private String readCommand(ByteBuffer buffer) throws CharacterCodingException {
    commandBuffer.clear();
    asciiDecoder.get().decode(buffer, commandBuffer, false);
    commandBuffer.flip();
    return trimCommand(commandBuffer.toString()).toUpperCase();
  }
Reads the first line from the request and interprets the {@link Command} from the memcached
client
geode-memcached/src/main/java/org/apache/geode/internal/memcached/RequestReader.java