/** * 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.locator; import java.net.InetAddress; import java.net.UnknownHostException; import java.util.*; /** * A simple endpoint snitch implementation that assumes rack and dc information is encoded * in the ip address. */ public class EndPointSnitch extends AbstractEndpointSnitch { public boolean isOnSameRack(InetAddress host, InetAddress host2) throws UnknownHostException { /* * Look at the IP Address of the two hosts. Compare * the 3rd octet. If they are the same then the hosts * are in the same rack else different racks. */ byte[] ip = host.getAddress(); byte[] ip2 = host2.getAddress(); return ip[2] == ip2[2]; } public boolean isInSameDataCenter(InetAddress host, InetAddress host2) throws UnknownHostException { /* * Look at the IP Address of the two hosts. Compare * the 2nd octet. If they are the same then the hosts * are in the same datacenter else different datacenter. */ byte[] ip = host.getAddress(); byte[] ip2 = host2.getAddress(); return ip[1] == ip2[1]; } public String getLocation(InetAddress endpoint) throws UnknownHostException { throw new UnknownHostException("Not Supported"); } }