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# Copyright 2023 The Matrix.org Foundation C.I.C.
#
# 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
#
# http://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 typing import TYPE_CHECKING, Any, List, Optional, Tuple, cast
from synapse.storage._base import SQLBaseStore, db_to_json
from synapse.storage.database import (
DatabasePool,
LoggingDatabaseConnection,
LoggingTransaction,
make_in_list_sql_clause,
)
from synapse.types import JsonDict, JsonMapping, ScheduledTask, TaskStatus
from synapse.util import json_encoder
if TYPE_CHECKING:
from synapse.server import HomeServer
ScheduledTaskRow = Tuple[str, str, str, int, str, str, str, str]
class TaskSchedulerWorkerStore(SQLBaseStore):
def __init__(
self,
database: DatabasePool,
db_conn: LoggingDatabaseConnection,
hs: "HomeServer",
):
super().__init__(database, db_conn, hs)
@staticmethod
def _convert_row_to_task(row: ScheduledTaskRow) -> ScheduledTask:
task_id, action, status, timestamp, resource_id, params, result, error = row
return ScheduledTask(
id=task_id,
action=action,
status=TaskStatus(status),
timestamp=timestamp,
resource_id=resource_id,
params=db_to_json(params) if params is not None else None,
result=db_to_json(result) if result is not None else None,
error=error,
)
async def get_scheduled_tasks(
self,
*,
actions: Optional[List[str]] = None,
resource_id: Optional[str] = None,
statuses: Optional[List[TaskStatus]] = None,
max_timestamp: Optional[int] = None,
limit: Optional[int] = None,
) -> List[ScheduledTask]:
"""Get a list of scheduled tasks from the DB.
Args:
actions: Limit the returned tasks to those specific action names
resource_id: Limit the returned tasks to the specific resource id, if specified
statuses: Limit the returned tasks to the specific statuses
max_timestamp: Limit the returned tasks to the ones that have
a timestamp inferior to the specified one
limit: Only return `limit` number of rows if set.
Returns: a list of `ScheduledTask`, ordered by increasing timestamps
"""
def get_scheduled_tasks_txn(txn: LoggingTransaction) -> List[ScheduledTaskRow]:
clauses: List[str] = []
args: List[Any] = []
if resource_id:
clauses.append("resource_id = ?")
args.append(resource_id)
if actions is not None:
clause, temp_args = make_in_list_sql_clause(
txn.database_engine, "action", actions
)
clauses.append(clause)
args.extend(temp_args)
if statuses is not None:
clause, temp_args = make_in_list_sql_clause(
txn.database_engine, "status", statuses
)
clauses.append(clause)
args.extend(temp_args)
if max_timestamp is not None:
clauses.append("timestamp <= ?")
args.append(max_timestamp)
sql = "SELECT * FROM scheduled_tasks"
if clauses:
sql = sql + " WHERE " + " AND ".join(clauses)
sql = sql + " ORDER BY timestamp"
if limit is not None:
sql += " LIMIT ?"
args.append(limit)
txn.execute(sql, args)
return cast(List[ScheduledTaskRow], txn.fetchall())
rows = await self.db_pool.runInteraction(
"get_scheduled_tasks", get_scheduled_tasks_txn
)
return [TaskSchedulerWorkerStore._convert_row_to_task(row) for row in rows]
async def insert_scheduled_task(self, task: ScheduledTask) -> None:
"""Insert a specified `ScheduledTask` in the DB.
Args:
task: the `ScheduledTask` to insert
"""
await self.db_pool.simple_insert(
"scheduled_tasks",
{
"id": task.id,
"action": task.action,
"status": task.status,
"timestamp": task.timestamp,
"resource_id": task.resource_id,
"params": None
if task.params is None
else json_encoder.encode(task.params),
"result": None
if task.result is None
else json_encoder.encode(task.result),
"error": task.error,
},
desc="insert_scheduled_task",
)
async def update_scheduled_task(
self,
id: str,
timestamp: int,
*,
status: Optional[TaskStatus] = None,
result: Optional[JsonMapping] = None,
error: Optional[str] = None,
) -> bool:
"""Update a scheduled task in the DB with some new value(s).
Args:
id: id of the `ScheduledTask` to update
timestamp: new timestamp of the task
status: new status of the task
result: new result of the task
error: new error of the task
Returns: `False` if no matching row was found, `True` otherwise
"""
updatevalues: JsonDict = {"timestamp": timestamp}
if status is not None:
updatevalues["status"] = status
if result is not None:
updatevalues["result"] = json_encoder.encode(result)
if error is not None:
updatevalues["error"] = error
nb_rows = await self.db_pool.simple_update(
"scheduled_tasks",
{"id": id},
updatevalues,
desc="update_scheduled_task",
)
return nb_rows > 0
async def get_scheduled_task(self, id: str) -> Optional[ScheduledTask]:
"""Get a specific `ScheduledTask` from its id.
Args:
id: the id of the task to retrieve
Returns: the task if available, `None` otherwise
"""
row = await self.db_pool.simple_select_one(
table="scheduled_tasks",
keyvalues={"id": id},
retcols=(
"id",
"action",
"status",
"timestamp",
"resource_id",
"params",
"result",
"error",
),
allow_none=True,
desc="get_scheduled_task",
)
return (
TaskSchedulerWorkerStore._convert_row_to_task(
(
row["id"],
row["action"],
row["status"],
row["timestamp"],
row["resource_id"],
row["params"],
row["result"],
row["error"],
)
)
if row
else None
)
async def delete_scheduled_task(self, id: str) -> None:
"""Delete a specific task from its id.
Args:
id: the id of the task to delete
"""
await self.db_pool.simple_delete(
"scheduled_tasks",
keyvalues={"id": id},
desc="delete_scheduled_task",
)
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