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;
031
032public class ReconnectingConnectionHandler implements ConnectionHandler {
033
034        private final ConnectionHandler userConnectionHandler;
035        private final int startTimeout;
036        private final int timeoutCap;
037        private final int addend;
038        private final double multiplier;
039
040        private int timeout = -1;
041
042        public ReconnectingConnectionHandler(ConnectionHandler userConnectionHandler, int startTimeout,
043                                                                                 int timeoutCap, int addend, double multiplier) {
044                this.userConnectionHandler = userConnectionHandler;
045                this.startTimeout = startTimeout;
046                this.timeoutCap = timeoutCap;
047                this.addend = addend;
048                this.multiplier = multiplier;
049        }
050
051        @Override
052        public void onConnect(TS3Query ts3Query) {
053                timeout = startTimeout;
054                if (userConnectionHandler != null) {
055                        userConnectionHandler.onConnect(ts3Query);
056                }
057        }
058
059        @Override
060        public void onDisconnect(TS3Query ts3Query) {
061                if (timeout < 0) {
062                        // Special case: We never connected
063                        // --> Something is probably not set up correctly
064                        // Do not attempt to reconnect
065                        return;
066                } else if (timeout == startTimeout) {
067                        // First run, announce disconnect
068                        TS3Query.log.info("[Connection] Disconnected from TS3 server");
069
070                        if (userConnectionHandler != null) {
071                                userConnectionHandler.onDisconnect(ts3Query);
072                        }
073                }
074
075                timeout = (int) Math.ceil(timeout * multiplier) + addend;
076                if (timeoutCap > 0) timeout = Math.min(timeout, timeoutCap);
077
078                try {
079                        Thread.sleep(timeout);
080                } catch (InterruptedException e) {
081                        return;
082                }
083
084                try {
085                        ts3Query.connect();
086                } catch (TS3ConnectionFailedException conFailed) {
087                        // Ignore exception, announce reconnect failure
088                        TS3Query.log.fine("[Connection] Failed to reconnect - waiting " + timeout + "ms until next attempt");
089                }
090        }
091}