNode, true); |
| |
| |
| final String scheme = DFSUtil.getHttpClientScheme(conf); |
| URL otherHttpAddr = DFSUtil.getInfoServerWithDefaultHost(otherIpcAddr.getHostName(), |
| otherNode, scheme).toURL(); |
| |
| nns.add(new RemoteNameNodeInfo(otherNode, otherNNId, otherIpcAddr, otherHttpAddr)); |
| } |
| return nns; |
| } |
| |
| private final Configuration conf; |
| private final String nnId; |
| private InetSocketAddress ipcAddress; |
| private final URL httpAddress; |
| |
| private RemoteNameNodeInfo(Configuration conf, String nnId, InetSocketAddress ipcAddress, |
| URL httpAddress) { |
| this.conf = conf; |
| this.nnId = nnId; |
| this.ipcAddress = ipcAddress; |
| this.httpAddress = httpAddress; |
| } |
| |
| public InetSocketAddress getIpcAddress() { |
| return this.ipcAddress; |
| } |
| |
| public String getNameNodeID() { |
| return this.nnId; |
| } |
| |
| public URL getHttpAddress() { |
| return this.httpAddress; |
| } |
| |
| public Configuration getConfiguration() { |
| return this.conf; |
| } |
| |
| public void setIpcAddress(InetSocketAddress ipc) { |
| this.ipcAddress = ipc; |
| } |
| |
| @Override |
| public String toString() { |
| return "RemoteNameNodeInfo [nnId=" + nnId + ", ipcAddress=" + ipcAddress |
| + ", httpAddress=" + httpAddress + "]"; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| |
| RemoteNameNodeInfo that = (RemoteNameNodeInfo) o; |
| |
| if (!nnId.equals(that.nnId)) return false; |
| if (!ipcAddress.equals(that.ipcAddress)) return false; |
| // convert to the standard strings since URL.equals does address resolution, which is a |
| // blocking call and a a FindBugs issue. |
| String httpString = httpAddress.toString(); |
| String thatHttpString = that.httpAddress.toString(); |
| return httpString.equals(thatHttpString); |
| |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = nnId.hashCode(); |
| result = 31 * result + ipcAddress.hashCode(); |
| // toString rather than hashCode b/c Url.hashCode is a blocking call. |
| result = 31 * result + httpAddress.toString().hashCode(); |
| return result; |
| } |
| } |