我想捕獲多個進程的stderr和stdout,並使用python日誌記錄模塊將其輸出寫入日誌文件。下面的代碼似乎實現了這一點。目前,如果有任何數據,我會輪詢每個進程的stdout並寫入記錄器。有沒有更好的方式來做到這一點。Python日誌記錄從多個進程重定向標準輸出
此外,我還想擁有所有單個進程活動的主日誌,換句話說,我想自動(不用輪詢)將每個進程的所有stdout/stderr寫入主日誌記錄器。這可能嗎?
感謝
class MyProcess:
def __init__(self, process_name , param):
self.param = param
self.logfile = logs_dir + "Display_" + str(param) + ".log"
self.args = [process_name, str(param)]
self.logger_name = process_name + str(param)
self.start()
self.logger = self.initLogger()
def start(self):
self.process = Popen(self.args, bufsize=1, stdout=PIPE, stderr=STDOUT) #line buffered
# make each processes stdout non-blocking
fd = self.process.stdout
fl = fcntl.fcntl(fd, fcntl.F_GETFL)
fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NONBLOCK)
def initLogger(self):
f = logging.Formatter("%(levelname)s -%(name)s - %(asctime)s - %(message)s")
fh = logging.handlers.RotatingFileHandler(self.logfile, maxBytes=max_log_file_size, backupCount = 10)
fh.setFormatter(f)
logger = logging.getLogger(self.logger_name)
logger.setLevel(logging.DEBUG)
logger.addHandler(fh) #file handler
return logger
def getOutput(self): #non blocking read of stdout
try:
return self.process.stdout.readline()
except:
pass
def writeLog(self):
line = self.getOutput()
if line:
self.logger.debug(line.strip())
#print line.strip()
process_name = 'my_prog'
num_processes = 10
processes=[]
for param in range(num_processes)
processes.append(MyProcess(process_name,param))
while(1):
for p in processes:
p.writeLog()
sleep(0.001)