115 lines
4.5 KiB
Python
115 lines
4.5 KiB
Python
"""
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MIT License
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Copyright (c) 2020 Airbyte
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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"""
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import copy
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from datetime import datetime
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from typing import Any, Iterator, Mapping, MutableMapping, Type
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from airbyte_protocol import (
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AirbyteCatalog,
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AirbyteConnectionStatus,
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AirbyteMessage,
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AirbyteRecordMessage,
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AirbyteStateMessage,
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ConfiguredAirbyteCatalog,
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ConfiguredAirbyteStream,
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Status,
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SyncMode,
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)
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from airbyte_protocol import Type as MessageType
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from .client import BaseClient
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from .integration import Source
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from .logger import AirbyteLogger
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class BaseSource(Source):
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"""Base source that designed to work with clients derived from BaseClient"""
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client_class: Type[BaseClient] = None
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@property
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def name(self) -> str:
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"""Source name"""
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return self.__class__.__name__
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def _get_client(self, config: Mapping):
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"""Construct client"""
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client = self.client_class(**config)
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return client
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def discover(self, logger: AirbyteLogger, config: Mapping[str, Any]) -> AirbyteCatalog:
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"""Discover streams"""
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client = self._get_client(config)
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return AirbyteCatalog(streams=[stream for stream in client.streams])
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def check(self, logger: AirbyteLogger, config: Mapping[str, Any]) -> AirbyteConnectionStatus:
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"""Check connection"""
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client = self._get_client(config)
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alive, error = client.health_check()
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if not alive:
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return AirbyteConnectionStatus(status=Status.FAILED, message=str(error))
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return AirbyteConnectionStatus(status=Status.SUCCEEDED)
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def read(
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self, logger: AirbyteLogger, config: Mapping[str, Any], catalog: ConfiguredAirbyteCatalog, state: MutableMapping[str, Any] = None
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) -> Iterator[AirbyteMessage]:
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state = state or {}
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client = self._get_client(config)
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logger.info(f"Starting syncing {self.name}")
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total_state = copy.deepcopy(state)
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for configured_stream in catalog.streams:
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try:
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yield from self._read_stream(logger=logger, client=client, configured_stream=configured_stream, state=total_state)
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# TODO: test stream fail
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except Exception:
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logger.exception(f"Encountered an exception while reading stream {self.name}")
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logger.info(f"Finished syncing {self.name}")
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def _read_stream(
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self, logger: AirbyteLogger, client: BaseClient, configured_stream: ConfiguredAirbyteStream, state: MutableMapping[str, Any]
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):
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stream_name = configured_stream.stream.name
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use_incremental = configured_stream.sync_mode == SyncMode.incremental and client.stream_has_state(stream_name)
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if use_incremental and state.get(stream_name):
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logger.info(f"Set state of {stream_name} stream to {state.get(stream_name)}")
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client.set_stream_state(stream_name, state.get(stream_name))
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logger.info(f"Syncing {stream_name} stream")
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for record in client.read_stream(configured_stream.stream):
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now = int(datetime.now().timestamp()) * 1000
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message = AirbyteRecordMessage(stream=stream_name, data=record, emitted_at=now)
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yield AirbyteMessage(type=MessageType.RECORD, record=message)
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if use_incremental and client.get_stream_state(stream_name):
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state[stream_name] = client.get_stream_state(stream_name)
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# output state object only together with other stream states
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yield AirbyteMessage(type=MessageType.STATE, state=AirbyteStateMessage(data=state))
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