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# Copyright 2016 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""A file in an archive."""
from __future__ import absolute_import, print_function, unicode_literals
__metaclass__ = type
__all__ = [
'ArchiveFile',
'ArchiveFileSet',
]
import os.path
import pytz
from storm.databases.postgres import Returning
from storm.locals import (
And,
DateTime,
Int,
Reference,
Storm,
Unicode,
)
from zope.component import getUtility
from zope.interface import implementer
from lp.services.database.bulk import load_related
from lp.services.database.constants import UTC_NOW
from lp.services.database.decoratedresultset import DecoratedResultSet
from lp.services.database.interfaces import (
IMasterStore,
IStore,
)
from lp.services.database.stormexpr import BulkUpdate
from lp.services.librarian.interfaces import ILibraryFileAliasSet
from lp.services.librarian.model import (
LibraryFileAlias,
LibraryFileContent,
)
from lp.soyuz.interfaces.archivefile import (
IArchiveFile,
IArchiveFileSet,
)
@implementer(IArchiveFile)
class ArchiveFile(Storm):
"""See `IArchiveFile`."""
__storm_table__ = 'ArchiveFile'
id = Int(primary=True)
archive_id = Int(name='archive', allow_none=False)
archive = Reference(archive_id, 'Archive.id')
container = Unicode(name='container', allow_none=False)
path = Unicode(name='path', allow_none=False)
library_file_id = Int(name='library_file', allow_none=False)
library_file = Reference(library_file_id, 'LibraryFileAlias.id')
scheduled_deletion_date = DateTime(
name='scheduled_deletion_date', tzinfo=pytz.UTC, allow_none=True)
def __init__(self, archive, container, path, library_file):
"""Construct an `ArchiveFile`."""
super(ArchiveFile, self).__init__()
self.archive = archive
self.container = container
self.path = path
self.library_file = library_file
self.scheduled_deletion_date = None
@implementer(IArchiveFileSet)
class ArchiveFileSet:
"""See `IArchiveFileSet`."""
@staticmethod
def new(archive, container, path, library_file):
"""See `IArchiveFileSet`."""
archive_file = ArchiveFile(archive, container, path, library_file)
IMasterStore(ArchiveFile).add(archive_file)
return archive_file
@classmethod
def newFromFile(cls, archive, container, path, fileobj, size,
content_type):
library_file = getUtility(ILibraryFileAliasSet).create(
os.path.basename(path), size, fileobj, content_type,
restricted=archive.private, allow_zero_length=True)
return cls.new(archive, container, path, library_file)
@staticmethod
def getByArchive(archive, container=None, path=None, only_condemned=False,
eager_load=False):
"""See `IArchiveFileSet`."""
clauses = [ArchiveFile.archive == archive]
# XXX cjwatson 2016-03-15: We'll need some more sophisticated way to
# match containers once we're using them for custom uploads.
if container is not None:
clauses.append(ArchiveFile.container == container)
if path is not None:
clauses.append(ArchiveFile.path == path)
if only_condemned:
clauses.append(ArchiveFile.scheduled_deletion_date != None)
archive_files = IStore(ArchiveFile).find(ArchiveFile, *clauses)
def eager_load(rows):
lfas = load_related(LibraryFileAlias, rows, ["library_file_id"])
load_related(LibraryFileContent, lfas, ["contentID"])
if eager_load:
return DecoratedResultSet(archive_files, pre_iter_hook=eager_load)
else:
return archive_files
@staticmethod
def scheduleDeletion(archive_files, stay_of_execution):
"""See `IArchiveFileSet`."""
clauses = [
ArchiveFile.id.is_in(
set(archive_file.id for archive_file in archive_files)),
ArchiveFile.library_file == LibraryFileAlias.id,
LibraryFileAlias.content == LibraryFileContent.id,
]
new_date = UTC_NOW + stay_of_execution
return_columns = [
ArchiveFile.container, ArchiveFile.path, LibraryFileContent.sha256]
return list(IMasterStore(ArchiveFile).execute(Returning(
BulkUpdate(
{ArchiveFile.scheduled_deletion_date: new_date},
table=ArchiveFile,
values=[LibraryFileAlias, LibraryFileContent],
where=And(*clauses)),
columns=return_columns)))
@staticmethod
def unscheduleDeletion(archive_files):
"""See `IArchiveFileSet`."""
clauses = [
ArchiveFile.id.is_in(
set(archive_file.id for archive_file in archive_files)),
ArchiveFile.library_file == LibraryFileAlias.id,
LibraryFileAlias.content == LibraryFileContent.id,
]
return_columns = [
ArchiveFile.container, ArchiveFile.path, LibraryFileContent.sha256]
return list(IMasterStore(ArchiveFile).execute(Returning(
BulkUpdate(
{ArchiveFile.scheduled_deletion_date: None},
table=ArchiveFile,
values=[LibraryFileAlias, LibraryFileContent],
where=And(*clauses)),
columns=return_columns)))
@staticmethod
def getContainersToReap(archive, container_prefix=None):
clauses = [
ArchiveFile.archive == archive,
ArchiveFile.scheduled_deletion_date < UTC_NOW,
]
if container_prefix is not None:
clauses.append(ArchiveFile.container.startswith(container_prefix))
return IStore(ArchiveFile).find(
ArchiveFile.container, *clauses).group_by(ArchiveFile.container)
@staticmethod
def reap(archive, container=None):
"""See `IArchiveFileSet`."""
# XXX cjwatson 2016-03-30 bug=322972: Requires manual SQL due to
# lack of support for DELETE FROM ... USING ... in Storm.
clauses = [
"ArchiveFile.archive = ?",
"ArchiveFile.scheduled_deletion_date < "
"CURRENT_TIMESTAMP AT TIME ZONE 'UTC'",
"ArchiveFile.library_file = LibraryFileAlias.id",
"LibraryFileAlias.content = LibraryFileContent.id",
]
values = [archive.id]
if container is not None:
clauses.append("ArchiveFile.container = ?")
values.append(container)
return list(IMasterStore(ArchiveFile).execute("""
DELETE FROM ArchiveFile
USING LibraryFileAlias, LibraryFileContent
WHERE """ + " AND ".join(clauses) + """
RETURNING
ArchiveFile.container,
ArchiveFile.path,
LibraryFileContent.sha256
""", values))
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