Example Data and Class Definitions

This extended example is used throughout the section to show C++ and corresponding Java class definitions and sample data for the example portfolios region. The region’s keys are the portfolio ID.

User-defined data types must implement the Serializable interface on the client side, while corresponding Java classes must implement the DataSerializable interface. The C++ objects for the client must correspond to the Java objects for the GemFire cache server. This means that an object on one side should deserialize correctly at the other side.

Sample C++ class definition

class Portfolio : public Serializable {
   int ID;
   char * type;
   char * status;
   Map<Position> positions;
}
class Position : public Serializable {
   char * secId;
   double mktValue;
   double qty;
}

Corresponding Java class definition

class Portfolio implements DataSerializable {
    int ID;
    String type;
    String status;
    Map positions;
}
class Position implements DataSerializable {
    String secId;
    double mktValue;
    double qty;
}

The following table lists the sample data in the portfolios region.


id	type	Statusted	Position: secID	Position: mktValue	Position: qty
111	xyz	active	xxx	27.34	1000.00
			xxy	26.31	1200.00
			xxz	24.30	1500.00
222	xyz	active	yyy	18.29	5000.00
333	abc	active	aaa	24.30	10.00
333	abc	active	aab	23.10	15.00
444	abc	inactive	bbb	50.41	100.00
444	abc	inactive	bbc	55.00	90.00

Because the client cache waits during transaction execution, and client regions are not distributed, the only activities that interact with a client transaction are those that occur on the server.