| /* |
| * |
| * 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.hbase.replication; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Objects; |
| |
| import org.apache.hadoop.hbase.ServerName; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This class is responsible for the parsing logic for a queue id representing a queue. |
| * It will extract the peerId if it's recovered as well as the dead region servers |
| * that were part of the queue's history. |
| */ |
| @InterfaceAudience.Private |
| public class ReplicationQueueInfo { |
| private static final Logger LOG = LoggerFactory.getLogger(ReplicationQueueInfo.class); |
| |
| private final ServerName owner; |
| private final String peerId; |
| private final String queueId; |
| private boolean queueRecovered; |
| // List of all the dead region servers that had this queue (if recovered) |
| private List<ServerName> deadRegionServers = new ArrayList<>(); |
| |
| /** |
| * The passed queueId will be either the id of the peer or the handling story of that queue |
| * in the form of id-servername-* |
| */ |
| public ReplicationQueueInfo(ServerName owner, String queueId) { |
| this.owner = owner; |
| this.queueId = queueId; |
| String[] parts = queueId.split("-", 2); |
| this.queueRecovered = parts.length != 1; |
| this.peerId = this.queueRecovered ? parts[0] : queueId; |
| if (parts.length >= 2) { |
| // extract dead servers |
| extractDeadServersFromZNodeString(parts[1], this.deadRegionServers); |
| } |
| } |
| |
| /** |
| * A util method to parse the peerId from queueId. |
| */ |
| public static String parsePeerId(String queueId) { |
| String[] parts = queueId.split("-", 2); |
| return parts.length != 1 ? parts[0] : queueId; |
| } |
| |
| /** |
| * A util method to check whether a queue is recovered. |
| */ |
| public static boolean isQueueRecovered(String queueId) { |
| String[] parts = queueId.split("-", 2); |
| return parts.length != 1; |
| } |
| |
| /** |
| * Parse dead server names from queue id. servername can contain "-" such as |
| * "ip-10-46-221-101.ec2.internal", so we need skip some "-" during parsing for the following |
| * cases: 2-ip-10-46-221-101.ec2.internal,52170,1364333181125-<server name>-... |
| */ |
| private static void |
| extractDeadServersFromZNodeString(String deadServerListStr, List<ServerName> result) { |
| if(deadServerListStr == null || result == null || deadServerListStr.isEmpty()) { |
| return; |
| } |
| |
| // valid server name delimiter "-" has to be after "," in a server name |
| int seenCommaCnt = 0; |
| int startIndex = 0; |
| int len = deadServerListStr.length(); |
| |
| for (int i = 0; i < len; i++) { |
| switch (deadServerListStr.charAt(i)) { |
| case ',': |
| seenCommaCnt += 1; |
| break; |
| case '-': |
| if(seenCommaCnt>=2) { |
| if (i > startIndex) { |
| String serverName = deadServerListStr.substring(startIndex, i); |
| if(ServerName.isFullServerName(serverName)){ |
| result.add(ServerName.valueOf(serverName)); |
| } else { |
| LOG.error("Found invalid server name:" + serverName); |
| } |
| startIndex = i + 1; |
| } |
| seenCommaCnt = 0; |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| // add tail |
| if(startIndex < len - 1){ |
| String serverName = deadServerListStr.substring(startIndex, len); |
| if(ServerName.isFullServerName(serverName)){ |
| result.add(ServerName.valueOf(serverName)); |
| } else { |
| LOG.error("Found invalid server name at the end:" + serverName); |
| } |
| } |
| |
| LOG.debug("Found dead servers:" + result); |
| } |
| |
| public List<ServerName> getDeadRegionServers() { |
| return Collections.unmodifiableList(this.deadRegionServers); |
| } |
| |
| public ServerName getOwner() { |
| return this.owner; |
| } |
| |
| public String getPeerId() { |
| return this.peerId; |
| } |
| |
| public String getQueueId() { |
| return this.queueId; |
| } |
| |
| public boolean isQueueRecovered() { |
| return queueRecovered; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o instanceof ReplicationQueueInfo) { |
| ReplicationQueueInfo other = (ReplicationQueueInfo) o; |
| return Objects.equals(this.owner, other.owner) && Objects.equals(this.queueId, other.queueId); |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(this.owner, this.queueId); |
| } |
| } |