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How to use _get_drone_for_process method in autotest

Best Python code snippet using autotest_python
drone_manager.py
Source:drone_manager.py
...112                section, '%s_max_processes' % hostname, type=int,113                default=scheduler_config.config.max_processes_per_drone)114    def get_drones(self):115        return self._drones.itervalues()116    def _get_drone_for_process(self, process):117        return self._drones[process.hostname]118    def _get_drone_for_pidfile_id(self, pidfile_id):119        pidfile_contents = self.get_pidfile_contents(pidfile_id)120        assert pidfile_contents.process is not None121        return self._get_drone_for_process(pidfile_contents.process)122    def _drop_old_pidfiles(self):123        for pidfile_id, age in self._pidfile_age.items():124            if age > self._MAX_PIDFILE_AGE:125                del self._pidfile_age[pidfile_id]126            else:127                self._pidfile_age[pidfile_id] += 1128    def _reset(self):129        self._processes = {}130        self._process_set = set()131        self._pidfiles = {}132        self._pidfiles_second_read = {}133        self._drone_queue = []134    def _call_all_drones(self, method, *args, **kwargs):135        all_results = {}136        for drone in self.get_drones():137            all_results[drone] = drone.call(method, *args, **kwargs)138        return all_results139    def _parse_pidfile(self, drone, raw_contents):140        contents = PidfileContents()141        if not raw_contents:142            return contents143        lines = raw_contents.splitlines()144        if len(lines) > 3:145            return InvalidPidfile('Corrupt pid file (%d lines):\n%s' %146                                  (len(lines), lines))147        try:148            pid = int(lines[0])149            contents.process = Process(drone.hostname, pid)150            # if len(lines) == 2, assume we caught Autoserv between writing151            # exit_status and num_failed_tests, so just ignore it and wait for152            # the next cycle153            if len(lines) == 3:154                contents.exit_status = int(lines[1])155                contents.num_tests_failed = int(lines[2])156        except ValueError, exc:157            return InvalidPidfile('Corrupt pid file: ' + str(exc.args))158        return contents159    def _process_pidfiles(self, drone, pidfiles, store_in_dict):160        for pidfile_path, contents in pidfiles.iteritems():161            pidfile_id = PidfileId(pidfile_path)162            contents = self._parse_pidfile(drone, contents)163            store_in_dict[pidfile_id] = contents164    def _add_process(self, drone, process_info):165        process = Process(drone.hostname, int(process_info['pid']),166                          int(process_info['ppid']))167        self._process_set.add(process)168        return process169    def _add_autoserv_process(self, drone, process_info):170        assert process_info['comm'] == 'autoserv'171        # only root autoserv processes have pgid == pid172        if process_info['pgid'] != process_info['pid']:173            return174        process = self._add_process(drone, process_info)175        execution_tag = self._execution_tag_for_process(drone, process_info)176        self._processes[execution_tag] = process177    def _enqueue_drone(self, drone):178        heapq.heappush(self._drone_queue, (drone.used_capacity(), drone))179    def refresh(self):180        """181        Called at the beginning of a scheduler cycle to refresh all process182        information.183        """184        self._reset()185        self._drop_old_pidfiles()186        pidfile_paths = [pidfile_id.path for pidfile_id in self._pidfile_age]187        all_results = self._call_all_drones('refresh', pidfile_paths)188        for drone, results_list in all_results.iteritems():189            results = results_list[0]190            drone.active_processes = len(results['autoserv_processes'])191            if drone.enabled:192                self._enqueue_drone(drone)193            for process_info in results['autoserv_processes']:194                self._add_autoserv_process(drone, process_info)195            for process_info in results['parse_processes']:196                self._add_process(drone, process_info)197            self._process_pidfiles(drone, results['pidfiles'], self._pidfiles)198            self._process_pidfiles(drone, results['pidfiles_second_read'],199                                   self._pidfiles_second_read)200    def _execution_tag_for_process(self, drone, process_info):201        execution_tag = self._extract_execution_tag(process_info['args'])202        if not execution_tag:203            # this process has no execution tag - just make up something unique204            return '%s.%s' % (drone, process_info['pid'])205        return execution_tag206    def _extract_execution_tag(self, command):207        match = re.match(r'.* -P (\S+) ', command)208        if not match:209            return None210        return match.group(1)211    def execute_actions(self):212        """213        Called at the end of a scheduler cycle to execute all queued actions214        on drones.215        """216        for drone in self._drones.values():217            drone.execute_queued_calls()218        try:219             self._results_drone.execute_queued_calls()220        except error.AutoservError:221            warning = ('Results repository failed to execute calls:\n' +222                       traceback.format_exc())223            email_manager.manager.enqueue_notify_email(224                'Results repository error', warning)225            self._results_drone.clear_call_queue()226    def get_orphaned_autoserv_processes(self):227        """228        Returns a set of Process objects for orphaned processes only.229        """230        return set(process for process in self._process_set231                   if process.ppid == 1)232    def get_process_for(self, execution_tag):233        """234        Return the process object for the given execution tag.235        """236        return self._processes.get(execution_tag, None)237    def kill_process(self, process):238        """239        Kill the given process.240        """241        logging.info('killing %s', process)242        drone = self._get_drone_for_process(process)243        drone.queue_call('kill_process', process)244    def _ensure_directory_exists(self, path):245        if not os.path.exists(path):246            os.makedirs(path)247    def _extract_num_processes(self, command):248        try:249            machine_list_index = command.index('-m') + 1250        except ValueError:251            return 1252        assert machine_list_index < len(command)253        machine_list = command[machine_list_index].split(',')254        return len(machine_list)255    def total_running_processes(self):256        return sum(drone.active_processes for drone in self.get_drones())257    def max_runnable_processes(self):258        """259        Return the maximum number of processes that can be run (in a single260        execution) given the current load on drones.261        """262        if not self._drone_queue:263            # all drones disabled264            return 0265        return max(drone.max_processes - drone.active_processes266                   for _, drone in self._drone_queue)267    def _least_loaded_drone(self, drones):268        drone_to_use = drones[0]269        for drone in drones[1:]:270            if drone.used_capacity() < drone_to_use.used_capacity():271                drone_to_use = drone272        return drone_to_use273    def _choose_drone_for_execution(self, num_processes):274        # cycle through drones is order of increasing used capacity until275        # we find one that can handle these processes276        checked_drones = []277        drone_to_use = None278        while self._drone_queue:279            used_capacity, drone = heapq.heappop(self._drone_queue)280            checked_drones.append(drone)281            if drone.active_processes + num_processes <= drone.max_processes:282                drone_to_use = drone283                break284        if not drone_to_use:285            drone_summary = ','.join('%s %s/%s' % (drone.hostname,286                                                   drone.active_processes,287                                                   drone.max_processes)288                                     for drone in checked_drones)289            logging.error('No drone has capacity to handle %d processes (%s)',290                          num_processes, drone_summary)291            drone_to_use = self._least_loaded_drone(checked_drones)292        drone_to_use.active_processes += num_processes293        # refill _drone_queue294        for drone in checked_drones:295            self._enqueue_drone(drone)296        return drone_to_use297    def _substitute_working_directory_into_command(self, command,298                                                   working_directory):299        for i, item in enumerate(command):300            if item is WORKING_DIRECTORY:301                command[i] = working_directory302    def execute_command(self, command, working_directory, pidfile_name,303                        log_file=None, paired_with_pidfile=None):304        """305        Execute the given command, taken as an argv list.306        @param command: command to execute as a list.  if any item is307                WORKING_DIRECTORY, the absolute path to the working directory308                will be substituted for it.309        @param working_directory: directory in which the pidfile will be written310        @param pidfile_name: name of the pidfile this process will write311        @param log_file (optional): path (in the results repository) to hold312                command output.313        @param paired_with_pidfile (optional): a PidfileId for an314                already-executed process; the new process will execute on the315                same drone as the previous process.316        """317        working_directory = self.absolute_path(working_directory)318        if not log_file:319            log_file = self.get_temporary_path('execute')320        log_file = self.absolute_path(log_file)321        self._substitute_working_directory_into_command(command,322                                                        working_directory)323        if paired_with_pidfile:324            drone = self._get_drone_for_pidfile_id(paired_with_pidfile)325        else:326            num_processes = self._extract_num_processes(command)327            drone = self._choose_drone_for_execution(num_processes)328        logging.info("command = %s" % command)329        logging.info('log file = %s:%s' % (drone.hostname, log_file))330        self._write_attached_files(command, drone)331        drone.queue_call('execute_command', command, working_directory,332                         log_file, pidfile_name)333        pidfile_path = self.absolute_path(os.path.join(working_directory,334                                                       pidfile_name))335        pidfile_id = PidfileId(pidfile_path)336        self.register_pidfile(pidfile_id)337        return pidfile_id338    def get_pidfile_id_from(self, execution_tag, pidfile_name):339        path = os.path.join(self.absolute_path(execution_tag), pidfile_name)340        return PidfileId(path)341    def register_pidfile(self, pidfile_id):342        """343        Indicate that the DroneManager should look for the given pidfile when344        refreshing.345        """346        self._pidfile_age[pidfile_id] = 0347    def get_pidfile_contents(self, pidfile_id, use_second_read=False):348        """349        Retrieve a PidfileContents object for the given pidfile_id.  If350        use_second_read is True, use results that were read after the processes351        were checked, instead of before.352        """353        self.register_pidfile(pidfile_id)354        if use_second_read:355            pidfile_map = self._pidfiles_second_read356        else:357            pidfile_map = self._pidfiles358        return pidfile_map.get(pidfile_id, PidfileContents())359    def is_process_running(self, process):360        """361        Check if the given process is in the running process list.362        """363        return process in self._process_set364    def get_temporary_path(self, base_name):365        """366        Get a new temporary path guaranteed to be unique across all drones367        for this scheduler execution.368        """369        self._temporary_path_counter += 1370        return os.path.join(drone_utility._TEMPORARY_DIRECTORY,371                            '%s.%s' % (base_name, self._temporary_path_counter))372    def absolute_path(self, path):373        return os.path.join(self._results_dir, path)374    def _copy_results_helper(self, process, source_path, destination_path,375                             to_results_repository=False):376        full_source = self.absolute_path(source_path)377        full_destination = self.absolute_path(destination_path)378        source_drone = self._get_drone_for_process(process)379        if to_results_repository:380            source_drone.send_file_to(self._results_drone, full_source,381                                      full_destination, can_fail=True)382        else:383            source_drone.queue_call('copy_file_or_directory', full_source,384                                    full_destination)385    def copy_to_results_repository(self, process, source_path,386                                   destination_path=None):387        """388        Copy results from the given process at source_path to destination_path389        in the results repository.390        """391        if destination_path is None:392            destination_path = source_path393        self._copy_results_helper(process, source_path, destination_path,394                                  to_results_repository=True)395    def copy_results_on_drone(self, process, source_path, destination_path):396        """397        Copy a results directory from one place to another on the drone.398        """399        self._copy_results_helper(process, source_path, destination_path)400    def _write_attached_files(self, command, drone):401        execution_tag = self._extract_execution_tag(' '.join(command))402        attached_files = self._attached_files.pop(execution_tag, {})403        for file_path, contents in attached_files.iteritems():404            drone.queue_call('write_to_file', self.absolute_path(file_path),405                             contents)406    def attach_file_to_execution(self, execution_tag, file_contents,407                                 file_path=None):408        """409        When the process for execution_tag is executed, the given file contents410        will be placed in a file on the drone.  Returns the path at which the411        file will be placed.412        """413        if not file_path:414            file_path = self.get_temporary_path('attach')415        files_for_execution = self._attached_files.setdefault(execution_tag, {})416        assert file_path not in files_for_execution417        files_for_execution[file_path] = file_contents418        return file_path419    def write_lines_to_file(self, file_path, lines, paired_with_process=None):420        """421        Write the given lines (as a list of strings) to a file.  If422        paired_with_process is given, the file will be written on the drone423        running the given Process.  Otherwise, the file will be written to the424        results repository.425        """426        full_path = os.path.join(self._results_dir, file_path)427        file_contents = '\n'.join(lines) + '\n'428        if paired_with_process:429            drone = self._get_drone_for_process(paired_with_process)430        else:431            drone = self._results_drone...
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