Java tutorial
/* * Forge Mod Loader * Copyright (c) 2012-2013 cpw. * All rights reserved. This program and the accompanying materials * are made available under the terms of the GNU Lesser Public License v2.1 * which accompanies this distribution, and is available at * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html * * Contributors: * cpw - implementation */ package cpw.mods.fml.common.network.internal; import io.netty.channel.ChannelPipeline; import io.netty.channel.embedded.EmbeddedChannel; import java.util.ArrayList; import java.util.EnumMap; import java.util.List; import java.util.Map; import java.util.Map.Entry; import net.minecraft.entity.Entity; import net.minecraft.entity.player.EntityPlayer; import net.minecraft.entity.player.EntityPlayerMP; import net.minecraft.inventory.Container; import net.minecraft.network.NetworkManager; import net.minecraft.network.Packet; import net.minecraft.server.management.ServerConfigurationManager; import net.minecraft.world.World; import org.apache.logging.log4j.core.helpers.Integers; import com.google.common.collect.Lists; import com.google.gson.JsonArray; import com.google.gson.JsonObject; import cpw.mods.fml.common.FMLCommonHandler; import cpw.mods.fml.common.FMLContainer; import cpw.mods.fml.common.FMLLog; import cpw.mods.fml.common.Loader; import cpw.mods.fml.common.ModContainer; import cpw.mods.fml.common.network.FMLEmbeddedChannel; import cpw.mods.fml.common.network.FMLOutboundHandler; import cpw.mods.fml.common.network.FMLOutboundHandler.OutboundTarget; import cpw.mods.fml.common.network.NetworkRegistry; import cpw.mods.fml.common.network.handshake.FMLHandshakeMessage; import cpw.mods.fml.common.network.handshake.NetworkDispatcher; import cpw.mods.fml.common.network.internal.FMLMessage.CompleteHandshake; import cpw.mods.fml.common.registry.EntityRegistry; import cpw.mods.fml.common.registry.EntityRegistry.EntityRegistration; import cpw.mods.fml.relauncher.Side; import cpw.mods.fml.relauncher.SideOnly; public class FMLNetworkHandler { public static final int READ_TIMEOUT = Integers.parseInt(System.getProperty("fml.readTimeout", "30"), 30); public static final int LOGIN_TIMEOUT = Integers.parseInt(System.getProperty("fml.loginTimeout", "600"), 600); private static EnumMap<Side, FMLEmbeddedChannel> channelPair; public static void fmlServerHandshake(ServerConfigurationManager scm, NetworkManager manager, EntityPlayerMP player) { NetworkDispatcher dispatcher = NetworkDispatcher.allocAndSet(manager, scm); dispatcher.serverToClientHandshake(player); } public static void fmlClientHandshake(NetworkManager field_147393_d) { NetworkDispatcher dispatcher = NetworkDispatcher.allocAndSet(field_147393_d); dispatcher.clientToServerHandshake(); } public static void openGui(EntityPlayer entityPlayer, Object mod, int modGuiId, World world, int x, int y, int z) { ModContainer mc = FMLCommonHandler.instance().findContainerFor(mod); if (entityPlayer instanceof EntityPlayerMP) { EntityPlayerMP entityPlayerMP = (EntityPlayerMP) entityPlayer; Container remoteGuiContainer = NetworkRegistry.INSTANCE.getRemoteGuiContainer(mc, entityPlayerMP, modGuiId, world, x, y, z); if (remoteGuiContainer != null) { entityPlayerMP.getNextWindowId(); entityPlayerMP.closeContainer(); int windowId = entityPlayerMP.currentWindowId; FMLMessage.OpenGui openGui = new FMLMessage.OpenGui(windowId, mc.getModId(), modGuiId, x, y, z); EmbeddedChannel embeddedChannel = channelPair.get(Side.SERVER); embeddedChannel.attr(FMLOutboundHandler.FML_MESSAGETARGET).set(OutboundTarget.PLAYER); embeddedChannel.attr(FMLOutboundHandler.FML_MESSAGETARGETARGS).set(entityPlayerMP); embeddedChannel.writeOutbound(openGui); entityPlayerMP.openContainer = remoteGuiContainer; entityPlayerMP.openContainer.windowId = windowId; entityPlayerMP.openContainer.addCraftingToCrafters(entityPlayerMP); } } else if (FMLCommonHandler.instance().getSide().equals(Side.CLIENT)) { Object guiContainer = NetworkRegistry.INSTANCE.getLocalGuiContainer(mc, entityPlayer, modGuiId, world, x, y, z); FMLCommonHandler.instance().showGuiScreen(guiContainer); } else { FMLLog.fine( "Invalid attempt to open a local GUI on a dedicated server. This is likely a bug. GUIID: %s,%d", mc.getModId(), modGuiId); } } public static void makeEntitySpawnAdjustment(Entity entity, EntityPlayerMP player, int serverX, int serverY, int serverZ) { EmbeddedChannel embeddedChannel = channelPair.get(Side.SERVER); embeddedChannel.attr(FMLOutboundHandler.FML_MESSAGETARGET).set(OutboundTarget.PLAYER); embeddedChannel.attr(FMLOutboundHandler.FML_MESSAGETARGETARGS).set(player); embeddedChannel.writeOutbound(new FMLMessage.EntityAdjustMessage(entity, serverX, serverY, serverZ)); } public static Packet getEntitySpawningPacket(Entity entity) { EntityRegistration er = EntityRegistry.instance().lookupModSpawn(entity.getClass(), false); if (er == null) { return null; } if (er.usesVanillaSpawning()) { return null; } return channelPair.get(Side.SERVER) .generatePacketFrom(new FMLMessage.EntitySpawnMessage(er, entity, er.getContainer())); } public static String checkModList(FMLHandshakeMessage.ModList modListPacket, Side side) { Map<String, String> modList = modListPacket.modList(); return checkModList(modList, side); } public static String checkModList(Map<String, String> listData, Side side) { List<ModContainer> rejects = Lists.newArrayList(); for (Entry<ModContainer, NetworkModHolder> networkMod : NetworkRegistry.INSTANCE.registry().entrySet()) { boolean result = networkMod.getValue().check(listData, side); if (!result) { rejects.add(networkMod.getKey()); } } if (rejects.isEmpty()) { return null; } else { FMLLog.info("Rejecting connection %s: %s", side, rejects); return String.format("Mod rejections %s", rejects); } } @SideOnly(Side.CLIENT) private static void addClientHandlers() { ChannelPipeline pipeline = channelPair.get(Side.CLIENT).pipeline(); String targetName = channelPair.get(Side.CLIENT).findChannelHandlerNameForType(FMLRuntimeCodec.class); pipeline.addAfter(targetName, "GuiHandler", new OpenGuiHandler()); pipeline.addAfter(targetName, "EntitySpawnHandler", new EntitySpawnHandler()); } public static void registerChannel(FMLContainer container, Side side) { channelPair = NetworkRegistry.INSTANCE.newChannel(container, "FML", new FMLRuntimeCodec(), new HandshakeCompletionHandler()); EmbeddedChannel embeddedChannel = channelPair.get(Side.SERVER); embeddedChannel.attr(FMLOutboundHandler.FML_MESSAGETARGET).set(OutboundTarget.NOWHERE); if (side == Side.CLIENT) { addClientHandlers(); } } public static List<FMLProxyPacket> forwardHandshake(CompleteHandshake push, NetworkDispatcher target, Side side) { channelPair.get(side).attr(NetworkDispatcher.FML_DISPATCHER).set(target); channelPair.get(side).writeOutbound(push); ArrayList<FMLProxyPacket> list = new ArrayList<FMLProxyPacket>(); for (Object o : channelPair.get(side).outboundMessages()) { list.add((FMLProxyPacket) o); } channelPair.get(side).outboundMessages().clear(); return list; } public static void enhanceStatusQuery(JsonObject jsonobject) { JsonObject fmlData = new JsonObject(); fmlData.addProperty("type", "FML"); JsonArray modList = new JsonArray(); for (ModContainer mc : Loader.instance().getActiveModList()) { JsonObject modData = new JsonObject(); modData.addProperty("modid", mc.getModId()); modData.addProperty("version", mc.getVersion()); modList.add(modData); } fmlData.add("modList", modList); jsonobject.add("modinfo", fmlData); } }