python实现logging模块异步线程写日志

通过logging模块，重写一个logging2模块，独立开启线程，将待写的日志信息异步放入队列，做到日志输出不影响主流程性能，环境python3.8

logging2.py

import os
import threading
import queue
import time
import datetime
import logging
from logging.handlers import RotatingFileHandler

class logging2(threading.Thread):
    AQueue = queue.Queue(100000)
    nPID = os.getpid()
    Adt = datetime.datetime.now().strftime(‘%Y%m%d‘)
    nCount = 1
    
    def __init__(self, threadID, name, module, logLevel):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.module = module
        
        print("set loglevel: [%s]" % (logLevel) )
        formatter = logging.Formatter(‘%(asctime)s|%(name)s|%(process)d|%(levelname)s|%(message)s‘)
        logfile = "log_" + self.module + "_" + str(logging2.nPID) + "_" + str(logging2.Adt) + ".log"
        self.logger = logging.getLogger(__name__)
        
        self.rHandler = RotatingFileHandler(logfile, maxBytes = 10*1024*1024, backupCount = 10)
        self.rHandler.setFormatter(formatter)
        
        self.console = logging.StreamHandler()    
        self.console.setFormatter(formatter)
        
        if logLevel == ‘DEBUG‘ :
            self.logger.setLevel(level = logging.DEBUG)
            self.rHandler.setLevel(logging.DEBUG)
            self.console.setLevel(logging.DEBUG)
        elif logLevel == ‘INFO‘ :
            self.logger.setLevel(level = logging.INFO)
            self.rHandler.setLevel(logging.INFO)
            self.console.setLevel(logging.INFO)
        elif logLevel == ‘WARNING‘ :
            self.logger.setLevel(level = logging.WARN)
            self.rHandler.setLevel(logging.WARN)
            self.console.setLevel(logging.WARN)
        elif logLevel == ‘ERROR‘ :
            self.logger.setLevel(level = logging.ERROR)
            self.rHandler.setLevel(logging.ERROR)
            self.console.setLevel(logging.ERROR)        

        self.logger.addHandler(self.rHandler)
        self.logger.addHandler(self.console)        

    #如果跨天了，则重新生成新的文件名
    def reSetLog(self):
        AdtTemp = datetime.datetime.now().strftime(‘%Y%m%d‘)
        #比较新的时间
        if AdtTemp == logging2.Adt:
            return(True)
            
        logging2.Adt = AdtTemp
        logfile = "log_" + self.module + "_" + str(logging2.nPID) + "_" + str(AdtTemp) + ".log"
        self.rHandler = RotatingFileHandler(logfile, maxBytes = 1*1024, backupCount = 10)
        
        self.logger.addHandler(self.rHandler)
        self.logger.addHandler(self.console)    
        logging2.nCount += 1
        
    def run(self):
        print ("开启日志线程：" + self.name)
        i = 0
        while True:
            #data = "queue test data"
            #debug(data)
            #print("Queuesize: %s" % (logging2.AQueue.qsize()))
            self.reSetLog()
            if logging2.AQueue.empty() == False:
                #从队列获取日志消息
                data = logging2.AQueue.get()
                #解析日志消息，格式：日志级别，内容
                level = list(data.keys())[0]
                content = data.get(level)
                #把内容按分隔符|解析成list传入参数
                lstContent = list(content.split(‘|‘))
                if level == ‘DEBUG‘ :
                    self.logger.debug(*lstContent)
                elif level == ‘INFO‘ :
                    self.logger.info(*lstContent)
                elif level == ‘WARNING‘ :
                    self.logger.warn(*lstContent)
                elif level == ‘ERROR‘ :
                    self.logger.error(*lstContent)
            else:
                time.sleep(0.5)

        print ("退出线程：" + self.name)    
    
def debug(*content):    
    logMsg = ""
    #传入多个参数用竖线分隔符分开
    for i in range(len(content)):
        if i == len(content)-1:
            logMsg += content[i]
        else:
            logMsg += content[i]+"|"
    logging2.AQueue.put({‘DEBUG‘:logMsg})
            
def info(*content):
    logMsg = ""
    for i in range(len(content)):
        if i == len(content)-1:
            logMsg += content[i]
        else:
            logMsg += content[i]+"|"
    logging2.AQueue.put({‘INFO‘:logMsg})
                
def warn(*content):
    logMsg = ""
    for i in range(len(content)):
        if i == len(content)-1:
            logMsg += content[i]
        else:
            logMsg += content[i]+"|"
    logging2.AQueue.put({‘WARNING‘:logMsg})
        
def error(*content):
    logMsg = ""
    for i in range(len(content)):
        if i == len(content)-1:
            logMsg += content[i]
        else:
            logMsg += content[i]+"|"
    logging2.AQueue.put({‘ERROR‘:logMsg})
                    
def init(module, level):
    # 创建新线程
    thread1 = logging2(1, "Thread-log", module, level)
    # 开启新线程
    thread1.start()
#    thread1.join()

测试桩logMain.py

import sys
import os
import time
import threading

if __name__ == ‘__main__‘:
    import logging2
    logging2.init("logMain", "DEBUG")
    
    teststr = "22222"
    
    while True:
        logging2.debug(‘this is a debug log test [%s] ‘, teststr)
        logging2.info(‘this is a info log test [%s] [%s]‘, teststr, teststr)
        logging2.warn(‘this is a warn log test‘)
        logging2.error(‘this is a error log test‘)
        #time.sleep(0.1)
    
    
    print(threading.enumerate())
    
    print(‘press ctrl_c to exit‘)

测试结果

生成日志文件：

-rw-rw-r--. 1 zxl zxl 10152463 6月  24 17:52 log_logMain_57554_20200624.log

文件内容如下：