1 | """JSON interface class.""" |
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2 | |||
3 | import sys |
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4 | import json |
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5 | |||
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 | else: |
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27 | self.json_file = open(self.json_filename, 'wb') |
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28 | except IOError as e: |
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29 | logger.critical("Cannot create the JSON file: {}".format(e)) |
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30 | sys.exit(2) |
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31 | |||
32 | logger.info("Exporting stats to file: {}".format(self.json_filename)) |
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33 | |||
34 | self.export_enable = True |
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35 | |||
36 | # Buffer for dict of stats |
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37 | self.buffer = {} |
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38 | |||
39 | def exit(self): |
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40 | """Close the JSON file.""" |
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41 | logger.debug("Finalise export interface %s" % self.export_name) |
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42 | self.json_file.close() |
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43 | |||
44 | def export(self, name, columns, points): |
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45 | """Export the stats to the JSON file.""" |
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46 | |||
47 | # Check for completion of loop for all exports |
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48 | if name == self.plugins_to_export()[0] and self.buffer != {}: |
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49 | # One whole loop has been completed |
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50 | # Flush stats to file |
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51 | logger.debug("Exporting stats ({}) to JSON file ({})".format( |
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52 | listkeys(self.buffer), |
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53 | self.json_filename) |
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54 | ) |
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55 | |||
56 | # Export stats to JSON file |
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57 | data_json = json.dumps(self.buffer) |
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58 | self.json_file.write("{}\n".format(data_json)) |
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59 | |||
60 | # Reset buffer |
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61 | self.buffer = {} |
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62 | |||
63 | # Add current stat to the buffer |
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64 | self.buffer[name] = dict(zip(columns, points)) |
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65 |
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