{"id":1545,"date":"2018-11-20T19:16:45","date_gmt":"2018-11-20T11:16:45","guid":{"rendered":"http:\/\/ykyi.net\/?p=1545"},"modified":"2018-11-20T19:16:45","modified_gmt":"2018-11-20T11:16:45","slug":"%e5%a6%82%e4%bd%95%e5%ae%9a%e5%88%b6%e4%b8%80%e4%b8%aapython%e7%9a%84logging-handler","status":"publish","type":"post","link":"https:\/\/ykyi.net\/?p=1545","title":{"rendered":"\u5982\u4f55\u5b9a\u5236\u4e00\u4e2apython\u7684logging Handler"},"content":{"rendered":"<p>\u4e0a\u4e2a\u6708\u7528python\u7684gevent\u534f\u7a0b\u5e93\u5199\u4e86\u4e00\u4e2atcp\u670d\u52a1\u3002\u65e5\u5fd7\u5e93\u4f7f\u7528python\u6807\u51c6\u65e5\u5fd7\u5e93logging\u3002\u4e00\u4e2a\u6708\u540e\uff0c\u53d1\u73b0\u4e00\u4e2a\u5076\u53d1\u7684bug\u3002\u8fd9\u4e2abug\u53d1\u751f\u65f6\uff0c\u7528python\u7684\u6807\u51c6\u65e5\u5fd7\u5e93\u81ea\u5e26\u7684FileHandler\u5199\u7684\u65e5\u5fd7\u4f1a\u53d1\u5f80socket\u5360\u7528\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26fd\u3002\u7ed3\u679c\u5c31\u662f\uff0c\u5ba2\u6237\u7aef\u6536\u5230\u4e86\u672c\u8981\u6253\u5370\u5230\u78c1\u76d8\u4e0a\u7684\u65e5\u5fd7\u3002\u82b1\u4e86\u4e0d\u5c11\u65f6\u95f4\u5b9a\u4f4d\u6392\u67e5\u8fd9\u4e2abug\uff0c\u4ecd\u7136\u6ca1\u6709\u7ed3\u679c\u3002\u6211\u5f00\u59cb\u6000\u7591\u662fgevent\u534f\u7a0b\u5e93\u548cpython\u7684\u6807\u51c6\u65e5\u5fd7\u5e93logging\u6709\u51b2\u7a81\u3002\u534f\u7a0b\u5e93\u4f1a\u9519\u8bef\u7684\u628alogging\u6253\u5f00\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26fd\u5173\u95ed\u5e76\u5206\u914d\u7ed9\u65b0\u521b\u5efa\u7684socket\uff0c\u4e8e\u662f\u65e5\u5fd7\u5c31\u6253\u5370\u5230socket\u5360\u7528\u7684fd\u4e86\u3002<\/p>\n<p>\u540e\u6765\uff0c\u5199\u4e86\u4e00\u4e2a\u68c0\u6d4b\u811a\u672c\u7528\u6765\u76d1\u63a7\u8fd9\u4e2a\u60c5\u51b5\u53d1\u751f\u7684\u6982\u7387\u3002\u8be5\u811a\u672c\u6bcf\u5206\u949f\u4f1a\u68c0\u67e5\u8fdb\u7a0b\u5360\u7528\u7684\u6240\u6709fd\uff0c\u4e00\u4f46\u53d1\u73b0\u7528\u6765\u6253\u5370\u672c\u5730\u65e5\u5fd7\u7684\u6587\u4ef6fd\u4e0d\u89c1\u4e86\uff0c\u5c31\u91cd\u542f\u670d\u52a1\u8fdb\u7a0b\u3002\u6838\u5fc3\u4ee3\u7801\u5982\u4e0b:<\/p>\n<pre><code class=\"language-bash \">lsof -p <span class=\"katex math inline\">pid | grep -q<\/span>{log_file_name}\nif [ $? != 0 ]\nthen\n    # \u62a5\u8b66\u4ee3\u7801 ...\nfi\n<\/code><\/pre>\n<p>\u53d1\u73b0bug\u53d1\u751f\u7684\u9891\u7387\u5927\u6982\u662f\u4e00\u4e2a\u661f\u671f\u4e00\u6b21\u3002\u4f46\u8fd9\u6bd5\u7adf\u6839\u672c\u4e0a\u89e3\u51b3\u4e0d\u4e86\u95ee\u9898\u554a\uff0c\u53c8\u627e\u4e0d\u5230bug\u7684\u539f\u56e0\uff0c\u600e\u4e48\u529e\uff1f<\/p>\n<h3>\u90a3\u5c31\u81ea\u5b9a\u4e49\u4e00\u4e2aFile Handler\u5427\uff01<\/h3>\n<p>\u51b3\u5b9a\u81ea\u5b9a\u4e49\u4e00\u4e2aFile Handler\uff0c\u8fd9\u4e2aFile Handler\u5de5\u4f5c\u5728\u53e6\u5916\u4e00\u4e2a\u5355\u72ec\u7684\u8fdb\u7a0b\uff0c\u8fd9\u6837\u65e0\u8bba\u5982\u4f55\u65e5\u5fd7\u7528\u7684fd\u90fd\u4e0d\u4f1a\u8ddf\u4e3b\u8fdb\u7a0b\u7684\u5404\u79cdsocket\u7528\u7684fd\u51b2\u7a81\u4e86\u5427\u3002<br \/>\n\u4ee3\u7801\u5982\u4e0b\uff0c\u4e3b\u8981\u7528\u5230\u7684\u6280\u672f\u8fdb\u7a0b\u901a\u8baf\u548c\u7528python\u7684<code>__getattribute__<\/code>\u9b54\u6cd5\u628a\u622a\u83b7\u7c7b\u5b9e\u4f8b\u7684\u65b9\u6cd5\u8c03\u7528\u3002\u8fd9\u6837\uff0c\u53ea\u9700\u8981\u628a\u65e7\u7684\u4ee3\u7801\u4e2d\u7684File Handler(\u6211\u7528\u4e86TimedRotatingFileHandler)\u6362\u6210\u81ea\u5b9a\u4e49\u7684Handler Class\uff0c\u6240\u6709\u5176\u4ed6\u65e7\u4ee3\u7801\u90fd\u65e0\u9700\u6539\u52a8\u3002<\/p>\n<pre><code class=\"language-python \">#!\/usr\/bin\/env python3\n\n'''\ncreated by kamuszhou*AT*tencent.com, zausiu*AT*gmail.com http:\/\/ykyi.net\nNov 20, 2018\n'''\n\nimport logging\nimport logging.handlers\nfrom functools import partial\nfrom multiprocessing import Process, Queue\n\n\nclass MySpecialHandler(logging.StreamHandler):\n    def __init__(self, *args, **kargs):\n        self._q = Queue()\n        self._p = Process(target=MySpecialHandler.__run, args=(self._q,))\n        self._p.start()\n        self._q.put(('__init__', args, kargs))\n\n    def join(self):\n        self._p.join()\n\n    def __run(q):\n        handler = None\n        while True:\n            # op, params = q.get()\n            method, args, kwargs = q.get()\n            if method == '__init__':\n                handler = logging.handlers.TimedRotatingFileHandler(*args, **kwargs)\n            else:  # \u4e3b\u8fdb\u7a0b\u7684\u65e5\u5fd7\u8c03\u7528\u5b9e\u9645\u4e0a\u88ab\u8f6c\u5230\u8fd9\u91cc\n                getattr(handler, method)(*args, **kwargs)\n\n    def __proxy(self, name, *args, **kwargs):\n        # \u628a\u8c03\u7528\u7684\u65b9\u6cd5\u540d\u548c\u65b9\u6cd5\u53c2\u6570\u901a\u8fc7Queue\u4f20\u5230\u4e13\u95e8\u7684\u65e5\u5fd7\u8fdb\u7a0b\u3002\n        self._q.put((name, args, kwargs))\n        fun = logging.StreamHandler.__getattribute__(self, name)\n        # print('call method: ', name, args, kwargs)\n        # \u5982\u679c\u662fsetLevel\u51fd\u6570\uff0c\u518d\u8c03\u7528\u4e00\u6b21\u7236\u7c7b\u7684\u65b9\u6cd5\n        if name in {'setLevel'}:\n            return fun(*args, **kwargs)\n\n    def __getattribute__(self, name):\n        '''\n        Hook\u5927\u6cd5\uff01\u622a\u83b7\u6240\u6709\u65b9\u6cd5\n        '''\n        attr = logging.StreamHandler.__getattribute__(self, name)\n        if hasattr(attr, '__call__') and name not in {'join', 'emit'}:\n            return partial(MySpecialHandler.__proxy, self, name)\n        else:\n            return attr\n\n\nif __name__ == '__main__':\n    handler = MySpecialHandler('\/data\/tmp\/ttt.log', when='D', interval=1, backupCount=90)\n    handler.setLevel(logging.DEBUG)\n    formatter = logging.Formatter('%(asctime)s: %(levelname)s %(message)s')\n    handler.setFormatter(formatter)\n    logger = logging.getLogger(__name__)\n    logger.propagate = False  # Don't propagate the logging to ROOT\n    logger.setLevel(logging.DEBUG)\n    logger.addHandler(handler)\n    logger.debug('debug testtttttttt')\n    logger.info('info testtttttttttt')\n    logger.warn('warn testtttttttttt')\n    logger.error('error testtttttttt')\n    logger.critical('critical testttttt')\n    handler.join()\n\n<\/code><\/pre>\n<p>\u8fd9\u91cc\u81ea\u5b9a\u4e49\u7684\u65e5\u5fd7\u8fdb\u7a0b\u7c7b\u53ea\u662f\u4e00\u4e2a\u5f88\u7c97\u7cd9\u7684\u5b9e\u73b0\uff0c\u4e00\u4f46\u8dd1\u8d77\u6765\uff0c\u53ea\u80fd\u624b\u52a8\u6740\u8fdb\u7a0b\u3002\u53cd\u6b63\u6211\u7684\u4f7f\u7528\u573a\u666f\u662f\u4e00\u4e2a\u670d\u52a1\u3002\u6240\u4ee5\uff0c\u6211\u4e5f\u61d2\u5f97\u52a0\u2018\u4f18\u96c5\u7684\u9000\u51fa\u4ee3\u7801\u2019\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u8fd9\u91cc\u521b\u5efa\u81ea\u5b9a\u4e49\u65e5\u5fd7Handler\u7684\u7236\u7c7b\u662fStreamHandler\uff0c\u5b83\u8fd8\u6709\u4e00\u4e2a\u91cd\u8981\u7684\u51fd\u6570\u662femit\u3002\u5982\u679c\u60f3\u5b9a\u5236\u8fd9\u4e48\u4e00\u4e2aHandler\uff0c\u628a\u65e5\u5fd7\u53d1\u7ed9kafka\u800c\u4e0d\u9700\u8981\u8d77\u8fdb\u7a0b\u3002\u5219\u5b50\u7c7b\u9700\u8981\u91cd\u5199\u7236\u7c7b\u7684emit\u65b9\u6cd5\u3002\u6bd4\u5982\uff1a<\/p>\n<pre><code class=\"language-python \">    def emit(self, record):\n        msg = self.format(record)  # \u65e5\u5fd7\u4f1a\u4ee5record\u7684\u5f62\u5f0f\u4f20\u5165\u8be5\u51fd\u6570\uff0c\u7528format\u628a\u5b83\u683c\u5f0f\u5316\n        self.kafka_broker.send(msg, self.topic)\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>gevent\u8c8c\u4f3c\u548clogging\u51b2\u5bb3\uff0c\u5982\u4f55\u5b9a\u5236\u4e00\u4e2a\u65e5\u5fd7File Handler<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[67],"class_list":["post-1545","post","type-post","status-publish","format-standard","hentry","category-tech_articles","tag-python"],"_links":{"self":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/posts\/1545","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1545"}],"version-history":[{"count":0,"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/posts\/1545\/revisions"}],"wp:attachment":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}