class DBWriter(threading.Thread):
def __init__(self, path, f_len):
threading.Thread.__init__(self)
self.path = path
if os.path.exists(self.path):
os.remove(self.path)
open(self.path, 'w').close()
self.f_len = f_len
print 'simulating data block with size = %s ...' % f_len
self.db = None
self.checksum = hashlib.sha1()
def run(self):
self.db = DataBlock(self.path) # self.f_len)
f_len = self.f_len
parts = random.randint(1, 11)
for i in xrange(parts):
data = ''.join(
random.choice(string.letters) for i in xrange(f_len / parts))
self.checksum.update(data)
self.db.write(data)
time.sleep(.1)
rest = f_len - (f_len / parts) * parts
if rest:
data = ''.join(random.choice(string.letters) for i in xrange(rest))
self.checksum.update(data)
self.db.write(data)
self.db.finalize()
self.db.close()
def get_checksum(self):
return self.checksum.hexdigest()
class DBWriter(threading.Thread):
def __init__(self, path, f_len):
threading.Thread.__init__(self)
self.path = path
if os.path.exists(self.path):
os.remove(self.path)
open(self.path, 'w').close()
self.f_len = f_len
print 'simulating data block with size = %s ...'%f_len
self.db = None
self.checksum = hashlib.sha1()
def run(self):
self.db = DataBlock(self.path)# self.f_len)
f_len = self.f_len
parts = random.randint(1,11)
for i in xrange(parts):
data = ''.join(random.choice(string.letters) for i in xrange(f_len/parts))
self.checksum.update(data)
self.db.write(data)
time.sleep(.1)
rest = f_len - (f_len/parts)*parts
if rest:
data = ''.join(random.choice(string.letters) for i in xrange(rest))
self.checksum.update(data)
self.db.write(data)
self.db.finalize()
self.db.close()
def get_checksum(self):
return self.checksum.hexdigest()
class DBReader(threading.Thread):
def __init__(self, path, f_len):
threading.Thread.__init__(self)
self.path = path
self.f_len = f_len
self.checksum = hashlib.sha1()
def run(self):
try:
self.db = DataBlock(self.path, self.f_len)
while True:
data = self.db.read(1000)
if not data:
break
self.checksum.update(data)
self.db.close()
os.remove(self.path)
except Exception, err:
print 'ERROR: %s'%err
class DBReader(threading.Thread):
def __init__(self, path, f_len):
threading.Thread.__init__(self)
self.path = path
self.f_len = f_len
self.checksum = hashlib.sha1()
def run(self):
try:
self.db = DataBlock(self.path, self.f_len)
while True:
data = self.db.read(1000)
if not data:
break
self.checksum.update(data)
self.db.close()
os.remove(self.path)
except Exception, err:
print 'ERROR: %s' % err
def test_data_block(self):
ks = FileBasedSecurityManager(CLIENT_KS_1024_PATH, PASSWD)
DataBlock.SECURITY_MANAGER = ks
DB_PATH = tmp('test_data_block.kst')
DATA_LEN = 10
if os.path.exists(DB_PATH):
os.remove(DB_PATH)
db = DataBlock(DB_PATH, DATA_LEN, force_create=True)
checksum = hashlib.sha1()
for i in xrange(DATA_LEN / 10):
data = ''.join(
random.choice(string.letters)
for i in xrange(DATA_LEN / (DATA_LEN / 10)))
checksum.update(data)
db.write(data)
db.close()
db.close() #should be OK
or_checksum = checksum.hexdigest()
enc_checksum = db.checksum()
db = DataBlock(DB_PATH, DATA_LEN)
ret_data = ''
checksum = hashlib.sha1()
while True:
data = db.read(100)
if not data:
break
ret_data += data
checksum.update(data)
self.assertEqual(or_checksum, checksum.hexdigest())
self.assertEqual(db.checksum(), enc_checksum)
db = DataBlock(DB_PATH, DATA_LEN)
raw = db.read_raw()
self.assertEqual(db.checksum(), enc_checksum)
db = DataBlock(DB_PATH, DATA_LEN)
raw = db.read()
self.assertEqual(ret_data, raw)
app_db = DataBlock(DB_PATH)
app_db.write('The end!')
app_db.finalize()
app_db.close()
db = DataBlock(DB_PATH, actsize=True)
raw = db.read()
self.assertEqual(ret_data + 'The end!', raw)
db.close()
def test_data_block(self):
ks = FileBasedSecurityManager(CLIENT_KS_1024_PATH, PASSWD)
DataBlock.SECURITY_MANAGER = ks
DB_PATH = tmp('test_data_block.kst')
DATA_LEN = 10
if os.path.exists(DB_PATH):
os.remove(DB_PATH)
db = DataBlock(DB_PATH, DATA_LEN, force_create=True)
checksum = hashlib.sha1()
for i in xrange(DATA_LEN/10):
data = ''.join(random.choice(string.letters) for i in xrange(DATA_LEN/(DATA_LEN/10)))
checksum.update(data)
db.write(data)
db.close()
db.close() #should be OK
or_checksum = checksum.hexdigest()
enc_checksum = db.checksum()
db = DataBlock(DB_PATH, DATA_LEN)
ret_data = ''
checksum = hashlib.sha1()
while True:
data = db.read(100)
if not data:
break
ret_data += data
checksum.update(data)
self.assertEqual(or_checksum, checksum.hexdigest())
self.assertEqual(db.checksum(), enc_checksum)
db = DataBlock(DB_PATH, DATA_LEN)
raw = db.read_raw()
self.assertEqual(db.checksum(), enc_checksum)
db = DataBlock(DB_PATH, DATA_LEN)
raw = db.read()
self.assertEqual(ret_data, raw)
app_db = DataBlock(DB_PATH)
app_db.write('The end!')
app_db.finalize()
app_db.close()
db = DataBlock(DB_PATH, actsize=True)
raw = db.read()
self.assertEqual(ret_data+'The end!', raw)
db.close()
class Journal:
# journal statuses
JS_SYNC = 0
JS_NOT_SYNC = 1
JS_NOT_INIT = 2
JS_SYNC_FAILED = 3
# types of operations for journaling
OT_APPEND = 1
OT_UPDATE = 2
OT_REMOVE = 3
RECORD_STRUCT = "<IBQ"
RECORD_STRUCT_SIZE = struct.calcsize(RECORD_STRUCT)
def __init__(self, journal_key, journal_path, fabnet_gateway):
self.__journal_key = journal_key
self.__journal_path = journal_path
self.__journal = DataBlock(self.__journal_path, force_create=True)
self.__fabnet_gateway = fabnet_gateway
self.__last_record_id = 0
self.__no_foreign = True
self.__is_sync = False
self.__sync_failed = False
self.__j_sync_thrd = JournalSyncThread(self)
self.__j_sync_thrd.start()
def get_journal_key(self):
return self.__journal_key
def __recv_journal(self):
self.__journal.remove()
self.__journal = DataBlock(self.__journal_path, force_create=True)
is_recv = self.__fabnet_gateway.get(self.__journal_key, 2, self.__journal)
if is_recv:
self.__no_foreign = False
self.__is_sync = True
self.__journal.close() # next __journal.write reopen data block
events_provider.info("journal", "Journal is received from NimbusFS backend")
else:
events_provider.warning("journal", "Can't receive journal from NimbusFS backend")
self.__no_foreign = True
def close(self):
self.__journal.close()
self.__j_sync_thrd.stop()
@JLock
def synchronized(self):
return self.__is_sync
@JLock
def status(self):
if self.__sync_failed:
return self.JS_SYNC_FAILED
if self.__no_foreign:
return self.JS_NOT_INIT
if not self.__is_sync:
return self.JS_NOT_SYNC
return self.JS_SYNC
@JLock
def _synchronize(self):
try:
logger.debug("synchronizing journal...")
self.__journal.flush()
j_data = DataBlock(self.__journal_path, actsize=True)
is_send = self.__fabnet_gateway.put(j_data, key=self.__journal_key)
if is_send:
self.__is_sync = True
self.__sync_failed = False
except Exception, err:
self.__sync_failed = True
raise err
class Journal:
#journal statuses
JS_SYNC = 0
JS_NOT_SYNC = 1
JS_NOT_INIT = 2
JS_SYNC_FAILED = 3
#types of operations for journaling
OT_APPEND = 1
OT_UPDATE = 2
OT_REMOVE = 3
RECORD_STRUCT = '<IBQ'
RECORD_STRUCT_SIZE = struct.calcsize(RECORD_STRUCT)
def __init__(self, journal_key, journal_path, fabnet_gateway):
self.__journal_key = journal_key
self.__journal_path = journal_path
self.__journal = DataBlock(self.__journal_path, force_create=True)
self.__fabnet_gateway = fabnet_gateway
self.__last_record_id = 0
self.__no_foreign = True
self.__is_sync = False
self.__sync_failed = False
self.__j_sync_thrd = JournalSyncThread(self)
self.__j_sync_thrd.start()
def get_journal_key(self):
return self.__journal_key
def __recv_journal(self):
self.__journal.remove()
self.__journal = DataBlock(self.__journal_path, force_create=True)
is_recv = self.__fabnet_gateway.get(self.__journal_key, 2,
self.__journal)
if is_recv:
self.__no_foreign = False
self.__is_sync = True
self.__journal.close() #next __journal.write reopen data block
events_provider.info("journal",
"Journal is received from NimbusFS backend")
else:
events_provider.warning(
"journal", "Can't receive journal from NimbusFS backend")
self.__no_foreign = True
def close(self):
self.__journal.close()
self.__j_sync_thrd.stop()
@JLock
def synchronized(self):
return self.__is_sync
@JLock
def status(self):
if self.__sync_failed:
return self.JS_SYNC_FAILED
if self.__no_foreign:
return self.JS_NOT_INIT
if not self.__is_sync:
return self.JS_NOT_SYNC
return self.JS_SYNC
@JLock
def _synchronize(self):
try:
logger.debug('synchronizing journal...')
self.__journal.flush()
j_data = DataBlock(self.__journal_path, actsize=True)
is_send = self.__fabnet_gateway.put(j_data, key=self.__journal_key)
if is_send:
self.__is_sync = True
self.__sync_failed = False
except Exception, err:
self.__sync_failed = True
raise err
