blob: 1ae08cbec6566284449cc64d0eba3b532ce2bdfd (
about) (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
# SPDX-License-Identifier: GPL-3.0-or-later
# Haketilo proxy data and configuration (definition of fields of a class that
# will implement HaketiloState).
#
# This file is part of Hydrilla&Haketilo.
#
# Copyright (C) 2022 Wojtek Kosior
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
#
#
# I, Wojtek Kosior, thereby promise not to sue for violation of this
# file's license. Although I request that you do not make use this code
# in a proprietary program, I am not going to enforce this in court.
"""
This module defines fields that will later be part of a concrete HaketiloState
subtype.
"""
# Enable using with Python 3.7.
from __future__ import annotations
import sqlite3
import threading
import dataclasses as dc
import typing as t
from pathlib import Path
from contextlib import contextmanager
import sqlite3
from immutables import Map
from ... import pattern_tree
from .. import state
from .. import policies
PolicyTree = pattern_tree.PatternTree[policies.PolicyFactory]
PayloadsData = t.Mapping[state.PayloadRef, state.PayloadData]
# mypy needs to be corrected:
# https://stackoverflow.com/questions/70999513/conflict-between-mix-ins-for-abstract-dataclasses/70999704#70999704
@dc.dataclass # type: ignore[misc]
class HaketiloStateWithFields(state.HaketiloState):
"""...."""
store_dir: Path
connection: sqlite3.Connection
current_cursor: t.Optional[sqlite3.Cursor] = None
#settings: state.HaketiloGlobalSettings
policy_tree: PolicyTree = PolicyTree()
payloads_data: PayloadsData = dc.field(default_factory=dict)
lock: threading.RLock = dc.field(default_factory=threading.RLock)
@contextmanager
def cursor(self, transaction: bool = False) \
-> t.Iterator[sqlite3.Cursor]:
"""...."""
start_transaction = transaction and not self.connection.in_transaction
with self.lock:
if self.current_cursor is not None:
yield self.current_cursor
return
try:
self.current_cursor = self.connection.cursor()
if start_transaction:
self.current_cursor.execute('BEGIN TRANSACTION;')
try:
yield self.current_cursor
if start_transaction:
assert self.connection.in_transaction
self.current_cursor.execute('COMMIT TRANSACTION;')
except:
if start_transaction:
self.current_cursor.execute('ROLLBACK TRANSACTION;')
raise
finally:
self.current_cursor = None
def recompute_payloads(self, cursor: sqlite3.Cursor) -> None:
"""...."""
...
|
