Rapid Development of Custom Software Architecture Design ...
Rapid Development of Custom Software Architecture Design ...
Rapid Development of Custom Software Architecture Design ...
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$SSURDFK7KLFN&OLHQW7KLQ6HUYHU7KLQ&OLHQW7KLFN6HUYHU7KUHH7LHU'LDJUDPClientAppLogic«RPC'sClientAppLogicClient«RPC'sAppLogicClientClienWAppLogic««ClientAppLogicDatastoreServerDatastoreServer«DatastoreDatastore'HVFULSWLRQEmbed application logicin client components.Clients decide what datato retrieve from servers.Servers simply retrieverequested data.Embed application logic inserver components.Clients only send simplerequests and displayresults. Server aggregatesand processes data,returning processedresults.Add a third layer <strong>of</strong> abstractionand a new type <strong>of</strong>component, App Logic,that embodies the applicationlogic and retrievesand aggregates data fromthe datastore(s).%HQHILWV• Simpler datastore• Reduced serverprocessing load• Simpler clients• Updates to applicationlogic made at server sidepropagate to all clientseasily and quickly• Clean separation <strong>of</strong>componentresponsibilities• Lightweight clients• Impact <strong>of</strong> modificationslocalized.• Easy propagation <strong>of</strong>component modifications'UDZEDFNV• Large, complex clients• Updates to applicationlogic in installed base <strong>of</strong>clients is difficult• Dependencies betweenclient and server• Data storage andrepresentation is tightlytied to application dataprocessing• Potentially high serverprocessing requirements• Potential performance hitdue to extra layer <strong>of</strong>indirection• Additional potentialpoints <strong>of</strong> failure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