fixing error with framing where it (#620)

Signed-off-by: Robert Roeser <rroeserr@gmail.com>

Author: robertroeser

rsocket-core/src/main/java/io/rsocket/frame/DataAndMetadataFlyweight.java

@@ -3,7 +3,6 @@
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.ByteBufAllocator;
 import io.netty.buffer.Unpooled;
-import io.rsocket.buffer.TupleByteBuf;
 
 class DataAndMetadataFlyweight {
   public static final int FRAME_LENGTH_MASK = 0xFFFFFF;
@@ -33,20 +32,19 @@ private static int decodeLength(final ByteBuf byteBuf) {
 
   static ByteBuf encodeOnlyMetadata(
       ByteBufAllocator allocator, final ByteBuf header, ByteBuf metadata) {
-    return TupleByteBuf.of(allocator, header, metadata);
+    return allocator.compositeBuffer().addComponents(true, header, metadata);
   }
 
   static ByteBuf encodeOnlyData(ByteBufAllocator allocator, final ByteBuf header, ByteBuf data) {
-    return TupleByteBuf.of(allocator, header, data);
+    return allocator.compositeBuffer().addComponents(true, header, data);
   }
 
   static ByteBuf encode(
       ByteBufAllocator allocator, final ByteBuf header, ByteBuf metadata, ByteBuf data) {
 
     int length = metadata.readableBytes();
     encodeLength(header, length);
-
-    return TupleByteBuf.of(allocator, header, metadata, data);
+    return allocator.compositeBuffer().addComponents(true, header, metadata, data);
   }
 
   static ByteBuf metadataWithoutMarking(ByteBuf byteBuf, boolean hasMetadata) {

rsocket-core/src/main/java/io/rsocket/frame/FrameLengthFlyweight.java

@@ -2,7 +2,6 @@
 
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.ByteBufAllocator;
-import io.rsocket.buffer.TupleByteBuf;
 
 /**
  * Some transports like TCP aren't framed, and require a length. This is used by DuplexConnections
@@ -35,7 +34,7 @@ private static int decodeLength(final ByteBuf byteBuf) {
   public static ByteBuf encode(ByteBufAllocator allocator, int length, ByteBuf frame) {
     ByteBuf buffer = allocator.buffer();
     encodeLength(buffer, length);
-    return TupleByteBuf.of(allocator, buffer, frame);
+    return allocator.compositeBuffer().addComponents(true, buffer, frame);
   }
 
   public static int length(ByteBuf byteBuf) {