Repository navigation
Expand file tree
/
Copy pathentity.py
More file actions
213 lines (183 loc) · 7.64 KB
/
Copy pathentity.py
File metadata and controls
213 lines (183 loc) · 7.64 KB
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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
# Copyright 2019 The Feast Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import warnings
from datetime import datetime
from typing import Dict, List, Optional
from google.protobuf.json_format import MessageToJson
from typeguard import typechecked
from feast.protos.feast.core.Entity_pb2 import Entity as EntityProto
from feast.protos.feast.core.Entity_pb2 import EntityMeta as EntityMetaProto
from feast.protos.feast.core.Entity_pb2 import EntitySpecV2 as EntitySpecProto
from feast.value_type import ValueType
@typechecked
class Entity:
"""
An entity defines a collection of entities for which features can be defined. An
entity can also contain associated metadata.
Attributes:
name: The unique name of the entity.
value_type: The type of the entity, such as string or float.
join_key: A property that uniquely identifies different entities within the
collection. The join_key property is typically used for joining entities
with their associated features. If not specified, defaults to the name.
description: A human-readable description.
tags: A dictionary of key-value pairs to store arbitrary metadata.
owner: The owner of the entity, typically the email of the primary maintainer.
created_timestamp: The time when the entity was created.
last_updated_timestamp: The time when the entity was last updated.
"""
name: str
value_type: ValueType
join_key: str
description: str
tags: Dict[str, str]
owner: str
created_timestamp: Optional[datetime]
last_updated_timestamp: Optional[datetime]
def __init__(
self,
*,
name: str,
join_keys: Optional[List[str]] = None,
value_type: Optional[ValueType] = None,
description: str = "",
tags: Optional[Dict[str, str]] = None,
owner: str = "",
):
"""
Creates an Entity object.
Args:
name: The unique name of the entity.
join_keys (optional): A list of properties that uniquely identifies different entities
within the collection. This currently only supports a list of size one, but is
intended to eventually support multiple join keys.
value_type (optional): The type of the entity, such as string or float. If not specified,
it will be inferred from the schema of the underlying data source.
description (optional): A human-readable description.
tags (optional): A dictionary of key-value pairs to store arbitrary metadata.
owner (optional): The owner of the entity, typically the email of the primary maintainer.
Raises:
ValueError: Parameters are specified incorrectly.
"""
self.name = name
if value_type is None:
warnings.warn(
"Entity value_type will be mandatory in the next release. "
"Please specify a value_type for entity '%s'." % name,
DeprecationWarning,
stacklevel=2,
)
self.value_type = value_type or ValueType.UNKNOWN
if join_keys and len(join_keys) > 1:
# TODO(felixwang9817): When multiple join keys are supported, add a `join_keys` attribute
# and deprecate the `join_key` attribute.
raise ValueError(
"An entity may only have a single join key. "
"Multiple join keys will be supported in the future."
)
elif join_keys and len(join_keys) == 1:
self.join_key = join_keys[0]
else:
self.join_key = self.name
self.description = description
self.tags = tags if tags is not None else {}
self.owner = owner
self.created_timestamp = None
self.last_updated_timestamp = None
def __repr__(self):
return (
f"Entity(\n"
f" name={self.name!r},\n"
f" value_type={self.value_type!r},\n"
f" join_key={self.join_key!r},\n"
f" description={self.description!r},\n"
f" tags={self.tags!r},\n"
f" owner={self.owner!r},\n"
f" created_timestamp={self.created_timestamp!r},\n"
f" last_updated_timestamp={self.last_updated_timestamp!r}\n"
f")"
)
def __hash__(self) -> int:
return hash((self.name, self.join_key))
def __eq__(self, other):
if not isinstance(other, Entity):
raise TypeError("Comparisons should only involve Entity class objects.")
if (
self.name != other.name
or self.value_type != other.value_type
or self.join_key != other.join_key
or self.description != other.description
or self.tags != other.tags
or self.owner != other.owner
):
return False
return True
def __str__(self):
return str(MessageToJson(self.to_proto()))
def __lt__(self, other):
return self.name < other.name
def is_valid(self):
"""
Validates the state of this entity locally.
Raises:
ValueError: The entity does not have a name or does not have a type.
"""
if not self.name:
raise ValueError("The entity does not have a name.")
if not self.value_type:
raise ValueError(f"The entity {self.name} does not have a type.")
@classmethod
def from_proto(cls, entity_proto: EntityProto):
"""
Creates an entity from a protobuf representation of an entity.
Args:
entity_proto: A protobuf representation of an entity.
Returns:
An Entity object based on the entity protobuf.
"""
entity = cls(
name=entity_proto.spec.name,
join_keys=[entity_proto.spec.join_key],
value_type=ValueType(entity_proto.spec.value_type),
description=entity_proto.spec.description,
tags=dict(entity_proto.spec.tags),
owner=entity_proto.spec.owner,
)
if entity_proto.meta.HasField("created_timestamp"):
entity.created_timestamp = entity_proto.meta.created_timestamp.ToDatetime()
if entity_proto.meta.HasField("last_updated_timestamp"):
entity.last_updated_timestamp = (
entity_proto.meta.last_updated_timestamp.ToDatetime()
)
return entity
def to_proto(self) -> EntityProto:
"""
Converts an entity object to its protobuf representation.
Returns:
An EntityProto protobuf.
"""
meta = EntityMetaProto()
if self.created_timestamp:
meta.created_timestamp.FromDatetime(self.created_timestamp)
if self.last_updated_timestamp:
meta.last_updated_timestamp.FromDatetime(self.last_updated_timestamp)
spec = EntitySpecProto(
name=self.name,
value_type=self.value_type.value,
join_key=self.join_key,
description=self.description,
tags=self.tags,
owner=self.owner,
)
return EntityProto(spec=spec, meta=meta)