Java tutorial
/* * Minecraft Forge * Copyright (c) 2016. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation version 2.1 * of the License. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ package net.minecraftforge.fml.server; import java.io.*; import java.util.Iterator; import java.util.List; import java.util.Set; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; import net.minecraft.launchwrapper.Launch; import net.minecraft.network.INetHandler; import net.minecraft.network.NetHandlerPlayServer; import net.minecraft.network.NetworkManager; import net.minecraft.server.MinecraftServer; import net.minecraft.server.dedicated.DedicatedServer; import net.minecraft.server.dedicated.PendingCommand; import net.minecraft.util.IThreadListener; import net.minecraft.util.text.translation.LanguageMap; import net.minecraft.world.storage.SaveFormatOld; import net.minecraftforge.fml.common.FMLCommonHandler; import net.minecraftforge.fml.common.FMLLog; import net.minecraftforge.fml.common.IFMLSidedHandler; import net.minecraftforge.fml.common.Loader; import net.minecraftforge.fml.common.ModContainer; import net.minecraftforge.fml.common.StartupQuery; import net.minecraftforge.fml.common.eventhandler.EventBus; import net.minecraftforge.fml.common.functions.GenericIterableFactory; import net.minecraftforge.fml.common.network.FMLNetworkEvent; import net.minecraftforge.fml.relauncher.Side; import com.google.common.collect.ImmutableList; import org.apache.commons.io.IOUtils; /** * Handles primary communication from hooked code into the system * * The FML entry point is {@link #beginServerLoading(MinecraftServer)} called from * {@link net.minecraft.server.dedicated.DedicatedServer} * * Obfuscated code should focus on this class and other members of the "server" * (or "client") code * * The actual mod loading is handled at arms length by {@link Loader} * * It is expected that a similar class will exist for each target environment: * Bukkit and Client side. * * It should not be directly modified. * * @author cpw * */ public class FMLServerHandler implements IFMLSidedHandler { /** * The singleton */ private static final FMLServerHandler INSTANCE = new FMLServerHandler(); /** * A reference to the server itself */ private MinecraftServer server; private List<String> injectedModContainers; private FMLServerHandler() { injectedModContainers = FMLCommonHandler.instance().beginLoading(this); } /** * Called to start the whole game off from * {@link MinecraftServer#startServer} * * @param minecraftServer server */ @Override public void beginServerLoading(MinecraftServer minecraftServer) { server = minecraftServer; Loader.instance().loadMods(injectedModContainers); Loader.instance().preinitializeMods(); } /** * Called a bit later on during server initialization to finish loading mods */ @Override public void finishServerLoading() { Loader.instance().initializeMods(); } @Override public void haltGame(String message, Throwable exception) { throw new RuntimeException(message, exception); } @Override public File getSavesDirectory() { return ((SaveFormatOld) server.getActiveAnvilConverter()).savesDirectory; } /** * Get the server instance */ @Override public MinecraftServer getServer() { return server; } /** * @return the instance */ public static FMLServerHandler instance() { return INSTANCE; } /* (non-Javadoc) * @see net.minecraftforge.fml.common.IFMLSidedHandler#getAdditionalBrandingInformation() */ @Override public List<String> getAdditionalBrandingInformation() { return ImmutableList.<String>of(); } /* (non-Javadoc) * @see net.minecraftforge.fml.common.IFMLSidedHandler#getSide() */ @Override public Side getSide() { return Side.SERVER; } @Override public void showGuiScreen(Object clientGuiElement) { } @Override public void queryUser(StartupQuery query) throws InterruptedException { if (query.getResult() == null) { FMLLog.warning("%s", query.getText()); query.finish(); } else { String text = query.getText() + "\n\nRun the command /fml confirm or or /fml cancel to proceed." + "\nAlternatively start the server with -Dfml.queryResult=confirm or -Dfml.queryResult=cancel to preselect the answer."; FMLLog.warning("%s", text); if (!query.isSynchronous()) return; // no-op until mc does commands in another thread (if ever) boolean done = false; while (!done && server.isServerRunning()) { if (Thread.interrupted()) throw new InterruptedException(); DedicatedServer dedServer = (DedicatedServer) server; // rudimentary command processing, check for fml confirm/cancel and stop commands synchronized (dedServer.pendingCommandList) { for (Iterator<PendingCommand> it = GenericIterableFactory .newCastingIterable(dedServer.pendingCommandList, PendingCommand.class).iterator(); it .hasNext();) { String cmd = it.next().command.trim().toLowerCase(); if (cmd.equals("/fml confirm")) { FMLLog.info("confirmed"); query.setResult(true); done = true; it.remove(); } else if (cmd.equals("/fml cancel")) { FMLLog.info("cancelled"); query.setResult(false); done = true; it.remove(); } else if (cmd.equals("/stop")) { StartupQuery.abort(); } } } Thread.sleep(10L); } query.finish(); } } @Override public boolean shouldServerShouldBeKilledQuietly() { return false; } @Override public void addModAsResource(ModContainer container) { String langFile = "assets/" + container.getModId().toLowerCase() + "/lang/en_US.lang"; File source = container.getSource(); InputStream stream = null; ZipFile zip = null; try { if (source.isDirectory() && (Boolean) Launch.blackboard.get("fml.deobfuscatedEnvironment")) { stream = new FileInputStream(new File(source.toURI().resolve(langFile).getPath())); } else { zip = new ZipFile(source); ZipEntry entry = zip.getEntry(langFile); if (entry == null) throw new FileNotFoundException(); stream = zip.getInputStream(entry); } LanguageMap.inject(stream); } catch (IOException e) { // hush } catch (Exception e) { FMLLog.getLogger().error(e); } finally { IOUtils.closeQuietly(stream); try { if (zip != null) zip.close(); } catch (IOException e) { // shush } } } @Override public String getCurrentLanguage() { return "en_US"; } @Override public void serverStopped() { // NOOP } @Override public NetworkManager getClientToServerNetworkManager() { throw new RuntimeException("Missing"); } @Override public INetHandler getClientPlayHandler() { return null; } @Override public void fireNetRegistrationEvent(EventBus bus, NetworkManager manager, Set<String> channelSet, String channel, Side side) { bus.post(new FMLNetworkEvent.CustomPacketRegistrationEvent<NetHandlerPlayServer>(manager, channelSet, channel, side, NetHandlerPlayServer.class)); } @Override public boolean shouldAllowPlayerLogins() { return DedicatedServer.allowPlayerLogins; } @Override public void allowLogins() { DedicatedServer.allowPlayerLogins = true; } @Override public IThreadListener getWorldThread(INetHandler net) { // Always the server on the dedicated server, eventually add Per-World if Mojang adds world stuff. return getServer(); } @Override public void processWindowMessages() { // NOOP } @Override public String stripSpecialChars(String message) { return message; } @Override public void reloadRenderers() { // NOOP } @Override public void fireSidedRegistryEvents() { // NOOP } }