def _openDBHash(filename,flag,mode=0666):
"""Open a Berkeley DB hash database. Equivalent to dbhash.open, but when
possible, reaches into bsddb.db and uses the DB_RECOVER* flag(s) to
handle possible corruption from crashing without closing the database.
"""
if 1:
#XXXX008 This function is borked. Fix it or remove it.
return anydbm.open(filename, flag, mode)
try:
import bsddb
except ImportError:
# Fallback to anydbm, which delegates to dbhash
return anydbm.open(filename, flag, mode)
# Adapted from bsddb.hashopen
e = bsddb.db.DBEnv(bsddb.db.DB_PRIVATE|
bsddb.db.DB_CREATE |
bsddb.db.DB_THREAD |
bsddb.db.DB_INIT_LOCK |
bsddb.db.DB_INIT_MPOOL | bsddb.db.DB_RECOVER )
flags = bsddb.db.DB_CREATE | bsddb.db.DB_THREAD
flags |= getattr(bsddb.db, "DB_AUTO_COMMIT", 0)
#flags |= getattr(bsddb.db, "DB_RECOVER", 0)
#flags |= getattr(bsddb.db, "DB_RECOVER_FATAL", 0)
d = bsddb.db.DB(e)
d.open(filename, bsddb.db.DB_HASH, flags, mode)
return bsddb._DBWithCursor(d)
def _openDBHash(filename, flag, mode=0666):
"""Open a Berkeley DB hash database. Equivalent to dbhash.open, but when
possible, reaches into bsddb.db and uses the DB_RECOVER* flag(s) to
handle possible corruption from crashing without closing the database.
"""
if 1:
#XXXX008 This function is borked. Fix it or remove it.
return anydbm.open(filename, flag, mode)
try:
import bsddb
except ImportError:
# Fallback to anydbm, which delegates to dbhash
return anydbm.open(filename, flag, mode)
# Adapted from bsddb.hashopen
e = bsddb.db.DBEnv(bsddb.db.DB_PRIVATE | bsddb.db.DB_CREATE
| bsddb.db.DB_THREAD | bsddb.db.DB_INIT_LOCK
| bsddb.db.DB_INIT_MPOOL | bsddb.db.DB_RECOVER)
flags = bsddb.db.DB_CREATE | bsddb.db.DB_THREAD
flags |= getattr(bsddb.db, "DB_AUTO_COMMIT", 0)
#flags |= getattr(bsddb.db, "DB_RECOVER", 0)
#flags |= getattr(bsddb.db, "DB_RECOVER_FATAL", 0)
d = bsddb.db.DB(e)
d.open(filename, bsddb.db.DB_HASH, flags, mode)
return bsddb._DBWithCursor(d)
'''
return '\0'.join(map(_to_safe_str, args))
def _btopen(env, file, flag='c', mode=0666,
btflags=0, cachesize=None, maxkeypage=None, minkeypage=None,
pgsize=None, lorder=None):
flags = bsddb.db.DB_CREATE # bsddb._checkflag(flag, file)
d = bsddb.db.DB(env)
if pgsize is not None: d.set_pagesize(pgsize)
if lorder is not None: d.set_lorder(lorder)
d.set_flags(btflags)
if minkeypage is not None: d.set_bt_minkey(minkeypage)
if maxkeypage is not None: d.set_bt_maxkey(maxkeypage)
d.open(file, dbtype=bsddb.db.DB_BTREE, flags=flags, mode=mode)
return bsddb._DBWithCursor(d)
class BdbStore(Model):
'''
datastore using Berkeley DB using Python's bsddb module
two b-tree databases with sorted duplicates
p o t => c s
s => p o t c
where
s subject
p predicate
