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infra
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infra_object.py
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feast
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python
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feast
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infra
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infra_object.py
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# Copyright 2021 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.
from
abc
import
ABC
,
abstractmethod
from
dataclasses
import
dataclass
,
field
from
typing
import
Any
,
List
from
feast
.
errors
import
FeastInvalidInfraObjectType
from
feast
.
importer
import
import_class
from
feast
.
protos
.
feast
.
core
.
DatastoreTable_pb2
import
(
DatastoreTable
as
DatastoreTableProto
,
)
from
feast
.
protos
.
feast
.
core
.
DynamoDBTable_pb2
import
(
DynamoDBTable
as
DynamoDBTableProto
,
)
from
feast
.
protos
.
feast
.
core
.
InfraObject_pb2
import
Infra
as
InfraProto
from
feast
.
protos
.
feast
.
core
.
InfraObject_pb2
import
InfraObject
as
InfraObjectProto
from
feast
.
protos
.
feast
.
core
.
SqliteTable_pb2
import
SqliteTable
as
SqliteTableProto
DATASTORE_INFRA_OBJECT_CLASS_TYPE
=
"feast.infra.online_stores.datastore.DatastoreTable"
DYNAMODB_INFRA_OBJECT_CLASS_TYPE
=
"feast.infra.online_stores.dynamodb.DynamoDBTable"
SQLITE_INFRA_OBJECT_CLASS_TYPE
=
"feast.infra.online_stores.sqlite.SqliteTable"
class
InfraObject
(
ABC
):
"""
Represents a single infrastructure object (e.g. online store table) managed by Feast.
"""
@
abstractmethod
def
__init__
(
self
,
name
:
str
):
self
.
_name
=
name
@
property
def
name
(
self
)
->
str
:
return
self
.
_name
@
abstractmethod
def
to_infra_object_proto
(
self
)
->
InfraObjectProto
:
"""Converts an InfraObject to its protobuf representation, wrapped in an InfraObjectProto."""
pass
@
abstractmethod
def
to_proto
(
self
)
->
Any
:
"""Converts an InfraObject to its protobuf representation."""
pass
def
__lt__
(
self
,
other
)
->
bool
:
return
self
.
name
<
other
.
name
@
staticmethod
@
abstractmethod
def
from_infra_object_proto
(
infra_object_proto
:
InfraObjectProto
)
->
Any
:
"""
Returns an InfraObject created from a protobuf representation.
Args:
infra_object_proto: A protobuf representation of an InfraObject.
Raises:
FeastInvalidInfraObjectType: The type of InfraObject could not be identified.
"""
if
infra_object_proto
.
infra_object_class_type
:
cls
=
_get_infra_object_class_from_type
(
infra_object_proto
.
infra_object_class_type
)
return
cls
.
from_infra_object_proto
(
infra_object_proto
)
raise
FeastInvalidInfraObjectType
()
@
staticmethod
def
from_proto
(
infra_object_proto
:
Any
)
->
Any
:
"""
Converts a protobuf representation of a subclass to an object of that subclass.
Args:
infra_object_proto: A protobuf representation of an InfraObject.
Raises:
FeastInvalidInfraObjectType: The type of InfraObject could not be identified.
"""
if
isinstance
(
infra_object_proto
,
DatastoreTableProto
):
infra_object_class_type
=
DATASTORE_INFRA_OBJECT_CLASS_TYPE
elif
isinstance
(
infra_object_proto
,
DynamoDBTableProto
):
infra_object_class_type
=
DYNAMODB_INFRA_OBJECT_CLASS_TYPE
elif
isinstance
(
infra_object_proto
,
SqliteTableProto
):
infra_object_class_type
=
SQLITE_INFRA_OBJECT_CLASS_TYPE
else
:
raise
FeastInvalidInfraObjectType
()
cls
=
_get_infra_object_class_from_type
(
infra_object_class_type
)
return
cls
.
from_proto
(
infra_object_proto
)
@
abstractmethod
def
update
(
self
):
"""
Deploys or updates the infrastructure object.
"""
pass
@
abstractmethod
def
teardown
(
self
):
"""
Tears down the infrastructure object.
"""
pass
@
dataclass
class
Infra
:
"""
Represents the set of infrastructure managed by Feast.
Args:
infra_objects: A list of InfraObjects, each representing one infrastructure object.
"""
infra_objects
:
List
[
InfraObject
]
=
field
(
default_factory
=
list
)
def
to_proto
(
self
)
->
InfraProto
:
"""
Converts Infra to its protobuf representation.
Returns:
An InfraProto protobuf.
"""
infra_proto
=
InfraProto
()
for
infra_object
in
self
.
infra_objects
:
infra_object_proto
=
infra_object
.
to_infra_object_proto
()
infra_proto
.
infra_objects
.
append
(
infra_object_proto
)
return
infra_proto
@
classmethod
def
from_proto
(
cls
,
infra_proto
:
InfraProto
):
"""
Returns an Infra object created from a protobuf representation.
"""
infra
=
cls
()
infra
.
infra_objects
+=
[
InfraObject
.
from_infra_object_proto
(
infra_object_proto
)
for
infra_object_proto
in
infra_proto
.
infra_objects
]
return
infra
def
_get_infra_object_class_from_type
(
infra_object_class_type
:
str
):
module_name
,
infra_object_class_name
=
infra_object_class_type
.
rsplit
(
"."
,
1
)
return
import_class
(
module_name
,
infra_object_class_name
)
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