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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 VersionTuple 

37) 

38from lsst.daf.butler.registry.bridge.ephemeral import EphemeralDatastoreRegistryBridge 

39 

40 

41class DummyOpaqueTableStorage(OpaqueTableStorage): 

42 

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

44 super().__init__(name=name) 

45 self._rows = [] 

46 self._spec = spec 

47 

48 def insert(self, *data: dict): 

49 # Docstring inherited from OpaqueTableStorage. 

50 uniqueConstraints = list(self._spec.unique) 

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

52 for d in data: 

53 for constraint in uniqueConstraints: 

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

55 if len(matching) != 0: 

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

57 "in external table {self.name}.") 

58 self._rows.append(d) 

59 

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

61 # Docstring inherited from OpaqueTableStorage. 

62 for d in self._rows: 

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

64 yield d 

65 

66 def delete(self, columns: Iterable[str], *rows: dict): 

67 # Docstring inherited from OpaqueTableStorage. 

68 kept_rows = [] 

69 for table_row in self._rows: 

70 for where_row in rows: 

71 if all(table_row[k] == v for k, v in where_row.items()): 

72 break 

73 else: 

74 kept_rows.append(table_row) 

75 self._rows = kept_rows 

76 

77 

78class DummyOpaqueTableStorageManager(OpaqueTableStorageManager): 

79 

80 def __init__(self): 

81 self._storages = {} 

82 

83 @classmethod 

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

85 # Docstring inherited from OpaqueTableStorageManager. 

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

87 return cls() 

88 

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

90 # Docstring inherited from OpaqueTableStorageManager. 

91 return self._storage.get(name) 

92 

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

94 # Docstring inherited from OpaqueTableStorageManager. 

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

96 

97 @classmethod 

98 def currentVersion(cls) -> Optional[VersionTuple]: 

99 # Docstring inherited from VersionedExtension. 

100 return None 

101 

102 def schemaDigest(self) -> Optional[str]: 

103 # Docstring inherited from VersionedExtension. 

104 return None 

105 

106 

107class DummyDatastoreRegistryBridgeManager(DatastoreRegistryBridgeManager): 

108 

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

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

111 self._bridges = {} 

112 

113 @classmethod 

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

115 opaque: OpaqueTableStorageManager, 

116 datasets: Type[DatasetRecordStorageManager], 

117 universe: DimensionUniverse, 

118 ) -> DatastoreRegistryBridgeManager: 

119 # Docstring inherited from DatastoreRegistryBridgeManager 

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

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

122 

123 def refresh(self): 

124 # Docstring inherited from DatastoreRegistryBridgeManager 

125 pass 

126 

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

128 # Docstring inherited from DatastoreRegistryBridgeManager 

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

130 

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

132 # Docstring inherited from DatastoreRegistryBridgeManager 

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

134 if ref in bridge: 

135 yield name 

136 

137 @classmethod 

138 def currentVersion(cls) -> Optional[VersionTuple]: 

139 # Docstring inherited from VersionedExtension. 

140 return None 

141 

142 def schemaDigest(self) -> Optional[str]: 

143 # Docstring inherited from VersionedExtension. 

144 return None 

145 

146 

147class DummyRegistry: 

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

149 """ 

150 def __init__(self): 

151 self._opaque = DummyOpaqueTableStorageManager() 

152 self.dimensions = DimensionUniverse() 

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

154 

155 def getDatastoreBridgeManager(self): 

156 return self._datastoreBridges