Object-Oriented Programming | Compaq Reliable Transaction Router

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

Contents

Reliable Transaction Router Getting Started Page Contents Reliability Features Figures Page Purpose of this Document PrefaceDocument Structure Related Documentation For all users Reading Path Readers Comments If V2 to System Manager Application Programmer= Tutorial Introduction Reliable Transaction Router RTR Continuous Computing Concepts RTR Continuous Computing Concepts RTR Terminology RTR Terminology Client 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 Frontend Browser Journal 11 RTR Deployed on Three Nodes 12 Standby Server Conﬁguration 13 Transactional Shadowing Conﬁguration RTR Server Types RTR Server Types Standby server Standby in a cluster 15 Standby Servers 16 Shadow Servers 17 Concurrent Servers Server1 Server2 Server3 Server4 Transaction Partition a 19 Bank Partitioning Example Standby Server Conﬁgurations Anonymous clients Tunnel RTR Networking Capabilities RTR Networking CapabilitiesPage Architectural Concepts Three-Layer Model Three-Layer Model Three Layer Model RTR Facilities Bridge the Gap BroadcastsFlexibility and Growth RTR Facilities Bridge the Gap Transaction Integrity Flexibility and Growth Object-Oriented Programming Partitioned Data ModelPartitioned Data Model Object-Oriented Programming Partitioned Data Model Objects Functional and Object-Oriented Programming Compared Messages Class Relationships Example 2-1 Objects-Deﬁned Sample Polymorphism Object Implementation Beneﬁts XA Support XA Support Reliability Features Servers Recovery 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 Interface Application Programming Interfaces RTR Browser Interface RTR C Example of an open channel call in an RTR client program RTR Environment RTR System Management Environment RTR System Management Environment Rtrcomserv RTR System Management Environment Management Station Running Browser Software Monitoring RTR RTR Runtime Environment Client Application RTR Runtime EnvironmentOptional External Applet Not Running Whats Next? Whats Next?Page Glossary Branch BroadcastCallout server Channel Common classes Concurrent serverData marshalling Data object Fault tolerant EndianEvent Event driven Frontend InquorateJournal Key range Message Message handlerMultichannel Multithreaded Primary ProcessProperties Property classes Rollback RouterRTR conﬁguration RTR environment Shadow StandbyTransaction Transaction controller Transactional message Two-phase commitTransactional shadowing Index Index-1 Index-2