Packages 
Package Description
com.gemstone.gbj
The GBJ package provides a message forwarding interface between a java client and a GemStone server.
com.gemstone.gbjgci
The GbjGci package provides a low-level interface to the GS/S GBJ product, replacing the original transport layer using the gem broker and object marshalling scheme with code calling the GemBuilder/C Interface (GCI), used in the GBS product.
com.gemstone.gbjstats
The com.gemstone.gbjstats package provides support for accessing shared page cache statistics from a number of sources, including: Customer application code using GbjCacheStats, Java JMX applications using GbjJmxCacheStats and related support classes and files, and VMware's Hyperic monitor using the GbjHypericPluginGenerator and related support files
com.gemstone.tools
The GBJ Tools package provides a graphical user interface to a GemStone server, providing workspace, browser, and inspector windows similar to the GBS product.