package cpw.mods.fml.common.network;
import io.netty.channel.ChannelHandler;
import io.netty.channel.embedded.EmbeddedChannel;
import java.util.Map.Entry;
import net.minecraft.network.Packet;
import cpw.mods.fml.common.Loader;
import cpw.mods.fml.common.ModContainer;
import cpw.mods.fml.common.network.FMLOutboundHandler.OutboundTarget;
import cpw.mods.fml.common.network.internal.FMLProxyPacket;
import cpw.mods.fml.relauncher.Side;
/**
* Utility wrapper around {@link EmbeddedChannel}. Provides some convenience methods
* associated with the specific needs of FML network handling.
*
* @author cpw
*
*/
public class FMLEmbeddedChannel extends EmbeddedChannel {
public FMLEmbeddedChannel(String channelName, Side source, ChannelHandler... handlers)
{
this(Loader.instance().activeModContainer(), channelName, source, handlers);
}
public FMLEmbeddedChannel(ModContainer container, String channelName, Side source, ChannelHandler... handlers)
{
super(handlers);
this.attr(NetworkRegistry.FML_CHANNEL).set(channelName);
this.attr(NetworkRegistry.CHANNEL_SOURCE).set(source);
this.attr(NetworkRegistry.MOD_CONTAINER).setIfAbsent(container);
this.pipeline().addFirst("fml:outbound",new FMLOutboundHandler());
}
/**
* Utility method to generate a regular packet from a custom packet. Basically, it writes the packet through the
* outbound side which should have a message to message codec present (such as {@link FMLIndexedMessageToMessageCodec},
* transforming from mod packets to standard {@link FMLProxyPacket}s.
*
* This is mostly useful in cases where vanilla expects a packet, such as the TileEntity getDescriptionPacket.
*
* @param object The inbound packet
* @return A Packet suitable for passing to vanilla network code.
*/
public Packet generatePacketFrom(Object object)
{
OutboundTarget outboundTarget = attr(FMLOutboundHandler.FML_MESSAGETARGET).getAndSet(OutboundTarget.NOWHERE);
writeOutbound(object);
Packet pkt = (Packet) outboundMessages().poll();
attr(FMLOutboundHandler.FML_MESSAGETARGET).set(outboundTarget);
return pkt;
}
public String findChannelHandlerNameForType(Class<? extends ChannelHandler> type)
{
String targetName = null;
for (Entry<String, ChannelHandler> entry : pipeline())
{
if (type.isInstance(entry.getValue()))
{
targetName = entry.getKey();
break;
}
}
return targetName;
}
}