mirror of
https://github.com/dmulloy2/ProtocolLib.git
synced 2024-09-19 11:01:08 +02:00
Ignore logged out players.
This commit is contained in:
Kristian S. Stangeland
parent
627c500de1
commit
169842f265
@ -1,167 +1,168 @@
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/*
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* ProtocolLib - Bukkit server library that allows access to the Minecraft protocol.
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* Copyright (C) 2012 Kristian S. Stangeland
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with this program;
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* if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*/
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package com.comphenix.protocol;
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import java.lang.reflect.Field;
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import java.lang.reflect.Modifier;
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import java.util.ArrayList;
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import java.util.List;
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import com.comphenix.protocol.async.AsyncListenerHandler;
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import com.comphenix.protocol.error.ErrorReporter;
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import com.comphenix.protocol.error.Report;
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import com.comphenix.protocol.error.ReportType;
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import com.comphenix.protocol.events.ListeningWhitelist;
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import com.comphenix.protocol.events.PacketContainer;
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import com.comphenix.protocol.injector.BukkitUnwrapper;
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import com.comphenix.protocol.injector.server.AbstractInputStreamLookup;
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import com.comphenix.protocol.injector.server.TemporaryPlayerFactory;
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import com.comphenix.protocol.injector.spigot.SpigotPacketInjector;
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import com.comphenix.protocol.reflect.FieldUtils;
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import com.comphenix.protocol.reflect.FuzzyReflection;
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import com.comphenix.protocol.reflect.MethodUtils;
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import com.comphenix.protocol.reflect.ObjectWriter;
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import com.comphenix.protocol.reflect.compiler.BackgroundCompiler;
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import com.comphenix.protocol.reflect.compiler.StructureCompiler;
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import com.comphenix.protocol.reflect.instances.CollectionGenerator;
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import com.comphenix.protocol.reflect.instances.DefaultInstances;
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import com.comphenix.protocol.reflect.instances.PrimitiveGenerator;
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import com.comphenix.protocol.utility.MinecraftReflection;
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import com.comphenix.protocol.wrappers.ChunkPosition;
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import com.comphenix.protocol.wrappers.WrappedDataWatcher;
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import com.comphenix.protocol.wrappers.WrappedWatchableObject;
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import com.comphenix.protocol.wrappers.nbt.io.NbtBinarySerializer;
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/**
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* Used to fix ClassLoader leaks that may lead to filling up the permanent generation.
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*
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* @author Kristian
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*/
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class CleanupStaticMembers {
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// Reports
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public final static ReportType REPORT_CANNOT_RESET_FIELD = new ReportType("Unable to reset field %s: %s");
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public final static ReportType REPORT_CANNOT_UNLOAD_CLASS = new ReportType("Unable to unload class %s.");
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private ClassLoader loader;
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private ErrorReporter reporter;
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public CleanupStaticMembers(ClassLoader loader, ErrorReporter reporter) {
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this.loader = loader;
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this.reporter = reporter;
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}
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/**
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* Ensure that the previous ClassLoader is not leaking.
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*/
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public void resetAll() {
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// This list must always be updated
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Class<?>[] publicClasses = {
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AsyncListenerHandler.class, ListeningWhitelist.class, PacketContainer.class,
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BukkitUnwrapper.class, DefaultInstances.class, CollectionGenerator.class,
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PrimitiveGenerator.class, FuzzyReflection.class, MethodUtils.class,
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BackgroundCompiler.class, StructureCompiler.class,
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ObjectWriter.class, Packets.Server.class, Packets.Client.class,
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ChunkPosition.class, WrappedDataWatcher.class, WrappedWatchableObject.class,
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AbstractInputStreamLookup.class, TemporaryPlayerFactory.class, SpigotPacketInjector.class,
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MinecraftReflection.class, NbtBinarySerializer.class
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};
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String[] internalClasses = {
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"com.comphenix.protocol.events.SerializedOfflinePlayer",
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"com.comphenix.protocol.injector.player.InjectedServerConnection",
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"com.comphenix.protocol.injector.player.NetworkFieldInjector",
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"com.comphenix.protocol.injector.player.NetworkObjectInjector",
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"com.comphenix.protocol.injector.player.NetworkServerInjector",
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"com.comphenix.protocol.injector.player.PlayerInjector",
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"com.comphenix.protocol.injector.EntityUtilities",
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"com.comphenix.protocol.injector.packet.PacketRegistry",
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"com.comphenix.protocol.injector.packet.PacketInjector",
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"com.comphenix.protocol.injector.packet.ReadPacketModifier",
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"com.comphenix.protocol.injector.StructureCache",
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"com.comphenix.protocol.reflect.compiler.BoxingHelper",
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"com.comphenix.protocol.reflect.compiler.MethodDescriptor",
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"com.comphenix.protocol.wrappers.nbt.WrappedElement",
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};
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resetClasses(publicClasses);
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resetClasses(getClasses(loader, internalClasses));
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}
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private void resetClasses(Class<?>[] classes) {
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// Reset each class one by one
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for (Class<?> clazz : classes) {
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resetClass(clazz);
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}
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}
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private void resetClass(Class<?> clazz) {
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for (Field field : clazz.getFields()) {
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Class<?> type = field.getType();
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// Only check static non-primitive fields. We also skip strings.
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if (Modifier.isStatic(field.getModifiers()) &&
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!type.isPrimitive() && !type.equals(String.class)) {
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try {
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setFinalStatic(field, null);
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} catch (IllegalAccessException e) {
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// Just inform the player
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reporter.reportWarning(this,
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Report.newBuilder(REPORT_CANNOT_RESET_FIELD).error(e).messageParam(field.getName(), e.getMessage())
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);
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}
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}
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}
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}
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// HACK! HAACK!
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private static void setFinalStatic(Field field, Object newValue) throws IllegalAccessException {
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int modifier = field.getModifiers();
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boolean isFinal = Modifier.isFinal(modifier);
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Field modifiersField = isFinal ? FieldUtils.getField(Field.class, "modifiers", true) : null;
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// We have to remove the final field first
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if (isFinal) {
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FieldUtils.writeField(modifiersField, field, modifier & ~Modifier.FINAL, true);
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}
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// Now we can safely modify the field
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FieldUtils.writeStaticField(field, newValue, true);
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// Revert modifier
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if (isFinal) {
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FieldUtils.writeField(modifiersField, field, modifier, true);
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}
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}
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private Class<?>[] getClasses(ClassLoader loader, String[] names) {
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List<Class<?>> output = new ArrayList<Class<?>>();
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for (String name : names) {
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try {
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output.add(loader.loadClass(name));
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} catch (ClassNotFoundException e) {
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// Warn the user
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reporter.reportWarning(this, Report.newBuilder(REPORT_CANNOT_UNLOAD_CLASS).error(e).messageParam(name));
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}
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}
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return output.toArray(new Class<?>[0]);
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}
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}
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/*
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* ProtocolLib - Bukkit server library that allows access to the Minecraft protocol.
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* Copyright (C) 2012 Kristian S. Stangeland
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with this program;
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* if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*/
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package com.comphenix.protocol;
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import java.lang.reflect.Field;
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import java.lang.reflect.Modifier;
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import java.util.ArrayList;
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import java.util.List;
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import com.comphenix.protocol.async.AsyncListenerHandler;
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import com.comphenix.protocol.error.ErrorReporter;
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import com.comphenix.protocol.error.Report;
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import com.comphenix.protocol.error.ReportType;
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import com.comphenix.protocol.events.ListeningWhitelist;
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import com.comphenix.protocol.events.PacketContainer;
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import com.comphenix.protocol.injector.BukkitUnwrapper;
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import com.comphenix.protocol.injector.server.AbstractInputStreamLookup;
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import com.comphenix.protocol.injector.server.TemporaryPlayerFactory;
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import com.comphenix.protocol.injector.spigot.SpigotPacketInjector;
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import com.comphenix.protocol.reflect.FieldUtils;
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import com.comphenix.protocol.reflect.FuzzyReflection;
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import com.comphenix.protocol.reflect.MethodUtils;
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import com.comphenix.protocol.reflect.ObjectWriter;
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import com.comphenix.protocol.reflect.compiler.BackgroundCompiler;
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import com.comphenix.protocol.reflect.compiler.StructureCompiler;
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import com.comphenix.protocol.reflect.instances.CollectionGenerator;
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import com.comphenix.protocol.reflect.instances.DefaultInstances;
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import com.comphenix.protocol.reflect.instances.PrimitiveGenerator;
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import com.comphenix.protocol.utility.MinecraftReflection;
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import com.comphenix.protocol.wrappers.ChunkPosition;
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import com.comphenix.protocol.wrappers.WrappedDataWatcher;
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import com.comphenix.protocol.wrappers.WrappedWatchableObject;
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import com.comphenix.protocol.wrappers.nbt.io.NbtBinarySerializer;
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/**
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* Used to fix ClassLoader leaks that may lead to filling up the permanent generation.
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*
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* @author Kristian
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*/
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class CleanupStaticMembers {
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// Reports
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public final static ReportType REPORT_CANNOT_RESET_FIELD = new ReportType("Unable to reset field %s: %s");
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public final static ReportType REPORT_CANNOT_UNLOAD_CLASS = new ReportType("Unable to unload class %s.");
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private ClassLoader loader;
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private ErrorReporter reporter;
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public CleanupStaticMembers(ClassLoader loader, ErrorReporter reporter) {
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this.loader = loader;
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this.reporter = reporter;
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}
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/**
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* Ensure that the previous ClassLoader is not leaking.
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*/
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public void resetAll() {
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// This list must always be updated
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Class<?>[] publicClasses = {
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AsyncListenerHandler.class, ListeningWhitelist.class, PacketContainer.class,
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BukkitUnwrapper.class, DefaultInstances.class, CollectionGenerator.class,
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PrimitiveGenerator.class, FuzzyReflection.class, MethodUtils.class,
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BackgroundCompiler.class, StructureCompiler.class,
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ObjectWriter.class, Packets.Server.class, Packets.Client.class,
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ChunkPosition.class, WrappedDataWatcher.class, WrappedWatchableObject.class,
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AbstractInputStreamLookup.class, TemporaryPlayerFactory.class, SpigotPacketInjector.class,
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MinecraftReflection.class, NbtBinarySerializer.class
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};
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String[] internalClasses = {
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"com.comphenix.protocol.events.SerializedOfflinePlayer",
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"com.comphenix.protocol.injector.player.InjectedServerConnection",
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"com.comphenix.protocol.injector.player.NetworkFieldInjector",
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"com.comphenix.protocol.injector.player.NetworkObjectInjector",
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"com.comphenix.protocol.injector.player.NetworkServerInjector",
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"com.comphenix.protocol.injector.player.PlayerInjector",
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"com.comphenix.protocol.injector.EntityUtilities",
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"com.comphenix.protocol.injector.packet.PacketRegistry",
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"com.comphenix.protocol.injector.packet.PacketInjector",
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"com.comphenix.protocol.injector.packet.ReadPacketModifier",
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"com.comphenix.protocol.injector.StructureCache",
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"com.comphenix.protocol.reflect.compiler.BoxingHelper",
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"com.comphenix.protocol.reflect.compiler.MethodDescriptor",
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"com.comphenix.protocol.wrappers.nbt.WrappedElement",
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};
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resetClasses(publicClasses);
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resetClasses(getClasses(loader, internalClasses));
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}
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private void resetClasses(Class<?>[] classes) {
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// Reset each class one by one
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for (Class<?> clazz : classes) {
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resetClass(clazz);
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}
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}
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private void resetClass(Class<?> clazz) {
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for (Field field : clazz.getFields()) {
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Class<?> type = field.getType();
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// Only check static non-primitive fields. We also skip strings.
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if (Modifier.isStatic(field.getModifiers()) &&
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!type.isPrimitive() && !type.equals(String.class)) {
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try {
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setFinalStatic(field, null);
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} catch (IllegalAccessException e) {
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// Just inform the player
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reporter.reportWarning(this,
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Report.newBuilder(REPORT_CANNOT_RESET_FIELD).error(e).messageParam(field.getName(), e.getMessage())
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);
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e.printStackTrace();
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}
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}
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}
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}
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// HACK! HAACK!
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private static void setFinalStatic(Field field, Object newValue) throws IllegalAccessException {
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int modifier = field.getModifiers();
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boolean isFinal = Modifier.isFinal(modifier);
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Field modifiersField = isFinal ? FieldUtils.getField(Field.class, "modifiers", true) : null;
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// We have to remove the final field first
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if (isFinal) {
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FieldUtils.writeField(modifiersField, field, modifier & ~Modifier.FINAL, true);
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}
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// Now we can safely modify the field
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FieldUtils.writeStaticField(field, newValue, true);
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// Revert modifier
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if (isFinal) {
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FieldUtils.writeField(modifiersField, field, modifier, true);
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}
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}
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private Class<?>[] getClasses(ClassLoader loader, String[] names) {
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List<Class<?>> output = new ArrayList<Class<?>>();
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for (String name : names) {
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try {
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output.add(loader.loadClass(name));
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} catch (ClassNotFoundException e) {
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// Warn the user
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reporter.reportWarning(this, Report.newBuilder(REPORT_CANNOT_UNLOAD_CLASS).error(e).messageParam(name));
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}
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}
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return output.toArray(new Class<?>[0]);
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}
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}
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