interface FrameCallback {
    @Throws(IOException::class)
    fun onReadMessage(text: String)

    @Throws(IOException::class)
    fun onReadMessage(bytes: ByteString)

    fun onReadPing(payload: ByteString)

    fun onReadPong(payload: ByteString)

    fun onReadClose(
      code: Int,
      reason: String,
    )
  }

  /**

			return
		}
		defer gr.Close()
		rc, err = file.Open(gr)
		if err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}
	} else {
		rc = io.NopCloser(bytes.NewReader([]byte{}))
	}

	defer rc.Close()

	if err = setObjectHeaders(ctx, w, fileObjInfo, nil, opts); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

 * multiple processes to use the same cache directory at the same time.
 *
 * This cache limits the number of bytes that it will store on the filesystem. When the number of
 * stored bytes exceeds the limit, the cache will remove entries in the background until the limit
 * is satisfied. The limit is not strict: the cache may temporarily exceed it while waiting for

				// concurrently, check for it before we
				// write the filler byte.
				select {
				case err := <-doneCh:
					if err != nil {
						write([]byte{1})
						write([]byte(err.Error()))
					} else {
						write([]byte{0})
					}
					return
				default:
				}

				// Response not ready, write a filler byte.
				write([]byte{32})
				if canWrite {
					w.(http.Flusher).Flush()
				}

    }

    /**
     * 16進数の文字列に変換します。
     *
     * @param bytes
     *            バイトの配列
     * @return 16進数の文字列
     */
    public static String toHex(final byte[] bytes) {
        if (bytes == null) {
            return "";
        }
        final StringBuilder sb = new StringBuilder(bytes.length * 2);
        for (final byte b : bytes) {
            appendHex(sb, b);
        }

				peersLogOnceIf(ctx, err, "event: Encode failed")
				continue
			}
			out <- grid.NewBytesWithCopyOf(buf.Bytes())
		}
	}
}

// TraceHandler sends http trace messages back to peer rest client
func (s *peerRESTServer) TraceHandler(ctx context.Context, payload []byte, _ <-chan []byte, out chan<- []byte) *grid.RemoteErr {
	var traceOpts madmin.ServiceTraceOpts
	err := json.Unmarshal(payload, &traceOpts)
	if err != nil {

        return new JakartaServletDiskFileUpload(fileItemFactory) {
            @Override
            public byte[] getBoundary(final String contentType) { // for security
                final byte[] boundary = super.getBoundary(contentType);
                checkBoundarySize(contentType, boundary);
                return boundary;
            }
        };
    }

    assertEquals(
        InetAddresses.fromLittleEndianByteArray(new byte[] {1, 2, 3, 4}),
        InetAddress.getByAddress(new byte[] {4, 3, 2, 1}));

    assertEquals(
        InetAddresses.fromLittleEndianByteArray(
            new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}),
        InetAddress.getByAddress(
            new byte[] {16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1}));

            0L -> -1L // No more bytes in this part.
            else -> source.read(sink, limit)
          }
        }

        error("unreachable") // TODO(jwilson): fix intersectWith() to return T.
      }

      override fun timeout(): Timeout = timeout
    }

    /**
     * Returns a value in [0..maxByteCount] with the number of bytes that can be read from [source] in

		logger.Fatal(err, "Unable to generate root secret key using KMS")
	}

	accessKey, err := auth.GenerateAccessKey(20, bytes.NewReader(aKey))
	if err != nil {
		logger.Fatal(err, "Unable to generate root access key")
	}
	secretKey, err := auth.GenerateSecretKey(32, bytes.NewReader(sKey))
	if err != nil {
		logger.Fatal(err, "Unable to generate root secret key")
	}