66 lines
2.1 KiB
Java
66 lines
2.1 KiB
Java
/*
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* The MIT License (MIT)
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*
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* Copyright © 2020 xrv <xrg@live.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package io.github.ehlxr.hashing.consistent;
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import java.util.SortedMap;
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import java.util.TreeMap;
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public class Cluster {
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private static final int SERVER_SIZE_MAX = 1024;
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private final SortedMap<Integer, Server> servers = new TreeMap<>();
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private int size = 0;
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public void put(Entry e) {
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routeServer(e.hashCode()).put(e);
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}
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public Entry get(Entry e) {
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return routeServer(e.hashCode()).get(e);
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}
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public Server routeServer(int hash) {
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if (servers.isEmpty())
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return null;
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if (!servers.containsKey(hash)) {
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SortedMap<Integer, Server> tailMap = servers.tailMap(hash);
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hash = tailMap.isEmpty() ? servers.firstKey() : tailMap.firstKey();
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// hash = servers.firstKey();
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}
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return servers.get(hash);
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}
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public boolean addServer(Server s) {
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if (size >= SERVER_SIZE_MAX)
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return false;
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servers.put(s.hashCode(), s);
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size++;
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return true;
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}
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}
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