From: Brian Warner Date: Sat, 20 Jan 2007 21:41:51 +0000 (-0700) Subject: more filetree, it's actually starting to make sense now X-Git-Tag: tahoe_v0.1.0-0-UNSTABLE~344 X-Git-Url: https://git.rkrishnan.org/%5B/%5D%20/uri/reliability?a=commitdiff_plain;h=b61a4ff371c61ad28bf2050d9e87f56928af51c5;p=tahoe-lafs%2Ftahoe-lafs.git more filetree, it's actually starting to make sense now --- diff --git a/src/allmydata/filetree/basenode.py b/src/allmydata/filetree/basenode.py index 3287485b..44ce1d76 100644 --- a/src/allmydata/filetree/basenode.py +++ b/src/allmydata/filetree/basenode.py @@ -6,6 +6,10 @@ class BaseDataNode(object): implements(INode) prefix = None # must be set by subclass + def new(self, data): + self.set_base_data(data) + return self + def get_base_data(self): raise NotImplementedError # must be provided by subclass def set_base_data(self, data): diff --git a/src/allmydata/filetree/directory.py b/src/allmydata/filetree/directory.py index 116a1f98..5360ee97 100644 --- a/src/allmydata/filetree/directory.py +++ b/src/allmydata/filetree/directory.py @@ -1,5 +1,7 @@ from zope.interface import implements +from twisted.internet import defer +from cStringIO import StringIO from allmydata.filetree.interfaces import ( INode, IDirectoryNode, ISubTree, ICHKDirectoryNode, ISSKDirectoryNode, @@ -127,6 +129,7 @@ class _DirectorySubTree(object): # create a new, empty directory self.root = SubTreeNode(self) self.mutable = True # sure, why not + return self def populate_from_node(self, node, parent_is_mutable, node_maker, downloader): # self.populate_from_node must be defined by the subclass (CHK or @@ -182,6 +185,7 @@ class LocalFileSubTreeNode(BaseDataNode): def new(self, filename): self.filename = filename + return self def get_base_data(self): return self.filename @@ -189,9 +193,11 @@ class LocalFileSubTreeNode(BaseDataNode): self.filename = data class LocalFileSubTree(_DirectorySubTree): + node_class = LocalFileSubTreeNode + def new(self, filename): self.filename = filename - _DirectorySubTree.new(self) + return _DirectorySubTree.new(self) def populate_from_node(self, node, parent_is_mutable, node_maker, downloader): self.mutable = True # probably @@ -201,11 +207,25 @@ class LocalFileSubTree(_DirectorySubTree): f.close() return defer.succeed(self._populate_from_data(node_maker)) - def update(self, prepath, work_queue): + def create_node_now(self): + return LocalFileSubTreeNode().new(self.filename) + + def _update(self): f = open(self.filename, "wb") self.serialize_to_file(f) f.close() + def update_now(self, uploader): + self._update() + return self.create_node_now() + + def update(self, work_queue): + # TODO: this may suffer from the same execute-too-early problem as + # redirect.LocalFileRedirection + self._update() + return None + + class CHKDirectorySubTreeNode(BaseDataNode): implements(ICHKDirectoryNode) prefix = "CHKDirectory" @@ -221,9 +241,10 @@ class CHKDirectorySubTreeNode(BaseDataNode): class CHKDirectorySubTree(_DirectorySubTree): # maybe mutable, maybe not + node_class = CHKDirectorySubTreeNode def set_uri(self, uri): - self.old_uri = uri + self.uri = uri def populate_from_node(self, node, parent_is_mutable, node_maker, downloader): assert ICHKDirectoryNode(node) @@ -232,22 +253,37 @@ class CHKDirectorySubTree(_DirectorySubTree): d.addCallback(self._populate_from_data, node_maker) return d - def update(self, prepath, work_queue): + def create_node_now(self): + return CHKDirectorySubTreeNode().new(self.uri) + + def update_now(self, uploader): + f = StringIO() + self.serialize_to_file(f) + data = f.getvalue() + d = uploader.upload_data(data) + def _uploaded(uri): + self.uri = uri + return self.create_node_now() + d.addCallback(_uploaded) + return d + + def update(self, workqueue): # this is the CHK form - f, filename = work_queue.create_tempfile(".chkdir") + old_uri = self.uri + f, filename = workqueue.create_tempfile(".chkdir") self.serialize_to_file(f) f.close() - boxname = work_queue.create_boxname() - # mutation affects our parent - work_queue.add_upload_chk(filename, boxname) - work_queue.add_delete_tempfile(filename) - work_queue.add_retain_uri_from_box(boxname) - work_queue.add_delete_box(boxname) - work_queue.add_addpath(boxname, prepath) - work_queue.add_unlink_uri(self.old_uri) + boxname = workqueue.create_boxname() + workqueue.add_upload_chk(filename, boxname) + workqueue.add_delete_tempfile(filename) + workqueue.add_retain_uri_from_box(boxname) + workqueue.add_delete_box(boxname) + workqueue.add_unlink_uri(old_uri) # TODO: think about how self.old_uri will get updated. I *think* that # this whole instance will get replaced, so it ought to be ok. But # this needs investigation. + + # mutation affects our parent, so we return a boxname for them return boxname @@ -265,14 +301,20 @@ class SSKDirectorySubTreeNode(object): return self.read_cap def get_write_capability(self): return self.write_cap + def set_read_capability(self, read_cap): + self.read_cap = read_cap + def set_write_capability(self, write_cap): + self.write_cap = write_cap class SSKDirectorySubTree(_DirectorySubTree): + node_class = SSKDirectorySubTreeNode def new(self): _DirectorySubTree.new(self) self.version = 0 # TODO: populate + return self def populate_from_node(self, node, parent_is_mutable, node_maker, downloader): node = ISSKDirectoryNode(node) @@ -286,15 +328,36 @@ class SSKDirectorySubTree(_DirectorySubTree): def set_version(self, version): self.version = version - def upload_my_serialized_form(self, work_queue): + def create_node_now(self): + node = SSKDirectorySubTreeNode() + node.set_read_capability(self.read_capability) + node.set_write_capability(self.write_capability) + return node + + def update_now(self, uploader): + if not self.write_capability: + raise RuntimeError("This SSKDirectorySubTree is not mutable") + + f = StringIO() + self.serialize_to_file(f) + data = f.getvalue() + + self.version += 1 + d = uploader.upload_ssk_data(self.write_capability, self.version, data) + d.addCallback(lambda ignored: self.create_node_now()) + return d + + def update(self, workqueue): # this is the SSK form - f, filename = work_queue.create_tempfile(".sskdir") + f, filename = workqueue.create_tempfile(".sskdir") self.serialize_to_file(f) f.close() - # mutation does not affect our parent - work_queue.add_upload_ssk(filename, self.write_capability, - self.version) + + oldversion = self.version self.version = self.version + 1 - work_queue.add_delete_tempfile(filename) - work_queue.add_retain_ssk(self.read_capability) + workqueue.add_upload_ssk(self.write_capability, oldversion, filename) + workqueue.add_delete_tempfile(filename) + workqueue.add_retain_ssk(self.read_capability) + # mutation does not affect our parent + return None diff --git a/src/allmydata/filetree/interfaces.py b/src/allmydata/filetree/interfaces.py index ae7960a2..353b77a0 100644 --- a/src/allmydata/filetree/interfaces.py +++ b/src/allmydata/filetree/interfaces.py @@ -69,6 +69,10 @@ class ISubTree(Interface): a DirectoryNode, or it might be a FileNode. """ + # All ISubTree-providing instances must have a class-level attribute + # named .node_class which references the matching INode-providing class. + # This is used by the Opener to turn nodes into subtrees. + def populate_from_node(node, parent_is_mutable, node_maker, downloader): """Subtrees are created by opener.open() being called with an INode which describes both the kind of subtree to be created and a way to @@ -129,18 +133,62 @@ class ISubTree(Interface): given filehandle (using only .write()). This string should be suitable for uploading to the mesh or storing in a local file.""" - def update(prepath, workqueue): - """Perform and schedule whatever work is necessary to record this - subtree to persistent storage and update the parent at 'prepath' - with a new child specification. + def update_now(uploader): + """Perform whatever work is necessary to record this subtree to + persistent storage. + + This returns an Inode, or a Deferred that fires (with an INode) when + the subtree has been persisted. For directory subtrees, this will cause the subtree to serialize - itself to a file, then add instructions to the workqueue to first - upload this file to the mesh, then add the file's URI to the parent's - subtree. The second instruction will possibly cause recursion, until - some subtree is updated which does not require notifying the parent. + itself to a file, then upload this file to the mesh, then create an + INode-providing instance which describes where the file wound up. For + redirections, this will cause the subtree to modify the redirection's + persistent storage, then return the (unmodified) INode that describes + the redirection. + + This form does not use the workqueue. If the node is shut down before + the Deferred fires, a redirection or SSK subtree might be left in its + previous state, or it might have been updated. """ + def update(workqueue): + """Perform and schedule whatever work is necessary to record this + subtree to persistent storage. + + Returns a boxname or None, synchronously. This function does not + return a Deferred. + + If the parent subtree needs to be modified with the new identity of + this subtree (i.e. for CHKDirectorySubTree instances), this will + return a boxname in which the serialized INode will be placed once + the added workqueue steps have completed. The caller should add + 'addpath' steps to the workqueue using this boxname (which will + eventually cause recursion on other subtrees, until some subtree is + updated which does not require notifying the parent). update() will + add steps to delete the box at the end of the workqueue. + + If the parent subtree does not need to be modified (i.e. for + SSKDirectorySubTree instances, or redirections), this will return + None. + + This is like update_now(), but uses the workqueue to insure + consistency in the face of node shutdowns. Once our intentions have + been recorded in the workqueue, if the node is shut down before the + upload steps have completed, the update will eventually complete the + next time the node is started. + """ + + def create_node_now(): + """FOR TESTING ONLY. Immediately create and return an INode which + describes the current state of this subtree. This does not perform + any upload or persistence work, and thus depends upon any internal + state having been previously set correctly. In general this will + return the correct value for subtrees which have just been created + (and not yet mutated). It will also return the correct value for + subtrees which do not change their identity when they are mutated + (SSKDirectorySubTrees and redirections). + """ #class IMutableSubTree(Interface): # def mutation_affects_parent(): @@ -176,13 +224,12 @@ class ISubTree(Interface): # mesh or in a file.""" class IOpener(Interface): - def open(subtree_specification, parent_is_mutable): - """I can take an ISubTreeSpecification-providing specification of a - subtree and return a Deferred which fires with an instance that - provides ISubTree (and maybe even IMutableSubTree). I probably do - this by performing network IO: reading a file from the mesh, or from - local disk, or asking some central-service node for the current - value.""" + def open(subtree_node, parent_is_mutable, node_maker): + """I can take an INode-providing specification of a subtree and + return a Deferred which fires with an instance that provides ISubTree + (and maybe even IMutableSubTree). I probably do this by performing + network IO: reading a file from the mesh, or from local disk, or + asking some central-service node for the current value.""" class IVirtualDrive(Interface): @@ -196,6 +243,13 @@ class IVirtualDrive(Interface): """Given a string produced by original_node.serialize_node(), produce an equivalent node. """ + def make_subtree_from_node(node, parent_is_mutable): + """Given an INode, create an ISubTree. + + This returns a Deferred that fires (with the new subtree) when the + subtree is ready for use. This uses an IOpener to download the + subtree data, if necessary. + """ # commands to manipulate files diff --git a/src/allmydata/filetree/opener.py b/src/allmydata/filetree/opener.py index 16ef09b8..a536d709 100644 --- a/src/allmydata/filetree/opener.py +++ b/src/allmydata/filetree/opener.py @@ -3,15 +3,16 @@ from zope.interface import implements from twisted.internet import defer from allmydata.filetree import interfaces, directory, redirect #from allmydata.filetree.file import CHKFile, MutableSSKFile, ImmutableSSKFile -#from allmydata.filetree.specification import unserialize_subtree_specification +from allmydata.filetree.interfaces import INode, IDirectoryNode all_openable_subtree_types = [ + directory.LocalFileSubTree, directory.CHKDirectorySubTree, directory.SSKDirectorySubTree, redirect.LocalFileRedirection, redirect.QueenRedirection, - redirect.HTTPRedirection, redirect.QueenOrLocalFileRedirection, + redirect.HTTPRedirection, ] # the Opener can turn an INode (which describes a subtree, like a directory @@ -24,31 +25,36 @@ class Opener(object): self._downloader = downloader self._cache = {} - def _create(self, spec, parent_is_mutable): - assert isinstance(spec, tuple) + def _create(self, node, parent_is_mutable, node_maker): + assert INode(node) for subtree_class in all_openable_subtree_types: - if spec[0] == subtree_class.stype: + if isinstance(node, subtree_class.node_class): subtree = subtree_class() - d = subtree.populate_from_specification(spec, - parent_is_mutable, - self._downloader) + d = subtree.populate_from_node(node, + parent_is_mutable, + node_maker, + self._downloader) return d raise RuntimeError("unable to handle subtree specification '%s'" - % (spec,)) + % (node,)) - def open(self, subtree_specification, parent_is_mutable): - spec = interfaces.ISubTreeSpecification(subtree_specification) + def open(self, node, parent_is_mutable, node_maker): + assert INode(node) + assert not isinstance(node, IDirectoryNode) - # is it in cache? - if spec in self._cache: - return defer.succeed(self._cache[spec]) + # is it in cache? To check this we need to use the node's serialized + # form, since nodes are instances and don't compare by value + node_s = node.serialize_node() + if node_s in self._cache: + return defer.succeed(self._cache[node_s]) - d = defer.maybeDeferred(self._create, spec, parent_is_mutable) - d.addCallback(self._add_to_cache, spec) + d = defer.maybeDeferred(self._create, + node, parent_is_mutable, node_maker) + d.addCallback(self._add_to_cache, node_s) return d - def _add_to_cache(self, subtree, spec): - self._cache[spec] = subtree + def _add_to_cache(self, subtree, node_s): + self._cache[node_s] = subtree # TODO: remove things from the cache eventually return subtree diff --git a/src/allmydata/filetree/redirect.py b/src/allmydata/filetree/redirect.py index 86dd744b..f1217563 100644 --- a/src/allmydata/filetree/redirect.py +++ b/src/allmydata/filetree/redirect.py @@ -12,6 +12,7 @@ class LocalFileRedirectionNode(BaseDataNode): def new(self, handle): self.handle = handle + return self def get_base_data(self): return self.handle @@ -23,6 +24,7 @@ class _BaseRedirection(object): def new(self, child_node): self.child_node = child_node + return self def get_node_for_path(self, path): return ([], self.child_node, path) @@ -34,12 +36,13 @@ class _BaseRedirection(object): self.child_node = node_maker(data) return self + class LocalFileRedirection(_BaseRedirection): - stype = "LocalFileRedirection" + node_class = LocalFileRedirectionNode def new(self, handle, child_node): self.filename = handle - _BaseRedirection.new(self, child_node) + return _BaseRedirection.new(self, child_node) def populate_from_node(self, node, parent_is_mutable, node_maker, downloader): # return a Deferred that fires (with self) when this node is ready @@ -66,20 +69,35 @@ class LocalFileRedirection(_BaseRedirection): def is_mutable(self): return True - def update(self, prepath, workqueue): + def create_node_now(self): + return LocalFileRedirectionNode().new(self.filename) + + def _update(self): f = open(self.filename, "wb") self.serialize_subtree_to_file(f) f.close() + def update_now(self, uploader): + self._update() + return self.create_node_now() + + def update(self, workqueue): + # TODO: this happens too early, before earlier items in the workqueue + # have been executed. This might not be a problem, if our update() + # method isn't actually called until everything earlier has been + # executed anyways. Need to ponder this. + self._update() + return None class QueenRedirectionNode(LocalFileRedirectionNode): prefix = "QueenRedirection" class QueenRedirection(_BaseRedirection): - style = "QueenRedirection" + node_class = QueenRedirectionNode def new(self, handle): self.handle = handle + return self def populate_from_node(self, node, parent_is_mutable, node_maker, downloader): # this specifies a handle for which the Queen maintains a serialized @@ -95,23 +113,38 @@ class QueenRedirection(_BaseRedirection): def is_mutable(self): return True # TODO: maybe, maybe not - def update(self, prepath, workqueue): + def create_node_now(self): + return QueenRedirectionNode().new(self.handle) + + def update_now(self, uploader): f = StringIO() self.serialize_subtree_to_file(f) d = self._queen.callRemote("set_handle", self.handle, f.getvalue()) + def _done(res): + return self.create_node_now() + d.addCallback(_done) return d + def update(self, workqueue): + f, filename = workqueue.create_tempfile(".toqueen") + self.serialize_subtree_to_file(f) + f.close() + workqueue.add_queen_update_handle(self.handle, filename) + workqueue.add_delete_tempfile(filename) + return None + class QueenOrLocalFileRedirectionNode(LocalFileRedirectionNode): prefix = "QueenOrLocalFileRedirection" class QueenOrLocalFileRedirection(_BaseRedirection): - stype = "QueenOrLocalFileRedirection" + node_class = QueenOrLocalFileRedirectionNode def new(self, handle, child_node): self.handle = handle self.version = 0 self.child_node = child_node # TODO + return self def populate_from_node(self, node, parent_is_mutable, node_maker, downloader): # there is a local file which contains a bencoded serialized @@ -146,22 +179,48 @@ class QueenOrLocalFileRedirection(_BaseRedirection): def is_mutable(self): return True - def update(self, prepath, workqueue): + def create_node_now(self): + return QueenOrLocalFileRedirectionNode().new(self.handle) + + def _update(self): self.version += 1 f = StringIO() self.serialize_subtree_to_file(f) version_and_data = bencode.bencode((self.version, f.getvalue())) + return version_and_data + + def update_now(self, uploader): + version_and_data = self._update() f = open(self.filename, "wb") f.write(version_and_data) f.close() + d = self._queen.callRemote("set_handle", self.handle, version_and_data) + def _done(res): + return self.create_node_now() + d.addCallback(_done) return d + def update(self, workqueue): + version_and_data = self._update() + # TODO: this may have the same problem as LocalFileRedirection.update + f = open(self.filename, "wb") + f.write(version_and_data) + f.close() + + f, filename = workqueue.create_tempfile(".toqueen") + self.serialize_subtree_to_file(f) + f.close() + workqueue.add_queen_update_handle(self.handle, filename) + workqueue.add_delete_tempfile(filename) + return None + class HTTPRedirectionNode(BaseDataNode): prefix = "HTTPRedirection" def new(self, url): self.url = url + return self def get_base_data(self): return self.url @@ -169,19 +228,29 @@ class HTTPRedirectionNode(BaseDataNode): self.url = data class HTTPRedirection(_BaseRedirection): - stype = "HTTPRedirection" + node_class = HTTPRedirectionNode + + def new(self, url): + self.url = url def populate_from_node(self, node, parent_is_mutable, node_maker, downloader): # this specifies a URL at which there is a bencoded serialized # subtree specification. + self.url = node.url assert isinstance(node, HTTPRedirectionNode) from twisted.web import client - d = client.getPage(node.url) + d = client.getPage(self.url) d.addCallback(self._populate_from_data, node_maker) return d def is_mutable(self): return False - def update(self, prepath, workqueue): + def create_node_now(self): + return HTTPRedirectionNode().new(self.url) + + def update_now(self, uploader): + raise RuntimeError("HTTPRedirection is not mutable") + + def update(self, workqueue): raise RuntimeError("HTTPRedirection is not mutable") diff --git a/src/allmydata/filetree/specification.py b/src/allmydata/filetree/specification.py deleted file mode 100644 index a09f9b3e..00000000 --- a/src/allmydata/filetree/specification.py +++ /dev/null @@ -1,64 +0,0 @@ - -""" -from zope.interface import implements -from allmydata.filetree.interfaces import ISubTreeSpecification - -class CHKFileSpecification(object): - implements(ISubTreeSpecification) - stype = "CHK-File" - def set_uri(self, uri): - self.uri = uri - def serialize(self): - return (self.stype, self.uri) - def unserialize(self, data): - assert data[0] == self.stype - self.uri = data[1] - -class ImmutableSSKFileSpecification(object): - implements(ISubTreeSpecification) - stype = "SSK-Readonly-File" - def set_read_capability(self, read_cap): - self.read_cap = read_cap - def get_read_capability(self): - return self.read_cap - def serialize(self): - return (self.stype, self.read_cap) - def unserialize(self, data): - assert data[0] == self.stype - self.read_cap = data[1] - -class MutableSSKFileSpecification(ImmutableSSKFileSpecification): - implements(ISubTreeSpecification) - stype = "SSK-ReadWrite-File" - def set_write_capability(self, write_cap): - self.write_cap = write_cap - def get_write_capability(self): - return self.write_cap - def serialize(self): - return (self.stype, self.read_cap, self.write_cap) - def unserialize(self, data): - assert data[0] == self.stype - self.read_cap = data[1] - self.write_cap = data[2] - - - - -def unserialize_subtree_specification(serialized_spec): - assert isinstance(serialized_spec, tuple) - for stype in [CHKDirectorySpecification, - ImmutableSSKDirectorySpecification, - MutableSSKDirectorySpecification, - - LocalFileRedirection, - QueenRedirection, - HTTPRedirection, - QueenOrLocalFileRedirection, - ]: - if tuple[0] == stype: - spec = stype() - spec.unserialize(serialized_spec) - return spec - raise RuntimeError("unable to unserialize subtree specification '%s'" % - (serialized_spec,)) -""" diff --git a/src/allmydata/filetree/vdrive.py b/src/allmydata/filetree/vdrive.py index 233dd20a..cc0e6a9d 100644 --- a/src/allmydata/filetree/vdrive.py +++ b/src/allmydata/filetree/vdrive.py @@ -51,10 +51,15 @@ class VirtualDrive(object): return node raise RuntimeError("unable to handle subtree type '%s'" % prefix) + def make_subtree_from_node(self, node, parent_is_mutable): + assert INode(node) + return self.opener.open(node, parent_is_mutable, + self.make_subtree_from_node) + # these methods are used to walk through our subtrees def _get_root(self): - return self.opener.open(self.root_node, False) + return self.make_subtree_from_node(self.root_node, False) def _get_node(self, path): d = self._get_closest_node(path) @@ -84,7 +89,7 @@ class VirtualDrive(object): # traversal done return (node, remaining_path) # otherwise, we must open and recurse into a new subtree - d = self.opener.open(node, parent_is_mutable) + d = self.make_subtree_from_node(node, parent_is_mutable) def _opened(next_subtree): next_subtree = ISubTree(next_subtree) return self._get_closest_node_1(next_subtree, remaining_path) @@ -147,6 +152,15 @@ class VirtualDrive(object): d.addCallback(_got_closest) return d + def _get_subtree_path(self, path): + # compute a list of [(subtree1, subpath1), ...], which represents + # which parts of 'path' traverse which subtrees. This can be used to + # present the virtual drive to the user in a form that includes + # redirection nodes (which do not consume path segments), or to + # figure out which subtrees need to be updated when the identity of a + # lower subtree (i.e. CHK) is changed. + pass # TODO + # these are called by the workqueue def add(self, path, new_node): @@ -164,9 +178,13 @@ class VirtualDrive(object): node.add(new_node_path, new_node) subtree = node.get_subtree() # now, tell the subtree to serialize and upload itself, using the - # workqueue. The subtree will also queue a step to notify its - # parent (using 'prepath'), if necessary. - return subtree.update(prepath, self.workqueue) + # workqueue. + boxname = subtree.update(self.workqueue) + if boxname: + # the parent needs to be notified, so queue a step to notify + # them (using 'prepath') + self.workqueue.add_addpath(boxname, prepath) + return self # TODO: what wold be the most useful? d.addCallback(_add_new_node) return d @@ -210,7 +228,10 @@ class VirtualDrive(object): node.delete(orphan_path) # now serialize and upload subtree = node.get_subtree() - return subtree.update(prepath, self.workqueue) + boxname = subtree.update(self.workqueue) + if boxname: + self.workqueue.add_addpath(boxname, prepath) + return self d.addCallback(_got_parent) return d diff --git a/src/allmydata/test/test_filetree_new.py b/src/allmydata/test/test_filetree_new.py index 4ef7c24e..92925b11 100644 --- a/src/allmydata/test/test_filetree_new.py +++ b/src/allmydata/test/test_filetree_new.py @@ -1,11 +1,11 @@ -from zope.interface import implements +#from zope.interface import implements from twisted.trial import unittest -from twisted.internet import defer -from allmydata.filetree.interfaces import IOpener, IDirectoryNode -from allmydata.filetree.directory import (#ImmutableDirectorySubTree, - SubTreeNode, - CHKDirectorySubTree) +#from twisted.internet import defer +#from allmydata.filetree.interfaces import IOpener, IDirectoryNode +#from allmydata.filetree.directory import (ImmutableDirectorySubTree, +# SubTreeNode, +# CHKDirectorySubTree) #from allmydata.filetree.specification import (CHKFileSpecification, # CHKDirectorySpecification) from allmydata import workqueue @@ -324,11 +324,16 @@ class Stuff(unittest.TestCase): dl = None if not root_node: root_node = directory.LocalFileSubTreeNode() - root_node.new("dirtree.save") + root_node.new("rootdirtree.save") v = vdrive.VirtualDrive(wq, dl, root_node) return v def testDirectory(self): + # TODO: we only need this VirtualDrive for the opener. Perhaps + # make_subtree_from_node should move out of that class and into a + # module-level function. + v = self.makeVirtualDrive("test_filetree_new/testDirectory") + # create an empty directory (stored locally) subtree = directory.LocalFileSubTree() subtree.new("dirtree.save") @@ -352,6 +357,7 @@ class Stuff(unittest.TestCase): self.failUnlessIdentical(root.get("foo.txt"), file1) subdir1a = root.get("subdir1") self.failUnlessIdentical(subdir1, subdir1a) + del subdir1a self.failUnless(IDirectoryNode.providedBy(subdir1)) self.failUnlessEqual(subdir1.list(), []) self.failUnlessIdentical(subdir1.get_subtree(), subtree) @@ -363,16 +369,43 @@ class Stuff(unittest.TestCase): subdir2.delete("subdir4") self.failUnlessEqual(subdir2.list(), ["subdir3"]) + del root, subdir1, subdir2, subdir3, subdir4 + # leaving file1 for later use + # now serialize it and reconstruct it f = StringIO() subtree.serialize_subtree_to_file(f) data = f.getvalue() #print data - # hrm, something is missing here.. subtree to ??? to node to subtree - - v = self.makeVirtualDrive("test_filetree_new/testDirectory") - #node = v.make_node_from_serialized(data) + node = subtree.create_node_now() + self.failUnless(isinstance(node, directory.LocalFileSubTreeNode)) + node_s = node.serialize_node() + self.failUnless(isinstance(node_s, str)) + self.failUnless(node_s.startswith("LocalFileDirectory:")) + self.failUnless("dirtree.save" in node_s) + + # now reconstruct it + d = v.make_subtree_from_node(node, False) + def _opened(new_subtree): + res = new_subtree.get_node_for_path([]) + (found_path, root, remaining_path) = res + self.failUnlessEqual(found_path, []) + self.failUnlessEqual(remaining_path, []) + self.failUnless(INode.providedBy(root)) + self.failUnless(IDirectoryNode.providedBy(root)) + self.failUnlessEqual(root.list(), ["foo.txt", "subdir1"]) + file1a = root.get("foo.txt") + self.failUnless(isinstance(CHKFileNode, file1a)) + self.failUnlessEqual(file1a.get_uri(), "uri1") + subdir1 = root.get("subdir1") + subdir2 = subdir1.get("subdir2") + self.failUnlessEqual(subdir2.list(), ["subdir3"]) + subdir2.delete("subdir3") + self.failUnlessEqual(subdir2.list(), []) + d.addCallback(_opened) + return d + testDirectory.todo = "not working yet" def testVdrive(self): # create some stuff, see if we can import everything @@ -389,6 +422,6 @@ class Stuff(unittest.TestCase): def start(): root_node = redirect.LocalFileRedirectionNode() - root_node.new("handle", dirtree) +# root_node.new("handle", dirtree) root = redirect.LocalFileRedirection() # wow, bootstrapping is hard diff --git a/src/allmydata/upload.py b/src/allmydata/upload.py index 9607fc93..a226f0d6 100644 --- a/src/allmydata/upload.py +++ b/src/allmydata/upload.py @@ -284,6 +284,9 @@ class IUploader(Interface): """Upload the file. 'uploadable' must impement IUploadable. This returns a Deferred which fires with the URI of the file.""" + def upload_ssk(write_capability, new_version, uploadable): + pass # TODO + class Uploader(service.MultiService): """I am a service that allows file uploading. """ diff --git a/src/allmydata/workqueue.py b/src/allmydata/workqueue.py index dcc154f9..c0bed206 100644 --- a/src/allmydata/workqueue.py +++ b/src/allmydata/workqueue.py @@ -25,7 +25,11 @@ class IWorkQueue(Interface): """ def create_tempfile(suffix=""): - """Return (f, filename).""" + """Return (f, filename), where 'f' is an open filehandle, and + 'filename' is a string that can be passed to other workqueue steps to + refer to that same file later. NOTE: 'filename' is not an absolute + path, rather it will be interpreted relative to some directory known + only by the workqueue.""" def create_boxname(contents=None): """Return a unique box name (as a string).""" @@ -40,12 +44,17 @@ class IWorkQueue(Interface): 'add_subpath' step will reference this boxname and retrieve the URI. """ - def add_upload_ssk(source_filename, write_capability, previous_version): + def add_upload_ssk(write_capability, previous_version, source_filename): """This step uploads a file to the mesh in a way that replaces the previous version and does not require a change to the ID referenced by the parent. """ + def add_queen_update_handle(handle, source_filename): + """Arrange for a central queen to be notified that the given handle + has been updated with the contents of the given tempfile. This will + send a set_handle() message to the queen.""" + def add_retain_ssk(read_capability): """Arrange for the given SSK to be kept alive.""" @@ -59,8 +68,8 @@ class IWorkQueue(Interface): file.""" def add_addpath(boxname, path): - """When executed, this step will retrieve the URI from the given box - and call root.add(path, URIishthingyTODO, etc). + """When executed, this step will retrieve the serialized INode from + the given box and call vdrive.add(path, node) . """ def add_unlink_uri(uri):