Twisted Glossary

    adaptee
    An object that has been adapted, also called original. See Adapter.
    Adapter
    An object whose sole purpose is to implement an Interface for another object. See Interfaces and Adapters.
    Application
    A twisted.application.service.Application. There are HOWTOs on creating and manipulating them as a system-administrator, as well as using them in your code.
    Avatar
    (from Twisted Cred) business logic for specific user. For example, in PB these are perspectives, in POP3 these are mailboxes, and so on.
    Banana
    The low-level data marshalling layer of Twisted Spread. See twisted.spread.banana.
    Broker
    A twisted.spread.pb.Broker, the object request broker for Twisted Spread.
    cache
    A way to store data in readily accessible place for later reuse. Caching data is often done because the data is expensive to produce or access. Caching data risks being stale, or out of sync with the original data.
    component
    A special kind of (persistent) Adapter that works with a twisted.python.components.Componentized. See also Interfaces and Adapters.
    Componentized
    A Componentized object is a collection of information, separated into domain-specific or role-specific instances, that all stick together and refer to each other. Each object is an Adapter, which, in the context of Componentized, we call components. See also Interfaces and Adapters.
    conch
    Twisted's SSH implementation.
    Connector
    Object used to interface between client connections and protocols, usually used with a twisted.internet.protocol.ClientFactory to give you control over how a client connection reconnects. See twisted.internet.interfaces.IConnector and Writing Clients.
    Consumer
    An object that consumes data from a Producer. See twisted.internet.interfaces.IConsumer.
    Cred
    Twisted's authentication API, twisted.cred. See Introduction to Twisted Cred and Twisted Cred usage.
    credentials
    A username/password, public key, or some other information used for authentication.
    credential checker
    Where authentication actually happens. See ICredentialsChecker.
    CVSToys
    A nifty set of tools for CVS, available at http://twistedmatrix.com/users/acapnotic/wares/code/CVSToys/.
    Daemon
    A background process that does a job or handles client requests. Daemon is a Unix term; service is the Windows equivalent.
    Deferred
    A instance of twisted.internet.defer.Deferred, an abstraction for handling chains of callbacks and error handlers (errbacks). See the Deferring Execution HOWTO.
    Enterprise
    Twisted's RDBMS support. It contains twisted.enterprise.adbapi for asynchronous access to any standard DB-API 2.0 module, and twisted.enterprise.row, a Relational Object Wrapper. See Introduction to Twisted Enterprise and Twisted Enterprise Row Objects for more details.
    errback
    A callback attached to a Deferred with .addErrback to handle errors.
    Factory
    In general, an object that constructs other objects. In Twisted, a Factory usually refers to a twisted.internet.protocol.Factory, which constructs Protocol instances for incoming or outgoing connections. See Writing Servers and Writing Clients.
    Failure
    Basically, an asynchronous exception that contains traceback information; these are used for passing errors through asynchronous callbacks.
    im
    Abbreviation of (Twisted) Instance Messenger.
    Instance Messenger
    Instance Messenger is a multi-protocol chat program that comes with Twisted. It can communicate via TOC with the AOL servers, via IRC, as well as via PB with Twisted Words. See twisted.words.im.
    Interface
    A class that defines and documents methods that a class conforming to that interface needs to have. A collection of core twisted.internet interfaces can be found in twisted.internet.interfaces. See also Interfaces and Adapters.
    Jelly
    The serialization layer for Twisted Spread, although it can be used seperately from Twisted Spread as well. It is similar in purpose to Python's standard pickle module, but is more network-friendly, and depends on a separate marshaller (Banana, in most cases). See twisted.spread.jelly.
    Lore
    Lore is Twisted's documentation system. The source format is a subset of XHTML, and output formats include HTML and LaTeX.
    Manhole
    A debugging/administration interface to a Twisted application.
    Microdom
    A partial DOM implementation using SUX. It is simple and pythonic, rather than strictly standards-compliant. See twisted.web.microdom.
    Names
    Twisted's DNS server, found in twisted.names.
    Nevow
    The successor to Woven; available from Divmod.
    PB
    Abbreviation of Perspective Broker.
    Perspective Broker
    The high-level object layer of Twisted Spread, implementing semantics for method calling and object copying, caching, and referencing. See twisted.spread.pb.
    Portal
    Glues credential checkers and realms together.
    Producer
    An object that generates data a chunk at a time, usually to be processed by a Consumer. See twisted.internet.interfaces.IProducer.
    Protocol
    In general each network connection has its own Protocol instance to manage connection-specific state. There is a collection of standard protocol implementations in twisted.protocols. See also Writing Servers and Writing Clients.
    PSU
    There is no PSU.
    Reactor
    The core event-loop of a Twisted application. See Reactor Basics.
    Reality
    See Twisted Reality
    realm
    (in Twisted Cred) stores avatars and perhaps general business logic. See IRealm.
    Resource
    A twisted.web.resource.Resource, which are served by Twisted Web. Resources can be as simple as a static file on disk, or they can have dynamically generated content.
    ROW
    Relational Object Wrapper, an object-oriented interface to a relational database. See Twisted Enterprise Row Objects.
    Service
    A twisted.application.service.Service. See Application howto for a description of how they relate to Applications.
    Spread
    Twisted Spread is Twisted's remote-object suite. It consists of three layers: Perspective Broker, Jelly and Banana. See Writing Applications with Perspective Broker.
    SUX
    Small Uncomplicated XML, Twisted's simple XML parser written in pure Python. See twisted.web.sux.
    TAC
    A Twisted Application Configuration is a Python source file, generally with the .tac extension, which defines configuration to make an application runnable using twistd.
    TAP
    Twisted Application Pickle (deprecated), or simply just a Twisted APplication. A serialised application that was created with mktap and runnable by twistd. See Using the Utilities.
    Trial
    twisted.trial, Twisted's unit-testing framework, based on the unittest standard library module. See also Writing tests for Twisted code.
    Twisted Matrix Laboratories
    The team behind Twisted. http://twistedmatrix.com/.
    Twisted Reality
    In days of old, the Twisted Reality multiplayer text-based interactive-fiction system was the main focus of Twisted Matrix Labs; Twisted, the general networking framework, grew out of Reality's need for better network functionality. Twisted Reality has been superseded by the Imaginary project.
    usage
    The twisted.python.usage module, a replacement for the standard getopt module for parsing command-lines which is much easier to work with. See Parsing command-lines.
    Words
    Twisted Words is a multi-protocol chat server that uses the Perspective Broker protocol as its native communication style. See twisted.words.
    Woven
    Web Object Visualization Environment. A templating system previously, but no longer, included with Twisted. Woven has largely been superceded by Divmod Nevow.

    Index

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