blob: 72e61212fbd3819f96cea8bd44748c3b7b7a7905 [file] [log] [blame]
/*
* 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.bookkeeper.util;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.apache.bookkeeper.client.ITopologyAwareEnsemblePlacementPolicy;
import org.apache.bookkeeper.client.RackChangeNotifier;
import org.apache.bookkeeper.net.AbstractDNSToSwitchMapping;
import org.apache.bookkeeper.net.BookieId;
import org.apache.bookkeeper.net.BookieNode;
import org.apache.bookkeeper.net.BookieSocketAddress;
import org.apache.bookkeeper.net.DNSToSwitchMapping;
import org.apache.bookkeeper.net.NetworkTopology;
import org.apache.bookkeeper.net.NodeBase;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Implements {@link DNSToSwitchMapping} via static mappings. Used in test cases to simulate racks.
*/
public class StaticDNSResolver extends AbstractDNSToSwitchMapping implements RackChangeNotifier {
static final Logger LOG = LoggerFactory.getLogger(StaticDNSResolver.class);
private static final ConcurrentMap<String, String> name2Racks = new ConcurrentHashMap<String, String>();
public static void addNodeToRack(String name, String rack) {
name2Racks.put(name, rack);
if (LOG.isDebugEnabled()) {
LOG.debug("Add node {} to rack {}.", name, rack);
}
}
public static String getRack(String name) {
String rack = name2Racks.get(name);
if (null == rack) {
rack = NetworkTopology.DEFAULT_REGION_AND_RACK;
}
return rack;
}
public static String getRegion(String name) {
String[] parts = getRack(name).split(NodeBase.PATH_SEPARATOR_STR);
if (parts.length <= 1) {
return NetworkTopology.DEFAULT_REGION;
} else {
return parts[1];
}
}
public static void reset() {
name2Racks.clear();
}
@Override
public List<String> resolve(List<String> names) {
if (getBookieAddressResolver() == null) {
// test that this istance has been properly initialized
throw new IllegalStateException("bookieAddressResolver was not set");
}
List<String> racks = new ArrayList<String>();
for (String n : names) {
String rack = name2Racks.get(n);
if (LOG.isDebugEnabled()) {
LOG.debug("Resolve name {} to rack {}.", n, rack);
}
racks.add(rack);
}
return racks;
}
@Override
public void reloadCachedMappings() {
// nop
}
private static ITopologyAwareEnsemblePlacementPolicy<BookieNode> rackawarePolicy = null;
@Override
public void registerRackChangeListener(ITopologyAwareEnsemblePlacementPolicy<BookieNode> rackawareEnsemblePolicy) {
rackawarePolicy = rackawareEnsemblePolicy;
}
public static void changeRack(List<BookieSocketAddress> bookieAddressList, List<String> rack) {
List<BookieId> bookieIds = new ArrayList<>();
for (int i = 0; i < bookieAddressList.size(); i++) {
BookieSocketAddress bkAddress = bookieAddressList.get(i);
name2Racks.put(bkAddress.getHostName(), rack.get(i));
bookieIds.add(bkAddress.toBookieId());
}
rackawarePolicy.onBookieRackChange(bookieIds);
}
}