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How to use _decrement_running_processes method in autotest

Best Python code snippet using autotest_python

postjob_task.py

Source:postjob_task.py

...96    def _increment_running_processes(cls):97        cls._num_running_processes += 198        cls._gauge_metrics()99    @classmethod100    def _decrement_running_processes(cls):101        cls._num_running_processes -= 1102        cls._gauge_metrics()103    @classmethod104    def _max_processes(cls):105        raise NotImplementedError106    @classmethod107    def _can_run_new_process(cls):108        return cls._num_running_processes < cls._max_processes()109    def _process_started(self):110        return bool(self.monitor)111    def tick(self):112        # override tick to keep trying to start until the process count goes113        # down and we can, at which point we revert to default behavior114        if self._process_started():115            super(SelfThrottledPostJobTask, self).tick()116        else:117            self._try_starting_process()118    def run(self):119        # override run() to not actually run unless we can120        self._try_starting_process()121    @classmethod122    def _notify_process_limit_hit(cls):123        """Send an email to notify that process limit is hit."""124        if cls._notification_on:125            subject = '%s: hitting max process limit.' % cls.__name__126            message = ('Running processes/Max processes: %d/%d'127                       % (cls._num_running_processes, cls._max_processes()))128            email_manager.manager.enqueue_notify_email(subject, message)129            cls._notification_on = False130    @classmethod131    def _reset_notification_switch_if_necessary(cls):132        """Reset _notification_on if necessary.133        Set _notification_on to True on the following cases:134        1) If the limit of max processes configuration changes;135        2) If _notification_on is False and the number of running processes136           drops to lower than a level defined in REVIVE_NOTIFICATION_THRESHOLD.137        """138        if cls._last_known_max_processes != cls._max_processes():139            cls._notification_on = True140            cls._last_known_max_processes = cls._max_processes()141            return142        percentage = float(cls._num_running_processes) / cls._max_processes()143        if (not cls._notification_on and144            percentage < cls.REVIVE_NOTIFICATION_THRESHOLD):145            cls._notification_on = True146    def _try_starting_process(self):147        self._reset_notification_switch_if_necessary()148        if not self._can_run_new_process():149            self._notify_process_limit_hit()150            return151        # actually run the command152        super(SelfThrottledPostJobTask, self).run()153        if self._process_started():154            self._increment_running_processes()155    def finished(self, success):156        super(SelfThrottledPostJobTask, self).finished(success)157        if self._process_started():158            self._decrement_running_processes()159class GatherLogsTask(PostJobTask):160    """161    Task responsible for162    * gathering uncollected logs (if Autoserv crashed hard or was killed)163    * copying logs to the results repository164    * spawning CleanupTasks for hosts, if necessary165    * spawning a FinalReparseTask for the job166    * setting the final status of the host, directly or through a cleanup167    """168    def __init__(self, queue_entries, recover_run_monitor=None):169        self._job = queue_entries[0].job170        super(GatherLogsTask, self).__init__(171            queue_entries, log_file_name='.collect_crashinfo.log')172        self._set_ids(queue_entries=queue_entries)...

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