| /* |
| * 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.cassandra.distributed.shared; |
| |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.UnknownHostException; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.function.IntFunction; |
| import java.util.stream.Collectors; |
| import java.util.stream.IntStream; |
| |
| public class NetworkTopology |
| { |
| private final Map<InetSocketAddress, DcAndRack> map; |
| |
| public static class DcAndRack |
| { |
| public final String dc; |
| public final String rack; |
| |
| private DcAndRack(String dc, String rack) |
| { |
| this.dc = dc; |
| this.rack = rack; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "DcAndRack{" + |
| "dc='" + dc + '\'' + |
| ", rack='" + rack + '\'' + |
| '}'; |
| } |
| |
| @Override |
| public boolean equals(Object o) |
| { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| DcAndRack dcAndRack = (DcAndRack) o; |
| return Objects.equals(dc, dcAndRack.dc) && |
| Objects.equals(rack, dcAndRack.rack); |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return Objects.hash(dc, rack); |
| } |
| } |
| |
| public static DcAndRack dcAndRack(String dc, String rack) |
| { |
| return new DcAndRack(dc, rack); |
| } |
| |
| public static InetSocketAddress addressAndPort(InetAddress address, int port) |
| { |
| return new InetSocketAddress(address, port); |
| } |
| |
| public static InetSocketAddress addressAndPort(String address, int port) |
| { |
| try |
| { |
| return new InetSocketAddress(InetAddress.getByName(address), port); |
| } |
| catch (UnknownHostException e) |
| { |
| throw new IllegalArgumentException("Unknown address '" + address + '\''); |
| } |
| } |
| |
| private NetworkTopology() |
| { |
| map = new HashMap<>(); |
| } |
| |
| @SuppressWarnings("WeakerAccess") |
| public NetworkTopology(NetworkTopology networkTopology) |
| { |
| map = new HashMap<>(networkTopology.map); |
| } |
| |
| public static NetworkTopology build(String ipPrefix, int broadcastPort, Map<Integer, DcAndRack> nodeIdTopology) |
| { |
| final NetworkTopology topology = new NetworkTopology(); |
| |
| for (int nodeId = 1; nodeId <= nodeIdTopology.size(); nodeId++) |
| { |
| String broadcastAddress = ipPrefix + nodeId; |
| |
| DcAndRack dcAndRack = nodeIdTopology.get(nodeId); |
| if (dcAndRack == null) |
| throw new IllegalStateException("nodeId " + nodeId + "not found in instanceMap"); |
| |
| topology.put(addressAndPort(broadcastAddress, broadcastPort), dcAndRack); |
| } |
| return topology; |
| } |
| |
| public DcAndRack put(InetSocketAddress addressAndPort, DcAndRack value) |
| { |
| return map.put(addressAndPort, value); |
| } |
| |
| public String localRack(InetSocketAddress key) |
| { |
| DcAndRack p = map.get(key); |
| if (p == null) |
| return null; |
| return p.rack; |
| } |
| |
| public String localDC(InetSocketAddress key) |
| { |
| DcAndRack p = map.get(key); |
| if (p == null) |
| return null; |
| return p.dc; |
| } |
| |
| public boolean contains(InetSocketAddress key) |
| { |
| return map.containsKey(key); |
| } |
| |
| public String toString() |
| { |
| return "NetworkTopology{" + map + '}'; |
| } |
| |
| |
| public static Map<Integer, NetworkTopology.DcAndRack> singleDcNetworkTopology(int nodeCount, |
| String dc, |
| String rack) |
| { |
| return networkTopology(nodeCount, (nodeid) -> NetworkTopology.dcAndRack(dc, rack)); |
| } |
| |
| public static Map<Integer, NetworkTopology.DcAndRack> networkTopology(int nodeCount, |
| IntFunction<DcAndRack> dcAndRackSupplier) |
| { |
| |
| return IntStream.rangeClosed(1, nodeCount).boxed() |
| .collect(Collectors.toMap(nodeId -> nodeId, |
| dcAndRackSupplier::apply)); |
| } |
| } |