001package com.github.theholywaffle.teamspeak3.api.reconnect;
002
003/*
004 * #%L
005 * TeamSpeak 3 Java API
006 * %%
007 * Copyright (C) 2015 Bert De Geyter
008 * %%
009 * Permission is hereby granted, free of charge, to any person obtaining a copy
010 * of this software and associated documentation files (the "Software"), to deal
011 * in the Software without restriction, including without limitation the rights
012 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
013 * copies of the Software, and to permit persons to whom the Software is
014 * furnished to do so, subject to the following conditions:
015 * 
016 * The above copyright notice and this permission notice shall be included in
017 * all copies or substantial portions of the Software.
018 * 
019 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
020 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
021 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
022 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
023 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
024 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
025 * THE SOFTWARE.
026 * #L%
027 */
028
029import com.github.theholywaffle.teamspeak3.TS3Query;
030import com.github.theholywaffle.teamspeak3.api.exception.TS3ConnectionFailedException;
031import org.slf4j.Logger;
032import org.slf4j.LoggerFactory;
033
034public class ReconnectingConnectionHandler implements ConnectionHandler {
035
036        private static final Logger log = LoggerFactory.getLogger(ReconnectingConnectionHandler.class);
037
038        private final ConnectionHandler userConnectionHandler;
039        private final int startTimeout;
040        private final int timeoutCap;
041        private final int addend;
042        private final double multiplier;
043
044        public ReconnectingConnectionHandler(ConnectionHandler userConnectionHandler, int startTimeout,
045                                             int timeoutCap, int addend, double multiplier) {
046                this.userConnectionHandler = userConnectionHandler;
047                this.startTimeout = startTimeout;
048                this.timeoutCap = timeoutCap;
049                this.addend = addend;
050                this.multiplier = multiplier;
051        }
052
053        @Override
054        public void onConnect(TS3Query ts3Query) {
055                if (userConnectionHandler != null) {
056                        userConnectionHandler.onConnect(ts3Query);
057                }
058        }
059
060        @Override
061        public void onDisconnect(TS3Query ts3Query) {
062                // Announce disconnect and run user connection handler
063                log.info("[Connection] Disconnected from TS3 server - reconnecting in {}ms", startTimeout);
064                if (userConnectionHandler != null) {
065                        userConnectionHandler.onDisconnect(ts3Query);
066                }
067
068                int timeout = startTimeout;
069
070                while (true) {
071                        try {
072                                Thread.sleep(timeout);
073                        } catch (InterruptedException e) {
074                                return;
075                        }
076
077                        timeout = (int) Math.ceil(timeout * multiplier) + addend;
078                        if (timeoutCap > 0) timeout = Math.min(timeout, timeoutCap);
079
080                        try {
081                                ts3Query.connect();
082                                return; // Successfully reconnected, return
083                        } catch (TS3ConnectionFailedException conFailed) {
084                                // Ignore exception, announce reconnect failure
085                                log.debug("[Connection] Failed to reconnect - waiting {}ms until next attempt", timeout);
086                        }
087                }
088        }
089}