org.apache.hadoop.hbase.replication.ReplicationQueueInfo Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
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* 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,
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* See the License for the specific language governing permissions and
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package org.apache.hadoop.hbase.replication;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
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 String peerId;
private final String queueId;
private boolean queueRecovered;
// List of all the dead region servers that had this queue (if recovered)
private List 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(String queueId) {
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);
}
}
/**
* 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 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 getDeadRegionServers() {
return Collections.unmodifiableList(this.deadRegionServers);
}
public String getPeerId() {
return this.peerId;
}
public String getQueueId() {
return this.queueId;
}
public boolean isQueueRecovered() {
return queueRecovered;
}
}
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