def packer():
yield "started %s" % datetime.now()
items = self.gen_oid_record(start_oid=int8_to_str(0))
for step in Shelf.generate_shelf(file, items):
yield step
file.flush()
file.fsync()
shelf = Shelf(file)
yield "base written %s" % datetime.now()
# Invalidate oids that have been removed.
for hole in shelf.get_offset_map().gen_holes():
yield hole
oid = int8_to_str(hole)
if self.shelf.get_position(oid) is not None:
assert shelf.get_position(oid) is None
self.invalid.add(oid)
yield "invalidations identified %s" % datetime.now()
shelf.store(
(name, self.shelf.get_value(name)) for name in self.pack_extra)
file.flush()
file.fsync()
if not self.shelf.get_file().is_temporary():
self.shelf.get_file().rename(file_path + '.prepack')
self.shelf.get_file().close()
shelf.get_file().rename(file_path)
self.shelf = shelf
self.pack_extra = None
yield "finished %s" % datetime.now()
def check_connection(self):
self.conn = conn = Connection(self._get_storage())
self.root = root = conn.get_root()
assert root._p_is_ghost() == False
assert root is conn.get(int8_to_str(0))
assert root is conn.get(0)
assert conn is root._p_connection
assert conn.get(int8_to_str(1)) == None
conn.abort()
conn.commit()
assert root._p_is_ghost() == False
root['a'] = Persistent()
assert root._p_is_unsaved() == True
assert root['a']._p_is_unsaved() == True
root['a'].f = 2
assert list(conn.changed.values()) == [root]
conn.commit()
assert root._p_is_saved()
assert list(conn.changed.values()) == []
root['a'] = Persistent()
assert list(conn.changed.values()) == [root]
root['b'] = Persistent()
root['a'].a = 'a'
root['b'].b = 'b'
conn.commit()
root['a'].a = 'a'
root['b'].b = 'b'
conn.abort()
conn.shrink_cache()
root['b'].b = 'b'
del conn
def check_file_storage(self):
name = mktemp()
b = FileStorage(name)
assert b.new_oid() == int8_to_str(0)
assert b.new_oid() == int8_to_str(1)
assert b.new_oid() == int8_to_str(2)
raises(KeyError, b.load, int8_to_str(0))
record = pack_record(int8_to_str(0), as_bytes('ok'), as_bytes(''))
b.begin()
b.store(int8_to_str(0), record)
b.end()
b.sync()
b.begin()
b.store(int8_to_str(1),
pack_record(int8_to_str(1), as_bytes('no'), as_bytes('')))
b.end()
assert len(list(b.gen_oid_record(start_oid=int8_to_str(0)))) == 1
assert len(list(b.gen_oid_record())) == 2
b.pack()
b.close()
unlink(name + '.prepack')
raises(ValueError, b.pack) # storage closed
unlink(name + '.pack')
raises(ValueError, b.load, int8_to_str(0)) # storage closed
unlink(name)
def check_connection(self):
self.conn=conn=Connection(self._get_storage())
self.root=root=conn.get_root()
assert root._p_is_ghost() == False
assert root is conn.get(int8_to_str(0))
assert root is conn.get(0)
assert conn is root._p_connection
assert conn.get(int8_to_str(1)) == None
conn.abort()
conn.commit()
assert root._p_is_ghost() == False
root['a'] = Persistent()
assert root._p_is_unsaved() == True
assert root['a']._p_is_unsaved() == True
root['a'].f=2
assert list(conn.changed.values()) == [root]
conn.commit()
assert root._p_is_saved()
assert list(conn.changed.values()) == []
root['a'] = Persistent()
assert list(conn.changed.values()) == [root]
root['b'] = Persistent()
root['a'].a = 'a'
root['b'].b = 'b'
conn.commit()
root['a'].a = 'a'
root['b'].b = 'b'
conn.abort()
conn.shrink_cache()
root['b'].b = 'b'
del conn
def packer():
yield "started %s" % datetime.now()
seen = IntSet()
items = self.gen_oid_record(start_oid=int8_to_str(0), seen=seen)
for step in Shelf.generate_shelf(file, items):
yield step
file.flush()
file.fsync()
shelf = Shelf(file)
yield "base written %s" % datetime.now()
# Invalidate oids that have been removed.
for hole in shelf.get_offset_map().gen_holes():
yield hole
oid = int8_to_str(hole)
if self.shelf.get_position(oid) is not None:
assert shelf.get_position(oid) is None
self.invalid.add(oid)
yield "invalidations identified %s" % datetime.now()
for oid in self.pack_extra:
seen.discard(str_to_int8(oid))
for oid in self.pack_extra:
shelf.store(self.gen_oid_record(start_oid=oid, seen=seen))
file.flush()
file.fsync()
if not self.shelf.get_file().is_temporary():
self.shelf.get_file().rename(file_path + '.prepack')
self.shelf.get_file().close()
shelf.get_file().rename(file_path)
self.shelf = shelf
self.pack_extra = None
yield "finished %s" % datetime.now()
def check_file_storage(self):
name = mktemp()
b = FileStorage(name)
assert b.new_oid() == int8_to_str(0)
assert b.new_oid() == int8_to_str(1)
assert b.new_oid() == int8_to_str(2)
raises(KeyError, b.load, int8_to_str(0))
record = pack_record(int8_to_str(0), as_bytes('ok'), as_bytes(''))
b.begin()
b.store(int8_to_str(0), record)
b.end()
b.sync()
b.begin()
b.store(int8_to_str(1), pack_record(
int8_to_str(1), as_bytes('no'), as_bytes('')))
b.end()
assert len(list(b.gen_oid_record(start_oid=int8_to_str(0)))) == 1
assert len(list(b.gen_oid_record())) == 2
b.pack()
b.close()
unlink(name + '.prepack')
raises(ValueError, b.pack) # storage closed
unlink(name + '.pack')
raises(ValueError, b.load, int8_to_str(0)) # storage closed
unlink(name)
def generate_unused_names():
for j in self.offset_map.gen_holes():
name = int8_to_str(j)
if name not in self.memory_index:
yield name
# Now continue with values above those in the offset map.
j = self.offset_map.get_array_size()
while True:
name = int8_to_str(j)
if name not in self.memory_index:
yield name
j += 1
def generate_unused_names():
for j in self.offset_map.gen_holes():
name = int8_to_str(j)
if name not in self.memory_index:
yield name
# Now continue with values above those in the offset map.
j = self.offset_map.get_array_size()
while True:
name = int8_to_str(j)
if name not in self.memory_index:
yield name
j += 1
def check_accessors(self):
p = PersistentObject()
p._p_oid
assert p._p_format_oid() == 'None'
p._p_oid = int8_to_str(1)
assert p._p_format_oid() == '1'
assert repr(p) == "<PersistentObject 1>"
def check_accessors(self):
p = PersistentObject()
p._p_oid
assert p._p_format_oid() == 'None'
p._p_oid = int8_to_str(1)
assert p._p_format_oid() == '1'
assert repr(p) == "<PersistentObject 1>"
def store(self, oid, record):
"""(str, str)"""
self.pending_records[oid] = record
if (oid not in self.allocated_unused_oids and oid not in self.shelf
and oid != int8_to_str(0)):
self.begin()
raise ValueError("oid %r is a surprise" % oid)
def b(self):
n = 1000
s = BytesIO()
word_array = WordArray(file=s, bytes_per_word=8, number_of_words=n)
for x in xrange(n):
word_array[x] = int8_to_str(x)
assert word_array[-1] == int8_to_str(n - 1)
for x in xrange(n):
assert x == str_to_int8(word_array[x])
word_array[x] = int8_to_str(2*x)
assert x == str_to_int8(word_array[x]) / 2
assert len(word_array) == n
assert raises(IndexError, word_array.__getitem__, n + 1)
s.seek(0)
word_array2 = WordArray(file=s)
word_array2[-1] = as_bytes('mmmmmmmm')
assert word_array2[-1] == as_bytes('mmmmmmmm')
def iterindex(self):
for n, position in iteritems(self.offset_map):
if position < self.offset_map.get_start():
name = int8_to_str(n)
if name not in self.memory_index:
yield name, position
for item in list(self.memory_index.items()):
yield item
def check_conflict(self):
b = Connection(self._get_storage())
c = Connection(self._get_storage())
rootb = b.get(int8_to_str(0))
rootb['b'] = Persistent()
rootc = c.get(int8_to_str(0))
rootc['c'] = Persistent()
c.commit()
raises(ConflictError, b.commit)
raises(KeyError, rootb.__getitem__, 'c')
transaction_serial = b.transaction_serial
b.abort()
assert b.get_transaction_serial() > transaction_serial
assert rootb._p_is_ghost()
rootc['d'] = Persistent()
c.commit()
rootb['d']
def iterindex(self):
for n, position in iteritems(self.offset_map):
if position < self.offset_map.get_start():
name = int8_to_str(n)
if name not in self.memory_index:
yield name, position
for item in list(self.memory_index.items()):
yield item
def check_conflict(self):
b = Connection(self._get_storage())
c = Connection(self._get_storage())
rootb = b.get(int8_to_str(0))
rootb['b'] = Persistent()
rootc = c.get(int8_to_str(0))
rootc['c'] = Persistent()
c.commit()
raises(ConflictError, b.commit)
raises(KeyError, rootb.__getitem__, 'c')
transaction_serial = b.transaction_serial
b.abort()
assert b.get_transaction_serial() > transaction_serial
assert rootb._p_is_ghost()
rootc['d'] = Persistent()
c.commit()
rootb['d']
def store(self, oid, record):
"""(str, str)"""
self.pending_records[oid] = record
if (oid not in self.allocated_unused_oids and
oid not in self.shelf and
oid != int8_to_str(0)):
self.begin()
raise ValueError("oid %r is a surprise" % oid)
def check_storage_tools(self):
connection = Connection(self._get_storage())
root = connection.get_root()
root['a'] = Persistent()
root['b'] = Persistent()
connection.commit()
index = get_reference_index(connection.get_storage())
assert index == {
int8_to_str(1): [int8_to_str(0)], int8_to_str(2): [int8_to_str(0)]}
census = get_census(connection.get_storage())
assert census == {as_bytes('PersistentDict'):1, as_bytes('Persistent'):2}
references = list(gen_referring_oid_record(connection.get_storage(),
int8_to_str(1)))
assert references == [
(int8_to_str(0), connection.get_storage().load(int8_to_str(0)))]
class Fake(object):
pass
s = Fake()
s.__class__ = Storage
raises(RuntimeError, s.__init__)
raises(NotImplementedError, s.load, None)
raises(NotImplementedError, s.begin)
raises(NotImplementedError, s.store, None, None)
raises(NotImplementedError, s.end)
raises(NotImplementedError, s.sync)
g = s.gen_oid_record()
raises(NotImplementedError, next, g)
def check_storage_tools(self):
connection = Connection(self._get_storage())
root = connection.get_root()
root['a'] = Persistent()
root['b'] = Persistent()
connection.commit()
index = get_reference_index(connection.get_storage())
assert index == {
int8_to_str(1): [int8_to_str(0)],
int8_to_str(2): [int8_to_str(0)]
}
census = get_census(connection.get_storage())
assert census == {
as_bytes('PersistentDict'): 1,
as_bytes('Persistent'): 2
}
references = list(
gen_referring_oid_record(connection.get_storage(), int8_to_str(1)))
assert references == [(int8_to_str(0),
connection.get_storage().load(int8_to_str(0)))]
class Fake(object):
pass
s = Fake()
s.__class__ = Storage
raises(RuntimeError, s.__init__)
raises(NotImplementedError, s.load, None)
raises(NotImplementedError, s.begin)
raises(NotImplementedError, s.store, None, None)
raises(NotImplementedError, s.end)
raises(NotImplementedError, s.sync)
g = s.gen_oid_record()
raises(NotImplementedError, next, g)
def check_accessors(self):
p=Persistent()
p._p_oid
assert p._p_format_oid() == 'None'
p._p_oid = 'aaaaaaaa'
assert p._p_format_oid() == '7016996765293437281'
p._p_oid = int8_to_str(1)
assert p._p_format_oid() == '1'
assert repr(p) == "<Persistent 1>"
def check_accessors(self):
p=Persistent()
p._p_oid
assert p._p_format_oid() == 'None'
p._p_oid = 'aaaaaaaa'
assert p._p_format_oid() == '7016996765293437281'
p._p_oid = int8_to_str(1)
assert p._p_format_oid() == '1'
assert repr(p) == "<Persistent 1>"
def load(self, oid):
"""(str) -> str
Return object record identified by 'oid'.
"""
c = self._conn.cursor()
c.execute('SELECT id, data, refs FROM objects WHERE id = ?',
(str_to_int8(oid),))
v = c.fetchone()
if v is None:
raise KeyError(oid)
return pack_record(int8_to_str(v[0]), v[1], v[2])
def a(self):
f = File(prefix='shelftest')
name = f.get_name()
f.close()
s = FileStorage(name)
c = Connection(s)
r = c.get_root()
for x in range(10):
r["a%s" % x] = Persistent()
c.commit()
deleted_oids = [
r['a0']._p_oid, r['a2']._p_oid, r['a7']._p_oid, r['a8']._p_oid
]
del r['a0']
del r['a2']
del r['a7']
del r['a8']
c.commit()
c.pack()
c.abort()
assert c.get(deleted_oids[0])._p_is_ghost()
assert c.get(deleted_oids[1])._p_is_ghost()
raises(KeyError, getattr, c.get(deleted_oids[0]), 'a')
assert len([repr(oid) for oid, record in s.gen_oid_record()]) == 7
c.commit()
c.pack()
new_oid = s.new_oid()
assert new_oid == deleted_oids[-1], (new_oid, deleted_oids)
new_oid = s.new_oid()
assert new_oid == deleted_oids[-2], (new_oid, deleted_oids)
new_oid = s.new_oid()
assert new_oid == deleted_oids[-3], (new_oid, deleted_oids)
new_oid = s.new_oid()
assert new_oid == deleted_oids[-4], (new_oid, deleted_oids)
new_oid = s.new_oid()
assert new_oid == int8_to_str(11), repr(new_oid)
new_oid = s.new_oid()
assert new_oid == int8_to_str(12), repr(new_oid)
def c(self):
f = File(prefix='shelftest')
name = f.get_name()
f.close()
s = FileStorage(name)
c = Connection(s)
r = c.get_root()
for x in range(10):
r["a%s" % x] = Persistent()
c.commit()
deleted_oid = r['a9']._p_oid
del r['a9']
c.commit()
c.pack()
c.abort()
r.clear()
c.commit()
c.pack()
c.abort()
new_oid = s.new_oid()
assert new_oid == int8_to_str(1), repr(new_oid)
new_oid = s.new_oid()
assert new_oid == int8_to_str(2), repr(new_oid)
def c(self):
f = File(prefix='shelftest')
name = f.get_name()
f.close()
s = FileStorage(name)
c = Connection(s)
r = c.get_root()
for x in range(10):
r["a%s" % x] = Persistent()
c.commit()
deleted_oid = r['a9']._p_oid
del r['a9']
c.commit()
c.pack()
c.abort()
r.clear()
c.commit()
c.pack()
c.abort()
new_oid = s.new_oid()
assert new_oid == int8_to_str(1), repr(new_oid)
new_oid = s.new_oid()
assert new_oid == int8_to_str(2), repr(new_oid)
def a(self):
f = File(prefix='shelftest')
name = f.get_name()
f.close()
s = FileStorage(name)
c = Connection(s)
r = c.get_root()
for x in range(10):
r["a%s" % x] = Persistent()
c.commit()
deleted_oids = [
r['a0']._p_oid, r['a2']._p_oid, r['a7']._p_oid, r['a8']._p_oid]
del r['a0']
del r['a2']
del r['a7']
del r['a8']
c.commit()
c.pack()
c.abort()
assert c.get(deleted_oids[0])._p_is_ghost()
assert c.get(deleted_oids[1])._p_is_ghost()
raises(ReadConflictError, getattr, c.get(deleted_oids[0]), 'a')
assert len([repr(oid) for oid, record in s.gen_oid_record()]) == 7
c.commit()
c.pack()
new_oid = s.new_oid()
assert new_oid == deleted_oids[-1], (new_oid, deleted_oids)
new_oid = s.new_oid()
assert new_oid == deleted_oids[-2], (new_oid, deleted_oids)
new_oid = s.new_oid()
assert new_oid == deleted_oids[-3], (new_oid, deleted_oids)
new_oid = s.new_oid()
assert new_oid == deleted_oids[-4], (new_oid, deleted_oids)
new_oid = s.new_oid()
assert new_oid == int8_to_str(11), repr(new_oid)
new_oid = s.new_oid()
assert new_oid == int8_to_str(12), repr(new_oid)
def b(self):
f = File(prefix='shelftest')
name = f.get_name()
f.close()
s = FileStorage(name)
c = Connection(s)
r = c.get_root()
for x in range(10):
r["a%s" % x] = Persistent()
c.commit()
deleted_oid = r['a9']._p_oid
del r['a9']
c.commit()
c.pack()
c.abort()
assert len([repr(oid) for oid, record in s.gen_oid_record()]) == 10
new_oid = s.new_oid()
assert new_oid == deleted_oid
new_oid = s.new_oid()
assert new_oid == int8_to_str(11)
def b(self):
f = File(prefix='shelftest')
name = f.get_name()
f.close()
s = FileStorage(name)
c = Connection(s)
r = c.get_root()
for x in range(10):
r["a%s" % x] = Persistent()
c.commit()
deleted_oid = r['a9']._p_oid
del r['a9']
c.commit()
c.pack()
c.abort()
assert len([repr(oid) for oid, record in s.gen_oid_record()]) == 10
new_oid = s.new_oid()
assert new_oid == deleted_oid
new_oid = s.new_oid()
assert new_oid == int8_to_str(11)
def get(self, oid):
"""(oid:str|int|long) -> PersistentObject | None
Return object for `oid`.
The object may be a ghost.
"""
if not isinstance(oid, byte_string):
oid = int8_to_str(oid)
obj = self.cache.get(oid)
if obj is not None:
return obj
try:
data = self.get_stored_pickle(oid)
except KeyError:
return None
klass = loads(data)
obj = self.cache.get_instance(oid, klass, self)
state = self.reader.get_state(data, load=True)
obj.__setstate__(state)
obj._p_set_status_saved()
return obj
def get(self, oid):
"""(oid:str|int|long) -> PersistentObject | None
Return object for `oid`.
The object may be a ghost.
"""
if not isinstance(oid, byte_string):
oid = int8_to_str(oid)
obj = self.cache.get(oid)
if obj is not None:
return obj
try:
data = self.get_stored_pickle(oid)
except KeyError:
return None
klass = loads(data)
obj = self.cache.get_instance(oid, klass, self)
state = self.reader.get_state(data, load=True)
obj.__setstate__(state)
obj._p_set_status_saved()
return obj
def e(self):
f = File()
n1 = int8_to_str(0)
n2 = int8_to_str(1)
s = Shelf(f, items=[(n1, 'record1'), (n2, 'record2')])
def test_e(self):
f = File()
n1 = int8_to_str(0)
n2 = int8_to_str(1)
s = Shelf(f, items=[(n1, 'record1'), (n2, 'record2')])
def check_client_storage(self):
b = ClientStorage(address=self.address)
c = ClientStorage(address=self.address)
oid = b.new_oid()
assert oid == int8_to_str(0), repr(oid)
oid = b.new_oid()
assert oid == int8_to_str(1), repr(oid)
oid = b.new_oid()
assert oid == int8_to_str(2), repr(oid)
raises(KeyError, b.load, int8_to_str(0))
record = pack_record(int8_to_str(0), as_bytes('ok'), as_bytes(''))
b.begin()
b.store(int8_to_str(0), record)
assert b.end() is None
b.load(int8_to_str(0))
assert b.sync() == []
b.begin()
b.store(
int8_to_str(1),
pack_record(int8_to_str(1), as_bytes('no'), as_bytes('')))
b.end()
assert len(list(b.gen_oid_record())) == 1
records = b.bulk_load([int8_to_str(0), int8_to_str(1)])
assert len(list(records)) == 2
records = b.bulk_load([int8_to_str(0), int8_to_str(1), int8_to_str(2)])
raises(DurusKeyError, list, records)
b.pack()
assert len(list(b.gen_oid_record())) == 1
raises(ReadConflictError, c.load, int8_to_str(0))
raises(ReadConflictError, c.load, int8_to_str(0))
assert set(c.sync()) == set([int8_to_str(0), int8_to_str(1)])
assert record == c.load(int8_to_str(0))
b.close()
c.close()
def load_protocol_error(self):
s1 = ClientStorage(address=self.address)
c1 = Connection(s1)
s1.s = FakeSocket('?')
raises(ProtocolError, s1.load, int8_to_str(0))
from durus.error import ConflictError, WriteConflictError, ReadConflictError
from durus.error import DurusKeyError
from durus.logger import log
from durus.persistent import ConnectionBase, GHOST
from durus.persistent_dict import PersistentDict
from durus.serialize import ObjectReader, ObjectWriter
from durus.serialize import unpack_record, pack_record
from durus.utils import int8_to_str, iteritems, loads, byte_string, as_bytes
from heapq import heappush, heappop
from itertools import islice, chain
from os import getpid
from time import time
from weakref import ref, KeyedRef
import durus.storage
ROOT_OID = int8_to_str(0)
class Connection(ConnectionBase):
"""
The Connection manages movement of objects in and out of storage.
Instance attributes:
storage: Storage
cache: Cache
reader: ObjectReader
changed: {oid:str : PersistentObject}
invalid_oids: set([str])
Set of oids of objects known to have obsolete state.
transaction_serial: int
Number of calls to commit() or abort() since this instance was created.
def check_int8_to_str_str_to_int8(self):
for x in range(3):
assert len(int8_to_str(x)) == 8
assert str_to_int8(int8_to_str(x)) == x
def _gen_records(self):
c = self._conn.cursor()
c.execute('SELECT (id, data, refs) FROM objects ORDER BY id')
for oid, data, refs in c.fetchall():
yield int8_to_str(oid), pack_record(oid, data, refs)
def new_oid(self):
oid = int8_to_str(self._last_oid)
self._last_oid += 1
return oid
def check_memory_storage(self):
b = MemoryStorage()
assert b.new_oid() == int8_to_str(0)
assert b.new_oid() == int8_to_str(1)
assert b.new_oid() == int8_to_str(2)
raises(KeyError, b.load, int8_to_str(0))
record = pack_record(int8_to_str(0), as_bytes('ok'), as_bytes(''))
b.begin()
b.store(int8_to_str(0), record)
b.end()
b.sync()
b.begin()
b.store(
int8_to_str(1),
pack_record(int8_to_str(1), as_bytes('no'), as_bytes('')))
b.end()
assert len(list(b.gen_oid_record())) == 1
assert record == b.load(int8_to_str(0))
records = b.bulk_load([int8_to_str(0), int8_to_str(1)])
assert len(list(records)) == 2
records = b.bulk_load([int8_to_str(0), int8_to_str(1), int8_to_str(2)])
raises(KeyError, list, records)
from durus.error import ConflictError, WriteConflictError, ReadConflictError
from durus.error import DurusKeyError
from durus.logger import log
from durus.persistent import ConnectionBase, GHOST
from durus.persistent_dict import PersistentDict
from durus.serialize import ObjectReader, ObjectWriter
from durus.serialize import unpack_record, pack_record
from durus.utils import int8_to_str, iteritems, loads, byte_string, as_bytes
from heapq import heappush, heappop
from itertools import islice, chain
from os import getpid
from time import time
from weakref import ref, KeyedRef
import durus.storage
ROOT_OID = int8_to_str(0)
class Connection (ConnectionBase):
"""
The Connection manages movement of objects in and out of storage.
Instance attributes:
storage: Storage
cache: Cache
reader: ObjectReader
changed: {oid:str : PersistentObject}
invalid_oids: set([str])
Set of oids of objects known to have obsolete state.
transaction_serial: int
Number of calls to commit() or abort() since this instance was created.
This is used to maintain consistency, and to implement LRU replacement
def new_oid(self):
self.oid += 1
return int8_to_str(self.oid)
def _list_all_oids(self):
c = self._conn.cursor()
c.execute('SELECT id FROM objects ORDER BY id')
for oid, in c.fetchall():
yield int8_to_str(oid)
