1 | """JSON interface class.""" |
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2 | |||
3 | import sys |
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4 | |||
5 | from glances.globals import json_dumps |
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6 | from glances.compat import PY3, listkeys |
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7 | from glances.logger import logger |
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8 | from glances.exports.glances_export import GlancesExport |
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9 | |||
10 | |||
11 | class Export(GlancesExport): |
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12 | |||
13 | """This class manages the JSON export module.""" |
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14 | |||
15 | def __init__(self, config=None, args=None): |
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16 | """Init the JSON export IF.""" |
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17 | super(Export, self).__init__(config=config, args=args) |
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18 | |||
19 | # JSON file name |
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20 | self.json_filename = args.export_json_file |
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21 | |||
22 | # Set the JSON output file |
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23 | try: |
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24 | if PY3: |
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25 | self.json_file = open(self.json_filename, 'w') |
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26 | self.json_file.close() |
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27 | else: |
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28 | self.json_file = open(self.json_filename, 'wb') |
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29 | self.json_file.close() |
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30 | except IOError as e: |
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31 | logger.critical("Cannot create the JSON file: {}".format(e)) |
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32 | sys.exit(2) |
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33 | |||
34 | logger.info("Exporting stats to file: {}".format(self.json_filename)) |
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35 | |||
36 | self.export_enable = True |
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37 | |||
38 | # Buffer for dict of stats |
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39 | self.buffer = {} |
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40 | |||
41 | def exit(self): |
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42 | """Close the JSON file.""" |
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43 | logger.debug("Finalise export interface %s" % self.export_name) |
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44 | self.json_file.close() |
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45 | |||
46 | def export(self, name, columns, points): |
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47 | """Export the stats to the JSON file.""" |
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48 | |||
49 | # Check for completion of loop for all exports |
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50 | if name == self.last_exported_list()[0] and self.buffer != {}: |
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51 | # One whole loop has been completed |
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52 | # Flush stats to file |
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53 | logger.debug("Exporting stats ({}) to JSON file ({})".format(listkeys(self.buffer), self.json_filename)) |
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54 | |||
55 | # Export stats to JSON file |
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56 | if PY3: |
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57 | with open(self.json_filename, "w") as self.json_file: |
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58 | self.json_file.write("{}\n".format(json_dumps(self.buffer))) |
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59 | else: |
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60 | with open(self.json_filename, "wb") as self.json_file: |
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61 | self.json_file.write("{}\n".format(json_dumps(self.buffer))) |
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62 | |||
63 | # Reset buffer |
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64 | self.buffer = {} |
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65 | |||
66 | # Add current stat to the buffer |
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67 | self.buffer[name] = dict(zip(columns, points)) |
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68 |