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package com.earth2me.essentials;
import com.google.common.io.Files;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentSkipListMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.logging.Level;
import java.util.regex.Pattern;
import org.bukkit.Bukkit;
public class UUIDMap
{
private final transient net.ess3.api.IEssentials ess;
private File userList;
private final transient Pattern splitPattern = Pattern.compile(",");
private static final ExecutorService EXECUTOR_SERVICE = Executors.newSingleThreadExecutor();
private final AtomicInteger pendingDiskWrites = new AtomicInteger(0);
public UUIDMap(final net.ess3.api.IEssentials ess)
{
this.ess = ess;
userList = new File(ess.getDataFolder(), "usermap.csv");
}
public void loadAllUsers(final ConcurrentSkipListMap<String, UUID> names, final ConcurrentSkipListMap<UUID, ArrayList<String>> history)
{
try
{
if (!userList.exists())
{
userList.createNewFile();
}
synchronized (pendingDiskWrites)
{
if (ess.getSettings().isDebug())
{
ess.getLogger().log(Level.INFO, "Reading usermap from disk");
}
names.clear();
history.clear();
final BufferedReader reader = new BufferedReader(new FileReader(userList));
try
{
while (true)
{
final String line = reader.readLine();
if (line == null)
{
break;
}
else
{
final String[] values = splitPattern.split(line);
if (values.length == 2)
{
final String name = values[0];
final UUID uuid = UUID.fromString(values[1]);
names.put(name, uuid);
if (!history.containsKey(uuid))
{
final ArrayList<String> list = new ArrayList<String>();
list.add(name);
history.put(uuid, list);
}
else
{
final ArrayList<String> list = history.get(uuid);
if (!list.contains(name))
{
list.add(name);
}
}
}
}
}
}
finally
{
reader.close();
}
}
}
catch (IOException ex)
{
Bukkit.getLogger().log(Level.SEVERE, ex.getMessage(), ex);
}
}
public void writeUUIDMap()
{
_writeUUIDMap();
}
public void forceWriteUUIDMap()
{
if (ess.getSettings().isDebug())
{
ess.getLogger().log(Level.INFO, "Forcing usermap write to disk");
}
try
{
Future<?> future = _writeUUIDMap();;
if (future != null)
{
future.get();
}
}
catch (InterruptedException ex)
{
ess.getLogger().log(Level.SEVERE, ex.getMessage(), ex);
}
catch (ExecutionException ex)
{
ess.getLogger().log(Level.SEVERE, ex.getMessage(), ex);
}
}
public Future<?> _writeUUIDMap()
{
final ConcurrentSkipListMap<String, UUID> names = ess.getUserMap().getNames();
if (names.size() < 1)
{
return null;
}
pendingDiskWrites.incrementAndGet();
Future<?> future = EXECUTOR_SERVICE.submit(new WriteRunner(ess.getDataFolder(), userList, names, pendingDiskWrites));
return future;
}
private static class WriteRunner implements Runnable
{
private final File location;
private final File endFile;
private final ConcurrentSkipListMap<String, UUID> names;
private final AtomicInteger pendingDiskWrites;
private WriteRunner(final File location, final File endFile, final ConcurrentSkipListMap<String, UUID> names, final AtomicInteger pendingDiskWrites)
{
this.location = location;
this.endFile = endFile;
this.names = names;
this.pendingDiskWrites = pendingDiskWrites;
}
@Override
public void run()
{
synchronized (pendingDiskWrites)
{
if (pendingDiskWrites.get() > 1)
{
pendingDiskWrites.decrementAndGet();
return;
}
File configFile = null;
try
{
configFile = File.createTempFile("usermap", ".tmp.csv", location);
final BufferedWriter bWriter = new BufferedWriter(new FileWriter(configFile));
for (Map.Entry<String, UUID> entry : names.entrySet())
{
bWriter.write(entry.getKey() + "," + entry.getValue().toString());
bWriter.newLine();
}
bWriter.close();
Files.move(configFile, endFile);
}
catch (IOException ex)
{
try
{
if (configFile != null && configFile.exists())
{
Files.move(configFile, new File(endFile.getParentFile(), "usermap.bak.csv"));
}
}
catch (Exception ex2)
{
Bukkit.getLogger().log(Level.SEVERE, ex2.getMessage(), ex2);
}
Bukkit.getLogger().log(Level.WARNING, ex.getMessage(), ex);
}
finally
{
pendingDiskWrites.decrementAndGet();
}
}
}
}
}
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