Client Symbol - HP Reliable Transaction Router Getting Started

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An RTR application is user-written software that executes
RTR Application
within the confines of several distributed processes. The RTR
application may perform user interface, business, and server
logic tasks and is written in response to some business need.
An RTR application can be written in one of the supported
languages, C, C++, or Java and includes calls to RTR. RTR
applications are composed of two kinds of actors, client
applications and server applications. An application process
is shown in diagrams as an oval, open for a client application
(see Figure 1–1), filled for a server application (see Figure 1–2).
A client is always a client application, one that initiates
Client
and demarcates a piece of work. In the context of RTR, a client
must run on a node defined to have the frontend role. Clients
typically deal with presentation services, handling forms input,
screens, and so on. A client could connect to a browser running a
browser applet or be a webserver acting as a gateway. In other
contexts, a client can be a physical system, but in RTR and in
this document, physical clients are called frontends or nodes.
You can have more than one instance of a client on a node.
Figure 1–1 Client Symbol
Standby server
Transactional shadowing
RTR journal
Partition
Key range
XA
Client
VM-0819A-AI
RTR Terminology
Introduction 1–5