Differential D3257 Diff 11565 swh/scheduler/interface.py

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swh/scheduler/interface.py

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				# Copyright (C) 2015-2020 The Software Heritage developers
				# See the AUTHORS file at the top-level directory of this distribution
				# License: GNU General Public License version 3, or any later version
				# See top-level LICENSE file for more information

				from typing import Any, Dict, Optional

				from swh.core.api import remote_api_endpoint


				class SchedulerInterface:
				@remote_api_endpoint("task_type/create")
				def create_task_type(self, task_type):
				"""Create a new task type ready for scheduling.

				Args:
				task_type (dict): a dictionary with the following keys:

				- type (str): an identifier for the task type
				- description (str): a human-readable description of what the
				task does
				- backend_name (str): the name of the task in the
				job-scheduling backend
				- default_interval (datetime.timedelta): the default interval
				between two task runs
				- min_interval (datetime.timedelta): the minimum interval
				between two task runs
				- max_interval (datetime.timedelta): the maximum interval
				between two task runs
				- backoff_factor (float): the factor by which the interval
				changes at each run
				- max_queue_length (int): the maximum length of the task queue
				for this task type

				"""
				...

				@remote_api_endpoint("task_type/get")
				def get_task_type(self, task_type_name):
				"""Retrieve the task type with id task_type_name"""
				...

				@remote_api_endpoint("task_type/get_all")
				def get_task_types(self):
				"""Retrieve all registered task types"""
				...

				@remote_api_endpoint("task/create")
				def create_tasks(self, tasks, policy="recurring"):
				"""Create new tasks.

				Args:
				tasks (list): each task is a dictionary with the following keys:

				- type (str): the task type
				- arguments (dict): the arguments for the task runner, keys:

				- args (list of str): arguments
				- kwargs (dict str -> str): keyword arguments

				- next_run (datetime.datetime): the next scheduled run for the
				task

				Returns:
				a list of created tasks.

				"""
				...

				@remote_api_endpoint("task/set_status")
				def set_status_tasks(self, task_ids, status="disabled", next_run=None):
				"""Set the tasks' status whose ids are listed.

				If given, also set the next_run date.
				"""
				...

				@remote_api_endpoint("task/disable")
				def disable_tasks(self, task_ids):
				"""Disable the tasks whose ids are listed."""
				...

				@remote_api_endpoint("task/search")
				def search_tasks(
				self,
				task_id=None,
				task_type=None,
				status=None,
				priority=None,
				policy=None,
				before=None,
				after=None,
				limit=None,
				):
				"""Search tasks from selected criterions"""
				...

				@remote_api_endpoint("task/get")
				def get_tasks(self, task_ids):
				"""Retrieve the info of tasks whose ids are listed."""
				...

				@remote_api_endpoint("task/peek_ready")
				def peek_ready_tasks(
				self, task_type, timestamp=None, num_tasks=None, num_tasks_priority=None,
				):
				"""Fetch the list of ready tasks

				Args:
				task_type (str): filtering task per their type
				timestamp (datetime.datetime): peek tasks that need to be executed
				before that timestamp
				num_tasks (int): only peek at num_tasks tasks (with no priority)
				num_tasks_priority (int): only peek at num_tasks_priority
				tasks (with priority)

				Returns:
				a list of tasks

				"""
				...

				@remote_api_endpoint("task/grab_ready")
				def grab_ready_tasks(
				self, task_type, timestamp=None, num_tasks=None, num_tasks_priority=None,
				):
				"""Fetch the list of ready tasks, and mark them as scheduled

				Args:
				task_type (str): filtering task per their type
				timestamp (datetime.datetime): grab tasks that need to be executed
				before that timestamp
				num_tasks (int): only grab num_tasks tasks (with no priority)
				num_tasks_priority (int): only grab oneshot num_tasks tasks (with
				priorities)

				Returns:
				a list of tasks

				"""
				...

				@remote_api_endpoint("task_run/schedule_one")
				def schedule_task_run(self, task_id, backend_id, metadata=None, timestamp=None):
				"""Mark a given task as scheduled, adding a task_run entry in the database.

				Args:
				task_id (int): the identifier for the task being scheduled
				backend_id (str): the identifier of the job in the backend
				metadata (dict): metadata to add to the task_run entry
				timestamp (datetime.datetime): the instant the event occurred

				Returns:
				a fresh task_run entry

				"""
				...

				@remote_api_endpoint("task_run/schedule")
				def mass_schedule_task_runs(self, task_runs):
				"""Schedule a bunch of task runs.

				Args:
				task_runs (list): a list of dicts with keys:

				- task (int): the identifier for the task being scheduled
				- backend_id (str): the identifier of the job in the backend
				- metadata (dict): metadata to add to the task_run entry
				- scheduled (datetime.datetime): the instant the event occurred

				Returns:
				None
				"""
				...

				@remote_api_endpoint("task_run/start")
				def start_task_run(self, backend_id, metadata=None, timestamp=None):
				"""Mark a given task as started, updating the corresponding task_run
				entry in the database.

				Args:
				backend_id (str): the identifier of the job in the backend
				metadata (dict): metadata to add to the task_run entry
				timestamp (datetime.datetime): the instant the event occurred

				Returns:
				the updated task_run entry

				"""
				...

				@remote_api_endpoint("task_run/end")
				def end_task_run(
				self, backend_id, status, metadata=None, timestamp=None, result=None,
				):
				"""Mark a given task as ended, updating the corresponding task_run entry in the
				database.

				Args:
				backend_id (str): the identifier of the job in the backend
				status (str): how the task ended; one of: 'eventful', 'uneventful',
				'failed'
				metadata (dict): metadata to add to the task_run entry
				timestamp (datetime.datetime): the instant the event occurred

				Returns:
				the updated task_run entry

				"""
				...

				@remote_api_endpoint("task/filter_for_archive")
				def filter_task_to_archive(
				self,
				after_ts: str,
				before_ts: str,
				limit: int = 10,
				page_token: Optional[str] = None,
				) -> Dict[str, Any]:
				"""Compute the tasks to archive within the datetime interval
				[after_ts, before_ts[. The method returns a paginated result.

				Returns:
				dict with the following keys:
				- next_page_token: opaque token to be used as
				`page_token` to retrieve the next page of result. If absent,
				there is no more pages to gather.
				- tasks: list of task dictionaries with the following keys:

				id (str): origin task id
				started (Optional[datetime]): started date
				scheduled (datetime): scheduled date
				arguments (json dict): task's arguments
				...

				"""
				...

				@remote_api_endpoint("task/delete_archived")
				def delete_archived_tasks(self, task_ids):
				"""Delete archived tasks as much as possible. Only the task_ids whose
				complete associated task_run have been cleaned up will be.

				"""
				...

				@remote_api_endpoint("task_run/get")
				def get_task_runs(self, task_ids, limit=None):
				"""Search task run for a task id"""
				...

				@remote_api_endpoint("priority_ratios/get")
				def get_priority_ratios(self):
				...