feat(cdk): add async job components

airbyte-cdk/python/airbyte_cdk/sources/declarative/async_job/job.py

@@ -0,0 +1,45 @@
+# Copyright (c) 2024 Airbyte, Inc., all rights reserved.
+
+
+from datetime import timedelta
+from typing import Optional
+
+from airbyte_cdk import StreamSlice
+from airbyte_cdk.sources.declarative.async_job.timer import Timer
+
+from .status import AsyncJobStatus
+
+
+class AsyncJob:
+    """
+    Note that the timer will only stop once `update_status` is called so the job might be completed on the API side but until we query for
+    it and call `ApiJob.update_status`, `ApiJob.status` will not reflect the actual API side status.
+    """
+
+    def __init__(self, api_job_id: str, job_parameters: StreamSlice, timeout: Optional[timedelta] = None) -> None:
+        self._api_job_id = api_job_id
+        self._job_parameters = job_parameters
+        self._status = AsyncJobStatus.RUNNING
+
+        timeout = timeout if timeout else timedelta(minutes=60)
+        self._timer = Timer(timeout)
+        self._timer.start()
+
+    def api_job_id(self) -> str:
+        return self._api_job_id
+
+    def status(self) -> AsyncJobStatus:
+        if self._timer.has_timed_out():
+            return AsyncJobStatus.TIMED_OUT
+        return self._status
+
+    def job_parameters(self) -> StreamSlice:
+        return self._job_parameters
+
+    def update_status(self, status: AsyncJobStatus) -> None:
+        if self._status != AsyncJobStatus.RUNNING and status == AsyncJobStatus.RUNNING:
+            self._timer.start()
+        elif status in [AsyncJobStatus.FAILED, AsyncJobStatus.TIMED_OUT, AsyncJobStatus.COMPLETED]:
+            self._timer.stop()
+
+        self._status = status

airbyte-cdk/python/airbyte_cdk/sources/declarative/async_job/job_orchestrator.py

@@ -0,0 +1,239 @@
+# Copyright (c) 2024 Airbyte, Inc., all rights reserved.
+
+import logging
+import time
+from typing import Any, Generator, Iterable, List, Mapping, Optional, Set
+
+from airbyte_cdk import StreamSlice
+from airbyte_cdk.models import FailureType
+from airbyte_cdk.sources.declarative.async_job.job import AsyncJob
+from airbyte_cdk.sources.declarative.async_job.repository import AsyncJobRepository
+from airbyte_cdk.sources.declarative.async_job.status import AsyncJobStatus
+from airbyte_cdk.utils.traced_exception import AirbyteTracedException
+
+LOGGER = logging.getLogger("airbyte")
+
+
+class AsyncPartition:
+    """
+    This bucket of api_jobs is a bit useless for this iteration but should become interesting when we will be able to split jobs
+    """
+
+    _MAX_NUMBER_OF_ATTEMPTS = 3
+
+    def __init__(self, jobs: List[AsyncJob], stream_slice: StreamSlice) -> None:
+        self._attempts_per_job = {job: 0 for job in jobs}
+        self._stream_slice = stream_slice
+
+    def has_reached_max_attempt(self) -> bool:
+        return any(map(lambda attempt_count: attempt_count >= self._MAX_NUMBER_OF_ATTEMPTS, self._attempts_per_job.values()))
+
+    def replace_job(self, job_to_replace: AsyncJob, new_jobs: List[AsyncJob]) -> None:
+        current_attempt_count = self._attempts_per_job.pop(job_to_replace, None)
+        if current_attempt_count is None:
+            raise ValueError("Could not find job to replace")
+        elif current_attempt_count >= self._MAX_NUMBER_OF_ATTEMPTS:
+            raise ValueError(f"Max attempt reached for job in partition {self._stream_slice}")
+
+        new_attempt_count = current_attempt_count + 1
+        for job in new_jobs:
+            self._attempts_per_job[job] = new_attempt_count
+
+    def should_split(self, job: AsyncJob) -> bool:
+        """
+        Not used right now but once we support job split, we should split based on the number of attempts
+        """
+        return False
+
+    @property
+    def jobs(self) -> Iterable[AsyncJob]:
+        return self._attempts_per_job.keys()
+
+    @property
+    def stream_slice(self) -> StreamSlice:
+        return self._stream_slice
+
+    @property
+    def status(self) -> AsyncJobStatus:
+        """
+        Given different job statuses, the priority is: FAILED, TIMED_OUT, RUNNING. Else, it means everything is completed.
+        """
+        statuses = set(map(lambda job: job.status(), self.jobs))
+        if statuses == {AsyncJobStatus.COMPLETED}:
+            return AsyncJobStatus.COMPLETED
+        elif AsyncJobStatus.FAILED in statuses:
+            return AsyncJobStatus.FAILED
+        elif AsyncJobStatus.TIMED_OUT in statuses:
+            return AsyncJobStatus.TIMED_OUT
+        else:
+            return AsyncJobStatus.RUNNING
+
+    def __repr__(self) -> str:
+        return f"AsyncPartition(stream_slice={self._stream_slice}, attempt_per_job={self._attempts_per_job})"
+
+
+class AsyncJobOrchestrator:
+    _WAIT_TIME_BETWEEN_STATUS_UPDATE_IN_SECONDS = 5
+
+    def __init__(
+        self,
+        job_repository: AsyncJobRepository,
+        slices: Iterable[StreamSlice],
+        number_of_retries: Optional[int] = None,
+    ) -> None:
+        self._job_repository: AsyncJobRepository = job_repository
+        self._slice_iterator = iter(slices)
+        self._running_partitions: List[AsyncPartition] = []
+
+    def _replace_failed_jobs(self, partition: AsyncPartition) -> None:
+        failed_status_jobs = (AsyncJobStatus.FAILED, AsyncJobStatus.TIMED_OUT)
+        jobs_to_replace = [job for job in partition.jobs if job.status() in failed_status_jobs]
+        for job in jobs_to_replace:
+            new_job = self._job_repository.start(job.job_parameters())
+            partition.replace_job(job, [new_job])
+
+    def _start_jobs(self) -> None:
+        """
+        Start the jobs for each slice in the slice iterator.
+        This method iterates over the slice iterator and starts a job for each slice.
+        The started jobs are added to the running partitions.
+        Returns:
+            None
+
+        TODO Eventually, we need to cap the number of concurrent jobs.
+        However, the first iteration is for sendgrid which only has one job.
+        """
+        for partition in self._running_partitions:
+            self._replace_failed_jobs(partition)
+
+        for _slice in self._slice_iterator:
+            job = self._job_repository.start(_slice)
+            self._running_partitions.append(AsyncPartition([job], _slice))
+
+    def _get_running_jobs(self) -> Set[AsyncJob]:
+        """
+        Returns a set of running AsyncJob objects.
+
+        Returns:
+            Set[AsyncJob]: A set of AsyncJob objects that are currently running.
+        """
+        return {job for partition in self._running_partitions for job in partition.jobs if job.status() == AsyncJobStatus.RUNNING}
+
+    def _update_jobs_status(self) -> None:
+        """
+        Update the status of all running jobs in the repository.
+        """
+        running_jobs = self._get_running_jobs()
+        if running_jobs:
+            # update the status only if there are RUNNING jobs
+            self._job_repository.update_jobs_status(running_jobs)
+
+    def _wait_on_status_update(self) -> None:
+        """
+        Waits for a specified amount of time between status updates.
+
+
+        This method is used to introduce a delay between status updates in order to avoid excessive polling.
+        The duration of the delay is determined by the value of `_WAIT_TIME_BETWEEN_STATUS_UPDATE_IN_SECONDS`.
+
+        Returns:
+            None
+        """
+        self._debug_log(f"Polling status in progress. There are currently {len(self._running_partitions)} running partitions.")
+
+        # wait only when there are running partitions
+        if self._running_partitions:
+            self._debug_log(f"Waiting for {self._WAIT_TIME_BETWEEN_STATUS_UPDATE_IN_SECONDS} seconds before next poll...")
+            time.sleep(self._WAIT_TIME_BETWEEN_STATUS_UPDATE_IN_SECONDS)
+
+    def _debug_log(self, message: str) -> None:
+        # if statement in order to avoid string formatting if we're not in debug mode
+        if LOGGER.isEnabledFor(logging.DEBUG):
+            LOGGER.debug(message)
+
+    def _process_completed_partition(self, partition: AsyncPartition) -> None:
+        """
+        Process a completed partition.
+        Args:
+            partition (AsyncPartition): The completed partition to process.
+        Returns:
+            AsyncPartition: The processed partition.
+        """
+        job_ids = list(map(lambda job: job.api_job_id(), {job for job in partition.jobs}))
+        LOGGER.info(f"The following jobs for stream slice {partition.stream_slice} have been completed: {job_ids}.")
+
+    def _process_running_partitions_and_yield_completed_ones(self) -> Generator[AsyncPartition, Any, None]:
+        """
+        Process the running partitions.
+
+        Yields:
+            AsyncPartition: The processed partition.
+
+        Raises:
+            Any: Any exception raised during processing.
+        """
+        current_running_partitions: List[AsyncPartition] = []
+        for partition in self._running_partitions:
+            match partition.status:
+                case AsyncJobStatus.COMPLETED:
+                    self._process_completed_partition(partition)
+                    yield partition
+                case AsyncJobStatus.RUNNING:
+                    current_running_partitions.append(partition)
+                case _ if partition.has_reached_max_attempt():
+                    self._process_partitions_with_errors(partition)
+                case _:
+                    # job will be restarted in `_start_job`
+                    current_running_partitions.insert(0, partition)
+        # update the referenced list with running partitions
+        self._running_partitions = current_running_partitions
+
+    def _process_partitions_with_errors(self, partition: AsyncPartition) -> None:
+        """
+        Process a partition with status errors (FAILED and TIMEOUT).
+
+        Args:
+            partition (AsyncPartition): The partition to process.
+        Returns:
+            AirbyteTracedException: An exception indicating that at least one job could not be completed.
+        Raises:
+            AirbyteTracedException: If at least one job could not be completed.
+        """
+        status_by_job_id = {job.api_job_id(): job.status() for job in partition.jobs}
+        raise AirbyteTracedException(
+            message=f"At least one job could not be completed. Job statuses were: {status_by_job_id}",
+            failure_type=FailureType.system_error,
+        )
+
+    def create_and_get_completed_partitions(self) -> Iterable[AsyncPartition]:
+        """
+        Creates and retrieves completed partitions.
+        This method continuously starts jobs, updates job status, processes running partitions,
+        logs polling partitions, and waits for status updates. It yields completed partitions
+        as they become available.
+
+        Returns:
+            An iterable of completed partitions, represented as AsyncPartition objects.
+            Each partition is wrapped in an Optional, allowing for None values.
+        """
+        while True:
+            self._start_jobs()
+            if not self._running_partitions:
+                break
+
+            self._update_jobs_status()
+            yield from self._process_running_partitions_and_yield_completed_ones()
+            self._wait_on_status_update()
+
+    def fetch_records(self, partition: AsyncPartition) -> Iterable[Mapping[str, Any]]:
+        """
+        Fetches records from the given partition's jobs.
+
+        Args:
+            partition (AsyncPartition): The partition containing the jobs.
+
+        Yields:
+            Iterable[Mapping[str, Any]]: The fetched records from the jobs.
+        """
+        for job in partition.jobs:
+            yield from self._job_repository.fetch_records(job)

airbyte-cdk/python/airbyte_cdk/sources/declarative/async_job/repository.py

@@ -0,0 +1,23 @@
+# Copyright (c) 2024 Airbyte, Inc., all rights reserved.
+
+from abc import abstractmethod
+from dataclasses import dataclass
+from typing import Any, Iterable, Mapping, Set
+
+from airbyte_cdk import StreamSlice
+from airbyte_cdk.sources.declarative.async_job.job import AsyncJob
+
+
+@dataclass
+class AsyncJobRepository:
+    @abstractmethod
+    def start(self, stream_slice: StreamSlice) -> AsyncJob:
+        pass
+
+    @abstractmethod
+    def update_jobs_status(self, jobs: Set[AsyncJob]) -> None:
+        pass
+
+    @abstractmethod
+    def fetch_records(self, job: AsyncJob) -> Iterable[Mapping[str, Any]]:
+        pass

airbyte-cdk/python/airbyte_cdk/sources/declarative/async_job/status.py

@@ -0,0 +1,11 @@
+# Copyright (c) 2024 Airbyte, Inc., all rights reserved.
+
+
+from enum import Enum
+
+
+class AsyncJobStatus(Enum):
+    RUNNING = "RUNNING"
+    COMPLETED = "COMPLETED"
+    FAILED = "FAILED"
+    TIMED_OUT = "TIMED_OUT"

airbyte-cdk/python/airbyte_cdk/sources/declarative/async_job/timer.py

@@ -0,0 +1,39 @@
+# Copyright (c) 2024 Airbyte, Inc., all rights reserved.
+from datetime import datetime, timedelta, timezone
+from typing import Optional
+
+
+class Timer:
+    def __init__(self, timeout: timedelta) -> None:
+        self._start_datetime: Optional[datetime] = None
+        self._end_datetime: Optional[datetime] = None
+        self._timeout = timeout
+
+    def start(self) -> None:
+        self._start_datetime = self._now()
+        self._end_datetime = None
+
+    def stop(self) -> None:
+        if self._end_datetime is None:
+            self._end_datetime = self._now()
+
+    def is_started(self) -> bool:
+        return self._start_datetime is not None
+
+    @property
+    def elapsed_time(self) -> Optional[timedelta]:
+        if not self._start_datetime:
+            return None
+
+        end_time = self._end_datetime or self._now()
+        elapsed_period = end_time - self._start_datetime
+        return elapsed_period
+
+    def has_timed_out(self) -> bool:
+        if not self.is_started():
+            return False
+        return self.elapsed_time > self._timeout  # type: ignore  # given the job timer is started, we assume there is an elapsed_period
+
+    @staticmethod
+    def _now() -> datetime:
+        return datetime.now(tz=timezone.utc)