def _init_db_environment(self, homeDir, create=True):
#NOTE: The identifier is appended to the path as the location for the db
#This provides proper isolation for stores which have the same path but different identifiers
if SUPPORT_MULTIPLE_STORE_ENVIRON:
fullDir = join(homeDir, self.identifier)
else:
fullDir = homeDir
envsetflags = db.DB_CDB_ALLDB
envflags = db.DB_INIT_MPOOL | db.DB_INIT_LOCK | db.DB_THREAD | db.DB_INIT_TXN | db.DB_RECOVER
if not exists(fullDir):
if create == True:
makedirs(fullDir)
self.create(path)
else:
return NO_STORE
db_env = db.DBEnv()
db_env.set_cachesize(0, 1024 * 1024 * 50) # TODO
# enable deadlock-detection
db_env.set_lk_detect(db.DB_LOCK_MAXLOCKS)
# increase the number of locks, this is correlated to the size (num triples) that
# can be added/removed with a single transaction
db_env.set_lk_max_locks(self.__locks)
db_env.set_lk_max_lockers(self.__locks)
db_env.set_lk_max_objects(self.__locks)
#db_env.set_lg_max(1024*1024)
#db_env.set_flags(envsetflags, 1)
db_env.open(fullDir, envflags | db.DB_CREATE, 0)
return db_env
def _environment_init(cls):
"""
Configures and opens the handle for the underlying DB environment
:return:
"""
# Create the DB home directory, if necessary.
home = cls.DB_HOME
if not os.path.exists(os.path.dirname(home)):
try:
os.makedirs(os.path.dirname(home))
except OSError as exc: # Guard against race condition
if exc.errno != errno.EEXIST:
raise
e = db.DBEnv()
e.set_tx_max(1000)
e.set_lk_max_lockers(2000)
e.set_lk_max_locks(2000)
e.set_lk_max_objects(2000)
e.set_flags(db.DB_TXN_NOSYNC, True)
e.open(
home, db.DB_INIT_TXN | db.DB_PRIVATE | db.DB_CREATE | db.DB_THREAD
| db.DB_INIT_LOCK | db.DB_INIT_MPOOL, 0660)
cls.env = e
class BaseThreadedTestCase(unittest.TestCase):
dbtype = db.DB_UNKNOWN # must be set in derived class
dbopenflags = 0
dbsetflags = 0
envflags = 0
def setUp(self):
if verbose:
dbutils._deadlock_VerboseFile = sys.stdout
homeDir = os.path.join(os.path.dirname(sys.argv[0]), 'db_home')
self.homeDir = homeDir
try:
os.mkdir(homeDir)
except OSError, e:
if e.errno <> errno.EEXIST: raise
self.env = db.DBEnv()
self.setEnvOpts()
self.env.open(homeDir, self.envflags | db.DB_CREATE)
self.filename = self.__class__.__name__ + '.db'
self.d = db.DB(self.env)
if self.dbsetflags:
self.d.set_flags(self.dbsetflags)
self.d.open(self.filename, self.dbtype,
self.dbopenflags | db.DB_CREATE)
def setUp(self):
homeDir = os.path.join(os.path.dirname(sys.argv[0]), 'db_home')
self.homeDir = homeDir
try: os.mkdir(homeDir)
except os.error: pass
self.env = db.DBEnv()
self.env.open(homeDir, db.DB_THREAD | db.DB_INIT_MPOOL |
db.DB_INIT_LOCK | db.DB_CREATE)
def setUp(self):
self.filename = self.__class__.__name__ + '.db'
homeDir = os.path.join(os.path.dirname(sys.argv[0]), 'db_home')
self.homeDir = homeDir
try: os.mkdir(homeDir)
except os.error: pass
self.env = db.DBEnv()
self.env.open(homeDir, db.DB_CREATE | db.DB_INIT_MPOOL | db.DB_INIT_LOCK )
def do_open(self):
self.homeDir = homeDir = os.path.join(
os.path.dirname(sys.argv[0]), 'db_home')
try: os.mkdir(homeDir)
except os.error: pass
self.env = db.DBEnv()
self.env.open(homeDir, self.envflags | db.DB_INIT_MPOOL | db.DB_CREATE)
self.filename = os.path.split(self.filename)[1]
self.d = dbshelve.DBShelf(self.env)
self.d.open(self.filename, self.dbtype, self.dbflags)
def __init__(self, repoDir, readOnly=True):
self.readOnly = readOnly
if readOnly:
envFlags = bdb.DB_INIT_MPOOL
self.dbFlags = bdb.DB_RDONLY
else:
envFlags = bdb.DB_CREATE | bdb.DB_INIT_TXN | bdb.DB_INIT_MPOOL | \
bdb.DB_INIT_LOCK | bdb.DB_INIT_LOG # | bdb.DB_RECOVER_FATAL
self.dbFlags = bdb.DB_CREATE | bdb.DB_READ_UNCOMMITTED | bdb.DB_AUTO_COMMIT
localDbFlags = self.dbFlags
self.env = bdb.DBEnv(0)
# set size of locking filesystem
self.env.set_lk_max_objects(100000)
self.env.set_lk_max_locks(100000)
# set size of logging manager
self.env.set_lg_regionmax(1 << 20)
# open the environment
#self.env.remove(repoDir)
self.env.open(repoDir, envFlags)
# Lazy syncing should improve the throughput
#self.env.set_flags(bdb.DB_TXN_NOSYNC, 1)
self._experimentDb = bdb.DB(self.env)
self._experimentDb.open("experiments.db",
dbtype=bdb.DB_HASH,
flags=localDbFlags)
self._requiredCountDb = bdb.DB(self.env)
self._requiredCountDb.open("requiredCount.db",
dbtype=bdb.DB_HASH,
flags=localDbFlags)
self._resultCountDb = bdb.DB(self.env)
self._resultCountDb.open("resultCount.db",
dbtype=bdb.DB_HASH,
flags=localDbFlags)
self._bundleIdsDb = bdb.DB(self.env)
self._bundleIdsDb.open("bundleIds.db",
dbtype=bdb.DB_HASH,
flags=localDbFlags)
# make the directory where results will be stored
try:
os.mkdir(os.path.join(repoDir, 'results'))
except:
# already exists? anyway, we'll get an error later
pass
if self.readOnly:
self.txn = None
else:
self.txn = self.env.txn_begin()
def open(self):
if self.__shelf is not None:
return
log.debug("Opening state database...")
self.__flags = db.DB_PRIVATE | db.DB_CREATE | db.DB_THREAD \
| db.DB_INIT_LOCK | db.DB_INIT_MPOOL
self.__env = env = db.DBEnv()
env.open(self.__config.appdata_dir, self.__flags)
self.__shelf = dbshelve.open(self.__config.state_db_file,
'c',
dbenv=env)
log.debug("State database opened with %d entries.", len(self.keys()))
def _init_db_environment(self, homeDir, create=True):
if not exists(homeDir):
if create==True:
mkdir(homeDir) # TODO: implement create method and refactor this to it
self.create(homeDir)
else:
return NO_STORE
db_env = db.DBEnv()
db_env.set_cachesize(0, CACHESIZE) # TODO
#db_env.set_lg_max(1024*1024)
db_env.set_flags(ENVSETFLAGS, 1)
db_env.open(homeDir, ENVFLAGS | db.DB_CREATE)
return db_env
def destroy(self, configuration):
"""
Destroy the underlying bsddb persistence for this store
"""
if SUPPORT_MULTIPLE_STORE_ENVIRON:
fullDir = join(configuration,self.identifier)
else:
fullDir = configuration
if exists(configuration):
#From bsddb docs:
#A DB_ENV handle that has already been used to open an environment
#should not be used to call the DB_ENV->remove function; a new DB_ENV handle should be created for that purpose.
self.close()
db.DBEnv().remove(fullDir,db.DB_FORCE)
def open(self):
if self.__shelf is not None:
return
history_dir = os.path.join(self.__config.appdata_dir, "history")
if not os.path.exists(history_dir):
self.info("Creating history dir %s", history_dir)
os.mkdir(history_dir)
self.debug("Opening history database...")
self.__flags = db.DB_PRIVATE | db.DB_CREATE | db.DB_THREAD \
| db.DB_INIT_LOCK | db.DB_INIT_MPOOL
self.__env = env = db.DBEnv()
env.open(history_dir, self.__flags)
self.__shelf = dbshelve.open("history.db", 'c', dbenv=env)
self.debug("History database opened with %d entries.",
len(self.keys()))
def getDbEnv():
tl = threading.local()
if not hasattr(tl, 'db_env'):
tl.db_env = db.DBEnv()
tl.db_env.open(
PROJECT_DATA_ROOT, db.DB_INIT_MPOOL | db.DB_INIT_LOCK
| db.DB_INIT_LOG | db.DB_REGISTER | db.DB_RECOVER | db.DB_INIT_TXN
| db.DB_CHKSUM | db.DB_THREAD | db.DB_CREATE)
#Use the following if you get errors about db.DB_REGISTER
#tl.db_env.open( PROJECT_DATA_ROOT,
# db.DB_INIT_MPOOL|db.DB_INIT_LOCK|db.DB_INIT_LOG|
# db.DB_INIT_TXN|db.DB_CHKSUM|db.DB_THREAD|db.DB_CREATE )
tl.db_env.set_timeout(16384, db.DB_SET_LOCK_TIMEOUT)
tl.db_env.set_timeout(16384, db.DB_SET_TXN_TIMEOUT)
return tl.db_env
def _init_db_environment(self, homeDir, create=True):
envsetflags = db.DB_CDB_ALLDB
envflags = db.DB_INIT_MPOOL | db.DB_INIT_CDB | db.DB_THREAD
if not exists(homeDir):
if create==True:
mkdir(homeDir) # TODO: implement create method and refactor this to it
self.create(homeDir)
else:
return NO_STORE
db_env = db.DBEnv()
db_env.set_cachesize(0, 1024*1024*50) # TODO
#db_env.set_lg_max(1024*1024)
db_env.set_flags(envsetflags, 1)
db_env.open(homeDir, envflags | db.DB_CREATE)
return db_env
def setUp(self):
self._tmpdir = tempfile.mkdtemp()
self.full_name = os.path.join(self._tmpdir, 'test.grdb')
self.env = db.DBEnv()
self.env.set_cachesize(0, 0x2000000)
self.env.set_lk_max_locks(25000)
self.env.set_lk_max_objects(25000)
self.env.set_flags(db.DB_LOG_AUTOREMOVE, 1) # clean up unused logs
# The DB_PRIVATE flag must go if we ever move to multi-user setup
env_flags = db.DB_CREATE|db.DB_RECOVER|db.DB_PRIVATE|\
db.DB_INIT_MPOOL|db.DB_INIT_LOCK|\
db.DB_INIT_LOG|db.DB_INIT_TXN
env_name = "%s/env" % (self._tmpdir, )
if not os.path.isdir(env_name):
os.mkdir(env_name)
self.env.open(env_name, env_flags)
(self.person_map, self.surnames) = self._open_tables()
def open_db(filename, db_dir='', filetype=db.DB_BTREE, writeback=False):
global home_dir
if not db_dir:
db_dir = home_dir
dir = setDBPath(db_dir)
path = os.path.join(dir, filename)
env = db.DBEnv()
# Concurrent Data Store
env.open(
dir, db.DB_THREAD | db.DB_INIT_CDB | db.DB_INIT_MPOOL | db.DB_CREATE
| db.DB_PRIVATE)
#d = db.DB(env)
#d.open(path, filetype, db.DB_THREAD|db.DB_CREATE)
#_db = BsdDbShelf(d, writeback=writeback)
_db = dbshelve.open(filename,
flags=db.DB_THREAD | db.DB_CREATE,
filetype=filetype,
dbenv=env)
return _db, dir
def Open(self, create_if_necessary=False):
# XXX: Make sure this is the correct way to do this.
if not os.path.isdir(self._db_root) and create_if_necessary:
os.mkdir(self._db_root)
if type(self._dbenv) != "DBEnv":
self._dbenv = bdb.DBEnv()
self._dbenv.set_cachesize(0, 20<<20)
flags = bdb.DB_INIT_LOCK | bdb.DB_INIT_MPOOL \
| (create_if_necessary and bdb.DB_CREATE)
self._dbenv.open(self._db_root, flags)
if create_if_necessary:
self._CreateBDB()
self._OpenBDB()
if self.use_key_db:
self._CreateKeyDB(create_if_necessary)
def listKeys():
from bsddb import db
import settings
db_env = db.DBEnv()
# Open the Database, use TXN
# Not supported in BDB 4.5ish.
#db_env.open(PROJECT_DATA_ROOT+"/data", db.DB_REGISTER|db.DB_CREATE|db.DB_RECOVER|db.DB_INIT_MPOOL|db.DB_INIT_LOCK|db.DB_INIT_LOG|db.DB_INIT_TXN|db.DB_CHKSUM)
db_env.open(
settings.BDB_PATH, db.DB_CREATE | db.DB_RECOVER | db.DB_INIT_MPOOL
| db.DB_INIT_LOCK | db.DB_INIT_LOG | db.DB_INIT_TXN | db.DB_CHKSUM)
db_env.set_timeout(16384, db.DB_SET_LOCK_TIMEOUT)
db_env.set_timeout(16384, db.DB_SET_TXN_TIMEOUT)
bdb = db.DB(db_env)
bdb.open(settings.BDB_NAME, settings.BDB_PATH)
keys = bdb.keys()
keys.sort()
print "Keys:", keys
bdb.close()
db_env.close()
def test02_close_dbenv_delete_db_success(self):
dbenv = db.DBEnv()
dbenv.open(self.homeDir,
db.DB_INIT_CDB| db.DB_CREATE |db.DB_THREAD|db.DB_INIT_MPOOL,
0666)
d = db.DB(dbenv)
d.open(self.filename, db.DB_BTREE, db.DB_CREATE | db.DB_THREAD, 0666)
try:
dbenv.close()
except db.DBError:
pass # good, it should raise an exception
del d
try:
import gc
except ImportError:
gc = None
if gc:
# force d.__del__ [DB_dealloc] to be called
gc.collect()
def setUp(self):
if self.useEnv:
homeDir = os.path.join(os.path.dirname(sys.argv[0]), 'db_home')
self.homeDir = homeDir
try:
shutil.rmtree(homeDir)
except OSError, e:
# unix returns ENOENT, windows returns ESRCH
if e.errno not in (errno.ENOENT, errno.ESRCH): raise
os.mkdir(homeDir)
try:
self.env = db.DBEnv()
self.env.set_lg_max(1024 * 1024)
self.env.set_flags(self.envsetflags, 1)
self.env.open(homeDir, self.envflags | db.DB_CREATE)
tempfile.tempdir = homeDir
self.filename = os.path.split(tempfile.mktemp())[1]
tempfile.tempdir = None
# Yes, a bare except is intended, since we're re-raising the exc.
except:
shutil.rmtree(homeDir)
raise
def test01_close_dbenv_before_db(self):
dbenv = db.DBEnv()
dbenv.open(self.homeDir,
db.DB_INIT_CDB| db.DB_CREATE |db.DB_THREAD|db.DB_INIT_MPOOL,
0666)
d = db.DB(dbenv)
d.open(self.filename, db.DB_BTREE, db.DB_CREATE | db.DB_THREAD, 0666)
try:
dbenv.close()
except db.DBError:
try:
d.close()
except db.DBError:
return
assert 0, \
"DB close did not raise an exception about its "\
"DBEnv being trashed"
# XXX This may fail when using older versions of BerkeleyDB.
# E.g. 3.2.9 never raised the exception.
assert 0, "dbenv did not raise an exception about its DB being open"
def _dump_bsddbm_for_unity(self, outfile, outdir):
""" write out the subset that unity needs of the REVIEW_STATS_CACHE
as a C friendly (using struct) bsddb
"""
env = bdb.DBEnv()
if not os.path.exists(outdir):
os.makedirs(outdir)
env.open(outdir,
bdb.DB_CREATE | bdb.DB_INIT_CDB | bdb.DB_INIT_MPOOL |
bdb.DB_NOMMAP, # be gentle on e.g. nfs mounts
0600)
db = bdb.DB(env)
db.open(outfile,
dbtype=bdb.DB_HASH,
mode=0600,
flags=bdb.DB_CREATE)
for (app, stats) in self.REVIEW_STATS_CACHE.iteritems():
# pkgname is ascii by policy, so its fine to use str() here
db[str(app.pkgname)] = struct.pack('iii',
stats.ratings_average or 0,
stats.ratings_total,
stats.dampened_rating)
db.close()
env.close()
def open(self, path, create=True):
homeDir = path
envsetflags = db.DB_CDB_ALLDB
envflags = db.DB_INIT_MPOOL | db.DB_INIT_CDB | db.DB_THREAD
if not exists(homeDir):
if create==True:
mkdir(homeDir) # TODO: implement create method and refactor this to it
self.create(path)
else:
return -1
if self.__identifier is None:
self.__identifier = URIRef(pathname2url(abspath(homeDir)))
self.db_env = db_env = db.DBEnv()
db_env.set_cachesize(0, 1024*1024*50) # TODO
#db_env.set_lg_max(1024*1024)
db_env.set_flags(envsetflags, 1)
db_env.open(homeDir, envflags | db.DB_CREATE)
self.__open = True
dbname = None
dbtype = db.DB_BTREE
dbopenflags = db.DB_THREAD
dbmode = 0660
dbsetflags = 0
# create and open the DBs
self.__indicies = [None,] * 3
self.__indicies_info = [None,] * 3
for i in xrange(0, 3):
index_name = to_key_func(i)(("s", "p", "o"), "c")
index = db.DB(db_env)
index.set_flags(dbsetflags)
index.open(index_name, dbname, dbtype, dbopenflags|db.DB_CREATE, dbmode)
self.__indicies[i] = index
self.__indicies_info[i] = (index, to_key_func(i), from_key_func(i))
lookup = {}
for i in xrange(0, 8):
results = []
for start in xrange(0, 3):
score = 1
len = 0
for j in xrange(start, start+3):
if i & (1<<(j%3)):
score = score << 1
len += 1
else:
break
tie_break = 2-start
results.append(((score, tie_break), start, len))
results.sort()
score, start, len = results[-1]
def get_prefix_func(start, end):
def get_prefix(triple, context):
if context is None:
yield ""
else:
yield context
i = start
while i<end:
yield triple[i%3]
i += 1
yield ""
return get_prefix
lookup[i] = (self.__indicies[start], get_prefix_func(start, start + len), from_key_func(start), results_from_key_func(start, self._from_string))
self.__lookup_dict = lookup
self.__contexts = db.DB(db_env)
self.__contexts.set_flags(dbsetflags)
self.__contexts.open("contexts", dbname, dbtype, dbopenflags|db.DB_CREATE, dbmode)
self.__namespace = db.DB(db_env)
self.__namespace.set_flags(dbsetflags)
self.__namespace.open("namespace", dbname, dbtype, dbopenflags|db.DB_CREATE, dbmode)
self.__prefix = db.DB(db_env)
self.__prefix.set_flags(dbsetflags)
self.__prefix.open("prefix", dbname, dbtype, dbopenflags|db.DB_CREATE, dbmode)
self.__k2i = db.DB(db_env)
self.__k2i.set_flags(dbsetflags)
self.__k2i.open("k2i", dbname, db.DB_HASH, dbopenflags|db.DB_CREATE, dbmode)
self.__i2k = db.DB(db_env)
self.__i2k.set_flags(dbsetflags)
self.__i2k.open("i2k", dbname, db.DB_RECNO, dbopenflags|db.DB_CREATE, dbmode)
self.__needs_sync = False
t = Thread(target=self.__sync_run)
t.setDaemon(True)
t.start()
self.__sync_thread = t
return 1
def __init__(self,
dbName,
load=False,
persistent=True,
dbenv=None,
rd_only=False,
cachesize=(0, 512)):
""" Common Constructor """
if dbName is None:
#Ok so we want a pure RAM-based DB, let's do it
self.pureRAM = True
load = False
persistent = False
else:
if os.path.exists(dbName) and not load:
os.remove(dbName)
self.db_name = dbName
if dbenv is not None:
self.dbObj = db.DB(dbenv)
else:
env = db.DBEnv()
# default cache size is 200Mbytes
env.set_cachesize(cachesize[0], cachesize[1] * 1024 * 1024, 0)
env_flags = db.DB_CREATE | db.DB_PRIVATE | db.DB_INIT_MPOOL #| db.DB_INIT_CDB | db.DB_THREAD
env.log_set_config(db.DB_LOG_IN_MEMORY, 1)
env.open(None, env_flags)
self.dbObj = db.DB(env)
self.opened = False
# allow multiple key entries
# TODO : mettre en DB_DUPSORT
self.dbObj.set_flags(db.DB_DUP | db.DB_DUPSORT)
# self.dbObj.set_flags(db.DB_DUP)
if not load:
try:
self.dbObj.open(self.db_name,
dbtype=db.DB_HASH,
flags=db.DB_CREATE)
self.opened = True
except:
raise IOError('Failed to create %s ' % self.db_name)
print "Created DB:", dbName
else:
if self.db_name is None:
raise ValueError('No Database name provided for loading')
if not os.path.exists(self.db_name):
self.dbObj.open(self.db_name,
dbtype=db.DB_HASH,
flags=db.DB_CREATE)
else:
if rd_only:
self.dbObj.open(dbName,
dbtype=db.DB_HASH,
flags=db.DB_RDONLY)
else:
self.dbObj.open(dbName, dbtype=db.DB_HASH)
self.opened = True
print "Loaded DB:", dbName
# keep in mind if the db is to be kept or destroy
self.persistent = persistent
# cursor object : might get instantiated later
self.cursor = None
def test02_db_home(self):
env = db.DBEnv()
# check for crash fixed when db_home is used before open()
assert env.db_home is None
env.open(self.homeDir, db.DB_CREATE)
assert self.homeDir == env.db_home
from src.classes.fingerprints import *
from src.classes.fingerprints.bench import *
from src.classes.fingerprints.cortico import *
from src.classes.fingerprints.cochleo import *
from src.classes.fingerprints.CQT import *
from src.tools.fgpt_tools import db_creation, db_test
from src.tools.fgpt_tools import get_filepaths
SKETCH_ROOT = os.environ['SKETCH_ROOT']
db_path = op.join(SKETCH_ROOT, 'fgpt_db')
score_path = op.join(SKETCH_ROOT, 'fgpt_scores')
SND_DB_PATH = os.environ['SND_DB_PATH']
import bsddb.db as db
env = db.DBEnv()
env.set_cachesize(0, 512 * 1024 * 1024, 0)
env_flags = db.DB_CREATE | db.DB_PRIVATE | db.DB_INIT_MPOOL #| db.DB_INIT_CDB | db.DB_THREAD
env.log_set_config(db.DB_LOG_IN_MEMORY, 1)
env.open(None, env_flags)
bases = {
'RWCLearn': (op.join(SND_DB_PATH, 'rwc/Learn/'), '.wav'),
'voxforge': (op.join(SND_DB_PATH, 'voxforge/main/'), 'wav'),
#'voxforge':(op.join(SND_DB_PATH,'voxforge/main/Learn/'),'wav'),
'GTZAN': (op.join(SND_DB_PATH, 'genres/'), '.au')
}
# The RWC subset path
#audio_path = '/sons/rwc/Learn'
set_id = 'GTZAN' # Choose a unique identifier for the dataset considered
def open(self, path, create=True):
if self.__open:
return
homeDir = path
#NOTE: The identifeir is appended to the path as the location for the db
#This provides proper isolation for stores which have the same path but different identifiers
if SUPPORT_MULTIPLE_STORE_ENVIRON:
fullDir = join(homeDir,self.identifier)
else:
fullDir = homeDir
envsetflags = db.DB_CDB_ALLDB
envflags = db.DB_INIT_MPOOL | db.DB_INIT_LOCK | db.DB_THREAD | db.DB_INIT_TXN | db.DB_RECOVER
if not exists(fullDir):
if create==True:
makedirs(fullDir)
self.create(path)
else:
return NO_STORE
if self.__identifier is None:
self.__identifier = URIRef(pathname2url(abspath(fullDir)))
self.db_env = db_env = db.DBEnv()
db_env.set_cachesize(0, 1024*1024*50) # TODO
#db_env.set_lg_max(1024*1024)
#db_env.set_flags(envsetflags, 1)
db_env.open(fullDir, envflags | db.DB_CREATE,0)
#Transaction object
self.dbTxn = db_env.txn_begin()
self.__open = True
dbname = None
dbtype = db.DB_BTREE
dbopenflags = db.DB_THREAD
dbmode = 0660
dbsetflags = 0
# create and open the DBs
self.__indicies = [None,] * 3
self.__indicies_info = [None,] * 3
for i in xrange(0, 3):
index_name = to_key_func(i)(("s", "p", "o"), "c")
index = db.DB(db_env)
index.set_flags(dbsetflags)
index.open(index_name, dbname, dbtype, dbopenflags|db.DB_CREATE, dbmode,txn=self.dbTxn)
self.__indicies[i] = index
self.__indicies_info[i] = (index, to_key_func(i), from_key_func(i))
lookup = {}
for i in xrange(0, 8):
results = []
for start in xrange(0, 3):
score = 1
len = 0
for j in xrange(start, start+3):
if i & (1<<(j%3)):
score = score << 1
len += 1
else:
break
tie_break = 2-start
results.append(((score, tie_break), start, len))
results.sort()
score, start, len = results[-1]
def get_prefix_func(start, end):
def get_prefix(triple, context):
if context is None:
yield ""
else:
yield context
i = start
while i<end:
yield triple[i%3]
i += 1
yield ""
return get_prefix
lookup[i] = (self.__indicies[start], get_prefix_func(start, start + len), from_key_func(start), results_from_key_func(start, self._from_string))
self.__lookup_dict = lookup
self.__contexts = db.DB(db_env)
self.__contexts.set_flags(dbsetflags)
self.__contexts.open("contexts", dbname, dbtype, dbopenflags|db.DB_CREATE, dbmode,txn=self.dbTxn)
self.__namespace = db.DB(db_env)
self.__namespace.set_flags(dbsetflags)
self.__namespace.open("namespace", dbname, dbtype, dbopenflags|db.DB_CREATE, dbmode,txn=self.dbTxn)
self.__prefix = db.DB(db_env)
self.__prefix.set_flags(dbsetflags)
self.__prefix.open("prefix", dbname, dbtype, dbopenflags|db.DB_CREATE, dbmode,txn=self.dbTxn)
self.__i2k = db.DB(db_env)
self.__i2k.set_flags(dbsetflags)
self.__i2k.open("i2k", dbname, db.DB_HASH, dbopenflags|db.DB_CREATE, dbmode,txn=self.dbTxn)
self.__needs_sync = False
t = Thread(target=self.__sync_run)
t.setDaemon(True)
t.start()
self.__sync_thread = t
return VALID_STORE
