def read(self, record_num=128):
"""
load log into memory
:notice:
If skip_badlog is not True, will raise IOError if the stream
encounters any error.
Otherwise, the stream will skip the bad log file, move to next one
and continue reading
:return:
a. return a list of "record_num" of LogRecord.
b. If the count number of list is less than record_num,
it means the stream encounter EOF, plz read again afterwards.
c. If the returned is None, it means the stream got nothing, plz
try again.
"""
recordlist = []
count = 0
move2nextstream = False
while count < record_num:
ret, retval = self._try_read_one_log(self._load_stream)
if ret == LOGFILE_EOF:
# need read next log file
move2nextstream = True
elif ret == LOGFILE_GOOD:
recordlist.append(retval)
count += 1
continue
elif ret == LOGFILE_BAD_RECORD:
if not self._skip_badlog:
raise IOError('find bad records in {0}'.format(
self._load_stream.name))
else:
log.warn(
'Bad record! '
'But skip_badlog is on, will skip the file:{0}'.format(
self._load_stream.name))
move2nextstream = True
if move2nextstream:
move2nextstream = False
ret = self._move2next_load_fname()
if LOGFILE_EOF == ret:
log.debug('no more log edits to read, plz retry')
break
elif LOGFILE_GOOD == ret:
log.debug('moved to next log edit file, to read new log')
continue
elif LOGFILE_BAD_RECORD == ret:
log.error('IOError happended, read_logs failed')
if self._skip_badlog:
log.error('skip bad log is on, try moving to next one')
move2nextstream = True
continue
else:
raise IOError('encounter bad records, raise exception')
return recordlist
def purge_data(self, before_logid):
"""
log files which contains log (less than before_logid) will be purged.
"""
folder = self._get_storage_dir()
logfiles = self._get_ordered_logfiles(folder)
last_logid = None
last_fname = None
purge_list = []
for fname in logfiles:
if fname.find('writing') >= 0:
continue
current = int(fname.split('.')[-1])
if last_logid is not None and (current - 1) < before_logid:
purge_list.append(last_fname)
last_fname = fname
last_logid = current
log.info('log id < before_logid will be purged:purged:{0}'.format(
purge_list)
)
ind = 0
for fname in purge_list:
full = '{0}/{1}'.format(folder, fname)
log.info('to purge log file:{0}'.format(full))
try:
os.remove(full)
ind += 1
except StandardError as err:
log.error(
'failed to purge log file:{0}, {1}'.format(full, err)
)
if ind % 1000:
time.sleep(0.1)
def purge_data(self, before_logid):
"""
log files which contains log (less than before_logid) will be purged.
"""
folder = self._get_storage_dir()
logfiles = self._get_ordered_logfiles(folder)
last_logid = None
last_fname = None
purge_list = []
for fname in logfiles:
if fname.find('writing') >= 0:
continue
current = int(fname.split('.')[-1])
if last_logid is not None and (current - 1) < before_logid:
purge_list.append(last_fname)
last_fname = fname
last_logid = current
log.info('log id < before_logid will be purged:purged:{0}'.format(
purge_list))
ind = 0
for fname in purge_list:
full = '{0}/{1}'.format(folder, fname)
log.info('to purge log file:{0}'.format(full))
try:
os.remove(full)
ind += 1
except StandardError as err:
log.error('failed to purge log file:{0}, {1}'.format(
full, err))
if ind % 1000:
time.sleep(0.1)
def _try_read_one_log(self, stream):
"""
read one log record from the stream_close.
:return:
"""
if stream is None:
return (LOGFILE_EOF, None)
str_datalen = datalen = str_data = None
try:
str_datalen = stream.read(self._record_lenbytes)
if len(str_datalen) == 0:
return (LOGFILE_EOF, None)
if len(str_datalen) < self._record_lenbytes:
log.warn('got a bad log from stream:{0}'.format(stream.name))
return (LOGFILE_BAD_RECORD, None)
datalen = self.convert_bytes2uint(str_datalen)
str_data = stream.read(datalen)
if len(str_data) < datalen:
log.warn('got less than data len from stream:{0}'.format(
stream.name))
return (LOGFILE_BAD_RECORD, None)
log_id = self.convert_bytes2uint(str_data[0:16])
log_type = self.convert_bytes2uint(str_data[16:16 + 2])
log_mode = self.convert_bytes2uint(str_data[18:18 + 2])
log_binary = str_data[20:]
return (LOGFILE_GOOD,
LogRecord(datalen, log_id, log_type, log_mode, log_binary))
except Exception as err:
log.error('failed to parse log record:{0}'.format(err))
log.error(traceback.format_exc())
return LOGFILE_BAD_RECORD
def _do_read(self, context):
log.debug('to read sock {0}'.format(context.get_context_info()))
sock = context.get_sock()
data = None
context.move2recving_msg()
while self._stopsign is not True:
try:
data = sock.recv(self.NET_RW_SIZE)
except socket.error as error:
err = error.args[0]
if err == errno.EAGAIN:
log.debug('EAGAIN happend peerinfo {0}'.format(
context.get_context_info()))
return context
elif err == errno.EWOULDBLOCK:
log.info('EWOULDBLOCK happend peerinfo {0}'.format(
context.get_context_info()))
return context
else:
log.info('Socket error:{0}, peer info {1}'.format(
error, context.get_context_info()))
context.to_destroy()
return context
except Exception as error:
log.error('Socket error happend, error:%s, peer info %s' %
(str(error), context.get_context_info()))
context.to_destroy()
return context
data_len = len(data)
if data_len == 0:
# socket closed by peer
context.to_destroy()
return context
context.do_recv_data(data, data_len)
del data
def try_move2next_sending_msg(self):
"""
move to next msg that will be sent
"""
if self._sending_msg is None or \
self._sending_msg.is_msg_already_sent():
log.debug('to move2next_sending_msg')
# if self._sending_msg is not None:
# # del self._sending_msg
# pass
try:
item = self._send_queue.get_nowait()
msg = item[2]
except queue.Empty:
log.debug('The send queue is empty')
msg = None
except Exception as error:
errmsg = (
'Catch a error that I cannot handle, err_msg:%s' %
str(error)
)
log.error(errmsg)
# self._lock.release()
raise CConnectionManager.QueueError(errmsg)
self._sending_msg = msg
else:
log.debug(
'No need to move to next msg since the current one'
'is not sent out yet'
)
temp = self._sending_msg
return temp
def run(self):
"""
run the msgcenter
"""
if not self.setup():
return False
thd_conn_man = threading.Thread(target=self._run_conn_manager, args=())
thd_conn_man.start()
thd_stat = threading.Thread(target=self.dump_stat, args=())
thd_stat.start()
ind = 0
msg_ackflag = async_msg.MSG_FLAG2NUM['FLAG_ACK']
while not self._stop:
msg = self._conn_mgr.get_recv_msg()
if ind >= 10000:
recv_queue = self._conn_mgr.get_recv_queue()
log.info('msgcenter netmsg queue size:{0}'.format(
recv_queue.qsize()))
ind = 0
if msg is not None:
try:
log.info(
'msg received, type:%d, flag:%d, from:%s, uniqid:%d' %
(msg.get_msg_type(), msg.get_flag(),
str(msg.get_from_addr()), msg.get_uniq_id()))
ind += 1
if msg_ackflag & msg.get_flag() == msg_ackflag:
self._conn_mgr.push_msg2needack_queue(msg)
self.handle(msg)
# pylint: disable=W0703
except Exception as err:
log.error('get a msg that cannot be handled.'
'Seems network err:{0}'.format(err))
msg = None
return True
def get(self, path, localpath):
"""
get a file into localpath
"""
ret = {
'returncode': 0,
'msg': 'success'
}
log.info('to get ftp file {0} to {1}'.format(path, localpath))
self._check_timeout()
cwd = self._ftp_con.pwd()
path = self._get_relative_path(path, cwd)
if localpath.endswith('/'):
localpath += path.split('/')[-1]
log.info('to get ftp {0} to local {1}'.format(path, localpath))
try:
with open(localpath, 'w+') as fhandle:
ftp_cmd = 'RETR {0}'.format(path)
resp = self._ftp_con.retrbinary(ftp_cmd, fhandle.write)
except Exception as error:
ret['returncode'] = -1
ret['msg'] = 'failed to get {0} to {1}, err:{2}'.format(
path, localpath, error
)
log.error(ret['msg'])
return ret
def _do_write(self, context):
"""write into interface sending buffer"""
sock = context.get_sock()
msg = context.try_move2next_sending_msg()
if msg is None:
log.debug('send queue is empty, quit the _do_write thread')
return context
# log.debug('To enter write loop until eagin')
# pylint:disable=w0212
while not self._stopsign:
data = msg.get_write_bytes(self.NET_RW_SIZE)
log.debug('msg get_write_bytes_len to be sent: %d' % len(data))
try:
succ_len = sock.send(data)
msg.seek_write(succ_len)
except cuperr.AsyncMsgError as error:
log.debug('has seek out of msg len, continue')
except socket.error as error:
err = error.args[0]
if err == errno.EAGAIN:
log.debug(
'EAGAIN happend, context info %s' %
context.get_context_info()
)
return context
elif err == errno.EWOULDBLOCK:
log.debug(
'EWOULDBLOCK happend, context info %s' %
context.get_context_info()
)
return context
else:
log.warn(
'Socket error happend. But its not eagin,error:%s,\
context info %s, errno:%s' %
(str(error), context.get_context_info(), err)
)
context.to_destroy()
break
except Exception as error:
log.error(
'Socket error happend, error:%s, context info %s, trace:%s' %
(str(error), context.get_context_info(), traceback.format_exc())
)
context.to_destroy()
break
finally:
del data
if msg.is_msg_already_sent():
log.info(
'sent out a msg uniqid:{0}'.format(
async_msg.netmsg_tostring(msg))
)
# if we have successfully send out a msg. Then move to next one
msg = context.try_move2next_sending_msg()
if msg is None:
break
return context
def open4read(self):
"""open logs for read"""
if self._load_stream is None:
if not self._do_open4read():
log.error('failed to open4read, return')
return False
else:
return True
def loop(self):
"""run loop"""
self._status.set_status(self._status.RUNNING)
self._executor.run()
self._send_heartbeat_loop()
if not msgcenter.IMessageCenter.run(self):
log.error('message center error happened')
self.stop()
def loop(self):
"""run loop"""
self._status.set_status(self._status.RUNNING)
self._executor.run()
self._send_heartbeat_loop()
if not msgcenter.IMessageCenter.run(self):
log.error('message center error happened')
self.stop()
def open4read(self):
"""open logs for read"""
if self._load_stream is None:
if not self._do_open4read():
log.error('failed to open4read, return')
return False
else:
return True
def setup(self):
"""
setup the message center
"""
try:
self._bind_port()
return True
except socket.error as error:
log.error('bind error:{0}'.format(error))
return False
def set_current_logid(self, logid):
"""reset current log id"""
if logid < 0:
raise ValueError('cannot setup logid less than 0')
self._logid = logid
fname = self._get_next_logfile(self._logid)
if not self._stream_wbopen(fname):
log.error('failed to open stream, return False')
return False
log.info('reset current log id to {0}'.format(logid))
return True
def set_current_logid(self, logid):
"""reset current log id"""
if logid < 0:
raise ValueError('cannot setup logid less than 0')
self._logid = logid
fname = self.get_next_logfile(self._logid)
if not self._stream_open(fname):
log.error('failed to open stream, return False')
return False
log.info('reset current log id to {0}'.format(logid))
return True
def _do_write(self, context):
"""write into interface sending buffer"""
sock = context.get_sock()
msg = context.try_move2next_sending_msg()
if msg is None:
log.debug('send queue is empty, quit the _do_write thread')
return context
# log.debug('To enter write loop until eagin')
# pylint:disable=w0212
# log.debug('This msg _need_head:%s' % msg._need_head)
while not self._stopsign:
data = msg.get_write_bytes(self.NET_RW_SIZE)
# log.debug('get_write_bytes_len: %d' % len(data))
try:
succ_len = sock.send(data)
# log.debug('succeed to send length:%d' % succ_len)
msg.seek_write(succ_len)
except socket.error as error:
err = error.args[0]
if err == errno.EAGAIN:
log.debug('EAGAIN happend, context info %s' %
context.get_context_info())
return context
elif err == errno.EWOULDBLOCK:
log.debug('EWOULDBLOCK happend, context info %s' %
context.get_context_info())
return context
else:
log.warn(
'Socket error happend. But its not eagin,error:%s,\
context info %s, errno:%s' %
(str(error), context.get_context_info(), err))
context.to_destroy()
break
except Exception as error:
log.error('Socket error happend, error:%s, context info %s' %
(str(error), context.get_context_info()))
context.to_destroy()
break
finally:
del data
log.debug('%d bytes has been sent' % succ_len)
if msg.is_msg_already_sent():
log.info(
'end sending out a msg: msg_type:%d, msg_len:%d,'
'msg_flag:%d, msg_dest:%s, uniqid:%d, dict:%s' %
(msg.get_msg_type(), msg.get_msg_len(), msg.get_flag(),
str(msg.get_to_addr()), msg.get_uniq_id(), msg._data))
# if we have successfully send out a msg. Then move to next one
msg = context.try_move2next_sending_msg()
if msg is None:
break
return context
def _check_need_new_logfile(self):
"""if need new log file"""
if os.path.exists(self._loglist_switched) and self._logfile_switching:
try:
os.rename(self._logfile_listnew, self._logfile_list)
os.remove(self._loglist_switch)
os.remove(self._loglist_switched)
# pylint: disable=W0703
except Exception as err:
log.error('failed to rename loglist, old:{0} new:{1}'.format(
self._loglist_switched, self._loglist_switch)
)
return False
if os.path.exists(self._loglist_switch) and \
(not self._logfile_switching):
self._loglist_stream.write('NEED_SWITCH_LOCALFILE\n')
self._loglist_stream.flush()
os.fsync(self._loglist_stream)
self._loglist_stream.close()
self._logfile_switching = True
if not os.path.exists(self._logfile_listnew):
try:
os.mknod(self._logfile_listnew)
# pylint: disable=W0703
except Exception as err:
log.error('switch loglist file failed:{0}'.format(err))
return False
self._loglist_stream = open(self._logfile_listnew, 'a')
if self._current_filesize >= self._max_log_file_size:
# log.info('serilizer file needs moving to a new one')
last_logid = self._writestream.name.split('.')[-1]
newname = os.path.normpath('{0}/done.{1}'.format(
os.path.dirname(self._writestream.name), last_logid
))
log.info(
'finish one log file, logid, range:{0}-{1}'.format(
last_logid, self._logid - 1
)
)
os.rename(self._writestream.name, newname)
self._stream_close()
self._loglist_stream.write('{0}\n'.format(newname))
self._loglist_stream.flush()
os.fsync(self._loglist_stream.fileno())
self._current_filesize = 0
# log.info('next logid:{0}'.format(self._logid))
fname = self.get_next_logfile(self._logid)
if not self._stream_open(fname):
return False
return True
def _write_data(self, binary):
""" write data into the local file"""
try:
self._writestream.write(binary)
self._writestream.flush()
os.fsync(self._writestream.fileno())
self._logid += 1
# pylint: disable=W0703
# need to catch such general exeception
except Exception as error:
log.error(
'failed to write data into LocalFileSerilizer, err:{0}'.format(
error))
return False
return True
def _write_data(self, binary):
""" write data into the local file"""
try:
self._writestream.write(binary)
self._writestream.flush()
os.fsync(self._writestream.fileno())
self._logid += 1
# pylint: disable=W0703
# need to catch such general exeception
except Exception as error:
log.error(
'failed to write data into LocalFileSerilizer, err:{0}'.format(
error)
)
return False
return True
def _check_need_new_logfile(self):
"""if need new log file"""
if os.path.exists(self._loglist_switch) and \
(not self._loglist_switching):
# start to switch
log.info('{0} loglist start to switch'.format(self._name))
self._loglist_switching = True
self._loglist_stream.write('NEED_SWITCH_LOCALFILE\n')
self._loglist_stream.flush()
os.fsync(self._loglist_stream)
self._loglist_stream.close()
if not os.path.exists(self._logfile_listnew):
try:
exfile.mk_newnode(self._logfile_listnew)
# pylint: disable=W0703
except Exception as err:
log.error('switch loglist file failed:{0}'.format(err))
return False
log.info('{0} loglist file {1} switched'.format(
self._name, self._logfile_list)
)
os.rename(self._logfile_list, self._logfile_listold)
os.rename(self._logfile_listnew, self._logfile_list)
self._loglist_stream = open(self._logfile_list, 'a')
self._loglist_switching = False
if self._current_filesize >= self._max_log_file_size:
# log.info('serilizer file needs moving to a new one')
last_logid = self._writestream.name.split('.')[-1]
newname = os.path.normpath('{0}/done.{1}'.format(
os.path.dirname(self._writestream.name), last_logid
))
log.info(
'finish one log file, logid, range:{0}-{1}'.format(
last_logid, self._logid - 1
)
)
os.rename(self._writestream.name, newname)
self._stream_close()
self._loglist_stream.write('{0}\n'.format(newname))
self._loglist_stream.flush()
os.fsync(self._loglist_stream.fileno())
self._current_filesize = 0
fname = self._get_next_logfile(self._logid)
if not self._stream_wbopen(fname):
return False
return True
def do_recv_data(self, data, data_len):
"""
push data into the recving_msg queue
network read should be in 1 thread only.
"""
if self._recving_msg is None:
raise cup.err.NotInitialized('self._recving_msg')
ret = self._recving_msg.push_data(data)
# log.debug('pushed data length: %d' % ret)
if ret < 0:
log.warn(
'receive an wrong socket msg, to close the peer:{0}'.format(
self._sock.get_peerinfo()
)
)
self.to_destroy()
return
if data_len >= ret:
if self._recving_msg.is_recvmsg_complete():
# log.debug(
# 'get a msg: msg_type:%d, msg_len:%d, msg_flag:%d,'
# 'msg_src:%s, msg_dest:%s, uniqid:%d' %
# (
# self._recving_msg.get_msg_type(),
# self._recving_msg.get_msg_len(),
# self._recving_msg.get_flag(),
# str(self._recving_msg.get_from_addr()),
# str(self._recving_msg.get_to_addr()),
# self._recving_msg.get_uniq_id()
# )
# )
self._conn.get_recv_queue().put(
(self._recving_msg.get_flag(), self._recving_msg)
)
if self._conn.get_recv_queue().qsize() >= 500:
time.sleep(0.1)
self._recving_msg = self.get_recving_msg()
# the pushed data should span on two msg datas
if data_len > ret:
return self.do_recv_data(data[ret:], (data_len - ret))
else:
log.error(
'Socket error. We cannot get more than pushed data length'
)
assert False
return
def do_recv_data(self, data, data_len):
"""
push data into the recving_msg queue
network read should be in 1 thread only.
"""
if self._recving_msg is None:
raise cup.err.NotInitialized('self._recving_msg')
try:
ret = self._recving_msg.push_data(data)
except IndexError as error:
log.warn('index error/msg len error happened:{0}'.format(error))
log.warn(traceback.format_exc())
log.warn('receive a msg that cannot handle, close the socket')
self.to_destroy()
return
if ret < 0:
log.warn(
'receive an wrong socket msg, to close the peer:{0}'.format(
self.get_peerinfo()))
self.to_destroy()
self._conn.cleanup_error_context(self)
return
if data_len >= ret:
if self._recving_msg.is_recvmsg_complete():
self._is_1st_recv_msg = False
self._conn.get_recv_queue().put(
(self._recving_msg.get_flag(), self._recving_msg))
if self.get_listened_peer() is None:
listened_peer = self._recving_msg.get_from_addr()[0]
self.set_listened_peer(listened_peer)
log.info(
'set listened peer {0} for this context({1})'.format(
listened_peer, self._peerinfo))
self._recving_msg = None
if self._conn.get_recv_queue().qsize() >= 500:
time.sleep(0.1)
self.move2recving_msg()
# the pushed data should span on two msg datas
if data_len > ret:
return self.do_recv_data(data[ret:], (data_len - ret))
else:
log.error(
'Socket error. We cannot get more than pushed data length')
assert False
return
def set(self, kvdict, expire_sec=None):
"""
set cache with kvdict
::
{
'key1': 'value1',
'key2': 'value2',
....
}
:param kvdict:
kvdict is a dict that contains your cache.
:param expire_sec:
if expire_sec is None, the cache will never expire.
:return:
True if set cache successfully. False otherwise.
"""
if all([
self._maxsize != 0,
len(kvdict) > self._maxsize
]):
log.error(
'KVCache {0} cannot insert more '
'elements than the maxsize'.format(self._name)
)
return False
expire_value = None
if expire_sec is not None and expire_sec != self.INFINITE_TIME:
expire_value = expire_sec + time.time()
else:
expire_value = self.INFINITE_TIME
with self._lock_release(b_rw_lock=True):
for key in kvdict:
if key in self._kv_data:
cup.log.debug(
'KVCache: Key:{0} updated.'.format(key)
)
self._kv_data[key] = (expire_value, kvdict[key])
continue
if not self._heapq_newset(key, kvdict[key], expire_value):
return False
return True
def _stream_wbopen(self, fname):
"""open new stream"""
ret = False
try:
parent = os.path.dirname(fname)
if not os.path.exists(parent):
os.makedirs(parent)
self._writestream = open(fname, 'w+b')
log.debug('open new stream succeed')
ret = True
except IOError as err:
log.error(
'IOError, failed to open stream, err:{0}, file:{1}'.format(
err, fname))
except OSError as err:
log.error(
'OSError, failed to open stream, err:{0}, file:{1}'.format(
err, fname))
return ret
def _heapq_newset(self, key, value, expire_value):
"""
headp set
"""
if any([
self._maxsize == 0,
len(self._kv_data) < self._maxsize
]):
# no limit, just insert it into the queue
self._sorted_keys.put((expire_value, key))
self._kv_data[key] = (expire_value, value)
return True
else:
# need replace the smallest one
while True:
try:
pop_value = self._sorted_keys.get_nowait()
except queue.Full:
return False
real_value = self._kv_data.get(pop_value[1], None)
# key exipred, key deleted in self._kv_data
if real_value is None:
self._kv_data[key] = (expire_value, value)
self._sorted_keys.put((expire_value, key))
return True
if real_value[0] > pop_value[0]:
# resort, adjust real
self._sorted_keys.put((expire_value, key))
else:
if expire_value < pop_value[0]:
log.error(
'KVCache {0} the alorithm you design has faults '
'the new inserted cache {1} expire time '
'< the oldest cache {2} in it'.format(
self._name, (key, expire_value), pop_value
)
)
return False
del self._kv_data[pop_value[1]]
self._kv_data[key] = (expire_value, value)
self._sorted_keys.put((expire_value, key))
break
return True
def open4write(self, truncate_last_failure=True):
"""
open4write
:raise Exception:
if encounter any IOError, will raise IOError(errmsg)
"""
try:
if not os.path.exists(self._logfile_list):
os.mknod(self._logfile_list)
self._loglist_stream = open(self._logfile_list, 'a')
except Exception as err:
log.error('cannot create loglist, raise IOError')
raise IOError('cannot create loglist, {0}'.format(err))
log.info(
'{0} try to recover from last '
'write if there is any need, truncate_last_failure:{1}'.format(
self._name, truncate_last_failure))
self._recover_from_lastwriting(truncate_last_failure)
def add_log(self, log_type, log_mode, log_binary):
"""add log into the local file
:return:
a tuple (result_True_or_False, logid_or_None)
"""
self._mlock.acquire()
ret = (True, None)
if not self.is_stream_wbopen():
fname = self._get_next_logfile(self._logid)
if not self._stream_wbopen(fname):
ret = (False, None)
if ret[0]:
# binary :=
# 32bit len | 128bit logid | log_type 16bit | log_mode 16bit| bin
bin_logid = self.asign_uint2byte_bybits(self._logid, 128)
bin_type = self.asign_uint2byte_bybits(log_type, 16)
bin_mode = self.asign_uint2byte_bybits(log_mode, 16)
data = '{0}{1}{2}{3}'.format(
bin_logid, bin_type, bin_mode, log_binary
)
data_len = len(data)
str_data_len = self.asign_uint2byte_bybits(
data_len, self._record_lenbytes * 8)
write_data = '{0}{1}'.format(str_data_len, data)
log.info('{0} add_log, type {1} mode {2}, logid {3}, '
'datelen:{4}'.format(
self._name, log_type, log_mode, self._logid, data_len)
)
if self._write_data(write_data):
self._current_filesize += (data_len + len(str_data_len))
if not self._check_need_new_logfile():
ret = (False, None)
else:
ret = (True, self._logid)
else:
log.error('failed to add_log(type:{} mode {}'.format(
log_type, log_mode)
)
ret = (False, None)
self._mlock.release()
return ret
def open4write(self, truncate_last_failure=True):
"""
open4write
:raise Exception:
if encounter any IOError, will raise IOError(errmsg)
"""
try:
if not os.path.exists(self._logfile_list):
os.mknod(self._logfile_list)
self._loglist_stream = open(self._logfile_list, 'a')
except Exception as err:
log.error('cannot create loglist, raise IOError')
raise IOError('cannot create loglist, {0}'.format(err))
log.info(
'try to recover from last '
'write if there is any need, truncate_last_failure:{0}'.format(
truncate_last_failure)
)
self._recover_from_lastwriting(truncate_last_failure)
def _move2next_load_fname(self):
""" get next load fname"""
folder = self._get_storage_dir()
fname = os.path.basename(self._load_stream.name)
files = self._get_ordered_logfiles(folder)
length = len(files)
ind = -1
try:
ind = files.index(fname)
except ValueError:
log.error('cannot find current log stream:{0}'.format(fname))
return LOGFILE_BAD_RECORD
newfile = None
if ind < (length - 2):
newfile = '{0}/{1}'.format(folder, files[ind + 1])
elif ind == (length - 2):
if files[length - 1].find('writing') < 0:
newfile = '{0}/{1}'.format(folder, files[length - 1])
else:
log.debug('does not have more finished log edits to read')
return LOGFILE_EOF
elif ind == (length - 1):
log.info('does not have more log edits to read, return')
return LOGFILE_EOF
try:
self._load_stream.close()
self._load_stream = open(newfile, 'rb')
return LOGFILE_GOOD
except StandardError as err:
log.error('failed to move to next load stream:{0}'.format(newfile))
log.error('err:{0}'.format(err))
return LOGFILE_BAD_RECORD
def _move2next_load_fname(self):
""" get next load fname"""
folder = self._get_storage_dir()
fname = os.path.basename(self._load_stream.name)
files = self._get_ordered_logfiles(folder)
length = len(files)
ind = -1
try:
ind = files.index(fname)
except ValueError:
log.error('cannot find current log stream:{0}'.format(fname))
return LOGFILE_BAD_RECORD
newfile = None
if ind < (length - 2):
newfile = '{0}/{1}'.format(folder, files[ind + 1])
elif ind == (length - 2):
if files[length - 1].find('writing') < 0:
newfile = '{0}/{1}'.format(folder, files[length - 1])
else:
log.debug('does not have more finished log edits to read')
return LOGFILE_EOF
elif ind == (length - 1):
log.info('does not have more log edits to read, return')
return LOGFILE_EOF
try:
self._load_stream.close()
self._load_stream = open(newfile, 'rb')
return LOGFILE_GOOD
except StandardError as err:
log.error('failed to move to next load stream:{0}'.format(newfile))
log.error('err:{0}'.format(err))
return LOGFILE_BAD_RECORD
def get_hostip(hostname=None):
"""
get ipaddr of a host
:param hostname:
None, by default, will use udp to get ipaddr for ipv4
if not None, will use hostname to convert to ipaddr
"""
ipaddr = None
times = 0
if hostname is not None:
times = 0
while times < 10:
try:
ipaddr = str(socket.gethostbyname(hostname))
break
except socket.gaierror:
times += 1
time.sleep(0.1)
else:
log.error('failed to get hostip for {0}'.format(hostname))
return ipaddr
else:
while times < 10:
try:
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.connect(('8.8.8.8', 80))
ipaddr = sock.getsockname()[0]
break
except socket.error:
hostname = get_local_hostname()
ipaddr = str(socket.gethostbyname(hostname))
break
finally:
sock.close()
times += 1
else:
log.error('failed to get hostip')
return ipaddr
def _stream_open(self, fname):
"""open new stream"""
ret = False
try:
parent = os.path.dirname(fname)
if not os.path.exists(parent):
os.makedirs(parent)
self._writestream = open(fname, 'w+b')
log.debug('open new stream succeed')
ret = True
except IOError as err:
log.error(
'IOError, failed to open stream, err:{0}, file:{1}'.format(
err, fname
)
)
except OSError as err:
log.error(
'OSError, failed to open stream, err:{0}, file:{1}'.format(
err, fname
)
)
return ret
def get_hostip(hostname=None):
"""
拿到某hostname的ip地址.
:param hostname:
机器的hostname, 默认为None代表不传值， 函数将自动获取当前机器的ip
"""
times = 0
ipaddr = None
got = False
while times < 10:
try:
if hostname is None:
hostname = get_local_hostname()
ipaddr = str(socket.gethostbyname(hostname))
got = True
break
except socket.gaierror:
times += 1
time.sleep(0.1)
if not got:
log.error('failed to get socket hostname for {0}'.format(hostname))
return ipaddr
def get_hostip(hostname=None):
"""
get ipaddr of a host
:param hostname:
None, by default, will get localhost ipaddr
"""
times = 0
ipaddr = None
got = False
while times < 10:
try:
if hostname is None:
hostname = get_local_hostname()
ipaddr = str(socket.gethostbyname(hostname))
got = True
break
except socket.gaierror:
times += 1
time.sleep(0.1)
if not got:
log.error('failed to get socket hostname for {0}'.format(hostname))
return ipaddr
def get_hostip(hostname=None):
"""
拿到某hostname的ip地址.
:param hostname:
机器的hostname, 默认为None代表不传值， 函数将自动获取当前机器的ip
"""
times = 0
ipaddr = None
got = False
while times < 10:
try:
if hostname is None:
hostname = get_local_hostname()
ipaddr = str(socket.gethostbyname(hostname))
got = True
break
except socket.gaierror:
times += 1
time.sleep(0.1)
if not got:
log.error('failed to get socket hostname for {0}'.format(hostname))
return ipaddr
def _do_open4read(self, start_logid=-1):
"""
get open load stream
:TODO:
read starting from logid
"""
load_dir = self._get_storage_dir(logid=self._logid)
self._buffer_files = self._get_ordered_logfiles(load_dir)
to_open = None
if len(self._buffer_files) <= 0:
log.warn('does not have any log record yet')
else:
if -1 == start_logid:
to_open = self._buffer_files[0]
else:
pass
# if self._load_stream is None:
# log.error('load stream should not be None')
# return False
# name = os.path.basename(self._load_stream.name)
# ind = -1
# try:
# ind = self._buffer_files.index(name)
# except ValueError:
# log.error('does not find the log: {0}'.format(name))
# return False
# to_open = self._buffer_files[ind]
try:
fname = '{0}/{1}'.format(load_dir, to_open)
self._load_stream = open(fname, 'rb')
return True
# pylint:disable=W0703
# need such an exception
except Exception as err:
log.error('failed to open log stream :{0}'.format(err))
return False
def _try_read_one_log(self, stream):
"""
read one log record from the stream_close.
:return:
"""
if stream is None:
return LOGFILE_EOF
str_datalen = datalen = str_data = None
try:
str_datalen = stream.read(4)
if len(str_datalen) == 0:
return (LOGFILE_EOF, None)
if len(str_datalen) < 4:
log.warn('got a bad log from stream:{0}'.format(stream.name))
return LOGFILE_BAD_RECORD
datalen = self.convert_bytes2uint(str_datalen)
str_data = stream.read(datalen)
if len(str_data) < datalen:
log.warn(
'got less than data len from stream:{0}'.format(
stream.name)
)
return (LOGFILE_BAD_RECORD, None)
log_id = self.convert_bytes2uint(str_data[0:16])
log_type = self.convert_bytes2uint(str_data[16:2])
log_mode = self.convert_bytes2uint(str_data[18:2])
log_binary = self.convert_bytes2uint(str_data[20:])
return (
LOGFILE_GOOD, LogRecord(
datalen, log_id, log_type, log_mode, log_binary
)
)
except Exception as err:
log.error('failed to parse log record:{0}'.format(err))
return LOGFILE_BAD_RECORD
def _do_open4read(self, start_logid=-1):
"""
get open load stream
:TODO:
read starting from logid
"""
load_dir = self._get_storage_dir(logid=self._logid)
self._buffer_files = self._get_ordered_logfiles(load_dir)
to_open = None
if len(self._buffer_files) <= 0:
log.warn('does not have any log record yet')
else:
if -1 == start_logid:
to_open = self._buffer_files[0]
else:
pass
# if self._load_stream is None:
# log.error('load stream should not be None')
# return False
# name = os.path.basename(self._load_stream.name)
# ind = -1
# try:
# ind = self._buffer_files.index(name)
# except ValueError:
# log.error('does not find the log: {0}'.format(name))
# return False
# to_open = self._buffer_files[ind]
try:
fname = '{0}/{1}'.format(load_dir, to_open)
self._load_stream = open(fname, 'rb')
return True
# pylint:disable=W0703
# need such an exception
except Exception as err:
log.error('failed to open log stream :{0}'.format(err))
return False
def test_gen_wf():
"""
init_comlog指定ge_wf参数为True时，将大于等于WARING级别的消息
写入${logfile}.wf日志文件中。本case用来验证相关功能是否符合
预期。
"""
log.init_comlog(
"Yang Honggang", logging.DEBUG, "cup.log",
log.ROTATION, gen_wf=True
)
log.info("info")
log.critical("critical")
log.error("error")
log.warn("warning")
log.debug("debug")
# 检查是否生成了cup.log和cup.log.wf文件
try:
flog = open('cup.log')
flog_wf = open('cup.log.wf')
except IOError:
assert(False), "can not find cup.log or cup.log.wf file"
# 检查cup.log的内容是否包括“debug”、"info"
flog_str = flog.read()
assert('debug' in flog_str and 'info' in flog_str), "cup.log's content error"
# 检查cup.log.wf的内容是否包括"critical"、“error”和“warning”
flog_wf_str = flog_wf.read()
assert('critical' in flog_wf_str and 'error' in flog_wf_str and \
'warning' in flog_wf_str), "cup.log.wf's content error"
assert('debug' not in flog_wf_str and 'info' not in flog_wf_str), \
"cup.log.wf's content error"
# cup.log的内容不应该包括"critical"、“error”和“warning”
assert('critical' not in flog_str and 'error' not in flog_str and \
'warning' not in flog_str), "cup.log's content error"
def get_recv_msg(self):
"""
get recv msg from queue
"""
log.debug('to fetch a msg from recv_queue for handle function')
try:
# should use block-mode, othwersie the while loop in the upper
# code scope will crazily occupy a full cpu-core capacity.
msg = self._recv_queue.get(block=True, timeout=0.5)[1]
except queue.Empty as error:
msg = None
except TypeError as error:
log.error(
'type error, seems received SIGTERM, err:{0}'.format(error))
msg = None
except Exception as error:
msg = 'Catch a error that I cannot handle, err_msg:%s' % error
log.error(msg)
log.error(type(error))
raise CConnectionManager.QueueError(msg)
return msg
def get_recv_msg(self):
"""
get recv msg from queue
"""
# log.debug('to fetch a msg from recv_queue for handle function')
try:
msg = self._recv_queue.get_nowait()[1]
# msg = self._recv_queue.get()[1]
except queue.Empty as error:
# log.debug('The recv queue is empty')
msg = None
except TypeError as error:
log.error(
'type error, seems received SIGTERM, err:{0}'.format(error))
msg = None
except Exception as error:
msg = 'Catch a error that I cannot handle, err_msg:%s' % error
log.error(msg)
log.error(type(error))
raise CConnectionManager.QueueError(msg)
return msg
def get_recv_msg(self):
"""
get recv msg from queue
"""
log.debug('to fetch a msg from recv_queue for handle function')
try:
# msg = self._recv_queue.get_nowait()[1]
msg = self._recv_queue.get()[1]
except queue.Empty as error:
log.debug('The recv queue is empty')
msg = None
except TypeError as error:
log.error('type error, seems received SIGTERM, err:{0}'.format(
error)
)
msg = None
except Exception as error:
msg = 'Catch a error that I cannot handle, err_msg:%s' % error
log.error(msg)
log.error(type(error))
raise CConnectionManager.QueueError(msg)
return msg
def _recover_from_lastwriting(self, truncate_last_failure=True):
"""
recovery from last log writing
:raise Exception:
IOError, if any error happened
"""
folder = self._get_storage_dir()
files = self._get_ordered_logfiles(folder)
need_finish_file = False
if len(files) < 1:
log.info('no need recovery. Does not contain any files')
return
file_start_logid = -1
seek_file = None
if files[-1].find('writing') < 0:
# does not need recovery
log.info('does not have unfinished logfile, return')
file_start_logid = int(files[-1].split('.')[-1]) + 1
seek_file = files[-1]
log.info('next logid will be {0}'.format(self._logid))
else:
# need recovery, checkup, must <= 0 writing log file
count = 0
for fname in files:
if fname.find('writing') >= 0:
count += 1
if count > 1:
errmsg = 'has more than 1 writing log files, count:{0}'
log.error(errmsg.format(count))
raise IOError(errmsg)
log.info('has not finished log file, recovery start')
seek_file = files[-1]
file_start_logid = int(seek_file.split('.')[-1])
fullname = os.path.normpath('{0}/{1}'.format(folder, seek_file))
done_id = file_start_logid
read_length = 0
try:
reader = open(fullname, 'rb')
while True:
ret, _ = self._try_read_one_log(reader)
if ret == LOGFILE_BAD_RECORD:
if truncate_last_failure:
log.info(
'to truncate last writing file:{0}'
', size:{1}'.format(
files[-1], read_length)
)
reader.truncate(read_length)
break
else:
raise IOError(
'truncate_last_failure is not enabled &&'
' Bad record found'
)
elif ret == LOGFILE_EOF:
log.info('log file is intact, no need truncating')
break
elif ret == LOGFILE_GOOD:
done_id += 1
read_length = reader.tell()
newname = os.path.normpath('{0}/{1}'.format(
folder, 'done.{0}'.format(file_start_logid))
)
if fullname != newname:
log.info('move last writing file {0} to {1}'.format(
fullname, newname)
)
os.rename(fullname, newname)
self._loglist_stream.write('{0}\n'.format(newname))
self._loglist_stream.flush()
os.fsync(self._loglist_stream.fileno())
self._logid = done_id
log.info('next logid will be {0}'.format(self._logid))
except Exception as err:
log.error('failed to recover from last log:{0}'.format(err))
raise IOError(err)
return
def _do_write(self, context):
sock = context.get_sock()
msg = context.try_move2next_sending_msg()
if msg is None:
log.debug('send queue is empty, quit the _do_write thread')
return context
log.debug('To enter write loop until eagin')
# pylint:disable=w0212
# log.debug('This msg _need_head:%s' % msg._need_head)
while not self._stopsign:
data = msg.get_write_bytes(self.NET_RW_SIZE)
log.debug('get_write_bytes_len: %d' % len(data))
try:
succ_len = sock.send(data)
# log.debug('succeed to send length:%d' % succ_len)
msg.seek_write(succ_len)
except socket.error as error:
err = error.args[0]
if err == errno.EAGAIN:
log.debug(
'EAGAIN happend, context info %s' %
context.get_context_info()
)
return context
elif err == errno.EWOULDBLOCK:
log.debug(
'EWOULDBLOCK happend, context info %s' %
context.get_context_info()
)
return context
else:
log.warn(
'Socket error happend. But its not eagin,error:%s,\
context info %s, errno:%s' %
(str(error), context.get_context_info(), err)
)
context.to_destroy()
break
except Exception as error:
log.error(
'Socket error happend, error:%s, context info %s' %
(str(error), context.get_context_info())
)
context.to_destroy()
break
finally:
del data
log.debug('%d bytes has been sent' % succ_len)
if msg.is_msg_already_sent():
# log.debug(
# 'send out a msg: msg_type:%d, msg_len:%d, msg_flag:%d, '
# 'msg_src:%s, msg_dest:%s, uniqid:%d' %
# (
# msg.get_msg_type(),
# msg.get_msg_len(),
# msg.get_flag(),
# str(msg.get_from_addr()),
# str(msg.get_to_addr()),
# msg.get_uniq_id()
# )
# )
# if we have successfully send out a msg. Then move to next one
msg = context.try_move2next_sending_msg()
if msg is None:
break
return context
def push_msg2sendqueue(self, msg):
"""
push msg into the send queue
"""
ret = 0
if msg is None:
log.warn('put a None into msg send queue. return')
ret = -1
return ret
flag = msg.get_flag()
# log.debug('to put flag and msg into the queue. flag:%d' % flag)
# self._send_queue.put( (flag, msg) )
peer = msg.get_to_addr()[0]
new_created = False
context = None
sock = None
try:
context = self._peer2context[peer]
except KeyError:
log.info('To create a new context for the sock:{0}'.format(
peer)
)
self._mlock.acquire()
if peer not in self._peer2context:
sock = self.connect(peer)
if sock is not None:
context = CConnContext()
context.set_conn_man(self)
context.set_sock(sock)
context.set_peerinfo(peer)
fileno = sock.fileno()
self._peer2context[peer] = context
self._fileno2context[fileno] = context
self._context2fileno_peer[context] = (fileno, peer)
log.info('created context for the new sock')
ret = 0
try:
self._epoll.register(
sock.fileno(), self._epoll_write_params()
)
except Exception as error: # pylint: disable=W0703
log.warn(
'failed to register the socket fileno, err_msg:%s,'
'perinfo:%s:%s. To epoll modify it' %
(str(error), peer[0], peer[1])
)
self._epoll.modify(
sock.fileno(), self._epoll_write_params()
)
else:
log.error(
'failed to post msg. Connect failed. peer info:{0}.'
' msg_type:{1}'.format(
str(peer), msg.get_msg_type()
)
)
ret = -1
else:
context = self._peer2context[peer]
self._mlock.release()
else:
context = self._peer2context[peer]
if ret != 0:
return ret
if not context.is_detroying():
if context.put_msg(flag, msg) == 0:
ret = 0
else:
ret = -1
self._handle_new_send(context)
return ret
def read(self, record_num=128):
"""
load log into memory
:notice:
If skip_badlog is not True, will raise IOError if the stream
encounters any error.
Otherwise, the stream will skip the bad log file, move to next one
and continue reading
:return:
a. return a list of "record_num" of LogRecords.
b. If the count number of list is less than record_num,
it means the stream encounter EOF, plz read again afterwards.
c. If the returned is None, it means the stream got nothing, plz
try again.
"""
recordlist = []
count = 0
move2nextstream = False
while count < record_num:
ret, retval = self._try_read_one_log(self._load_stream)
if ret == LOGFILE_EOF:
# need read next log file
move2nextstream = True
elif ret == LOGFILE_GOOD:
recordlist.append(retval)
count += 1
continue
elif ret == LOGFILE_BAD_RECORD:
if not self._skip_badlog:
raise IOError(
'find bad records in {0}'.format(
self._load_stream.name)
)
else:
log.warn(
'Bad record! '
'But skip_badlog is on, will skip the file:{0}'.format(
self._load_stream.name)
)
move2nextstream = True
if move2nextstream:
move2nextstream = False
ret = self._move2next_load_fname()
if LOGFILE_EOF == ret:
log.debug('does not have more log edits to read, plz retry')
break
elif LOGFILE_GOOD == ret:
log.debug('moved to next log edit file, to read new log')
continue
elif LOGFILE_BAD_RECORD == ret:
log.error('IOError happended, read_logs failed')
if self._skip_badlog:
log.error('skip bad log is on, try moving to next one')
move2nextstream = True
continue
else:
raise IOError('encounter bad records, raise exception')
return recordlist
