1 | """JSON interface class.""" |
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2 | |||
3 | import sys |
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4 | |||
5 | from glances.exports.export import GlancesExport |
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6 | from glances.globals import json_dumps, listkeys |
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7 | from glances.logger import logger |
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8 | |||
9 | |||
10 | class Export(GlancesExport): |
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11 | """This class manages the JSON export module.""" |
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12 | |||
13 | def __init__(self, config=None, args=None): |
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14 | """Init the JSON export IF.""" |
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15 | super().__init__(config=config, args=args) |
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16 | |||
17 | # JSON file name |
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18 | self.json_filename = args.export_json_file |
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19 | |||
20 | # Set the JSON output file |
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21 | try: |
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22 | self.json_file = open(self.json_filename, 'w') |
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23 | self.json_file.close() |
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24 | except OSError as e: |
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25 | logger.critical(f"Cannot create the JSON file: {e}") |
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26 | sys.exit(2) |
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27 | |||
28 | logger.info(f"Exporting stats to file: {self.json_filename}") |
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29 | |||
30 | self.export_enable = True |
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31 | |||
32 | # Buffer for dict of stats |
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33 | self.buffer = {} |
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34 | |||
35 | def exit(self): |
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36 | """Close the JSON file.""" |
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37 | logger.debug(f"Finalise export interface {self.export_name}") |
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38 | self.json_file.close() |
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39 | |||
40 | def export(self, name, columns, points): |
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41 | """Export the stats to the JSON file.""" |
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42 | |||
43 | # Check for completion of loop for all exports |
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44 | if name == self.last_exported_list()[0] and self.buffer != {}: |
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45 | # One whole loop has been completed |
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46 | # Flush stats to file |
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47 | logger.debug(f"Exporting stats ({listkeys(self.buffer)}) to JSON file ({self.json_filename})") |
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48 | |||
49 | # Export stats to JSON file |
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50 | with open(self.json_filename, "w") as self.json_file: |
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51 | self.json_file.write(f"{json_dumps(self.buffer)}\n") |
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52 | |||
53 | # Reset buffer |
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54 | self.buffer = {} |
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55 | |||
56 | # Add current stat to the buffer |
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57 | self.buffer[name] = dict(zip(columns, points)) |
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58 |