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.TS3Api;
030import com.github.theholywaffle.teamspeak3.TS3Query;
031import com.github.theholywaffle.teamspeak3.api.exception.TS3ConnectionFailedException;
032import org.slf4j.Logger;
033import org.slf4j.LoggerFactory;
034
035public class ReconnectingConnectionHandler implements ConnectionHandler {
036
037        private static final Logger log = LoggerFactory.getLogger(ReconnectingConnectionHandler.class);
038
039        private final ConnectionHandler userConnectionHandler;
040        private final int startTimeout;
041        private final int timeoutCap;
042        private final int addend;
043        private final double multiplier;
044
045        public ReconnectingConnectionHandler(ConnectionHandler userConnectionHandler, int startTimeout,
046                                             int timeoutCap, int addend, double multiplier) {
047                this.userConnectionHandler = userConnectionHandler;
048                this.startTimeout = startTimeout;
049                this.timeoutCap = timeoutCap;
050                this.addend = addend;
051                this.multiplier = multiplier;
052        }
053
054        @Override
055        public void onConnect(TS3Api api) {
056                if (userConnectionHandler != null) {
057                        userConnectionHandler.onConnect(api);
058                }
059        }
060
061        @Override
062        public void onDisconnect(TS3Query ts3Query) {
063                // Announce disconnect and run user connection handler
064                log.info("[Connection] Disconnected from TS3 server - reconnecting in {}ms", startTimeout);
065                if (userConnectionHandler != null) {
066                        userConnectionHandler.onDisconnect(ts3Query);
067                }
068
069                int timeout = startTimeout;
070
071                while (true) {
072                        try {
073                                Thread.sleep(timeout);
074                        } catch (InterruptedException e) {
075                                return;
076                        }
077
078                        timeout = (int) Math.ceil(timeout * multiplier) + addend;
079                        if (timeoutCap > 0) timeout = Math.min(timeout, timeoutCap);
080
081                        try {
082                                ts3Query.connect();
083                                return; // Successfully reconnected, return
084                        } catch (TS3ConnectionFailedException conFailed) {
085                                // Ignore exception, announce reconnect failure
086                                log.debug("[Connection] Failed to reconnect - waiting {}ms until next attempt", timeout);
087                        }
088                }
089        }
090}