Compaq Reliable Transaction Router manual Message handler, Multichannel, Multithreaded, Node

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message

A logical grouping of information transmitted between software components, typically over network links.

message handler

A C++ API-derived object used in event-driven processing that processes messages.

multichannel

An application that uses more than one channel. A server is usually multichannel.

multithreaded

An application that uses more than one thread of execution in a single process.

MS DTC

Microsoft DTC; see DTC.

node

A physical system.

nontransactional message

A message containing data that does not contain any part of a transaction such as a broadcast or diagnostic message. See transactional message.

partition

RTR transactions can be sent to a speciﬁc database segment or partition. This is data content routing and handled by RTR when so programmed in the application and speciﬁed by the system administrator. A partition can be in one of three states: primary, standby, and shadow.

partition properties

Information about the attributes of a partition.

polling

A processing method where the application polls for incoming messages.

Glossary–6

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Contents Reliable Transaction Router Getting Started Page Contents Reliability Features Figures Page Preface Purpose of this DocumentDocument Structure Related Documentation For all usersReading Path Readers CommentsSystem Manager Application Programmer If V2 to= 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 Database Server Application PresentationBusiness 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 GrowthPartitioned Data Model Object-Oriented ProgrammingPartitioned 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 ServersFailover and Recovery Recovery ScenariosFailover 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 RTR Runtime Environment Client ApplicationOptional 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 controllerTwo-phase commit Transactional messageTransactional shadowing Index Index-1Index-2