Examples with RequestPacketHandler org.spongepowered.api.network.channel.packet.RequestPacketHandler used on opensource projects

Example 1 with RequestPacketHandler

use of org.spongepowered.api.network.channel.packet.RequestPacketHandler in project SpongeCommon by SpongePowered.

the class SpongeBasicPacketChannel method handleLoginRequestPayload.

@Override
protected void handleLoginRequestPayload(final EngineConnection connection, final int transactionId, final ChannelBuf payload) {
    // Is currently always executed on the client,
    // the server always expects a response
    final int opcode = this.readOpcode(payload);
    final SpongePacketBinding<Packet> binding = this.requireBinding(opcode);
    final Packet packet = this.decodePayload(() -> binding.getPacketConstructor().get(), payload);
    // A normal packet binding
    if (binding instanceof SpongeHandlerPacketBinding) {
        final SpongeHandlerPacketBinding<Packet> handlerBinding = (SpongeHandlerPacketBinding<Packet>) binding;
        this.handle(connection, handlerBinding, packet);
        // The server always expects a response
        PacketSender.sendTo(connection, PacketUtil.createLoginPayloadResponse(null, transactionId));
    } else {
        // A transactional packet binding
        final SpongeTransactionalPacketBinding<RequestPacket<Packet>, Packet> transactionalBinding = (SpongeTransactionalPacketBinding) binding;
        final RequestPacketHandler<Packet, Packet, EngineConnection> handler = (RequestPacketHandler<Packet, Packet, EngineConnection>) transactionalBinding.getRequestHandler(connection);
        boolean success = false;
        if (handler != null) {
            final SpongeRequestPacketResponse<Packet> response = new SpongeRequestPacketResponse<Packet>() {

                @Override
                protected void fail0(final ChannelException exception) {
                    final net.minecraft.network.protocol.Packet<?> mcPacket = PacketUtil.createLoginPayloadResponse(null, transactionId);
                    PacketSender.sendTo(connection, mcPacket);
                }

                @Override
                protected void success0(final Packet response) {
                    try {
                        final ChannelBuf responsePayload = SpongeBasicPacketChannel.this.encodeLoginPayload(transactionalBinding.opcode(), response);
                        final net.minecraft.network.protocol.Packet<?> mcPacket = PacketUtil.createLoginPayloadResponse(responsePayload, transactionId);
                        PacketSender.sendTo(connection, mcPacket);
                    } catch (final Throwable ex) {
                        SpongeBasicPacketChannel.this.handleException(connection, new ChannelIOException("Failed to encode response packet", ex), null);
                    }
                }
            };
            try {
                handler.handleRequest(packet, connection, response);
                success = true;
            } catch (final Throwable ex) {
                this.handleException(connection, new ChannelIOException("Failed to handle request packet", ex), null);
            }
        }
        if (!success) {
            final net.minecraft.network.protocol.Packet<?> mcPacket = PacketUtil.createLoginPayloadResponse(null, transactionId);
            PacketSender.sendTo(connection, mcPacket);
        }
    }
}