twisted.persisted.journal.base

Package twisted :: Package persisted :: Package journal :: Module base

Module twisted.persisted.journal.base

Basic classes and interfaces for journal.

Classes
`ICommand`	A serializable command which interacts with a journaled service.
`ICommandLog`	Interface for command log.
`Journal`	All commands to the system get routed through here.
`LoadingService`	Base class for journalled service used with Wrappables.
`MemoryJournal`	Prevayler-like journal that dumps from memory to disk.
`ServiceWrapperCommand`
`Wrappable`	Base class for objects used with LoadingService.
`WrapperCommand`

Function Summary
	`command(methodName, cmdClass)` Wrap a method so it gets turned into command automatically.
	`serviceCommand(methodName, cmdClass)` Wrap methods into commands for a journalled service.

Function Details

command(methodName, cmdClass=<class twisted.persisted.journal.base.WrapperCommand at 0...)

Wrap a method so it gets turned into command automatically.

For use with Wrappables.

Usage:

   | class Foo(Wrappable):
   |     objectType = "foo"
   |     def getUid(self):
   |         return self.id
   |     def _bar(self, x):
   |         return x + 1
   |
   |     bar = command('_bar')

The resulting callable will have signature identical to wrapped function, except that it expects journal as first argument, and returns a Deferred.

serviceCommand(methodName, cmdClass=<class twisted.persisted.journal.base.ServiceWrapperComma...)

Wrap methods into commands for a journalled service.

The resulting callable will have signature identical to wrapped function, except that it expects journal as first argument, and returns a Deferred.

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