refactoring: ProtocolDecoder

protocol-new/src/main/java/mc/protocol/codec/ProtocolDecoder.java

@@ -0,0 +1,44 @@
+package mc.protocol.codec;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.ByteToMessageDecoder;
+import lombok.extern.slf4j.Slf4j;
+import mc.protocol.NettyAttributes;
+import mc.protocol.State;
+import mc.protocol.io.NetByteBuf;
+import mc.protocol.packets.ClientSidePacket;
+import mc.protocol.pool.PacketObjectPool;
+
+import java.util.List;
+
+@Slf4j
+public class ProtocolDecoder extends ByteToMessageDecoder {
+
+	@Override
+	protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
+		State state = ctx.channel().attr(NettyAttributes.STATE).get();
+		NetByteBuf netByteBuf = new NetByteBuf(in);
+
+		int packetId = netByteBuf.readVarInt();
+		Class<? extends ClientSidePacket> packetClass = state.getClientSidePacketById(packetId);
+		if (packetClass == null) {
+			log.warn("Unknown packet: State {} ; Id 0x{}", state, packetIdAsHexcode(packetId));
+			netByteBuf.skipBytes(netByteBuf.readableBytes());
+		} else {
+			ClientSidePacket packet = PacketObjectPool.getInstance().getPool(packetClass).borrowObject();
+			packet.readSelf(netByteBuf);
+			if (log.isDebugEnabled()) {
+				log.debug("IN: {}:{}", state, packet);
+			}
+			out.add(packet);
+		}
+	}
+
+	private static String packetIdAsHexcode(int packetId) {
+		String hexPacketId = Integer.toHexString(packetId).toUpperCase();
+		if (hexPacketId.length() == 1) hexPacketId = "0" + hexPacketId;
+
+		return hexPacketId;
+	}
+}

protocol-new/src/main/java/mc/protocol/pool/PacketObjectPool.java

@@ -0,0 +1,14 @@
+package mc.protocol.pool;
+
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import mc.protocol.packets.ClientSidePacket;
+import mc.utils.pool.WideClassObjectPool;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class PacketObjectPool extends WideClassObjectPool<ClientSidePacket> {
+
+	@Getter
+	private static final PacketObjectPool instance = new PacketObjectPool();
+}