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nodemaker: teach nodemaker how to create MDMF mutable files

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This commit is contained in:
Kevan Carstensen 2011-08-01 18:42:58 -07:00
parent 126d1ad010
commit 4c48e2e1b6
1 changed files with 16 additions and 5 deletions
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21
src/allmydata/nodemaker.py
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@ -1,10 +1,12 @@
import weakref import weakref
from zope.interface import implements from zope.interface import implements
from allmydata.interfaces import INodeMaker from allmydata.util.assertutil import precondition
from allmydata.interfaces import INodeMaker, SDMF_VERSION
from allmydata.immutable.literal import LiteralFileNode from allmydata.immutable.literal import LiteralFileNode
from allmydata.immutable.filenode import ImmutableFileNode, CiphertextFileNode from allmydata.immutable.filenode import ImmutableFileNode, CiphertextFileNode
from allmydata.immutable.upload import Data from allmydata.immutable.upload import Data
from allmydata.mutable.filenode import MutableFileNode from allmydata.mutable.filenode import MutableFileNode
from allmydata.mutable.publish import MutableData
from allmydata.dirnode import DirectoryNode, pack_children from allmydata.dirnode import DirectoryNode, pack_children
from allmydata.unknown import UnknownNode from allmydata.unknown import UnknownNode
from allmydata import uri from allmydata import uri
@ -87,17 +89,26 @@ class NodeMaker:
return self._create_dirnode(filenode) return self._create_dirnode(filenode)
return None return None
def create_mutable_file(self, contents=None, keysize=None): def create_mutable_file(self, contents=None, keysize=None,
version=SDMF_VERSION):
n = MutableFileNode(self.storage_broker, self.secret_holder, n = MutableFileNode(self.storage_broker, self.secret_holder,
self.default_encoding_parameters, self.history) self.default_encoding_parameters, self.history)
d = self.key_generator.generate(keysize) d = self.key_generator.generate(keysize)
d.addCallback(n.create_with_keys, contents) d.addCallback(n.create_with_keys, contents, version=version)
d.addCallback(lambda res: n) d.addCallback(lambda res: n)
return d return d
def create_new_mutable_directory(self, initial_children={}): def create_new_mutable_directory(self, initial_children={},
version=SDMF_VERSION):
# initial_children must have metadata (i.e. {} instead of None)
for (name, (node, metadata)) in initial_children.iteritems():
precondition(isinstance(metadata, dict),
"create_new_mutable_directory requires metadata to be a dict, not None", metadata)
node.raise_error()
d = self.create_mutable_file(lambda n: d = self.create_mutable_file(lambda n:
pack_children(initial_children, n.get_writekey())) MutableData(pack_children(initial_children,
n.get_writekey())),
version=version)
d.addCallback(self._create_dirnode) d.addCallback(self._create_dirnode)
return d return d