import sys
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from datetime import datetime
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from threading import Thread
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import Queue
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from boto.utils import RequestHook
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from boto.compat import long_type
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class RequestLogger(RequestHook):
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"""
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This class implements a request logger that uses a single thread to
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write to a log file.
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"""
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def __init__(self, filename='/tmp/request_log.csv'):
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self.request_log_file = open(filename, 'w')
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self.request_log_queue = Queue.Queue(100)
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Thread(target=self._request_log_worker).start()
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def handle_request_data(self, request, response, error=False):
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len = 0 if error else response.getheader('Content-Length')
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now = datetime.now()
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time = now.strftime('%Y-%m-%d %H:%M:%S')
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td = (now - request.start_time)
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duration = (td.microseconds + long_type(td.seconds + td.days * 24 * 3600) * 1e6) / 1e6
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# write output including timestamp, status code, response time, response size, request action
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self.request_log_queue.put("'%s', '%s', '%s', '%s', '%s'\n" % (time, response.status, duration, len, request.params['Action']))
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def _request_log_worker(self):
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while True:
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try:
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item = self.request_log_queue.get(True)
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self.request_log_file.write(item)
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self.request_log_file.flush()
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self.request_log_queue.task_done()
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except:
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import traceback
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traceback.print_exc(file=sys.stdout)
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