process_controller.py 38.6 KB
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# -*- coding: utf-8 -*-

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from __future__ import (division, print_function, unicode_literals, absolute_import)
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import numpy as np
from pandas import DataFrame
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import datetime
import os
import time
from itertools import chain
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import signal
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import re
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from typing import TYPE_CHECKING
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import shutil
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from ..io import output_writer as OUT_W
from ..io import input_reader as INP_R
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from ..misc import database_tools as DB_T
from ..misc import helper_functions as HLP_F
from ..misc.path_generator import path_generator
from ..misc.logging import GMS_logger, shutdown_loggers
from ..algorithms import L1A_P, L1B_P, L1C_P, L2A_P, L2B_P, L2C_P
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from ..model.metadata import get_LayerBandsAssignment
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from ..model.gms_object import failed_GMS_object, GMS_object
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from .pipeline import (L1A_map, L1A_map_1, L1A_map_2, L1A_map_3, L1B_map, L1C_map,
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                       L2A_map, L2B_map, L2C_map)
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from ..options.config import set_config
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from .multiproc import MAP, imap_unordered
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from ..misc.definition_dicts import proc_chain, db_jobs_statistics_def
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from py_tools_ds.numeric.array import get_array_tilebounds

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if TYPE_CHECKING:
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    from collections import OrderedDict  # noqa F401  # flake8 issue
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    from typing import List  # noqa F401  # flake8 issue
    from ..options.config import GMS_config  # noqa F401  # flake8 issue
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__author__ = 'Daniel Scheffler'

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class process_controller(object):
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    def __init__(self, job_ID, **config_kwargs):
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        """gms_preprocessing process controller
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        :param job_ID:          job ID belonging to a valid database record within table 'jobs'
        :param config_kwargs:   keyword arguments to be passed to gms_preprocessing.set_config()
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        """

        # assertions
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        if not isinstance(job_ID, int):
            raise ValueError("'job_ID' must be an integer value. Got %s." % type(job_ID))
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        # set GMS configuration
        config_kwargs.update(dict(reset_status=True))
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        self.config = set_config(job_ID, **config_kwargs)  # type: GMS_config
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        # defaults
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        self._logger = None
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        self._DB_job_record = None
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        self.profiler = None
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        self.failed_objects = []
        self.L1A_newObjects = []
        self.L1B_newObjects = []
        self.L1C_newObjects = []
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        self.L2A_newObjects = []
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        self.L2A_tiles = []
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        self.L2B_newObjects = []
        self.L2C_newObjects = []

        self.summary_detailed = None
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        self.summary_quick = None
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        # check if process_controller is executed by debugger
        # isdebugging = 1 if True in [frame[1].endswith("pydevd.py") for frame in inspect.stack()] else False
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        # if isdebugging:  # override the existing settings in order to get write access everywhere
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        #    pass

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        # called_from_iPyNb = 1 if 'ipykernel/__main__.py' in sys.argv[0] else 0
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        self.logger.info('Process Controller initialized for job ID %s (comment: %s).'
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                         % (self.config.ID, self.DB_job_record.comment))
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        if self.config.delete_old_output:
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            self.logger.info('Deleting previously processed data...')
            self.DB_job_record.delete_procdata_of_entire_job(force=True)
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    @property
    def logger(self):
        if self._logger and self._logger.handlers[:]:
            return self._logger
        else:
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            self._logger = GMS_logger('log__%s' % self.config.ID,
                                      path_logfile=os.path.join(self.config.path_job_logs, '%s.log' % self.config.ID),
                                      log_level=self.config.log_level, append=False)
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            return self._logger

    @logger.setter
    def logger(self, logger):
        self._logger = logger

    @logger.deleter
    def logger(self):
        if self._logger not in [None, 'not set']:
            self.logger.close()
            self.logger = None

    @property
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    def DB_job_record(self):
        if self._DB_job_record:
            return self._DB_job_record
        else:
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            self._DB_job_record = DB_T.GMS_JOB(self.config.conn_database)
            self._DB_job_record.from_job_ID(self.config.ID)
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            return self._DB_job_record
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    @DB_job_record.setter
    def DB_job_record(self, value):
        self._DB_job_record = value
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    @property
    def sceneids_failed(self):
        return [obj.scene_ID for obj in self.failed_objects]
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    def _add_local_availability_single_dataset(self, dataset):
        # type: (OrderedDict) -> OrderedDict
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        # TODO revise this function
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        # query the database and get the last written processing level and LayerBandsAssignment
        DB_match = DB_T.get_info_from_postgreSQLdb(
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            self.config.conn_database, 'scenes_proc', ['proc_level', 'layer_bands_assignment'],
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            dict(sceneid=dataset['scene_ID']))
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        # get the corresponding logfile
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        path_logfile = path_generator(dataset).get_path_logfile(merged_subsystems=False)
        path_logfile_merged_ss = path_generator(dataset).get_path_logfile(merged_subsystems=True)
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        def get_AllWrittenProcL_dueLog(path_log):  # TODO replace this by database query + os.path.exists
            """Returns all processing level that have been successfully written according to logfile."""

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            if not os.path.exists(path_log):
                if path_log == path_logfile:  # path_logfile_merged_ss has already been searched
                    self.logger.info("No logfile named '%s' found for %s at %s. Dataset has to be reprocessed."
                                     % (os.path.basename(path_log), dataset['entity_ID'], os.path.dirname(path_log)))
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                AllWrittenProcL_dueLog = []
            else:
                logfile = open(path_log, 'r').read()
                AllWrittenProcL_dueLog = re.findall(":*(\S*\s*) data successfully saved.", logfile, re.I)
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                if not AllWrittenProcL_dueLog and path_logfile == path_logfile_merged_ss:  # AllWrittenProcL_dueLog = []
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                    self.logger.info('%s: According to logfile no completely processed data exist at any '
                                     'processing level. Dataset has to be reprocessed.' % dataset['entity_ID'])
                else:
                    AllWrittenProcL_dueLog = HLP_F.sorted_nicely(list(set(AllWrittenProcL_dueLog)))
            return AllWrittenProcL_dueLog

        # check if there are not multiple database records for this dataset
        if len(DB_match) == 1 or DB_match == [] or DB_match == 'database connection fault':

            # get all processing level that have been successfully written
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            # NOTE: first check for merged subsystem datasets because they have hiver processing levels
            AllWrittenProcL = get_AllWrittenProcL_dueLog(path_logfile_merged_ss)
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            if not AllWrittenProcL:
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                AllWrittenProcL = get_AllWrittenProcL_dueLog(path_logfile)
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            else:
                # A L2A+ dataset with merged subsystems has been found. Use that logfile.
                path_logfile = path_logfile_merged_ss
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            dataset['proc_level'] = None  # default (dataset has to be reprocessed)

            # loop through all the found proc. levels and find the one that fulfills all requirements
            for ProcL in reversed(AllWrittenProcL):
                if dataset['proc_level']:
                    break  # proc_level found; no further searching for lower proc_levels
                assumed_path_GMS_file = '%s_%s.gms' % (os.path.splitext(path_logfile)[0], ProcL)

                # check if there is also a corresponding GMS_file on disk
                if os.path.isfile(assumed_path_GMS_file):
                    GMS_file_dict = INP_R.GMSfile2dict(assumed_path_GMS_file)
                    target_LayerBandsAssignment = \
                        get_LayerBandsAssignment(dict(
                            image_type=dataset['image_type'],
                            Satellite=dataset['satellite'],
                            Sensor=dataset['sensor'],
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                            Subsystem=dataset['subsystem'] if path_logfile != path_logfile_merged_ss else '',
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                            proc_level=ProcL,  # must be respected because LBA changes after atm. Corr.
                            dataset_ID=dataset['dataset_ID'],
                            logger=None), nBands=(1 if dataset['sensormode'] == 'P' else None))

                    # check if the LayerBandsAssignment of the written dataset on disk equals the
                    # desired LayerBandsAssignment
                    if target_LayerBandsAssignment == GMS_file_dict['LayerBandsAssignment']:

                        # update the database record if the dataset could not be found in database
                        if DB_match == [] or DB_match == 'database connection fault':
                            self.logger.info('The dataset %s is not included in the database of processed data but'
                                             ' according to logfile %s has been written successfully. Recreating '
                                             'missing database entry.' % (dataset['entity_ID'], ProcL))
                            DB_T.data_DB_updater(GMS_file_dict)

                            dataset['proc_level'] = ProcL

                        # if the dataset could be found in database
                        elif len(DB_match) == 1:
                            try:
                                self.logger.info('Found a matching %s dataset for %s. Processing skipped until %s.'
                                                 % (ProcL, dataset['entity_ID'],
                                                    proc_chain[proc_chain.index(ProcL) + 1]))
                            except IndexError:
                                self.logger.info('Found a matching %s dataset for %s. Processing already done.'
                                                 % (ProcL, dataset['entity_ID']))

                            if DB_match[0][0] == ProcL:
                                dataset['proc_level'] = DB_match[0][0]
                            else:
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                                dataset['proc_level'] = ProcL
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                    else:
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                        self.logger.info('Found a matching %s dataset for %s but with a different '
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                                         'LayerBandsAssignment (desired: %s; found %s). Dataset has to be reprocessed.'
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                                         % (ProcL, dataset['entity_ID'],
                                            target_LayerBandsAssignment, GMS_file_dict['LayerBandsAssignment']))
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                else:
                    self.logger.info('%s for dataset %s has been written due to logfile but no corresponding '
                                     'dataset has been found.' % (ProcL, dataset['entity_ID']) +
                                     ' Searching for lower processing level...'
                                     if AllWrittenProcL.index(ProcL) != 0 else '')
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        elif len(DB_match) > 1:
            self.logger.info('According to database there are multiple matches for the dataset %s. Dataset has to '
                             'be reprocessed.' % dataset['entity_ID'])
            dataset['proc_level'] = None
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        else:
            dataset['proc_level'] = None
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        return dataset
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    def add_local_availability(self, datasets):
        # type: (List[OrderedDict]) -> List[OrderedDict]
        """Check availability of all subsets per scene and processing level.
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        NOTE: The processing level of those scenes, where not all subsystems are available in the same processing level
              is reset.

        :param datasets:    List of one OrderedDict per subsystem as generated by CFG.data_list
        """
        datasets = [self._add_local_availability_single_dataset(ds) for ds in datasets]
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        datasets_validated = []
        datasets_grouped = HLP_F.group_dicts_by_key(datasets, key='scene_ID')
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        for ds_group in datasets_grouped:
            proc_lvls = [ds['proc_level'] for ds in ds_group]
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            if not len(list(set(proc_lvls))) == 1:
                # reset processing level of those scenes where not all subsystems are available
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                self.logger.info('%s: Found already processed subsystems at different processing levels %s. '
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                                 'Dataset has to be reprocessed to avoid errors.'
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                                 % (ds_group[0]['entity_ID'], proc_lvls))
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                for ds in ds_group:
                    ds['proc_level'] = None
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                    datasets_validated.append(ds)
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            else:
                datasets_validated.extend(ds_group)
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        return datasets_validated
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    @staticmethod
    def _is_inMEM(GMS_objects, dataset):
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        # type: (list, OrderedDict) -> bool
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        """Checks whether a dataset within a dataset list has been processed in the previous processing level.
        :param GMS_objects: <list> a list of GMS objects that has been recently processed
        :param dataset:     <collections.OrderedDict> as generated by L0A_P.get_data_list_of_current_jobID()
        """
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        # check if the scene ID of the given dataset is in the scene IDs of the previously processed datasets
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        return dataset['scene_ID'] in [obj.scene_ID for obj in GMS_objects]

    def _get_processor_data_list(self, procLvl, prevLvl_objects=None):
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        """Returns a list of datasets that have to be read from disk and then processed by a specific processor.
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        :param procLvl:
        :param prevLvl_objects:
        :return:
        """
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        def is_procL_lower(dataset):
            return HLP_F.is_proc_level_lower(dataset['proc_level'], target_lvl=procLvl)
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        if prevLvl_objects is None:
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            return [dataset for dataset in self.config.data_list if is_procL_lower(dataset)]  # TODO generator?
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        else:
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            return [dataset for dataset in self.config.data_list if is_procL_lower(dataset) and
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                    not self._is_inMEM(prevLvl_objects + self.failed_objects, dataset)]
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    def get_DB_objects(self, procLvl, prevLvl_objects=None, parallLev=None, blocksize=None):
        """
        Returns a list of GMS objects for datasets available on disk that have to be processed by the current processor.

        :param procLvl:         <str> processing level oof the current processor
        :param prevLvl_objects: <list> of in-mem GMS objects produced by the previous processor
        :param parallLev:       <str> parallelization level ('scenes' or 'tiles')
                                -> defines if full cubes or blocks are to be returned
        :param blocksize:       <tuple> block size in case blocks are to be returned, e.g. (2000,2000)
        :return:
        """
        # TODO get prevLvl_objects automatically from self
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        if procLvl == 'L1A':
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            return []
        else:
            # handle input parameters
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            parallLev = parallLev or self.config.parallelization_level
            blocksize = blocksize or self.config.tiling_block_size_XY
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            prevLvl = proc_chain[proc_chain.index(procLvl) - 1]  # TODO replace by enum
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            # get GMSfile list
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            dataset_dicts = self._get_processor_data_list(procLvl, prevLvl_objects)
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            GMSfile_list_prevLvl_inDB = INP_R.get_list_GMSfiles(dataset_dicts, prevLvl)

            # create GMS objects from disk with respect to parallelization level and block size
            if parallLev == 'scenes':
                # get input parameters for creating GMS objects as full cubes
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                work = [[GMS, ['cube', None]] for GMS in GMSfile_list_prevLvl_inDB]
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            else:
                # define tile positions and size
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                def get_tilepos_list(GMSfile):
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                    return get_array_tilebounds(array_shape=INP_R.GMSfile2dict(GMSfile)['shape_fullArr'],
                                                tile_shape=blocksize)
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                # get input parameters for creating GMS objects as blocks
                work = [[GMSfile, ['block', tp]] for GMSfile in GMSfile_list_prevLvl_inDB
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                        for tp in get_tilepos_list(GMSfile)]
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            # create GMS objects for the found files on disk
            # NOTE: DON'T multiprocess that with MAP(GMS_object(*initargs).from_disk, work)
            # in case of multiple subsystems GMS_object(*initargs) would always point to the same object in memory
            # -> subsystem attribute will be overwritten each time
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            def init_GMS_obj(): return HLP_F.parentObjDict[prevLvl](*HLP_F.initArgsDict[prevLvl])
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            DB_objs = [init_GMS_obj().from_disk(tuple_GMS_subset=w) for w in work]  # init

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            if DB_objs:
                DB_objs = list(chain.from_iterable(DB_objs)) if list in [type(i) for i in DB_objs] else list(DB_objs)

            return DB_objs

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    def run_all_processors_OLD(self, custom_data_list=None):
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        """
        Run all processors at once.
        """
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        signal.signal(signal.SIGINT, self.stop)  # enable clean shutdown possibility
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        # noinspection PyBroadException
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        try:
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            if self.config.profiling:
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                from pyinstrument import Profiler
                self.profiler = Profiler()  # or Profiler(use_signal=False), see below
                self.profiler.start()

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            self.logger.info('Execution of entire GeoMultiSens pre-processing chain started for job ID %s...'
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                             % self.config.ID)
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            self.DB_job_record.reset_job_progress()  # updates attributes of DB_job_record and related DB entry
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            self.config.status = 'running'
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            self.update_DB_job_record()  # TODO implement that into job.status.setter
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            self.failed_objects = []

            # get list of datasets to be processed
            if custom_data_list:
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                self.config.data_list = custom_data_list
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            # add local availability
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            self.config.data_list = self.add_local_availability(self.config.data_list)
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            self.update_DB_job_statistics(self.config.data_list)
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            self.L1A_processing()
            self.L1B_processing()
            self.L1C_processing()
            self.L2A_processing()
            self.L2B_processing()
            self.L2C_processing()

            # create summary
            self.create_job_summary()

            self.logger.info('Execution finished.')
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            # TODO implement failed_with_warnings:
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            self.config.status = 'finished' if not self.failed_objects else 'finished_with_errors'
            self.config.end_time = datetime.datetime.now()
            self.config.computation_time = self.config.end_time - self.config.start_time
            self.logger.info('Time for execution: %s' % self.config.computation_time)
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            # update database entry of current job
            self.update_DB_job_record()

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            if self.config.profiling:
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                self.profiler.stop()
                print(self.profiler.output_text(unicode=True, color=True))

            shutdown_loggers()

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        except Exception:  # noqa E722  # bare except
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            if self.config.profiling:
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                self.profiler.stop()
                print(self.profiler.output_text(unicode=True, color=True))

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            self.config.status = 'failed'
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            self.update_DB_job_record()

            if not self.config.disable_exception_handler:
                self.logger.error('Execution failed with an error:', exc_info=True)
                shutdown_loggers()
            else:
                self.logger.error('Execution failed with an error:')
                shutdown_loggers()
                raise

    def run_all_processors(self, custom_data_list=None):
        signal.signal(signal.SIGINT, self.stop)  # enable clean shutdown possibility

        # noinspection PyBroadException
        try:
            if self.config.profiling:
                from pyinstrument import Profiler
                self.profiler = Profiler()  # or Profiler(use_signal=False), see below
                self.profiler.start()

            self.logger.info('Execution of entire GeoMultiSens pre-processing chain started for job ID %s...'
                             % self.config.ID)
            self.DB_job_record.reset_job_progress()  # updates attributes of DB_job_record and related DB entry
            self.config.status = 'running'
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            GMS_object.proc_status_all_GMSobjs.clear()  # reset
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            self.update_DB_job_record()  # TODO implement that into config.status.setter

            self.failed_objects = []

            # get list of datasets to be processed
            if custom_data_list:
                self.config.data_list = custom_data_list

            # add local availability
            self.config.data_list = self.add_local_availability(self.config.data_list)
            self.update_DB_job_statistics(self.config.data_list)

            # group dataset dicts by sceneid
            dataset_groups = HLP_F.group_dicts_by_key(self.config.data_list, key='scene_ID')

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            # RUN PREPROCESSING
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            from .pipeline import run_complete_preprocessing
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            GMS_objs = imap_unordered(run_complete_preprocessing, dataset_groups, flatten_output=True)
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            # separate results into successful and failed objects
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            def assign_attr(tgt_procL):
                return [obj for obj in GMS_objs if isinstance(obj, GMS_object) and obj.proc_level == tgt_procL]

            self.L1A_newObjects = assign_attr('L1A')
            self.L1B_newObjects = assign_attr('L1B')
            self.L1C_newObjects = assign_attr('L1C')
            self.L2A_newObjects = assign_attr('L2A')
            self.L2B_newObjects = assign_attr('L2B')
            self.L2C_newObjects = assign_attr('L2C')
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            self.failed_objects = [obj for obj in GMS_objs if isinstance(obj, failed_GMS_object)]

            # create summary
            self.create_job_summary()

            self.logger.info('Execution finished.')
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            # TODO implement failed_with_warnings
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Daniel Scheffler committed
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            self.config.status = 'finished' if not self.failed_objects else 'finished_with_errors'
            self.config.end_time = datetime.datetime.now()
            self.config.computation_time = self.config.end_time - self.config.start_time
            self.logger.info('Time for execution: %s' % self.config.computation_time)

            # update database entry of current job
            self.update_DB_job_record()

            if self.config.profiling:
                self.profiler.stop()
                print(self.profiler.output_text(unicode=True, color=True))

            shutdown_loggers()

        except Exception:  # noqa E722  # bare except
            if self.config.profiling:
                self.profiler.stop()
                print(self.profiler.output_text(unicode=True, color=True))

            self.config.status = 'failed'
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            self.update_DB_job_record()

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            if not self.config.disable_exception_handler:
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                self.logger.error('Execution failed with an error:', exc_info=True)
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                shutdown_loggers()
            else:
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                self.logger.error('Execution failed with an error:')
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                shutdown_loggers()
                raise
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    def stop(self, signum, frame):
        """Interrupt the running process controller gracefully."""
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        self.config.status = 'canceled'
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        self.update_DB_job_record()

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        self.logger.warning('Process controller stopped by user.')
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        del self.logger
        shutdown_loggers()
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        # clear any temporary files
        tempdir = os.path.join(self.config.path_tempdir + 'GeoMultiSens_*')
        self.logger.warning('Deleting temporary directory %s.' % tempdir)
        shutil.rmtree(tempdir)

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        raise KeyboardInterrupt  # terminate execution and show traceback
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    def benchmark(self):
        """
        Run a benchmark.
        """
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        data_list_bench = self.config.data_list
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        for count_datasets in range(len(data_list_bench)):
            t_processing_all_runs, t_IO_all_runs = [], []
            for count_run in range(10):
                current_data_list = data_list_bench[0:count_datasets + 1]
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                if os.path.exists(self.config.path_database):
                    os.remove(self.config.path_database)
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                t_start = time.time()
                self.run_all_processors(current_data_list)
                t_processing_all_runs.append(time.time() - t_start)
                t_IO_all_runs.append(globals()['time_IO'])

            assert current_data_list, 'Empty data list.'
            OUT_W.write_global_benchmark_output(t_processing_all_runs, t_IO_all_runs, current_data_list)

    def L1A_processing(self):
        """
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        Run Level 1A processing: Data import and metadata homogenization
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        """
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        if self.config.exec_L1AP[0]:
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            self.logger.info('\n\n##### Level 1A Processing started - raster format and metadata homogenization ####\n')
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            datalist_L1A_P = self._get_processor_data_list('L1A')

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            if self.config.parallelization_level == 'scenes':
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                # map
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                L1A_resObjects = MAP(L1A_map, datalist_L1A_P, CPUs=12)
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            else:  # tiles
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                all_L1A_tiles_map1 = MAP(L1A_map_1, datalist_L1A_P,
                                         flatten_output=True)  # map_1 # merge results to new list of splits
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                L1A_obj_tiles = MAP(L1A_map_2, all_L1A_tiles_map1)  # map_2
                grouped_L1A_Tiles = HLP_F.group_objects_by_attributes(
                    L1A_obj_tiles, 'scene_ID', 'subsystem')  # group results
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                L1A_objects = MAP(L1A_P.L1A_object().from_tiles, grouped_L1A_Tiles)  # reduce
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                L1A_resObjects = MAP(L1A_map_3, L1A_objects)  # map_3
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            self.L1A_newObjects = [obj for obj in L1A_resObjects if isinstance(obj, L1A_P.L1A_object)]
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            self.failed_objects += [obj for obj in L1A_resObjects if isinstance(obj, failed_GMS_object) and
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                                    obj.scene_ID not in self.sceneids_failed]

        return self.L1A_newObjects

    def L1B_processing(self):
        """
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        Run Level 1B processing: calculation of geometric shifts
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        """
        # TODO implement check for running spatial index mediator server
        # run on full cubes

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        if self.config.exec_L1BP[0]:
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            self.logger.info('\n\n####### Level 1B Processing started - detection of geometric displacements #######\n')
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            L1A_DBObjects = self.get_DB_objects('L1B', self.L1A_newObjects, parallLev='scenes')
            L1A_Instances = self.L1A_newObjects + L1A_DBObjects  # combine newly and earlier processed L1A data
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            L1B_resObjects = MAP(L1B_map, L1A_Instances)
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            self.L1B_newObjects = [obj for obj in L1B_resObjects if isinstance(obj, L1B_P.L1B_object)]
            self.failed_objects += [obj for obj in L1B_resObjects if isinstance(obj, failed_GMS_object) and
                                    obj.scene_ID not in self.sceneids_failed]
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        return self.L1B_newObjects

    def L1C_processing(self):
        """
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        Run Level 1C processing: atmospheric correction
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        """
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        if self.config.exec_L1CP[0]:
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            self.logger.info('\n\n############## Level 1C Processing started - atmospheric correction ##############\n')
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            if self.config.parallelization_level == 'scenes':
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                L1B_DBObjects = self.get_DB_objects('L1C', self.L1B_newObjects)
                L1B_Instances = self.L1B_newObjects + L1B_DBObjects  # combine newly and earlier processed L1B data

                # group by scene ID (all subsystems belonging to the same scene ID must be processed together)
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                grouped_L1B_Instances = HLP_F.group_objects_by_attributes(L1B_Instances, 'scene_ID')
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                L1C_resObjects = MAP(L1C_map, grouped_L1B_Instances, flatten_output=True,
                                     CPUs=15)  # FIXME CPUs set to 15 for testing
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            else:  # tiles
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                raise NotImplementedError("Tiled processing is not yet completely implemented for L1C processor. Use "
                                          "parallelization level 'scenes' instead!")
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                # blocksize = (5000, 5000)
                # """if newly processed L1A objects are present: cut them into tiles"""
                # L1B_newTiles = []
                # if self.L1B_newObjects:
                #     tuples_obj_blocksize = [(obj, blocksize) for obj in self.L1B_newObjects]
                #     L1B_newTiles = MAP(HLP_F.cut_GMS_obj_into_blocks, tuples_obj_blocksize, flatten_output=True)
                #
                # """combine newly and earlier processed L1B data"""
                # L1B_newDBTiles = self.get_DB_objects('L1C', self.L1B_newObjects, blocksize=blocksize)
                # L1B_tiles = L1B_newTiles + L1B_newDBTiles
                #
                # # TODO merge subsets of S2/Aster in order to provide all bands for atm.correction
                # L1C_tiles = MAP(L1C_map, L1B_tiles)
                # grouped_L1C_Tiles = \
                #     HLP_F.group_objects_by_attributes(L1C_tiles, 'scene_ID', 'subsystem')  # group results
                # [L1C_tiles_group[0].delete_tempFiles() for L1C_tiles_group in grouped_L1C_Tiles]
                # L1C_resObjects = MAP(L1C_P.L1C_object().from_tiles, grouped_L1C_Tiles)  # reduce

            self.L1C_newObjects = [obj for obj in L1C_resObjects if isinstance(obj, L1C_P.L1C_object)]
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            self.failed_objects += [obj for obj in L1C_resObjects if isinstance(obj, failed_GMS_object) and
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                                    obj.scene_ID not in self.sceneids_failed]

        return self.L1C_newObjects

    def L2A_processing(self):
        """
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        """
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        if self.config.exec_L2AP[0]:
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            self.logger.info(
                '\n\n#### Level 2A Processing started - shift correction / geometric homogenization ####\n')
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            """combine newly and earlier processed L1C data"""
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            L1C_DBObjects = self.get_DB_objects('L2A', self.L1C_newObjects, parallLev='scenes')
            L1C_Instances = self.L1C_newObjects + L1C_DBObjects  # combine newly and earlier processed L1C data
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            # group by scene ID (all subsystems belonging to the same scene ID must be processed together)
            grouped_L1C_Instances = HLP_F.group_objects_by_attributes(L1C_Instances, 'scene_ID')

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            L2A_resTiles = MAP(L2A_map, grouped_L1C_Instances, flatten_output=True)
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            self.L2A_tiles = [obj for obj in L2A_resTiles if isinstance(obj, L2A_P.L2A_object)]
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            self.failed_objects += [obj for obj in L2A_resTiles if isinstance(obj, failed_GMS_object) and
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                                    obj.scene_ID not in self.sceneids_failed]

        return self.L2A_tiles

    def L2B_processing(self):
        """
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        Run Level 2B processing: spectral homogenization
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        """
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        if self.config.exec_L2BP[0]:
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            self.logger.info('\n\n############# Level 2B Processing started - spectral homogenization ##############\n')
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            if self.config.parallelization_level == 'scenes':
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                # don't know if scenes makes sense in L2B processing because full objects are very big!
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                """if newly processed L2A objects are present: merge them to scenes"""
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                grouped_L2A_Tiles = HLP_F.group_objects_by_attributes(self.L2A_tiles, 'scene_ID')  # group results
                # reduce # will be too slow because it has to pickle back really large L2A_newObjects
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                # L2A_newObjects  = MAP(HLP_F.merge_GMS_tiles_to_GMS_obj, grouped_L2A_Tiles)
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                L2A_newObjects = [L2A_P.L2A_object().from_tiles(tileList) for tileList in grouped_L2A_Tiles]
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                """combine newly and earlier processed L2A data"""
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                L2A_DBObjects = self.get_DB_objects('L2B', self.L2A_tiles)
                L2A_Instances = L2A_newObjects + L2A_DBObjects  # combine newly and earlier processed L2A data
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                L2B_resObjects = MAP(L2B_map, L2A_Instances)
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            else:  # tiles
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                L2A_newTiles = self.L2A_tiles  # tiles have the block size specified in L2A_map_2
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                """combine newly and earlier processed L2A data"""
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                blocksize = (2048, 2048)  # must be equal to the blocksize of L2A_newTiles specified in L2A_map_2
                L2A_newDBTiles = self.get_DB_objects('L2B', self.L2A_tiles, blocksize=blocksize)
                L2A_tiles = L2A_newTiles + L2A_newDBTiles
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                L2B_tiles = MAP(L2B_map, L2A_tiles)
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                grouped_L2B_Tiles = \
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                    HLP_F.group_objects_by_attributes(L2B_tiles,
                                                      'scene_ID')  # group results # FIXME nötig an dieser Stelle?
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                [L2B_tiles_group[0].delete_tempFiles() for L2B_tiles_group in grouped_L2B_Tiles]

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                L2B_resObjects = [L2B_P.L2B_object().from_tiles(tileList) for tileList in grouped_L2B_Tiles]
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            self.L2B_newObjects = [obj for obj in L2B_resObjects if isinstance(obj, L2B_P.L2B_object)]
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            self.failed_objects += [obj for obj in L2B_resObjects if isinstance(obj, failed_GMS_object) and
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                                    obj.scene_ID not in self.sceneids_failed]

        return self.L2B_newObjects

    def L2C_processing(self):
        """
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        Run Level 2C processing: accurracy assessment and MGRS tiling
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        """
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        # FIXME only parallelization_level == 'scenes' implemented
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        if self.config.exec_L2CP[0]:
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            self.logger.info('\n\n########## Level 2C Processing started - calculation of quality layers ###########\n')
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            """combine newly and earlier processed L2A data"""
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            L2B_DBObjects = self.get_DB_objects('L2C', self.L2B_newObjects, parallLev='scenes')
            L2B_Instances = self.L2B_newObjects + L2B_DBObjects  # combine newly and earlier processed L2A data
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            L2C_resObjects = MAP(L2C_map, L2B_Instances, CPUs=8)  # FIXME 8 workers due to heavy IO
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            self.L2C_newObjects = [obj for obj in L2C_resObjects if isinstance(obj, L2C_P.L2C_object)]
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            self.failed_objects += [obj for obj in L2C_resObjects if isinstance(obj, failed_GMS_object) and
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                                    obj.scene_ID not in self.sceneids_failed]

        return self.L2C_newObjects

    def update_DB_job_record(self):
        """
        Update the database records of the current job (table 'jobs').
        """
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        # TODO move this method to config.Job
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        # update 'failed_sceneids' column of job record within jobs table
        sceneids_failed = list(set([obj.scene_ID for obj in self.failed_objects]))
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        DB_T.update_records_in_postgreSQLdb(
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            self.config.conn_database, 'jobs',
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            {'failed_sceneids': sceneids_failed,  # update 'failed_sceneids' column
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             'finishtime': self.config.end_time,  # add job finish timestamp
             'status': self.config.status},  # update 'job_status' column
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            {'id': self.config.ID}, timeout=30000)
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    def update_DB_job_statistics(self, usecase_datalist):
        """
        Update job statistics of the running job in the database.
        """
        # TODO move this method to config.Job
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        already_updated_IDs = []
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        for ds in usecase_datalist:
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            if ds['proc_level'] is not None and ds['scene_ID'] not in already_updated_IDs:
                # update statistics column of jobs table
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                    self.config.conn_database, 'jobs', 'statistics', cond_dict={'id': self.config.ID},
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                    idx_val2increment=db_jobs_statistics_def[ds['proc_level']])

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                # avoid double updating in case of subsystems belonging to the same scene ID
                already_updated_IDs.append(ds['scene_ID'])

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    def create_job_summary(self):
        """
        Create job success summary
        """
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        # get objects with highest requested processing level
        highest_procL_Objs = []
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        for pL in reversed(proc_chain):
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            if getattr(self.config, 'exec_%sP' % pL)[0]:
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                highest_procL_Objs = getattr(self, '%s_newObjects' % pL) if pL != 'L2A' else self.L2A_tiles
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                break

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        gms_objects2summarize = highest_procL_Objs + self.failed_objects
        if gms_objects2summarize:
            # create summaries
            detailed_JS, quick_JS = get_job_summary(gms_objects2summarize)
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            detailed_JS.to_excel(os.path.join(self.config.path_job_logs, '%s_summary.xlsx' % self.config.ID))
            detailed_JS.to_csv(os.path.join(self.config.path_job_logs, '%s_summary.csv' % self.config.ID), sep='\t')
            self.logger.info('\nQUICK JOB SUMMARY (ID %s):\n' % self.config.ID + quick_JS.to_string())
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            self.summary_detailed = detailed_JS
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            self.summary_quick = quick_JS
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        else:
            # TODO implement check if proc level with lowest procL has to be processed at all (due to job.exec_L1X)
            # TODO otherwise it is possible that get_job_summary receives an empty list
            self.logger.warning("Job summary skipped because get_job_summary() received an empty list of GMS objects.")
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    def clear_lists_procObj(self):
        self.failed_objects = []
        self.L1A_newObjects = []
        self.L1B_newObjects = []
        self.L1C_newObjects = []
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        self.L2A_tiles = []
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        self.L2B_newObjects = []
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        self.L2C_newObjects = []


def get_job_summary(list_GMS_objects):
    # get detailed job summary
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    DJS_cols = ['GMS_object', 'scene_ID', 'entity_ID', 'satellite', 'sensor', 'subsystem', 'image_type', 'proc_level',
                'arr_shape', 'arr_pos', 'failedMapper', 'ExceptionType', 'ExceptionValue', 'ExceptionTraceback']
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    DJS = DataFrame(columns=DJS_cols)
    DJS['GMS_object'] = list_GMS_objects

    for col in DJS_cols[1:]:
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        def get_val(obj): return getattr(obj, col) if hasattr(obj, col) else None
        DJS[col] = list(DJS['GMS_object'].map(get_val))
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    del DJS['GMS_object']
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    DJS = DJS.sort_values(by=['satellite', 'sensor', 'entity_ID'])
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    # get quick job summary
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    QJS = DataFrame(columns=['satellite', 'sensor', 'count', 'proc_successfully', 'proc_failed'])
    all_sat, all_sen = zip(*[i.split('__') for i in (np.unique(DJS['satellite'] + '__' + DJS['sensor']))])
    QJS['satellite'] = all_sat
    QJS['sensor'] = all_sen
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    # count objects with the same satellite/sensor/sceneid combination
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    QJS['count'] = [len(DJS[(DJS['satellite'] == sat) & (DJS['sensor'] == sen)]['scene_ID'].unique())
                    for sat, sen in zip(all_sat, all_sen)]
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    QJS['proc_successfully'] = [len(DJS[(DJS['satellite'] == sat) &
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                                        (DJS['sensor'] == sen) &
                                        (DJS['failedMapper'].isnull())]['scene_ID'].unique())
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                                for sat, sen in zip(all_sat, all_sen)]
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    QJS['proc_failed'] = QJS['count'] - QJS['proc_successfully']
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    QJS = QJS.sort_values(by=['satellite', 'sensor'])
    return DJS, QJS