Compaq Reliable Transaction Router manual Object-Oriented Programming, Partitioned Data Model

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Object-Oriented Programming

Figure 2–2 Partitioned Data Model

Terminals	Frontends (FE)
	FE

Client

FE

Client

FE

Client

FE

Client

Routers (TR)	Backends (BE) Database (DB)

	BE
	Server

	BE	DB
	BE
	Server	DB
		DB
TR		DB
	BE	DB
	BE
	Server
TR

ZKO-GS012-99AI

2–6Architectural Concepts

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Contents Reliable Transaction Router Getting Started Page Contents Reliability Features Figures Page Purpose of this Document PrefaceDocument Structure Related Documentation For all usersReading Path Readers CommentsIf V2 to System Manager Application Programmer= Tutorial Introduction Reliable Transaction RouterRTR Continuous Computing Concepts RTR Continuous Computing ConceptsRTR Terminology RTR TerminologyClient Symbol Server Symbol Roles Symbols Components in the RTR Environment Nontransactional messaging Transaction ID Controller Application Presentation Database ServerBusiness Logic Odbc Model PC Browser RTR FrontendBrowser Journal11 RTR Deployed on Three Nodes 12 Standby Server Conﬁguration 13 Transactional Shadowing Conﬁguration RTR Server Types RTR Server TypesStandby server Standby in a cluster 15 Standby Servers 16 Shadow Servers 17 Concurrent Servers Server1 Server2 Server3 Server4Transaction Partition a19 Bank Partitioning Example Standby Server Conﬁgurations Anonymous clients Tunnel RTR Networking Capabilities RTR Networking CapabilitiesPage Architectural Concepts Three-Layer ModelThree-Layer Model Three Layer ModelRTR Facilities Bridge the Gap BroadcastsFlexibility and Growth RTR Facilities Bridge the GapTransaction Integrity Flexibility and GrowthObject-Oriented Programming Partitioned Data ModelPartitioned Data Model Object-Oriented Programming Partitioned Data ModelObjects Functional and Object-Oriented Programming ComparedMessages Class Relationships Example 2-1 Objects-Deﬁned SamplePolymorphism Object Implementation Beneﬁts XA Support XA SupportReliability Features ServersRecovery Scenarios Failover and RecoveryFailover and Recovery Backend Recovery Router Recovery Frontend Recovery Recovery ScenariosPage RTR Interfaces RTR Management Station RTR Management Station RTR Create Facility DESIGN/ALLROLES=NODEA RTR RTRRECEIVEMESSAGE/TIME=0 RTR RTRSTARTTX/CHAN=C Application Programming Interfaces InterfaceApplication Programming Interfaces RTR Browser InterfaceRTR C Example of an open channel call in an RTR client program RTR Environment RTR System Management EnvironmentRTR System Management Environment RtrcomservRTR System Management Environment Management Station Running Browser SoftwareMonitoring RTR RTR Runtime Environment Client Application RTR Runtime EnvironmentOptional External Applet Not Running Whats Next? Whats Next?Page Glossary Branch BroadcastCallout server ChannelCommon classes Concurrent serverData marshalling Data objectFault tolerant EndianEvent Event drivenFrontend InquorateJournal Key rangeMessage Message handlerMultichannel MultithreadedPrimary ProcessProperties Property classesRollback RouterRTR conﬁguration RTR environmentShadow StandbyTransaction Transaction controllerTransactional message Two-phase commitTransactional shadowing Index Index-1Index-2