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
