Implementing Filter Objects

Since filter objects are full-fledged CORBA objects, implementing a filter object is similar to implementing any other CORBA object. Each of the filter method is implemented keeping in mind the server method it is going to up-filter or down-filter.

Figure 4: Sample Configuration File

/* Filter section with unique key filter */ 

[ filter ] 

{  

[ FilterRepo ] /* contains filter IMR repoid */ 

{  

/* Filter id and Tag */ 

IDL:AccountFilter:1.0   foobar  

}  

[ Enable ]  /* contains filter method to be enabled. */ 

{  

balanceUp 

balanceDown  

} 

[ Mappings ]  /* contains up & down method mappings. */ 

{  

Up balance balanceUp 

Down balance balanceDown  

}  

} 

[ client ]  /* Client section with unique key 'client' */ 

{  

/* contains client and filter ids to be plugged. */ 

[ Plug ] 

{  

[ ClientRepo ]  /* contains client IMR repoids */ 

{  

IDL:Account:1.0 foobar  

} 

[ FilterRepo ]  /* contains filter IMR repoids */ 

{  

IDL:AccountFilter:1.0   foobar  

}  

}  

}