From: Brian Warner Date: Fri, 20 Nov 2009 07:52:55 +0000 (-0800) Subject: interface name cleanups: IFileNode, IImmutableFileNode, IMutableFileNode X-Git-Url: https://git.rkrishnan.org/components/%22news.html/...?a=commitdiff_plain;h=0cf320c2ab384bf2e491a780163e73e30b23432e;p=tahoe-lafs%2Ftahoe-lafs.git interface name cleanups: IFileNode, IImmutableFileNode, IMutableFileNode The proper hierarchy is: IFilesystemNode +IFileNode ++IMutableFileNode ++IImmutableFileNode +IDirectoryNode Also expand test_client.py (NodeMaker) to hit all IFilesystemNode types. --- diff --git a/src/allmydata/dirnode.py b/src/allmydata/dirnode.py index fb3cd2da..96c31ffb 100644 --- a/src/allmydata/dirnode.py +++ b/src/allmydata/dirnode.py @@ -8,8 +8,8 @@ import simplejson from allmydata.mutable.common import NotMutableError from allmydata.mutable.filenode import MutableFileNode from allmydata.unknown import UnknownNode -from allmydata.interfaces import IMutableFileNode, IDirectoryNode,\ - IFileNode, IFilesystemNode, \ +from allmydata.interfaces import IFilesystemNode, IDirectoryNode, IFileNode, \ + IImmutableFileNode, IMutableFileNode, \ ExistingChildError, NoSuchChildError, ICheckable, IDeepCheckable, \ CannotPackUnknownNodeError from allmydata.check_results import DeepCheckResults, \ @@ -687,7 +687,7 @@ class DeepStats: self.add("count-mutable-files") # TODO: update the servermap, compute a size, add it to # size-mutable-files, max it into "largest-mutable-file" - elif IFileNode.providedBy(node): # CHK and LIT + elif IImmutableFileNode.providedBy(node): # CHK and LIT self.add("count-files") size = node.get_size() self.histogram("size-files-histogram", size) diff --git a/src/allmydata/immutable/filenode.py b/src/allmydata/immutable/filenode.py index 3b239687..c57709b3 100644 --- a/src/allmydata/immutable/filenode.py +++ b/src/allmydata/immutable/filenode.py @@ -5,7 +5,7 @@ from twisted.internet import defer from twisted.internet.interfaces import IPushProducer, IConsumer from twisted.protocols import basic from foolscap.api import eventually -from allmydata.interfaces import IFileNode, ICheckable, \ +from allmydata.interfaces import IImmutableFileNode, ICheckable, \ IDownloadTarget, IUploadResults from allmydata.util import dictutil, log, base32 from allmydata.uri import CHKFileURI, LiteralFileURI @@ -15,7 +15,7 @@ from allmydata.immutable.repairer import Repairer from allmydata.immutable import download class _ImmutableFileNodeBase(object): - implements(IFileNode, ICheckable) + implements(IImmutableFileNode, ICheckable) def get_readonly_uri(self): return self.get_uri() @@ -29,12 +29,12 @@ class _ImmutableFileNodeBase(object): def __hash__(self): return self.u.__hash__() def __eq__(self, other): - if IFileNode.providedBy(other): + if isinstance(other, _ImmutableFileNodeBase): return self.u.__eq__(other.u) else: return False def __ne__(self, other): - if IFileNode.providedBy(other): + if isinstance(other, _ImmutableFileNodeBase): return self.u.__eq__(other.u) else: return True diff --git a/src/allmydata/interfaces.py b/src/allmydata/interfaces.py index 38427bdf..c6897ef5 100644 --- a/src/allmydata/interfaces.py +++ b/src/allmydata/interfaces.py @@ -483,6 +483,13 @@ class UnhandledCapTypeError(Exception): class NotDeepImmutableError(Exception): """Deep-immutable directories can only contain deep-immutable children""" +# The hierarchy looks like this: +# IFilesystemNode +# IFileNode +# IMutableFileNode +# IImmutableFileNode +# IDirectoryNode + class IFilesystemNode(Interface): def get_cap(): """Return the strongest 'cap instance' associated with this node. @@ -563,10 +570,11 @@ class IFilesystemNode(Interface): data this node represents. """ -class IMutableFilesystemNode(IFilesystemNode): - pass - class IFileNode(IFilesystemNode): + """I am a node which represents a file: a sequence of bytes. I am not a + container, like IDirectoryNode.""" + +class IImmutableFileNode(IFileNode): def download(target): """Download the file's contents to a given IDownloadTarget""" @@ -626,7 +634,7 @@ class IFileNode(IFilesystemNode): """ -class IMutableFileNode(IFileNode, IMutableFilesystemNode): +class IMutableFileNode(IFileNode): """I provide access to a 'mutable file', which retains its identity regardless of what contents are put in it. @@ -819,10 +827,11 @@ class ExistingChildError(Exception): class NoSuchChildError(Exception): """A directory node was asked to fetch a child which does not exist.""" -class IDirectoryNode(IMutableFilesystemNode): - """I represent a name-to-child mapping, holding the tahoe equivalent of a - directory. All child names are unicode strings, and all children are some - sort of IFilesystemNode (either files or subdirectories). +class IDirectoryNode(IFilesystemNode): + """I represent a filesystem node that is a container, with a + name-to-child mapping, holding the tahoe equivalent of a directory. All + child names are unicode strings, and all children are some sort of + IFilesystemNode (either files or subdirectories). """ def get_uri(): @@ -846,8 +855,8 @@ class IDirectoryNode(IMutableFilesystemNode): def list(): """I return a Deferred that fires with a dictionary mapping child name (a unicode string) to (node, metadata_dict) tuples, in which - 'node' is either an IFileNode or IDirectoryNode, and 'metadata_dict' - is a dictionary of metadata.""" + 'node' is an IFilesystemNode (either IFileNode or IDirectoryNode), + and 'metadata_dict' is a dictionary of metadata.""" def has_child(name): """I return a Deferred that fires with a boolean, True if there @@ -877,7 +886,7 @@ class IDirectoryNode(IMutableFilesystemNode): name.""" def get_child_at_path(path): - """Transform a child path into an IDirectoryNode or IFileNode. + """Transform a child path into an IFilesystemNode. I perform a recursive series of 'get' operations to find the named descendant node. I return a Deferred that fires with the node, or @@ -888,8 +897,7 @@ class IDirectoryNode(IMutableFilesystemNode): """ def get_child_and_metadata_at_path(path): - """Transform a child path into an IDirectoryNode/IFileNode and - metadata. + """Transform a child path into an IFilesystemNode and metadata. I am like get_child_at_path(), but my Deferred fires with a tuple of (node, metadata). The metadata comes from the last edge. If the path @@ -934,7 +942,7 @@ class IDirectoryNode(IMutableFilesystemNode): when the operation finishes. This Deferred will fire with the child node that was just added. I will replace any existing child of the same name. The child name must be a unicode string. The 'child' - instance must be an instance providing IDirectoryNode or IFileNode. + instance must be an instance providing IFilesystemNode. If metadata= is provided, I will use it as the metadata for the named edge. This will replace any existing metadata. If metadata= is left @@ -2068,10 +2076,10 @@ class IClient(Interface): @return: an instance that provides IFilesystemNode (or more usefully one of its subclasses). File-specifying URIs will result in - IFileNode or IMutableFileNode -providing instances, like - ImmutableFileNode, LiteralFileNode, or MutableFileNode. - Directory-specifying URIs will result in - IDirectoryNode-providing instances, like DirectoryNode. + IFileNode-providing instances, like ImmutableFileNode, + LiteralFileNode, or MutableFileNode. Directory-specifying + URIs will result in IDirectoryNode-providing instances, like + DirectoryNode. """ class INodeMaker(Interface): @@ -2083,7 +2091,7 @@ class INodeMaker(Interface): or modify its contents. The NodeMaker encapsulates all the authorities that these - IfilesystemNodes require (like references to the StorageFarmBroker). Each + 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. """ diff --git a/src/allmydata/test/common.py b/src/allmydata/test/common.py index 311dc873..98bb6aed 100644 --- a/src/allmydata/test/common.py +++ b/src/allmydata/test/common.py @@ -8,7 +8,7 @@ from twisted.web.error import Error as WebError from foolscap.api import flushEventualQueue, fireEventually from allmydata import uri, dirnode, client from allmydata.introducer.server import IntroducerNode -from allmydata.interfaces import IMutableFileNode, IFileNode, \ +from allmydata.interfaces import IMutableFileNode, IImmutableFileNode, \ FileTooLargeError, NotEnoughSharesError, ICheckable from allmydata.check_results import CheckResults, CheckAndRepairResults, \ DeepCheckResults, DeepCheckAndRepairResults @@ -32,9 +32,9 @@ def flush_but_dont_ignore(res): return d class FakeCHKFileNode: - """I provide IFileNode, but all of my data is stored in a class-level - dictionary.""" - implements(IFileNode) + """I provide IImmutableFileNode, but all of my data is stored in a + class-level dictionary.""" + implements(IImmutableFileNode) all_contents = {} bad_shares = {} diff --git a/src/allmydata/test/test_client.py b/src/allmydata/test/test_client.py index 38cbdc22..1194826a 100644 --- a/src/allmydata/test/test_client.py +++ b/src/allmydata/test/test_client.py @@ -9,7 +9,8 @@ from allmydata import client from allmydata.storage_client import StorageFarmBroker from allmydata.introducer.client import IntroducerClient from allmydata.util import base32, fileutil -from allmydata.interfaces import IFilesystemNode, IFileNode, IDirectoryNode +from allmydata.interfaces import IFilesystemNode, IFileNode, \ + IImmutableFileNode, IMutableFileNode, IDirectoryNode from foolscap.api import flushEventualQueue import common_util as testutil @@ -247,13 +248,44 @@ class NodeMaker(unittest.TestCase): n = c.create_node_from_uri("URI:CHK:6nmrpsubgbe57udnexlkiwzmlu:bjt7j6hshrlmadjyr7otq3dc24end5meo5xcr5xe5r663po6itmq:3:10:7277") self.failUnless(IFilesystemNode.providedBy(n)) self.failUnless(IFileNode.providedBy(n)) + self.failUnless(IImmutableFileNode.providedBy(n)) + self.failIf(IMutableFileNode.providedBy(n)) self.failIf(IDirectoryNode.providedBy(n)) self.failUnless(n.is_readonly()) self.failIf(n.is_mutable()) + n = c.create_node_from_uri("URI:LIT:n5xgk") + self.failUnless(IFilesystemNode.providedBy(n)) + self.failUnless(IFileNode.providedBy(n)) + self.failUnless(IImmutableFileNode.providedBy(n)) + self.failIf(IMutableFileNode.providedBy(n)) + self.failIf(IDirectoryNode.providedBy(n)) + self.failUnless(n.is_readonly()) + self.failIf(n.is_mutable()) + + n = c.create_node_from_uri("URI:SSK:n6x24zd3seu725yluj75q5boaa:mm6yoqjhl6ueh7iereldqxue4nene4wl7rqfjfybqrehdqmqskvq") + self.failUnless(IFilesystemNode.providedBy(n)) + self.failUnless(IFileNode.providedBy(n)) + self.failIf(IImmutableFileNode.providedBy(n)) + self.failUnless(IMutableFileNode.providedBy(n)) + self.failIf(IDirectoryNode.providedBy(n)) + self.failIf(n.is_readonly()) + self.failUnless(n.is_mutable()) + + n = c.create_node_from_uri("URI:SSK-RO:b7sr5qsifnicca7cbk3rhrhbvq:mm6yoqjhl6ueh7iereldqxue4nene4wl7rqfjfybqrehdqmqskvq") + self.failUnless(IFilesystemNode.providedBy(n)) + self.failUnless(IFileNode.providedBy(n)) + self.failIf(IImmutableFileNode.providedBy(n)) + self.failUnless(IMutableFileNode.providedBy(n)) + self.failIf(IDirectoryNode.providedBy(n)) + self.failUnless(n.is_readonly()) + self.failUnless(n.is_mutable()) + n = c.create_node_from_uri("URI:DIR2:n6x24zd3seu725yluj75q5boaa:mm6yoqjhl6ueh7iereldqxue4nene4wl7rqfjfybqrehdqmqskvq") self.failUnless(IFilesystemNode.providedBy(n)) self.failIf(IFileNode.providedBy(n)) + self.failIf(IImmutableFileNode.providedBy(n)) + self.failIf(IMutableFileNode.providedBy(n)) self.failUnless(IDirectoryNode.providedBy(n)) self.failIf(n.is_readonly()) self.failUnless(n.is_mutable()) @@ -261,6 +293,8 @@ class NodeMaker(unittest.TestCase): n = c.create_node_from_uri("URI:DIR2-RO:b7sr5qsifnicca7cbk3rhrhbvq:mm6yoqjhl6ueh7iereldqxue4nene4wl7rqfjfybqrehdqmqskvq") self.failUnless(IFilesystemNode.providedBy(n)) self.failIf(IFileNode.providedBy(n)) + self.failIf(IImmutableFileNode.providedBy(n)) + self.failIf(IMutableFileNode.providedBy(n)) self.failUnless(IDirectoryNode.providedBy(n)) self.failUnless(n.is_readonly()) self.failUnless(n.is_mutable()) @@ -269,5 +303,7 @@ class NodeMaker(unittest.TestCase): n = c.create_node_from_uri(future) self.failUnless(IFilesystemNode.providedBy(n)) self.failIf(IFileNode.providedBy(n)) + self.failIf(IImmutableFileNode.providedBy(n)) + self.failIf(IMutableFileNode.providedBy(n)) self.failIf(IDirectoryNode.providedBy(n)) self.failUnlessEqual(n.get_uri(), future) diff --git a/src/allmydata/test/test_dirnode.py b/src/allmydata/test/test_dirnode.py index 65f781ba..fd591bed 100644 --- a/src/allmydata/test/test_dirnode.py +++ b/src/allmydata/test/test_dirnode.py @@ -6,7 +6,7 @@ from twisted.internet import defer from allmydata import uri, dirnode from allmydata.client import Client from allmydata.immutable import upload -from allmydata.interfaces import IFileNode, IMutableFileNode, \ +from allmydata.interfaces import IImmutableFileNode, IMutableFileNode, \ ExistingChildError, NoSuchChildError, NotDeepImmutableError, \ IDeepCheckResults, IDeepCheckAndRepairResults, CannotPackUnknownNodeError from allmydata.mutable.filenode import MutableFileNode @@ -762,7 +762,7 @@ class Dirnode(GridTestMixin, unittest.TestCase, uploadable1 = upload.Data("some data", convergence="converge") d.addCallback(lambda res: n.add_file(u"newfile", uploadable1)) d.addCallback(lambda newnode: - self.failUnless(IFileNode.providedBy(newnode))) + self.failUnless(IImmutableFileNode.providedBy(newnode))) uploadable2 = upload.Data("some data", convergence="stuff") d.addCallback(lambda res: self.shouldFail(ExistingChildError, "add_file-no", @@ -784,7 +784,7 @@ class Dirnode(GridTestMixin, unittest.TestCase, uploadable3, {"key": "value"})) d.addCallback(lambda newnode: - self.failUnless(IFileNode.providedBy(newnode))) + self.failUnless(IImmutableFileNode.providedBy(newnode))) d.addCallback(lambda res: n.get_metadata_for(u"newfile-metadata")) d.addCallback(lambda metadata: self.failUnless((set(metadata.keys()) == set(["key", "tahoe"])) and diff --git a/src/allmydata/web/directory.py b/src/allmydata/web/directory.py index b4fe195e..2c8a609d 100644 --- a/src/allmydata/web/directory.py +++ b/src/allmydata/web/directory.py @@ -14,8 +14,8 @@ from foolscap.api import fireEventually from allmydata.util import base32, time_format from allmydata.uri import from_string_dirnode -from allmydata.interfaces import IDirectoryNode, IFileNode, IMutableFileNode, \ - IFilesystemNode, ExistingChildError, NoSuchChildError +from allmydata.interfaces import IDirectoryNode, IFileNode, IFilesystemNode, \ + IImmutableFileNode, IMutableFileNode, ExistingChildError, NoSuchChildError from allmydata.monitor import Monitor, OperationCancelledError from allmydata import dirnode from allmydata.web.common import text_plain, WebError, \ @@ -40,8 +40,6 @@ class BlockingFileError(Exception): def make_handler_for(node, client, parentnode=None, name=None): if parentnode: assert IDirectoryNode.providedBy(parentnode) - if IMutableFileNode.providedBy(node): - return FileNodeHandler(client, node, parentnode, name) if IFileNode.providedBy(node): return FileNodeHandler(client, node, parentnode, name) if IDirectoryNode.providedBy(node): @@ -687,7 +685,7 @@ class DirectoryAsHTML(rend.Page): info_link = "%s/uri/%s?t=info" % (root, quoted_uri) - elif IFileNode.providedBy(target): + elif IImmutableFileNode.providedBy(target): dlurl = "%s/file/%s/@@named=/%s" % (root, quoted_uri, nameurl) ctx.fillSlots("filename", @@ -789,17 +787,16 @@ def DirectoryJSONMetadata(ctx, dirnode): assert IFilesystemNode.providedBy(childnode), childnode rw_uri = childnode.get_uri() ro_uri = childnode.get_readonly_uri() - if (IDirectoryNode.providedBy(childnode) - or IFileNode.providedBy(childnode)): + if IFileNode.providedBy(childnode): if childnode.is_readonly(): rw_uri = None - if IFileNode.providedBy(childnode): kiddata = ("filenode", {'size': childnode.get_size(), 'mutable': childnode.is_mutable(), }) elif IDirectoryNode.providedBy(childnode): - kiddata = ("dirnode", {'mutable': childnode.is_mutable(), - }) + if childnode.is_readonly(): + rw_uri = None + kiddata = ("dirnode", {'mutable': childnode.is_mutable()}) else: kiddata = ("unknown", {}) kiddata[1]["metadata"] = metadata