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How to use build_alert_hooks method in autotest

Best Python code snippet using autotest_python

monitors_util.py

Source:monitors_util.py

...81                       if not line.startswith('#')]82    overrides_pairs = zip(overrides_lines[0::3], overrides_lines[1::3])83    _assert_is_all_blank_lines(overrides_lines[2::3], overrides_file)84    return dict(overrides_pairs)85def build_alert_hooks(patterns_file, warnfile, overrides_file=None):86    """Parse data in patterns file and transform into alert_hook list.87    Args:88      patterns_file: file; File to read alert pattern definitions from.89      warnfile: file; File to configure alert function to write warning to.90    Returns:91      list; Regex to alert function mapping.92          [(regex, alert_function), ...]93    """94    pattern_lines = patterns_file.readlines()95    # expected pattern format:96    # <msgtype> <newline> <regex> <newline> <alert> <newline> <newline>97    #   msgtype = a string categorizing the type of the message - used for98    #             enabling/disabling specific categories of warnings99    #   regex   = a python regular expression100    #   alert   = a string describing the alert message101    #             if the regex matches the line, this displayed warning will102    #             be the result of (alert % match.groups())103    patterns = zip(pattern_lines[0::4], pattern_lines[1::4],104                   pattern_lines[2::4])105    _assert_is_all_blank_lines(pattern_lines[3::4], patterns_file)106    overrides_map = _read_overrides(overrides_file)107    hooks = []108    for msgtype, regex, alert in patterns:109        regex = overrides_map.get(regex, regex)110        regex = re.compile(regex.rstrip('\n'))111        alert_function = make_alert(warnfile, msgtype.rstrip('\n'),112                                    alert.rstrip('\n'))113        hooks.append((regex, alert_function))114    return hooks115def build_alert_hooks_from_path(patterns_path, warnfile):116    """117    Same as build_alert_hooks, but accepts a path to a patterns file and118    automatically finds the corresponding site overrides file if one exists.119    """120    dirname, basename = os.path.split(patterns_path)121    site_overrides_basename = 'site_' + basename + '_overrides'122    site_overrides_path = os.path.join(dirname, site_overrides_basename)123    site_overrides_file = None124    patterns_file = open(patterns_path)125    try:126        if os.path.exists(site_overrides_path):127            site_overrides_file = open(site_overrides_path)128        try:129            return build_alert_hooks(patterns_file, warnfile,130                                     overrides_file=site_overrides_file)131        finally:132            if site_overrides_file:133                site_overrides_file.close()134    finally:135        patterns_file.close()136def process_input(137        input, logfile, log_timestamp_format=None, alert_hooks=()):138    """Continuously read lines from input stream and:139    - Write them to log, possibly prefixed by timestamp.140    - Watch for alert patterns.141    Args:142      input: file; Stream to read from.143      logfile: file; Log file to write to...

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