84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Modified by Cloudius Systems.
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* Copyright 2015 Cloudius Systems.
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*/
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#pragma once
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#include "core/sstring.hh"
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#include "gms/inet_address.hh"
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#include "locator/abstract_endpoint_snitch.hh"
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namespace locator {
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using inet_address = gms::inet_address;
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/**
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* An endpoint snitch tells Cassandra information about network topology that it can use to route
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* requests more efficiently.
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*/
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class abstract_network_topology_snitch : public abstract_endpoint_snitch {
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public:
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/**
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* Return the rack for which an endpoint resides in
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* @param endpoint a specified endpoint
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* @return string of rack
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*/
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// virtual sstring get_rack(inet_address endpoint) = 0;
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/**
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* Return the data center for which an endpoint resides in
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* @param endpoint a specified endpoint
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* @return string of data center
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*/
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// virtual sstring get_datacenter(inet_address endpoint) = 0;
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virtual int compare_endpoints(inet_address& address, inet_address& a1, inet_address& a2) override {
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if (address == a1 && !(address == a2)) {
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return -1;
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}
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if (address == a2 && !(address == a1)) {
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return 1;
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}
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sstring address_datacenter = get_datacenter(address);
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sstring a1_datacenter = get_datacenter(a1);
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sstring a2_datacenter = get_datacenter(a2);
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if (address_datacenter == a1_datacenter && !(address_datacenter == a2_datacenter)) {
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return -1;
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}
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if (address_datacenter == a2_datacenter && !(address_datacenter == a1_datacenter)) {
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return 1;
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}
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sstring address_rack = get_rack(address);
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sstring a1_rack = get_rack(a1);
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sstring a2_rack = get_rack(a2);
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if (address_rack == a1_rack && !(address_rack == a2_rack)) {
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return -1;
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}
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if (address_rack == a2_rack && !(address_rack == a1_rack)) {
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return 1;
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}
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return 0;
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}
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};
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} // namespace locator
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