e23789bbd6
* checkout files from test branch * read_incremental works * reset to master * remove dead code * comment * fix * Add test * comments * utc * format * small fix * Add test with rfc3339 * remove unused param * fix test
89 lines
3.3 KiB
Python
89 lines
3.3 KiB
Python
#
|
|
# Copyright (c) 2022 Airbyte, Inc., all rights reserved.
|
|
#
|
|
|
|
|
|
from typing import Any, Iterable, List, Mapping, MutableMapping, Optional, Union
|
|
|
|
from airbyte_cdk.models import SyncMode
|
|
from airbyte_cdk.sources.declarative.retrievers.retriever import Retriever
|
|
from airbyte_cdk.sources.declarative.schema.schema_loader import SchemaLoader
|
|
from airbyte_cdk.sources.streams.core import Stream
|
|
|
|
|
|
class DeclarativeStream(Stream):
|
|
"""
|
|
DeclarativeStream is a Stream that delegates most of its logic to its schema_load and retriever
|
|
"""
|
|
|
|
def __init__(self, name, primary_key, schema_loader: SchemaLoader, retriever: Retriever, cursor_field: Optional[List[str]] = None):
|
|
self._name = name
|
|
self._primary_key = primary_key
|
|
self._cursor_field = cursor_field or []
|
|
self._schema_loader = schema_loader
|
|
self._retriever = retriever
|
|
|
|
@property
|
|
def primary_key(self) -> Optional[Union[str, List[str], List[List[str]]]]:
|
|
return self._primary_key
|
|
|
|
@property
|
|
def name(self) -> str:
|
|
"""
|
|
:return: Stream name. By default this is the implementing class name, but it can be overridden as needed.
|
|
"""
|
|
return self._name
|
|
|
|
@property
|
|
def state(self) -> MutableMapping[str, Any]:
|
|
return self._retriever.state
|
|
|
|
@state.setter
|
|
def state(self, value: MutableMapping[str, Any]):
|
|
"""State setter, accept state serialized by state getter."""
|
|
self._retriever.state = value
|
|
|
|
def get_updated_state(self, current_stream_state: MutableMapping[str, Any], latest_record: Mapping[str, Any]):
|
|
return self.state
|
|
|
|
@property
|
|
def cursor_field(self) -> Union[str, List[str]]:
|
|
"""
|
|
Override to return the default cursor field used by this stream e.g: an API entity might always use created_at as the cursor field.
|
|
:return: The name of the field used as a cursor. If the cursor is nested, return an array consisting of the path to the cursor.
|
|
"""
|
|
return self._cursor_field
|
|
|
|
def read_records(
|
|
self,
|
|
sync_mode: SyncMode,
|
|
cursor_field: List[str] = None,
|
|
stream_slice: Mapping[str, Any] = None,
|
|
stream_state: Mapping[str, Any] = None,
|
|
) -> Iterable[Mapping[str, Any]]:
|
|
return self._retriever.read_records(sync_mode, cursor_field, stream_slice, stream_state)
|
|
|
|
def get_json_schema(self) -> Mapping[str, Any]:
|
|
"""
|
|
:return: A dict of the JSON schema representing this stream.
|
|
|
|
The default implementation of this method looks for a JSONSchema file with the same name as this stream's "name" property.
|
|
Override as needed.
|
|
"""
|
|
# TODO show an example of using pydantic to define the JSON schema, or reading an OpenAPI spec
|
|
return self._schema_loader.get_json_schema()
|
|
|
|
def stream_slices(
|
|
self, *, sync_mode: SyncMode, cursor_field: List[str] = None, stream_state: Mapping[str, Any] = None
|
|
) -> Iterable[Optional[Mapping[str, Any]]]:
|
|
"""
|
|
Override to define the slices for this stream. See the stream slicing section of the docs for more information.
|
|
|
|
:param sync_mode:
|
|
:param cursor_field:
|
|
:param stream_state:
|
|
:return:
|
|
"""
|
|
# this is not passing the cursor field because it is known at init time
|
|
return self._retriever.stream_slices(sync_mode=sync_mode, stream_state=stream_state)
|