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* Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
*
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* permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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package mage.server.util;
import org.apache.log4j.Logger;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
/**
* Handles server messages (Messages of the Day). Reloads messages every 5
* minutes.
*
* @author nantuko
*/
public enum ServerMessagesUtil {
instance;
private static final Logger log = Logger.getLogger(ServerMessagesUtil.class);
private static final String SERVER_MSG_TXT_FILE = "server.msg.txt";
private ScheduledExecutorService updateExecutor;
private final List<String> messages = new ArrayList<>();
private final ReadWriteLock lock = new ReentrantReadWriteLock();
private static String pathToExternalMessages = null;
private static boolean ignore = false;
private static long startDate;
private static final AtomicInteger gamesStarted = new AtomicInteger(0);
private static final AtomicInteger tournamentsStarted = new AtomicInteger(0);
private static final AtomicInteger lostConnection = new AtomicInteger(0);
private static final AtomicInteger reconnects = new AtomicInteger(0);
static {
pathToExternalMessages = System.getProperty("messagesPath");
}
ServerMessagesUtil() {
updateExecutor = Executors.newSingleThreadScheduledExecutor();
updateExecutor.scheduleAtFixedRate(this::reloadMessages, 5, 5 * 60, TimeUnit.SECONDS);
}
public List<String> getMessages() {
lock.readLock().lock();
try {
return messages;
} finally {
lock.readLock().unlock();
}
}
private void reloadMessages() {
log.debug("Reading server messages...");
List<String> motdMessages = readFromFile();
List<String> newMessages = new ArrayList<>();
if (motdMessages != null) {
newMessages.addAll(motdMessages);
}
newMessages.add(getServerStatistics());
newMessages.add(getServerStatistics2());
lock.writeLock().lock();
try {
messages.clear();
messages.addAll(newMessages);
} finally {
lock.writeLock().unlock();
}
}
private List<String> readFromFile() {
if (ignore) {
return null;
}
File externalFile = null;
if (pathToExternalMessages != null) {
externalFile = new File(pathToExternalMessages);
if (!externalFile.exists()) {
log.warn("Couldn't find server.msg.txt using external path: " + pathToExternalMessages);
pathToExternalMessages = null; // not to repeat error action again
externalFile = null;
} else if (!externalFile.canRead()) {
log.warn("Couldn't read (no access) server.msg.txt using external path: " + pathToExternalMessages);
pathToExternalMessages = null; // not to repeat error action again
}
}
InputStream is = null;
if (externalFile != null) {
try {
is = new FileInputStream(externalFile);
} catch (Exception f) {
log.error(f, f);
pathToExternalMessages = null; // not to repeat error action again
}
} else {
File file = new File(SERVER_MSG_TXT_FILE);
if (!file.exists() || !file.canRead()) {
log.warn("Couldn't find server.msg.txt using path: " + SERVER_MSG_TXT_FILE);
} else {
try {
is = new FileInputStream(file);
} catch (Exception f) {
log.error(f, f);
ignore = true;
}
}
}
if (is == null) {
log.warn("Couldn't find server.msg");
return null;
}
Scanner scanner = new Scanner(is);
List<String> newMessages = new ArrayList<>();
while (scanner.hasNextLine()) {
String message = scanner.nextLine();
if (!message.trim().isEmpty()) {
newMessages.add(message.trim());
}
}
return newMessages;
}
private String getServerStatistics() {
long current = System.currentTimeMillis();
long hours = ((current - startDate) / (1000 * 60 * 60));
StringBuilder statistics = new StringBuilder("Server uptime: ");
statistics.append(hours);
statistics.append(" hour(s), games played: ");
statistics.append(gamesStarted.get());
statistics.append(" tournaments started: ");
statistics.append(tournamentsStarted.get());
return statistics.toString();
}
private String getServerStatistics2() {
long current = System.currentTimeMillis();
long minutes = ((current - startDate) / (1000 * 60));
if (minutes == 0) {
minutes = 1;
}
StringBuilder statistics = new StringBuilder("Disconnects: ");
statistics.append(lostConnection.get());
statistics.append(" avg/hour ").append(lostConnection.get() * 60 / minutes);
statistics.append(" Reconnects: ").append(reconnects.get());
statistics.append(" avg/hour ").append(reconnects.get() * 60 / minutes);
return statistics.toString();
}
// private Timer timer = new Timer(1000 * 60, new ActionListener() {
// public void actionPerformed(ActionEvent e) {
// reloadMessages();
// }
// });
public void setStartDate(long milliseconds) {
startDate = milliseconds;
}
public void incGamesStarted() {
int value;
do {
value = gamesStarted.get();
} while (!gamesStarted.compareAndSet(value, value + 1));
}
public void incTournamentsStarted() {
int value;
do {
value = tournamentsStarted.get();
} while (!tournamentsStarted.compareAndSet(value, value + 1));
}
public void incReconnects() {
int value;
do {
value = reconnects.get();
} while (!reconnects.compareAndSet(value, value + 1));
}
public void incLostConnection() {
int value;
do {
value = lostConnection.get();
} while (!lostConnection.compareAndSet(value, value + 1));
}
}