88 lines
2.8 KiB
Python
88 lines
2.8 KiB
Python
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
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# All Rights Reserved. See LICENSE file for details.
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from os.path import join as joinpath
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from os.path import basename
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from os import makedirs
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from datetime import datetime
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from dateutil import parser as dateparser
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from tfw.event_handler_base import EventHandlerBase
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from tfw.components.snapshot_provider import SnapshotProvider
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from tfw.config import TFWENV
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from tfw.config.logs import logging
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LOG = logging.getLogger(__name__)
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class DirectorySnapshottingEventHandler(EventHandlerBase):
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def __init__(self, key, directories, exclude_unix_patterns=None):
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super().__init__(key)
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self.snapshot_providers = {}
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self._exclude_unix_patterns = exclude_unix_patterns
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self.init_snapshot_providers(directories)
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self.command_handlers = {
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'take_snapshot': self.handle_take_snapshot,
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'restore_snapshot': self.handle_restore_snapshot,
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'exclude': self.handle_exclude
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}
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def init_snapshot_providers(self, directories):
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for index, directory in enumerate(directories):
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git_dir = self.init_git_dir(index, directory)
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self.snapshot_providers[directory] = SnapshotProvider(
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directory,
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git_dir,
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self._exclude_unix_patterns
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)
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@staticmethod
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def init_git_dir(index, directory):
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git_dir = joinpath(
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TFWENV.SNAPSHOTS_DIR,
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f'{basename(directory)}-{index}'
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)
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makedirs(git_dir, exist_ok=True)
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return git_dir
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def handle_event(self, message):
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try:
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data = message['data']
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message['data'] = self.command_handlers[data['command']](data)
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return message
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except KeyError:
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LOG.error('IGNORING MESSAGE: Invalid message received: %s', message)
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def handle_take_snapshot(self, data):
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LOG.debug('Taking snapshots of directories %s', self.snapshot_providers.keys())
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for provider in self.snapshot_providers.values():
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provider.take_snapshot()
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return data
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def handle_restore_snapshot(self, data):
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date = dateparser.parse(
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data.get(
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'value',
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datetime.now().isoformat()
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)
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)
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LOG.debug(
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'Restoring snapshots (@ %s) of directories %s',
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date,
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self.snapshot_providers.keys()
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)
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for provider in self.snapshot_providers.values():
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provider.restore_snapshot(date)
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return data
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def handle_exclude(self, data):
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exclude_unix_patterns = data['value']
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if not isinstance(exclude_unix_patterns, list):
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raise KeyError
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for provider in self.snapshot_providers.values():
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provider.exclude = exclude_unix_patterns
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return data
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