How to use _log_file method in autotest

Best Python code snippet using autotest_python

log.py

Source:log.py

1# Copyright 2011 The Chromium Authors. All rights reserved.2# Use of this source code is governed by a BSD-style license that can be3# found in the LICENSE file.4import atexit5import fcntl6import json7import os8import sys9import time10import threading11_lock = threading.Lock()12_enabled = False13_log_file = None14_cur_events = [] # events that have yet to be buffered15_tls = threading.local() # tls used to detect forking/etc16_atexit_regsitered_for_pid = None17_control_allowed = True18class TraceException(Exception):19  pass20def _note(msg, *args):21  pass22#  print "%i: %s" % (os.getpid(), msg)23def _locked(fn):24  def locked_fn(*args,**kwargs):25    _lock.acquire()26    try:27      ret = fn(*args,**kwargs)28    finally:29      _lock.release()30    return ret31  return locked_fn32def _disallow_tracing_control():33  global _control_allowed34  _control_allowed = False35def trace_enable(log_file=None):36  _trace_enable(log_file)37  38@_locked39def _trace_enable(log_file=None):40  global _enabled41  if _enabled:42    raise TraceException("Already enabled")43  if not _control_allowed:44    raise TraceException("Tracing control not allowed in child processes.")45  _enabled = True46  global _log_file47  if log_file == None:48    if sys.argv[0] == '':49      n = 'trace_event'50    else:51      n = sys.argv[0]52    log_file = open("%s.json" % n, "ab", False)53    _note("trace_event: tracelog name is %s.json" % n)54  elif isinstance(log_file, basestring):55    _note("trace_event: tracelog name is %s" % log_file)56    log_file = open("%s" % log_file, "ab", False)57  elif not hasattr(log_file, 'fileno'):58    raise TraceException("Log file must be None, a string, or a file-like object with a fileno()")59  _log_file = log_file60  fcntl.lockf(_log_file.fileno(), fcntl.LOCK_EX)61  _log_file.seek(0, os.SEEK_END)62  lastpos = _log_file.tell()63  creator = lastpos == 064  if creator:65    _note("trace_event: Opened new tracelog, lastpos=%i", lastpos)66    _log_file.write('[')67    tid = threading.current_thread().ident68    if not tid:69      tid = os.getpid()70    x = {"ph": "M", "category": "process_argv",71         "pid": os.getpid(), "tid": threading.current_thread().ident,72         "ts": time.time(),73         "name": "process_argv", "args": {"argv": sys.argv}}74    _log_file.write("%s\n" % json.dumps(x))75  else:76    _note("trace_event: Opened existing tracelog")77  _log_file.flush()78  fcntl.lockf(_log_file.fileno(), fcntl.LOCK_UN)79@_locked80def trace_flush():81  if _enabled:82    _flush()83@_locked84def trace_disable():85  global _enabled86  if not _control_allowed:87    raise TraceException("Tracing control not allowed in child processes.")88  if not _enabled:89    return90  _enabled = False91  _flush(close=True)92def _flush(close=False):93  global _log_file94  fcntl.lockf(_log_file.fileno(), fcntl.LOCK_EX)95  _log_file.seek(0, os.SEEK_END)96  if len(_cur_events):97    _log_file.write(",\n")98    _log_file.write(",\n".join([json.dumps(e) for e in _cur_events]))99    del _cur_events[:]100  if close:101    # We might not be the only process writing to this logfile. So,102    # we will simply close the file rather than writign the trailing ] that103    # it technically requires. The trace viewer understands that this may happen104    # and will insert a trailing ] during loading.105    pass106  _log_file.flush()107  fcntl.lockf(_log_file.fileno(), fcntl.LOCK_UN)108  if close:109    _note("trace_event: Closed")110    _log_file.close()111    _log_file = None112  else:113    _note("trace_event: Flushed")114@_locked115def trace_is_enabled():116  return _enabled117@_locked118def add_trace_event(ph, ts, category, name, args=None):119  global _enabled120  if not _enabled:121    return122  if not hasattr(_tls, 'pid') or _tls.pid != os.getpid():123    _tls.pid = os.getpid()124    global _atexit_regsitered_for_pid125    if _tls.pid != _atexit_regsitered_for_pid:126      _atexit_regsitered_for_pid = _tls.pid127      atexit.register(_trace_disable_atexit)128      _tls.pid = os.getpid()129      del _cur_events[:] # we forked, clear the event buffer!130    tid = threading.current_thread().ident131    if not tid:132      tid = os.getpid()133    _tls.tid = tid134  if ts:135    ts = 1000000 * ts136  _cur_events.append({"ph": ph, "category": category,137                      "pid": _tls.pid, "tid": _tls.tid,138                      "ts": ts,139                      "name": name, "args": args or {}});140def trace_begin(name, args=None):141  add_trace_event("B", time.time(), "python", name, args)142def trace_end(name, args=None):143  add_trace_event("E", time.time(), "python", name, args)144def _trace_disable_atexit():...

logger.py

Source:logger.py

1#!/usr/bin/python2.42#3#4# Copyright 2007, The Android Open Source Project5#6# Licensed under the Apache License, Version 2.0 (the "License");7# you may not use this file except in compliance with the License.8# You may obtain a copy of the License at9#10#     http://www.apache.org/licenses/LICENSE-2.011#12# Unless required by applicable law or agreed to in writing, software13# distributed under the License is distributed on an "AS IS" BASIS,14# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.15# See the License for the specific language governing permissions and16# limitations under the License.17"""Simple logging utility. Dumps log messages to stdout, and optionally, to a18log file.19Init(path) must be called to enable logging to a file20"""21import datetime22_LOG_FILE = None23_verbose = False24_log_time = True25def Init(log_file_path):26  """Set the path to the log file"""27  global _LOG_FILE28  _LOG_FILE = log_file_path29  print "Using log file: %s" % _LOG_FILE30def GetLogFilePath():31  """Returns the path and name of the Log file"""32  global _LOG_FILE33  return _LOG_FILE34def Log(new_str):35  """Appends new_str to the end of _LOG_FILE and prints it to stdout.36  Args:37    # new_str is a string.38    new_str: 'some message to log'39  """40  msg = _PrependTimeStamp(new_str)41  print msg42  _WriteLog(msg)43def _WriteLog(msg):44  global _LOG_FILE45  if _LOG_FILE is not None:46    file_handle = file(_LOG_FILE, 'a')47    file_handle.write('\n' + str(msg))48    file_handle.close()49def _PrependTimeStamp(log_string):50  """Returns the log_string prepended with current timestamp """51  global _log_time52  if _log_time:53    return "# %s: %s" % (datetime.datetime.now().strftime("%m/%d/%y %H:%M:%S"),54        log_string)55  else:56    # timestamp logging disabled57    return log_string  58def SilentLog(new_str):59  """Silently log new_str. Unless verbose mode is enabled, will log new_str60    only to the log file61  Args:62    # new_str is a string.63    new_str: 'some message to log'64  """65  global _verbose66  msg = _PrependTimeStamp(new_str)67  if _verbose:68    print msg69  _WriteLog(msg)70def SetVerbose(new_verbose=True):71  """ Enable or disable verbose logging"""72  global _verbose73  _verbose = new_verbose74  75def SetTimestampLogging(new_timestamp=True):76  """ Enable or disable outputting a timestamp with each log entry"""77  global _log_time78  _log_time = new_timestamp79    80def main():81  pass82if __name__ == '__main__':...

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