Differences from GigaSpaces pattern

PackRat is based on, but not identical to Binary Serialization Pattern

PackRat differs in following:

1. In PackRat architecture BinaryFormatEntry is represented by 3 separate classes
   • POJO class containing application data and acting as domain class
   • Data Transfer Object (DTO): Partially serialized class that contains packed domain data and stored in space.
   • Packer class responsible for transforming POJO object to DTO object.
2. As current version of GigaSpaces XAP doesn't support PbsFormatter, common java I/O was used instead:

   //not supported until GS XAP 6.5
   //PbsFormatter.writeLong(baos, _longFieldA1);
   baos.writeLong(_longFieldA1);

   Next PackRat version will support PbsFormatter as it delivers better compression rate.

3. Currently Externalizable interface is not implemented by DTO object. This will be added in next version.