From: Brian Warner Date: Sat, 17 Oct 2009 19:28:29 +0000 (-0700) Subject: update many dirnode interfaces to accept dict-of-nodes instead of dict-of-caps X-Git-Tag: trac-4100~12 X-Git-Url: https://git.rkrishnan.org/%5B/frontends/%22news.html//%22%22.?a=commitdiff_plain;h=b4ec86c95a64d9114444b45cbe0ecbb3a334c5bc;p=tahoe-lafs%2Ftahoe-lafs.git update many dirnode interfaces to accept dict-of-nodes instead of dict-of-caps interfaces.py: define INodeMaker, document argument values, change create_new_mutable_directory() to take dict-of-nodes. Change dirnode.set_nodes() and dirnode.create_subdirectory() too. nodemaker.py: use INodeMaker, update create_new_mutable_directory() client.py: have create_dirnode() delegate initial_children= to nodemaker dirnode.py (Adder): take dict-of-nodes instead of list-of-nodes, which updates set_nodes() and create_subdirectory() web/common.py (convert_initial_children_json): create dict-of-nodes web/directory.py: same web/unlinked.py: same test_dirnode.py: update tests to match --- diff --git a/src/allmydata/client.py b/src/allmydata/client.py index 51ab2464..be6eb06e 100644 --- a/src/allmydata/client.py +++ b/src/allmydata/client.py @@ -458,9 +458,7 @@ class Client(node.Node, pollmixin.PollMixin): return self.nodemaker.create_from_cap(writecap, readcap) def create_dirnode(self, initial_children={}): - d = self.nodemaker.create_new_mutable_directory() - if initial_children: - d.addCallback(lambda n: n.set_children(initial_children)) + d = self.nodemaker.create_new_mutable_directory(initial_children) return d def create_mutable_file(self, contents=None, keysize=None): diff --git a/src/allmydata/dirnode.py b/src/allmydata/dirnode.py index 47618411..ce05477b 100644 --- a/src/allmydata/dirnode.py +++ b/src/allmydata/dirnode.py @@ -16,7 +16,7 @@ from allmydata.check_results import DeepCheckResults, \ DeepCheckAndRepairResults from allmydata.monitor import Monitor from allmydata.util import hashutil, mathutil, base32, log -from allmydata.util.assertutil import _assert, precondition +from allmydata.util.assertutil import precondition from allmydata.util.netstring import netstring, split_netstring from allmydata.uri import DirectoryURI, ReadonlyDirectoryURI, \ LiteralFileURI, from_string @@ -59,27 +59,22 @@ class Adder: def __init__(self, node, entries=None, overwrite=True): self.node = node if entries is None: - entries = [] + entries = {} + precondition(isinstance(entries, dict), entries) self.entries = entries self.overwrite = overwrite def set_node(self, name, node, metadata): precondition(isinstance(name, unicode), name) precondition(IFilesystemNode.providedBy(node), node) - self.entries.append( [name, node, metadata] ) + self.entries[name] = (node, metadata) def modify(self, old_contents, servermap, first_time): children = self.node._unpack_contents(old_contents) now = time.time() - for e in self.entries: - if len(e) == 2: - name, child = e - new_metadata = None - else: - assert len(e) == 3 - name, child, new_metadata = e - assert _assert(IFilesystemNode.providedBy(child), child) - assert isinstance(name, unicode) + for (name, (child, new_metadata)) in self.entries.iteritems(): + precondition(isinstance(name, unicode), name) + precondition(IFilesystemNode.providedBy(child), child) if name in children: if not self.overwrite: raise ExistingChildError("child '%s' already exists" % name) @@ -437,6 +432,7 @@ class DirectoryNode: return d def set_nodes(self, entries, overwrite=True): + precondition(isinstance(entries, dict), entries) if self.is_readonly(): return defer.fail(NotMutableError()) a = Adder(self, entries, overwrite=overwrite) @@ -477,7 +473,7 @@ class DirectoryNode: return defer.fail(NotMutableError()) d = self._nodemaker.create_new_mutable_directory(initial_children) def _created(child): - entries = [(name, child, None)] + entries = {name: (child, None)} a = Adder(self, entries, overwrite=overwrite) d = self._node.modify(a.modify) d.addCallback(lambda res: child) diff --git a/src/allmydata/interfaces.py b/src/allmydata/interfaces.py index 9b960167..74ebcde4 100644 --- a/src/allmydata/interfaces.py +++ b/src/allmydata/interfaces.py @@ -924,12 +924,12 @@ class IDirectoryNode(IMutableFilesystemNode): NotMutableError.""" def set_nodes(entries, overwrite=True): - """Add multiple (name, child_node) pairs (or (name, child_node, - metadata) triples) to a directory node. Returns a Deferred that fires - (with this dirnode) when the operation finishes. This is equivalent - to calling set_node() multiple times, but is much more efficient. All - child names must be unicode strings.""" - + """Add multiple children to a directory node. Takes a dict mapping + unicode childname to (child_node, metdata) tuples. If metdata=None, + the original metadata is left unmodified. Returns a Deferred that + fires (with this dirnode) when the operation finishes. This is + equivalent to calling set_node() multiple times, but is much more + efficient.""" def add_file(name, uploadable, metadata=None, overwrite=True): """I upload a file (using the given IUploadable), then attach the @@ -950,9 +950,9 @@ class IDirectoryNode(IMutableFilesystemNode): """I create and attach a directory at the given name. The new directory can be empty, or it can be populated with children according to 'initial_children', which takes a dictionary in the same - format as set_children (i.e. mapping unicode child name to (writecap, - readcap, metadata) triples). The child name must be a unicode string. - I return a Deferred that fires (with the new directory node) when the + format as set_nodes (i.e. mapping unicode child name to (childnode, + metadata) tuples). The child name must be a unicode string. I return + a Deferred that fires (with the new directory node) when the operation finishes.""" def move_child_to(current_child_name, new_parent, new_child_name=None, @@ -2028,7 +2028,7 @@ class IClient(Interface): """Create a new unattached dirnode, possibly with initial children. @param initial_children: dict with keys that are unicode child names, - and values that are (child_writecap, child_readcap, metadata) tuples. + and values that are (childnode, metadata) tuples. @return: a Deferred that fires with the new IDirectoryNode instance. """ @@ -2051,6 +2051,39 @@ class IClient(Interface): IDirectoryNode-providing instances, like DirectoryNode. """ +class INodeMaker(Interface): + """The NodeMaker is used to create IFilesystemNode instances. It can + accept a filecap/dircap string and return the node right away. It can + also create new nodes (i.e. upload a file, or create a mutable file) + asynchronously. Once you have one of these nodes, you can use other + methods to determine whether it is a file or directory, and to download + or modify its contents. + + The NodeMaker encapsulates all the authorities that these + IfilesystemNodes require (like references to the StorageFarmBroker). Each + Tahoe process will typically have a single NodeMaker, but unit tests may + create simplified/mocked forms for testing purposes. + """ + def create_from_cap(writecap, readcap=None): + """I create an IFilesystemNode from the given writecap/readcap. I can + only provide nodes for existing file/directory objects: use my other + methods to create new objects. I return synchronously.""" + + def create_mutable_file(contents=None, keysize=None): + """I create a new mutable file, and return a Deferred which will fire + with the IMutableFileNode instance when it is ready. If contents= is + provided (a bytestring), it will be used as the initial contents of + the new file, otherwise the file will contain zero bytes. keysize= is + for use by unit tests, to create mutable files that are smaller than + usual.""" + + def create_new_mutable_directory(initial_children={}): + """I create a new mutable directory, and return a Deferred which will + fire with the IDirectoryNode instance when it is ready. If + initial_children= is provided (a dict mapping unicode child name to + (childnode, metadata_dict) tuples), the directory will be populated + with those children, otherwise it will be empty.""" + class IClientStatus(Interface): def list_all_uploads(): """Return a list of uploader objects, one for each upload which diff --git a/src/allmydata/nodemaker.py b/src/allmydata/nodemaker.py index 8a0baf43..70a6b8a5 100644 --- a/src/allmydata/nodemaker.py +++ b/src/allmydata/nodemaker.py @@ -1,25 +1,15 @@ import weakref +from zope.interface import implements +from allmydata.interfaces import INodeMaker from allmydata.immutable.filenode import FileNode, LiteralFileNode from allmydata.mutable.filenode import MutableFileNode from allmydata.dirnode import DirectoryNode from allmydata.unknown import UnknownNode from allmydata.uri import DirectoryURI, ReadonlyDirectoryURI -# the "node maker" is a two-argument callable (really a 'create' method on a -# NodeMaker instance) which accepts a URI string (and an optional readcap -# string, for use by dirnode.copy) and returns an object which (at the very -# least) provides IFilesystemNode. That interface has other methods that can -# be used to determine if the node represents a file or directory, in which -# case other methods are available (like download() or modify()). Each Tahoe -# process will typically have a single NodeMaker, but unit tests may create -# simplified/mocked forms for test purposes. - -# any authorities which fsnodes will need (like a reference to the -# StorageFarmBroker, to access storage servers for publish/retrieve/download) -# will be retained as attributes inside the NodeMaker and passed to fsnodes -# as necessary. - class NodeMaker: + implements(INodeMaker) + def __init__(self, storage_broker, secret_holder, history, uploader, downloader, download_cache_dirman, default_encoding_parameters, key_generator): @@ -92,5 +82,5 @@ class NodeMaker: d = self.create_mutable_file() d.addCallback(self._create_dirnode) if initial_children: - d.addCallback(lambda n: n.set_children(initial_children)) + d.addCallback(lambda n: n.set_nodes(initial_children)) return d diff --git a/src/allmydata/test/test_dirnode.py b/src/allmydata/test/test_dirnode.py index d1c5881e..a4313dee 100644 --- a/src/allmydata/test/test_dirnode.py +++ b/src/allmydata/test/test_dirnode.py @@ -176,7 +176,7 @@ class Dirnode(GridTestMixin, unittest.TestCase, self.shouldFail(dirnode.NotMutableError, "set_uri ro", None, ro_dn.set_node, u"newchild", filenode) self.shouldFail(dirnode.NotMutableError, "set_nodes ro", None, - ro_dn.set_nodes, [ (u"newchild", filenode) ]) + ro_dn.set_nodes, { u"newchild": (filenode, None) }) self.shouldFail(dirnode.NotMutableError, "set_uri ro", None, ro_dn.add_file, u"newchild", uploadable) self.shouldFail(dirnode.NotMutableError, "set_uri ro", None, @@ -486,18 +486,17 @@ class Dirnode(GridTestMixin, unittest.TestCase, d.addCallback(lambda res: n.delete(u"e3")) # metadata through set_nodes() - d.addCallback(lambda res: n.set_nodes([ (u"f1", n), - (u"f2", n, {}), - (u"f3", n, - {"key": "value"}), - ])) + d.addCallback(lambda res: + n.set_nodes({ u"f1": (n, None), + u"f2": (n, {}), + u"f3": (n, {"key": "value"}), + })) d.addCallback(lambda n2: self.failUnlessIdentical(n2, n)) d.addCallback(lambda res: self.shouldFail(ExistingChildError, "set_nodes-no", "child 'f1' already exists", - n.set_nodes, - [ (u"f1", n), - (u"new", n), ], + n.set_nodes, { u"f1": (n, None), + u"new": (n, None), }, overwrite=False)) # and 'new' should not have been created d.addCallback(lambda res: n.list()) @@ -686,6 +685,7 @@ class Dirnode(GridTestMixin, unittest.TestCase, self.basedir = "dirnode/Dirnode/test_create_subdirectory" self.set_up_grid() c = self.g.clients[0] + nm = c.nodemaker d = c.create_dirnode() def _then(n): @@ -694,8 +694,8 @@ class Dirnode(GridTestMixin, unittest.TestCase, fake_file_uri = make_mutable_file_uri() other_file_uri = make_mutable_file_uri() md = {"metakey": "metavalue"} - kids = {u"kid1": (fake_file_uri, fake_file_uri), - u"kid2": (other_file_uri, other_file_uri, md), + kids = {u"kid1": (nm.create_from_cap(fake_file_uri), None), + u"kid2": (nm.create_from_cap(other_file_uri), md), } d = n.create_subdirectory(u"subdir", kids) def _check(sub): diff --git a/src/allmydata/web/common.py b/src/allmydata/web/common.py index 2c97e9f8..60a7e377 100644 --- a/src/allmydata/web/common.py +++ b/src/allmydata/web/common.py @@ -54,7 +54,10 @@ def get_arg(ctx_or_req, argname, default=None, multiple=False): return results[0] return default -def convert_initial_children_json(initial_children_json): +def convert_initial_children_json(nodemaker, initial_children_json): + """I convert the JSON output of GET?t=json into the dict-of-nodes input + to both dirnode.create_subdirectory() and + client.create_directory(initial_children=).""" initial_children = {} if initial_children_json: data = simplejson.loads(initial_children_json) @@ -67,7 +70,8 @@ def convert_initial_children_json(initial_children_json): if readcap is not None: readcap = str(readcap) metadata = propdict.get("metadata", {}) - initial_children[name] = (writecap, readcap, metadata) + childnode = nodemaker.create_from_cap(writecap, readcap) + initial_children[name] = (childnode, metadata) return initial_children def abbreviate_time(data): diff --git a/src/allmydata/web/directory.py b/src/allmydata/web/directory.py index d3febe95..81f26e59 100644 --- a/src/allmydata/web/directory.py +++ b/src/allmydata/web/directory.py @@ -101,8 +101,9 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin): else: req.content.seek(0) kids_json = req.content.read() - initial_children = convert_initial_children_json(kids_json) - d = self.node.create_subdirectory(name, initial_children) + kids = convert_initial_children_json(self.client.nodemaker, + kids_json) + d = self.node.create_subdirectory(name, kids) d.addCallback(make_handler_for, self.client, self.node, name) return d @@ -227,10 +228,9 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin): return defer.succeed(self.node.get_uri()) # TODO: urlencode name = name.decode("utf-8") replace = boolean_of_arg(get_arg(req, "replace", "true")) - children_json = get_arg(req, "children", "") - initial_children = convert_initial_children_json(children_json) - d = self.node.create_subdirectory(name, initial_children, - overwrite=replace) + kids_json = get_arg(req, "children", "") + kids = convert_initial_children_json(self.client.nodemaker, kids_json) + d = self.node.create_subdirectory(name, kids, overwrite=replace) d.addCallback(lambda child: child.get_uri()) # TODO: urlencode return d diff --git a/src/allmydata/web/unlinked.py b/src/allmydata/web/unlinked.py index 963b6452..bfad1185 100644 --- a/src/allmydata/web/unlinked.py +++ b/src/allmydata/web/unlinked.py @@ -27,9 +27,9 @@ def PUTUnlinkedSSK(req, client): def PUTUnlinkedCreateDirectory(req, client): # "PUT /uri?t=mkdir", to create an unlinked directory. req.content.seek(0) - initial_children_json = req.content.read() - initial_children = convert_initial_children_json(initial_children_json) - d = client.create_dirnode(initial_children=initial_children) + kids_json = req.content.read() + kids = convert_initial_children_json(client.nodemaker, kids_json) + d = client.create_dirnode(initial_children=kids) d.addCallback(lambda dirnode: dirnode.get_uri()) # XXX add redirect_to_result return d @@ -94,9 +94,9 @@ def POSTUnlinkedSSK(req, client): def POSTUnlinkedCreateDirectory(req, client): # "POST /uri?t=mkdir", to create an unlinked directory. - initial_json = get_arg(req, "children", "") - initial_children = convert_initial_children_json(initial_json) - d = client.create_dirnode(initial_children=initial_children) + kids_json = get_arg(req, "children", "") + kids = convert_initial_children_json(client.nodemaker, kids_json) + d = client.create_dirnode(initial_children=kids) redirect = get_arg(req, "redirect_to_result", "false") if boolean_of_arg(redirect): def _then_redir(res):