http://netty.io/netty-all/: Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients. (The Netty Project) 
public class io.netty.example.redis.RedisClientHandler extends io.netty.channel.ChannelDuplexHandler
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.netty.example.redis.RedisClientHandler
  super_class: io.netty.channel.ChannelDuplexHandler
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.example.redis.RedisClientHandler this
         0: .line 39
            aload 0 /* this */
            invokespecial io.netty.channel.ChannelDuplexHandler.<init>:()V
            return
        end local 0 // io.netty.example.redis.RedisClientHandler this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/example/redis/RedisClientHandler;

  public void write(io.netty.channel.ChannelHandlerContext, java.lang.Object, io.netty.channel.ChannelPromise);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;Lio/netty/channel/ChannelPromise;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=10, args_size=4
        start local 0 // io.netty.example.redis.RedisClientHandler this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // java.lang.Object msg
        start local 3 // io.netty.channel.ChannelPromise promise
         0: .line 43
            aload 2 /* msg */
            checkcast java.lang.String
            ldc "\\s+"
            invokevirtual java.lang.String.split:(Ljava/lang/String;)[Ljava/lang/String;
            astore 4 /* commands */
        start local 4 // java.lang.String[] commands
         1: .line 44
            new java.util.ArrayList
            dup
            aload 4 /* commands */
            arraylength
            invokespecial java.util.ArrayList.<init>:(I)V
            astore 5 /* children */
        start local 5 // java.util.List children
         2: .line 45
            aload 4 /* commands */
            dup
            astore 9
            arraylength
            istore 8
            iconst_0
            istore 7
            goto 6
      StackMap locals: io.netty.example.redis.RedisClientHandler io.netty.channel.ChannelHandlerContext java.lang.Object io.netty.channel.ChannelPromise java.lang.String[] java.util.List top int int java.lang.String[]
      StackMap stack:
         3: aload 9
            iload 7
            aaload
            astore 6 /* cmdString */
        start local 6 // java.lang.String cmdString
         4: .line 46
            aload 5 /* children */
            new io.netty.handler.codec.redis.FullBulkStringRedisMessage
            dup
            aload 1 /* ctx */
            invokeinterface io.netty.channel.ChannelHandlerContext.alloc:()Lio/netty/buffer/ByteBufAllocator;
            aload 6 /* cmdString */
            invokestatic io.netty.buffer.ByteBufUtil.writeUtf8:(Lio/netty/buffer/ByteBufAllocator;Ljava/lang/CharSequence;)Lio/netty/buffer/ByteBuf;
            invokespecial io.netty.handler.codec.redis.FullBulkStringRedisMessage.<init>:(Lio/netty/buffer/ByteBuf;)V
            invokeinterface java.util.List.add:(Ljava/lang/Object;)Z
            pop
        end local 6 // java.lang.String cmdString
         5: .line 45
            iinc 7 1
      StackMap locals:
      StackMap stack:
         6: iload 7
            iload 8
            if_icmplt 3
         7: .line 48
            new io.netty.handler.codec.redis.ArrayRedisMessage
            dup
            aload 5 /* children */
            invokespecial io.netty.handler.codec.redis.ArrayRedisMessage.<init>:(Ljava/util/List;)V
            astore 6 /* request */
        start local 6 // io.netty.handler.codec.redis.RedisMessage request
         8: .line 49
            aload 1 /* ctx */
            aload 6 /* request */
            aload 3 /* promise */
            invokeinterface io.netty.channel.ChannelHandlerContext.write:(Ljava/lang/Object;Lio/netty/channel/ChannelPromise;)Lio/netty/channel/ChannelFuture;
            pop
         9: .line 50
            return
        end local 6 // io.netty.handler.codec.redis.RedisMessage request
        end local 5 // java.util.List children
        end local 4 // java.lang.String[] commands
        end local 3 // io.netty.channel.ChannelPromise promise
        end local 2 // java.lang.Object msg
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.example.redis.RedisClientHandler this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0   10     0       this  Lio/netty/example/redis/RedisClientHandler;
            0   10     1        ctx  Lio/netty/channel/ChannelHandlerContext;
            0   10     2        msg  Ljava/lang/Object;
            0   10     3    promise  Lio/netty/channel/ChannelPromise;
            1   10     4   commands  [Ljava/lang/String;
            2   10     5   children  Ljava/util/List<Lio/netty/handler/codec/redis/RedisMessage;>;
            4    5     6  cmdString  Ljava/lang/String;
            8   10     6    request  Lio/netty/handler/codec/redis/RedisMessage;
    MethodParameters:
         Name  Flags
      ctx      
      msg      
      promise  

  public void channelRead(io.netty.channel.ChannelHandlerContext, java.lang.Object);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=4, args_size=3
        start local 0 // io.netty.example.redis.RedisClientHandler this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // java.lang.Object msg
         0: .line 54
            aload 2 /* msg */
            checkcast io.netty.handler.codec.redis.RedisMessage
            astore 3 /* redisMessage */
        start local 3 // io.netty.handler.codec.redis.RedisMessage redisMessage
         1: .line 55
            aload 3 /* redisMessage */
            invokestatic io.netty.example.redis.RedisClientHandler.printAggregatedRedisResponse:(Lio/netty/handler/codec/redis/RedisMessage;)V
         2: .line 56
            aload 3 /* redisMessage */
            invokestatic io.netty.util.ReferenceCountUtil.release:(Ljava/lang/Object;)Z
            pop
         3: .line 57
            return
        end local 3 // io.netty.handler.codec.redis.RedisMessage redisMessage
        end local 2 // java.lang.Object msg
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.example.redis.RedisClientHandler this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    4     0          this  Lio/netty/example/redis/RedisClientHandler;
            0    4     1           ctx  Lio/netty/channel/ChannelHandlerContext;
            0    4     2           msg  Ljava/lang/Object;
            1    4     3  redisMessage  Lio/netty/handler/codec/redis/RedisMessage;
    MethodParameters:
      Name  Flags
      ctx   
      msg   

  public void exceptionCaught(io.netty.channel.ChannelHandlerContext, java.lang.Throwable);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Throwable;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // io.netty.example.redis.RedisClientHandler this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // java.lang.Throwable cause
         0: .line 61
            getstatic java.lang.System.err:Ljava/io/PrintStream;
            ldc "exceptionCaught: "
            invokevirtual java.io.PrintStream.print:(Ljava/lang/String;)V
         1: .line 62
            aload 2 /* cause */
            getstatic java.lang.System.err:Ljava/io/PrintStream;
            invokevirtual java.lang.Throwable.printStackTrace:(Ljava/io/PrintStream;)V
         2: .line 63
            aload 1 /* ctx */
            invokeinterface io.netty.channel.ChannelHandlerContext.close:()Lio/netty/channel/ChannelFuture;
            pop
         3: .line 64
            return
        end local 2 // java.lang.Throwable cause
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.example.redis.RedisClientHandler this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    4     0   this  Lio/netty/example/redis/RedisClientHandler;
            0    4     1    ctx  Lio/netty/channel/ChannelHandlerContext;
            0    4     2  cause  Ljava/lang/Throwable;
    MethodParameters:
       Name  Flags
      ctx    
      cause  

  private static void printAggregatedRedisResponse(io.netty.handler.codec.redis.RedisMessage);
    descriptor: (Lio/netty/handler/codec/redis/RedisMessage;)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=5, locals=3, args_size=1
        start local 0 // io.netty.handler.codec.redis.RedisMessage msg
         0: .line 67
            aload 0 /* msg */
            instanceof io.netty.handler.codec.redis.SimpleStringRedisMessage
            ifeq 3
         1: .line 68
            getstatic java.lang.System.out:Ljava/io/PrintStream;
            aload 0 /* msg */
            checkcast io.netty.handler.codec.redis.SimpleStringRedisMessage
            invokevirtual io.netty.handler.codec.redis.SimpleStringRedisMessage.content:()Ljava/lang/String;
            invokevirtual java.io.PrintStream.println:(Ljava/lang/String;)V
         2: .line 69
            goto 19
      StackMap locals:
      StackMap stack:
         3: aload 0 /* msg */
            instanceof io.netty.handler.codec.redis.ErrorRedisMessage
            ifeq 6
         4: .line 70
            getstatic java.lang.System.out:Ljava/io/PrintStream;
            aload 0 /* msg */
            checkcast io.netty.handler.codec.redis.ErrorRedisMessage
            invokevirtual io.netty.handler.codec.redis.ErrorRedisMessage.content:()Ljava/lang/String;
            invokevirtual java.io.PrintStream.println:(Ljava/lang/String;)V
         5: .line 71
            goto 19
      StackMap locals:
      StackMap stack:
         6: aload 0 /* msg */
            instanceof io.netty.handler.codec.redis.IntegerRedisMessage
            ifeq 9
         7: .line 72
            getstatic java.lang.System.out:Ljava/io/PrintStream;
            aload 0 /* msg */
            checkcast io.netty.handler.codec.redis.IntegerRedisMessage
            invokevirtual io.netty.handler.codec.redis.IntegerRedisMessage.value:()J
            invokevirtual java.io.PrintStream.println:(J)V
         8: .line 73
            goto 19
      StackMap locals:
      StackMap stack:
         9: aload 0 /* msg */
            instanceof io.netty.handler.codec.redis.FullBulkStringRedisMessage
            ifeq 12
        10: .line 74
            getstatic java.lang.System.out:Ljava/io/PrintStream;
            aload 0 /* msg */
            checkcast io.netty.handler.codec.redis.FullBulkStringRedisMessage
            invokestatic io.netty.example.redis.RedisClientHandler.getString:(Lio/netty/handler/codec/redis/FullBulkStringRedisMessage;)Ljava/lang/String;
            invokevirtual java.io.PrintStream.println:(Ljava/lang/String;)V
        11: .line 75
            goto 19
      StackMap locals:
      StackMap stack:
        12: aload 0 /* msg */
            instanceof io.netty.handler.codec.redis.ArrayRedisMessage
            ifeq 18
        13: .line 76
            aload 0 /* msg */
            checkcast io.netty.handler.codec.redis.ArrayRedisMessage
            invokevirtual io.netty.handler.codec.redis.ArrayRedisMessage.children:()Ljava/util/List;
            invokeinterface java.util.List.iterator:()Ljava/util/Iterator;
            astore 2
            goto 16
      StackMap locals: io.netty.handler.codec.redis.RedisMessage top java.util.Iterator
      StackMap stack:
        14: aload 2
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast io.netty.handler.codec.redis.RedisMessage
            astore 1 /* child */
        start local 1 // io.netty.handler.codec.redis.RedisMessage child
        15: .line 77
            aload 1 /* child */
            invokestatic io.netty.example.redis.RedisClientHandler.printAggregatedRedisResponse:(Lio/netty/handler/codec/redis/RedisMessage;)V
        end local 1 // io.netty.handler.codec.redis.RedisMessage child
        16: .line 76
      StackMap locals:
      StackMap stack:
            aload 2
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 14
        17: .line 79
            goto 19
        18: .line 80
      StackMap locals: io.netty.handler.codec.redis.RedisMessage
      StackMap stack:
            new io.netty.handler.codec.CodecException
            dup
            new java.lang.StringBuilder
            dup
            ldc "unknown message type: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* msg */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial io.netty.handler.codec.CodecException.<init>:(Ljava/lang/String;)V
            athrow
        19: .line 82
      StackMap locals:
      StackMap stack:
            return
        end local 0 // io.netty.handler.codec.redis.RedisMessage msg
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0   20     0    msg  Lio/netty/handler/codec/redis/RedisMessage;
           15   16     1  child  Lio/netty/handler/codec/redis/RedisMessage;
    MethodParameters:
      Name  Flags
      msg   

  private static java.lang.String getString(io.netty.handler.codec.redis.FullBulkStringRedisMessage);
    descriptor: (Lio/netty/handler/codec/redis/FullBulkStringRedisMessage;)Ljava/lang/String;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.redis.FullBulkStringRedisMessage msg
         0: .line 85
            aload 0 /* msg */
            invokevirtual io.netty.handler.codec.redis.FullBulkStringRedisMessage.isNull:()Z
            ifeq 2
         1: .line 86
            ldc "(null)"
            areturn
         2: .line 88
      StackMap locals:
      StackMap stack:
            aload 0 /* msg */
            invokevirtual io.netty.handler.codec.redis.FullBulkStringRedisMessage.content:()Lio/netty/buffer/ByteBuf;
            getstatic io.netty.util.CharsetUtil.UTF_8:Ljava/nio/charset/Charset;
            invokevirtual io.netty.buffer.ByteBuf.toString:(Ljava/nio/charset/Charset;)Ljava/lang/String;
            areturn
        end local 0 // io.netty.handler.codec.redis.FullBulkStringRedisMessage msg
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0   msg  Lio/netty/handler/codec/redis/FullBulkStringRedisMessage;
    MethodParameters:
      Name  Flags
      msg   
}
SourceFile: "RedisClientHandler.java"