TS/MP 2.5 Pathsend and Server Programming Manual

client and handle database input and output functions. Interprocess communication (IPC) messages
transfer data between client and server.
COBOL85 The HP compiler and run-time support for the American National Standards Institute (ANSI)
programming language COBOL, X.3.23-1985. Pathway server processes are often written in
this language.
cold start The operation that starts a PATHMON environment for the first time. This operation either creates
a new PATHMON configuration file (PATHCTL file) that defines the PATHMON environment and
its objects or overwrites an existing PATHMON configuration file (which effectively creates a new
PATHMON environment). See also cool start.
command file A file that serves as a source for command input. For example, users can prepare a command
file containing PATHCOM or SCREEN COBOL Utility Program (SCUP) commands. They can then
cause the commands in the file to be executed by issuing the PATHCOM or SCUP OBEY command
and specifying the name of the file. Alternatively, they can specify this file as the input file when
they execute PATHCOM or SCUP.
command
interpreter
An interactive program used to run programs, check system status, create and delete disk files,
and alter hardware states.
command terminal A terminal at which a system manager or operator enters commands for configuration and
management, such as the PATHCOM commands that configure and manage a PATHMON
environment. See also application terminal.
complex
instruction-set
computing (CISC)
A processor architecture based on a large instruction set, characterized by numerous addressing
modes, multicycle machine instructions, and many special-purpose instructions. See also reduced
instruction-set computing (RISC).
configuration The definition or alteration of characteristics of an object. See also object.
configured TERM
object
A TERM object that is explicitly configured with an ADD TERM command. Such a TERM object
exists until it is explicitly deleted. Names of configured TERM objects begin with a letter. See also
temporary TERM object and TERM object.
consistency. See database consistency.
context Information required by a server to process the current request in an exchange of multiple request
and reply messages: for example, identification of the last item processed. See also context-free
server and terminal context.
context sensitivity The ability of a requestor to exchange a series of multiple request and reply messages (that is, a
dialog) with a particular server process. See also contextsensitive server and dialog.
context-free server A server that does not retain any information about the processing of previous requests. A
context-free server accepts a single message from a requestor, performs the requested tasks, and
issues a single reply to respond to the requestor. After the reply message is issued, the server
retains no information, or context, that can be used in subsequent requests. In general, context-free
servers are relatively simple to program and can be restarted quickly, but they require the requestor
to pass context information to the server on each request. Servers handling requests from Pathsend
requestors can be either context-free or context-sensitive, but servers servicing requests from
SCREEN COBOL requestors must be context-free. A contextfree server is analogous to a NonStop
Tuxedo request and response server. NonStop subsystems are context-free servers; therefore,
management applications using the Subsystem Programmatic Interface (SPI) to communicate with
NonStop subsystems must pass back context information in continuation requests. See also context,
context-sensitive server, and Subsystem Programmatic Interface (SPI).
context-sensitive
server
A server that retains information about the processing of previous requests. A context-sensitive
Pathway server can engage in a multiplemessage communication, or dialog, with a requestor.
Because context-sensitive servers must maintain message context for the dialog, they are more
complex to program than context-free servers. They typically have longer restart times because
they must recover the requestor context. See also context and context-free server.
conversation See dialog.
conversational
mode
A terminal operating mode in which data is read from the terminal and displayed on the
terminal screen one line at a time. See also block mode and intelligent mode.
1.
2. The mode of communication that enables an ongoing dialog between a client (or requestor)
and a server. Data is sent and received in an iterating fashion without return to the transaction
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