This glossary describes terms used in this book and words used with other
than their everyday meaning. In some cases, a definition might not be
the only one applicable to a term, but it gives the particular sense in which
the word is used in this book.
If you do not find the term you are looking for, see the index or the
IBM Dictionary of Computing, New York:. McGraw-Hill,
1994.
- application programming interface (API)
- An application programming interface consists of the functions and
variables that programmers are allowed to use in their applications.
- asynchronous messaging
- A method of communication between programs in which programs place
messages on message queues. With asynchronous messaging, the sending
program proceeds with its own processing without waiting for a reply to its
message. Contrast with synchronous messaging.
- authenticator
- A program that verifies the senders and receivers of messages.
- bridge
- A WebSphere MQ Everyplace object that allows messages to flow between
WebSphere MQ Everyplace and other messaging systems, including WebSphere
MQ.
- channel
- See dynamic channel and MQI channel.
- channel manager
- A WebSphere MQ Everyplace object that supports logical multiple concurrent
communication pipes between end points.
- class
- An encapsulated collection of data and methods to operate on the
data. A class may be instantiated to produce an object that is an
instance of the class.
- client
- In WebSphere MQ, a client is a run-time component that provides access to
queuing services on a server for local user applications.
- compressor
- A program that compacts a message to reduce the volume of data to be
transmitted.
- connection
- Links WebSphere MQ Everyplace devices and transfers synchronous and
asynchronous messages and responses in a bidirectional manner.
- cryptor
- A program that encrypts a message to provide security during
transmission.
- encapsulation
- An object-oriented programming technique that makes an object's data
private or protected and allows programmers to access and manipulate the data
only through method calls.
- gateway
- In WebSphere MQ Everyplace, a computer running the WebSphere MQ Everyplace
code including a channel manager.
- Hypertext Markup Language (HTML)
- A language used to define information that is to be displayed on the World
Wide Web.
- instance
- An object. When a class is instantiated to produce an object, the
object is an instance of the class.
- interface
- A class that contains only abstract methods and no instance
variables. An interface provides a common set of methods that can be
implemented by subclasses of a number of different classes.
- Internet
- A cooperative public network of shared information. Physically, the
Internet uses a subset of the total resources of all the currently existing
public telecommunication networks. Technically, what distinguishes the
Internet as a cooperative public network is its use of a set of protocols
called TCP/IP (Transport Control Protocol/Internet Protocol).
- Java Development Kit (JDK)
- A package of software distributed by Sun Microsystems for Java
developers. It includes the Java interpreter, Java classes and Java
development tools: compiler, debugger, disassembler, appletviewer, stub
file generator, and documentation generator.
- Java Naming and Directory Service (JNDI)
- An API specified in the Java programming language. It provides
naming and directory functions to applications written in the Java programming
language.
- Lightweight Directory Access Protocol (LDAP)
- A client/server protocol for accessing a directory service.
- message
- In message queuing applications, a communication sent between
programs.
- message queue
- See queue.
- message queuing
- A programming technique in which each program within an application
communicates with the other programs by putting messages on queues.
- method
- The object-oriented programming term for a function or procedure.
- MQI channel
- Connects a WebSphere MQ client to a queue manager on a server system and
transfers MQI calls and responses in a bidirectional manner.
- WebSphere MQ
- WebSphere MQ is a family of IBM licensed programs that provide message
queuing services.
- object
- (1) In Java, an object is an instance of a class. A class models a
group of things; an object models a particular member of that
group. (2) In WebSphere MQ, an object is a queue manager, a queue, or a
channel.
- package
- A package in Java is a way of giving a piece of Java code access to a
specific set of classes. Java code that is part of a particular package
has access to all the classes in the package and to all non-private methods
and fields in the classes.
- personal digital aistant (PDA)
- A pocket sized personal computer.
- private
- A private field is not visible outside its own class.
- protected
- A protected field is visible only within its own class, within a subclass,
or within packages of which the class is a part.
- public
- A public class or interface is visible everywhere. A public method
or variable is visible everywhere that its class is visible.
- queue
- A queue is a WebSphere MQ object. Message queueing applications can
put messages on, and get messages from, a queue.
- queue manager
- A queue manager is a system program that provides message queuing services
to applications.
- registry
- Stores the queue manager configuration information.
- server
- (1) An WebSphere MQ Everyplace server is a device that has a WebSphere MQ
Everyplace channel manager configured. (2) A WebSphere MQ server is a
queue manager that provides message queuing services to client applications
running on a remote workstation. (3) More generally, a server is a
program that responds to requests for information in the particular
two-program information flow model of client/server. (3) The computer
on which a server program runs.
- servlet
- A Java program which is designed to run only on a Web server.
- subclass
- A subclass is a class that extends another. The subclass inherits
the public and protected methods and variables of its superclass.
- superclass
- A superclass is a class that is extended by some other class. The
superclass's public and protected methods and variables are available to
the subclass.
- synchronous messaging
- A method of communicating between programs in which programs place
messages on message queues. With synchronous messaging, the sending
program waits for a reply to its message before resuming its own
processing. Contrast with asynchronous messaging.
- Transmission Control Protocol/Internet Protocol (TCP/IP)
- A set of communication protocols that support peer-to-peer connectivity
functions for both local and wide area networks.
- transformer
- A piece of code that performs data or message reformatting.
- Web
- See World Wide Web.
- Web browser
- A program that formats and displays information that is distributed on the
World Wide Web.
- World Wide Web (Web)
- The World Wide Web is an Internet service, based on a common set of
protocols, which allows a particularly configured server computer to
distribute documents across the Internet in a standard way.
© IBM Corporation 2002. All Rights Reserved