100 lines
3.4 KiB
Java
100 lines
3.4 KiB
Java
/*
|
|
* This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
|
|
* Copyright (C) 2016-2024 ViaVersion and contributors
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
package com.viaversion.viaversion.platform;
|
|
|
|
import com.viaversion.viaversion.api.platform.ProtocolDetectorService;
|
|
import it.unimi.dsi.fastutil.objects.Object2IntMap;
|
|
import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap;
|
|
import java.util.Map;
|
|
import java.util.concurrent.locks.ReadWriteLock;
|
|
import java.util.concurrent.locks.ReentrantReadWriteLock;
|
|
|
|
public abstract class AbstractProtocolDetectorService implements ProtocolDetectorService {
|
|
protected final Object2IntMap<String> detectedProtocolIds = new Object2IntOpenHashMap<>();
|
|
protected final ReadWriteLock lock = new ReentrantReadWriteLock();
|
|
|
|
protected AbstractProtocolDetectorService() {
|
|
detectedProtocolIds.defaultReturnValue(-1);
|
|
}
|
|
|
|
@Override
|
|
public int serverProtocolVersion(final String serverName) {
|
|
// Step 1. Check detected
|
|
lock.readLock().lock();
|
|
final int detectedProtocol;
|
|
try {
|
|
detectedProtocol = detectedProtocolIds.getInt(serverName);
|
|
} finally {
|
|
lock.readLock().unlock();
|
|
}
|
|
if (detectedProtocol != -1) {
|
|
return detectedProtocol;
|
|
}
|
|
|
|
// Step 2. Check config (CME moment?)
|
|
final Map<String, Integer> servers = configuredServers();
|
|
final Integer protocol = servers.get(serverName);
|
|
if (protocol != null) {
|
|
return protocol;
|
|
}
|
|
|
|
// Step 3. Use Default (CME moment intensifies?)
|
|
final Integer defaultProtocol = servers.get("default");
|
|
if (defaultProtocol != null) {
|
|
return defaultProtocol;
|
|
}
|
|
|
|
// Step 4: Use the proxy's lowest supported... *cries*
|
|
return lowestSupportedProtocolVersion();
|
|
}
|
|
|
|
@Override
|
|
public void setProtocolVersion(final String serverName, final int protocolVersion) {
|
|
lock.writeLock().lock();
|
|
try {
|
|
detectedProtocolIds.put(serverName, protocolVersion);
|
|
} finally {
|
|
lock.writeLock().unlock();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public int uncacheProtocolVersion(final String serverName) {
|
|
lock.writeLock().lock();
|
|
try {
|
|
return detectedProtocolIds.removeInt(serverName);
|
|
} finally {
|
|
lock.writeLock().unlock();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Object2IntMap<String> detectedProtocolVersions() {
|
|
lock.readLock().lock();
|
|
try {
|
|
return new Object2IntOpenHashMap<>(detectedProtocolIds);
|
|
} finally {
|
|
lock.readLock().unlock();
|
|
}
|
|
}
|
|
|
|
protected abstract Map<String, Integer> configuredServers();
|
|
|
|
protected abstract int lowestSupportedProtocolVersion();
|
|
}
|