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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Path-based references for PB, and other reference-based protocols.
Maintainer: Glyph Lefkowitz
"""
from copy import copy
import os, warnings
from twisted.python import log
from twisted.spread.flavors import Referenceable, Viewable
warnings.warn(
"twisted.spread.refpath is deprecated since Twisted 9.0.",
category=DeprecationWarning, stacklevel=2)
### "Server"-side objects
class PathReferenceContext:
def __init__(self, path, root):
self.metadata = {}
self.path = path
self.root = root
def __setitem__(self, key, item):
self.metadata[key] = item
def __getitem__(self, key):
return self.metadata[key]
def getObject(self):
o = self.root
for p in self.path:
o = o.getChild(p, self)
return o
class PathReference:
def __init__(self):
self.children = {}
def getChild(self, child, ctx):
return self.children[child]
class PathReferenceDirectory(Referenceable):
def __init__(self, root, prefix="remote"):
self.root = root
self.prefix = prefix
def remote_callPath(self, path, name, *args, **kw):
ctx = PathReferenceContext(path, self)
obj = ctx.getObject()
return apply(getattr(obj, "%s_%s" % (self.prefix, name)), args, kw)
class PathReferenceContextDirectory(Referenceable):
def __init__(self, root, prefix="remote"):
self.root = root
self.prefix = prefix
def remote_callPath(self, path, name, *args, **kw):
ctx = PathReferenceContext(path, self)
obj = ctx.getObject()
return apply(getattr(obj, "%s_%s" % (self.prefix, name)),
(ctx,)+args, kw)
class PathViewDirectory(Viewable):
def __init__(self, root, prefix="view"):
self.root = root
self.prefix = prefix
def view_callPath(self, perspective, path, name, *args, **kw):
ctx = PathReferenceContext(path, self)
obj = ctx.getObject()
return apply(getattr(obj, "%s_%s" % (self.prefix, name)),
(perspective,)+args, kw)
class PathViewContextDirectory(Viewable):
def __init__(self, root, prefix="view"):
self.root = root
self.prefix = prefix
def view_callPath(self, perspective, path, name, *args, **kw):
ctx = PathReferenceContext(path, self)
obj = ctx.getObject()
return apply(getattr(obj, "%s_%s" % (self.prefix, name)),
(perspective,ctx)+args, kw)
### "Client"-side objects
class RemotePathReference:
def __init__(self, ref, path):
self.ref = ref
self.path = path
def callRemote(self, name, *args, **kw):
apply(self.ref.callRemote,
("callPath", self.path, name)+args, kw)
