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1# This file is part of daf_butler. 

2# 

3# Developed for the LSST Data Management System. 

4# This product includes software developed by the LSST Project 

5# (http://www.lsst.org). 

6# See the COPYRIGHT file at the top-level directory of this distribution 

7# for details of code ownership. 

8# 

9# This program is free software: you can redistribute it and/or modify 

10# it under the terms of the GNU General Public License as published by 

11# the Free Software Foundation, either version 3 of the License, or 

12# (at your option) any later version. 

13# 

14# This program is distributed in the hope that it will be useful, 

15# but WITHOUT ANY WARRANTY; without even the implied warranty of 

16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

17# GNU General Public License for more details. 

18# 

19# You should have received a copy of the GNU General Public License 

20# along with this program. If not, see <http://www.gnu.org/licenses/>. 

21 

22__all__ = ("DummyRegistry", ) 

23 

24 

25from typing import Any, Iterable, Iterator, Optional, Type 

26 

27from lsst.daf.butler import ddl, DatasetRef, DimensionUniverse 

28from lsst.daf.butler.registry.interfaces import ( 

29 Database, 

30 DatasetRecordStorageManager, 

31 DatastoreRegistryBridge, 

32 DatastoreRegistryBridgeManager, 

33 OpaqueTableStorageManager, 

34 OpaqueTableStorage, 

35 StaticTablesContext, 

36) 

37from lsst.daf.butler.registry.bridge.ephemeral import EphemeralDatastoreRegistryBridge 

38 

39 

40class DummyOpaqueTableStorage(OpaqueTableStorage): 

41 

42 def __init__(self, name: str, spec: ddl.TableSpec): 

43 super().__init__(name=name) 

44 self._rows = [] 

45 self._spec = spec 

46 

47 def insert(self, *data: dict): 

48 # Docstring inherited from OpaqueTableStorage. 

49 uniqueConstraints = list(self._spec.unique) 

50 uniqueConstraints.append(tuple(field.name for field in self._spec.fields if field.primaryKey)) 

51 for d in data: 

52 for constraint in uniqueConstraints: 

53 matching = list(self.fetch(**{k: d[k] for k in constraint})) 

54 if len(matching) != 0: 

55 raise RuntimeError(f"Unique constraint {constraint} violation " 

56 "in external table {self.name}.") 

57 self._rows.append(d) 

58 

59 def fetch(self, **where: Any) -> Iterator[dict]: 

60 # Docstring inherited from OpaqueTableStorage. 

61 for d in self._rows: 

62 if all(d[k] == v for k, v in where.items()): 

63 yield d 

64 

65 def delete(self, **where: Any): 

66 # Docstring inherited from OpaqueTableStorage. 

67 kept = [] 

68 for d in self._rows: 

69 if not all(d[k] == v for k, v in where.items()): 

70 kept.append(d) 

71 self._rows = kept 

72 

73 

74class DummyOpaqueTableStorageManager(OpaqueTableStorageManager): 

75 

76 def __init__(self): 

77 self._storages = {} 

78 

79 @classmethod 

80 def initialize(cls, db: Database, context: StaticTablesContext) -> OpaqueTableStorageManager: 

81 # Docstring inherited from OpaqueTableStorageManager. 

82 # Not used, but needed to satisfy ABC requirement. 

83 return cls() 

84 

85 def get(self, name: str) -> Optional[OpaqueTableStorage]: 

86 # Docstring inherited from OpaqueTableStorageManager. 

87 return self._storage.get(name) 

88 

89 def register(self, name: str, spec: ddl.TableSpec) -> OpaqueTableStorage: 

90 # Docstring inherited from OpaqueTableStorageManager. 

91 return self._storages.setdefault(name, DummyOpaqueTableStorage(name, spec)) 

92 

93 

94class DummyDatastoreRegistryBridgeManager(DatastoreRegistryBridgeManager): 

95 

96 def __init__(self, opaque: OpaqueTableStorageManager, universe: DimensionUniverse): 

97 super().__init__(opaque=opaque, universe=universe) 

98 self._bridges = {} 

99 

100 @classmethod 

101 def initialize(cls, db: Database, context: StaticTablesContext, *, 

102 opaque: OpaqueTableStorageManager, 

103 datasets: Type[DatasetRecordStorageManager], 

104 universe: DimensionUniverse, 

105 ) -> DatastoreRegistryBridgeManager: 

106 # Docstring inherited from DatastoreRegistryBridgeManager 

107 # Not used, but needed to satisfy ABC requirement. 

108 return cls(opaque=opaque, universe=universe) 

109 

110 def refresh(self): 

111 # Docstring inherited from DatastoreRegistryBridgeManager 

112 pass 

113 

114 def register(self, name: str, *, ephemeral: bool = False) -> DatastoreRegistryBridge: 

115 # Docstring inherited from DatastoreRegistryBridgeManager 

116 return self._bridges.setdefault(name, EphemeralDatastoreRegistryBridge(name)) 

117 

118 def findDatastores(self, ref: DatasetRef) -> Iterable[str]: 

119 # Docstring inherited from DatastoreRegistryBridgeManager 

120 for name, bridge in self._bridges.items(): 

121 if ref in bridge: 

122 yield name 

123 

124 

125class DummyRegistry: 

126 """Dummy Registry, for Datastore test purposes. 

127 """ 

128 def __init__(self): 

129 self._opaque = DummyOpaqueTableStorageManager() 

130 self.dimensions = DimensionUniverse() 

131 self._datastoreBridges = DummyDatastoreRegistryBridgeManager(self._opaque, self.dimensions) 

132 

133 def getDatastoreBridgeManager(self): 

134 return self._datastoreBridges