| /* |
| * 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.simulator.systems; |
| |
| import java.net.InetSocketAddress; |
| import java.util.Comparator; |
| import java.util.function.Consumer; |
| import java.util.function.Function; |
| import java.util.stream.IntStream; |
| |
| import org.apache.cassandra.distributed.Cluster; |
| import org.apache.cassandra.distributed.api.IInstanceConfig; |
| import org.apache.cassandra.locator.IEndpointSnitch; |
| import org.apache.cassandra.locator.InetAddressAndPort; |
| import org.apache.cassandra.locator.Replica; |
| import org.apache.cassandra.locator.ReplicaCollection; |
| import org.apache.cassandra.simulator.cluster.NodeLookup; |
| |
| public class SimulatedSnitch extends NodeLookup |
| { |
| public static class Instance implements IEndpointSnitch |
| { |
| private static volatile Function<InetSocketAddress, String> LOOKUP_DC; |
| |
| public String getRack(InetAddressAndPort endpoint) |
| { |
| return LOOKUP_DC.apply(endpoint); |
| } |
| |
| public String getDatacenter(InetAddressAndPort endpoint) |
| { |
| return LOOKUP_DC.apply(endpoint); |
| } |
| |
| public <C extends ReplicaCollection<? extends C>> C sortedByProximity(InetAddressAndPort address, C addresses) |
| { |
| return addresses.sorted(Comparator.comparingInt(SimulatedSnitch::asInt)); |
| } |
| |
| public int compareEndpoints(InetAddressAndPort target, Replica r1, Replica r2) |
| { |
| return Comparator.comparingInt(SimulatedSnitch::asInt).compare(r1, r2); |
| } |
| |
| public void gossiperStarting() |
| { |
| } |
| |
| public boolean isWorthMergingForRangeQuery(ReplicaCollection<?> merged, ReplicaCollection<?> l1, ReplicaCollection<?> l2) |
| { |
| return false; |
| } |
| |
| public static void setup(Function<InetSocketAddress, String> lookupDc) |
| { |
| LOOKUP_DC = lookupDc; |
| } |
| } |
| |
| final int[] numInDcs; |
| final String[] nameOfDcs; |
| |
| public SimulatedSnitch(int[] nodeToDc, int[] numInDcs) |
| { |
| super(nodeToDc); |
| this.nameOfDcs = IntStream.range(0, numInDcs.length).mapToObj(i -> "dc" + i).toArray(String[]::new); |
| this.numInDcs = numInDcs; |
| } |
| |
| public int dcCount() |
| { |
| return nameOfDcs.length; |
| } |
| |
| public String nameOfDc(int i) |
| { |
| return nameOfDcs[i]; |
| } |
| |
| public Cluster.Builder setup(Cluster.Builder builder) |
| { |
| for (int i = 0 ; i < numInDcs.length ; ++i) |
| builder.withRack(nameOfDcs[i], nameOfDcs[i], numInDcs[i]); |
| Consumer<IInstanceConfig> prev = builder.getConfigUpdater(); |
| return builder.withConfig(config -> { |
| if (prev != null) |
| prev.accept(config); |
| config.set("endpoint_snitch", SimulatedSnitch.Instance.class.getName()) |
| .set("dynamic_snitch", false); |
| }); |
| } |
| |
| public Instance get() |
| { |
| return new Instance(); |
| } |
| |
| public void setup(Cluster cluster) |
| { |
| Function<InetSocketAddress, String> lookup = Cluster.getUniqueAddressLookup(cluster, i -> nameOfDcs[dcOf(i.config().num())])::get; |
| cluster.forEach(i -> i.unsafeAcceptOnThisThread(Instance::setup, lookup)); |
| Instance.setup(lookup); |
| } |
| |
| private static int asInt(Replica address) |
| { |
| byte[] bytes = address.endpoint().addressBytes; |
| return bytes[0] | (bytes[1] << 8) | (bytes[2] << 16) | (bytes[3] << 24); |
| } |
| } |