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orchestration.py
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orchestration.py
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import datetime
import warnings
from contextlib import AsyncExitStack
from typing import TYPE_CHECKING, Any, Dict, Iterable, List, Optional, Union
from uuid import UUID
import httpcore
import httpx
import pendulum
import pydantic
from asgi_lifespan import LifespanManager
from fastapi import FastAPI, status
import prefect
import prefect.exceptions
import prefect.server.schemas as schemas
import prefect.settings
import prefect.states
from prefect._internal.compatibility.deprecated import deprecated_callable
from prefect.client.schemas import FlowRun, OrchestrationResult, TaskRun
from prefect.deprecated.data_documents import DataDocument
from prefect.logging import get_logger
from prefect.server.schemas.actions import (
FlowRunNotificationPolicyCreate,
LogCreate,
WorkQueueCreate,
WorkQueueUpdate,
)
from prefect.server.schemas.core import (
BlockDocument,
BlockSchema,
BlockType,
FlowRunNotificationPolicy,
QueueFilter,
WorkPool,
WorkQueue,
)
from prefect.server.schemas.filters import (
FlowRunNotificationPolicyFilter,
LogFilter,
WorkPoolFilter,
WorkQueueFilter,
)
from prefect.server.schemas.responses import WorkerFlowRunResponse
from prefect.settings import (
PREFECT_API_DATABASE_CONNECTION_URL,
PREFECT_API_ENABLE_HTTP2,
PREFECT_API_KEY,
PREFECT_API_REQUEST_TIMEOUT,
PREFECT_API_TLS_INSECURE_SKIP_VERIFY,
PREFECT_API_URL,
PREFECT_CLOUD_API_URL,
)
from prefect.utilities.collections import AutoEnum
if TYPE_CHECKING:
from prefect.flows import Flow
from prefect.tasks import Task
from prefect.client.base import PrefectHttpxClient, app_lifespan_context
class ServerType(AutoEnum):
EPHEMERAL = AutoEnum.auto()
SERVER = AutoEnum.auto()
CLOUD = AutoEnum.auto()
def get_client(httpx_settings: dict = None) -> "PrefectClient":
"""
Retrieve a HTTP client for communicating with the Prefect REST API.
The client must be context managed; for example:
```python
async with get_client() as client:
await client.hello()
```
"""
ctx = prefect.context.get_settings_context()
api = PREFECT_API_URL.value()
if not api:
# create an ephemeral API if none was provided
from prefect.server.api.server import create_app
api = create_app(ctx.settings, ephemeral=True)
return PrefectClient(
api,
api_key=PREFECT_API_KEY.value(),
httpx_settings=httpx_settings,
)
class PrefectClient:
"""
An asynchronous client for interacting with the [Prefect REST API](/api-ref/rest-api/).
Args:
api: the REST API URL or FastAPI application to connect to
api_key: An optional API key for authentication.
api_version: The API version this client is compatible with.
httpx_settings: An optional dictionary of settings to pass to the underlying
`httpx.AsyncClient`
Examples:
Say hello to a Prefect REST API
<div class="terminal">
```
>>> async with get_client() as client:
>>> response = await client.hello()
>>>
>>> print(response.json())
👋
```
</div>
"""
def __init__(
self,
api: Union[str, FastAPI],
*,
api_key: str = None,
api_version: str = None,
httpx_settings: dict = None,
) -> None:
httpx_settings = httpx_settings.copy() if httpx_settings else {}
httpx_settings.setdefault("headers", {})
if PREFECT_API_TLS_INSECURE_SKIP_VERIFY:
httpx_settings.setdefault("verify", False)
if api_version is None:
# deferred import to avoid importing the entire server unless needed
from prefect.server.api.server import SERVER_API_VERSION
api_version = SERVER_API_VERSION
httpx_settings["headers"].setdefault("X-PREFECT-API-VERSION", api_version)
if api_key:
httpx_settings["headers"].setdefault("Authorization", f"Bearer {api_key}")
# Context management
self._exit_stack = AsyncExitStack()
self._ephemeral_app: Optional[FastAPI] = None
self.manage_lifespan = True
self.server_type: ServerType
# Only set if this client started the lifespan of the application
self._ephemeral_lifespan: Optional[LifespanManager] = None
self._closed = False
self._started = False
# Connect to an external application
if isinstance(api, str):
if httpx_settings.get("app"):
raise ValueError(
"Invalid httpx settings: `app` cannot be set when providing an "
"api url. `app` is only for use with ephemeral instances. Provide "
"it as the `api` parameter instead."
)
httpx_settings.setdefault("base_url", api)
# See https://www.python-httpx.org/advanced/#pool-limit-configuration
httpx_settings.setdefault(
"limits",
httpx.Limits(
# We see instability when allowing the client to open many connections at once.
# Limiting concurrency results in more stable performance.
max_connections=16,
max_keepalive_connections=8,
# The Prefect Cloud LB will keep connections alive for 30s.
# Only allow the client to keep connections alive for 25s.
keepalive_expiry=25,
),
)
# See https://www.python-httpx.org/http2/
# Enabling HTTP/2 support on the client does not necessarily mean that your requests
# and responses will be transported over HTTP/2, since both the client and the server
# need to support HTTP/2. If you connect to a server that only supports HTTP/1.1 the
# client will use a standard HTTP/1.1 connection instead.
httpx_settings.setdefault("http2", PREFECT_API_ENABLE_HTTP2.value())
self.server_type = (
ServerType.CLOUD
if api.startswith(PREFECT_CLOUD_API_URL.value())
else ServerType.SERVER
)
# Connect to an in-process application
elif isinstance(api, FastAPI):
self._ephemeral_app = api
self.server_type = ServerType.EPHEMERAL
httpx_settings.setdefault("app", self._ephemeral_app)
httpx_settings.setdefault("base_url", "http://ephemeral-prefect/api")
else:
raise TypeError(
f"Unexpected type {type(api).__name__!r} for argument `api`. Expected"
" 'str' or 'FastAPI'"
)
# See https://www.python-httpx.org/advanced/#timeout-configuration
httpx_settings.setdefault(
"timeout",
httpx.Timeout(
connect=PREFECT_API_REQUEST_TIMEOUT.value(),
read=PREFECT_API_REQUEST_TIMEOUT.value(),
write=PREFECT_API_REQUEST_TIMEOUT.value(),
pool=PREFECT_API_REQUEST_TIMEOUT.value(),
),
)
self._client = PrefectHttpxClient(
**httpx_settings,
)
# See https://www.python-httpx.org/advanced/#custom-transports
#
# If we're using an HTTP/S client (not the ephemeral client), adjust the
# transport to add retries _after_ it is instantiated. If we alter the transport
# before instantiation, the transport will not be aware of proxies unless we
# reproduce all of the logic to make it so.
#
# Only alter the transport to set our default of 3 retries, don't modify any
# transport a user may have provided via httpx_settings.
#
# Making liberal use of getattr and isinstance checks here to avoid any
# surprises if the internals of httpx or httpcore change on us
if isinstance(api, str) and not httpx_settings.get("transport"):
transport_for_url = getattr(self._client, "_transport_for_url", None)
if callable(transport_for_url):
server_transport = transport_for_url(httpx.URL(api))
if isinstance(server_transport, httpx.AsyncHTTPTransport):
pool = getattr(server_transport, "_pool", None)
if isinstance(pool, httpcore.AsyncConnectionPool):
pool._retries = 3
self.logger = get_logger("client")
@property
def api_url(self) -> httpx.URL:
"""
Get the base URL for the API.
"""
return self._client.base_url
# API methods ----------------------------------------------------------------------
async def api_healthcheck(self) -> Optional[Exception]:
"""
Attempts to connect to the API and returns the encountered exception if not
successful.
If successful, returns `None`.
"""
try:
await self._client.get("/health")
return None
except Exception as exc:
return exc
async def hello(self) -> httpx.Response:
"""
Send a GET request to /hello for testing purposes.
"""
return await self._client.get("/hello")
async def create_flow(self, flow: "Flow") -> UUID:
"""
Create a flow in the Prefect API.
Args:
flow: a [Flow][prefect.flows.Flow] object
Raises:
httpx.RequestError: if a flow was not created for any reason
Returns:
the ID of the flow in the backend
"""
return await self.create_flow_from_name(flow.name)
async def create_flow_from_name(self, flow_name: str) -> UUID:
"""
Create a flow in the Prefect API.
Args:
flow_name: the name of the new flow
Raises:
httpx.RequestError: if a flow was not created for any reason
Returns:
the ID of the flow in the backend
"""
flow_data = schemas.actions.FlowCreate(name=flow_name)
response = await self._client.post(
"/flows/", json=flow_data.dict(json_compatible=True)
)
flow_id = response.json().get("id")
if not flow_id:
raise httpx.RequestError(f"Malformed response: {response}")
# Return the id of the created flow
return UUID(flow_id)
async def read_flow(self, flow_id: UUID) -> schemas.core.Flow:
"""
Query the Prefect API for a flow by id.
Args:
flow_id: the flow ID of interest
Returns:
a [Flow model][prefect.server.schemas.core.Flow] representation of the flow
"""
response = await self._client.get(f"/flows/{flow_id}")
return schemas.core.Flow.parse_obj(response.json())
async def read_flows(
self,
*,
flow_filter: schemas.filters.FlowFilter = None,
flow_run_filter: schemas.filters.FlowRunFilter = None,
task_run_filter: schemas.filters.TaskRunFilter = None,
deployment_filter: schemas.filters.DeploymentFilter = None,
work_pool_filter: schemas.filters.WorkPoolFilter = None,
work_queue_filter: schemas.filters.WorkQueueFilter = None,
sort: schemas.sorting.FlowSort = None,
limit: int = None,
offset: int = 0,
) -> List[schemas.core.Flow]:
"""
Query the Prefect API for flows. Only flows matching all criteria will
be returned.
Args:
flow_filter: filter criteria for flows
flow_run_filter: filter criteria for flow runs
task_run_filter: filter criteria for task runs
deployment_filter: filter criteria for deployments
work_pool_filter: filter criteria for work pools
work_queue_filter: filter criteria for work pool queues
sort: sort criteria for the flows
limit: limit for the flow query
offset: offset for the flow query
Returns:
a list of Flow model representations of the flows
"""
body = {
"flows": flow_filter.dict(json_compatible=True) if flow_filter else None,
"flow_runs": (
flow_run_filter.dict(json_compatible=True) if flow_run_filter else None
),
"task_runs": (
task_run_filter.dict(json_compatible=True) if task_run_filter else None
),
"deployments": (
deployment_filter.dict(json_compatible=True)
if deployment_filter
else None
),
"work_pools": (
work_pool_filter.dict(json_compatible=True)
if work_pool_filter
else None
),
"work_queues": (
work_queue_filter.dict(json_compatible=True)
if work_queue_filter
else None
),
"sort": sort,
"limit": limit,
"offset": offset,
}
response = await self._client.post(f"/flows/filter", json=body)
return pydantic.parse_obj_as(List[schemas.core.Flow], response.json())
async def read_flow_by_name(
self,
flow_name: str,
) -> schemas.core.Flow:
"""
Query the Prefect API for a flow by name.
Args:
flow_name: the name of a flow
Returns:
a fully hydrated Flow model
"""
response = await self._client.get(f"/flows/name/{flow_name}")
return schemas.core.Flow.parse_obj(response.json())
async def create_flow_run_from_deployment(
self,
deployment_id: UUID,
*,
parameters: Dict[str, Any] = None,
context: dict = None,
state: prefect.states.State = None,
name: str = None,
tags: Iterable[str] = None,
idempotency_key: str = None,
parent_task_run_id: UUID = None,
) -> FlowRun:
"""
Create a flow run for a deployment.
Args:
deployment_id: The deployment ID to create the flow run from
parameters: Parameter overrides for this flow run. Merged with the
deployment defaults
context: Optional run context data
state: The initial state for the run. If not provided, defaults to
`Scheduled` for now. Should always be a `Scheduled` type.
name: An optional name for the flow run. If not provided, the server will
generate a name.
tags: An optional iterable of tags to apply to the flow run; these tags
are merged with the deployment's tags.
idempotency_key: Optional idempotency key for creation of the flow run.
If the key matches the key of an existing flow run, the existing run will
be returned instead of creating a new one.
parent_task_run_id: if a subflow run is being created, the placeholder task
run identifier in the parent flow
Raises:
httpx.RequestError: if the Prefect API does not successfully create a run for any reason
Returns:
The flow run model
"""
parameters = parameters or {}
context = context or {}
state = state or prefect.states.Scheduled()
tags = tags or []
flow_run_create = schemas.actions.DeploymentFlowRunCreate(
parameters=parameters,
context=context,
state=state.to_state_create(),
tags=tags,
name=name,
idempotency_key=idempotency_key,
parent_task_run_id=parent_task_run_id,
)
response = await self._client.post(
f"/deployments/{deployment_id}/create_flow_run",
json=flow_run_create.dict(json_compatible=True),
)
return FlowRun.parse_obj(response.json())
async def create_flow_run(
self,
flow: "Flow",
name: str = None,
parameters: Dict[str, Any] = None,
context: dict = None,
tags: Iterable[str] = None,
parent_task_run_id: UUID = None,
state: "prefect.states.State" = None,
) -> FlowRun:
"""
Create a flow run for a flow.
Args:
flow: The flow model to create the flow run for
name: An optional name for the flow run
parameters: Parameter overrides for this flow run.
context: Optional run context data
tags: a list of tags to apply to this flow run
parent_task_run_id: if a subflow run is being created, the placeholder task
run identifier in the parent flow
state: The initial state for the run. If not provided, defaults to
`Scheduled` for now. Should always be a `Scheduled` type.
Raises:
httpx.RequestError: if the Prefect API does not successfully create a run for any reason
Returns:
The flow run model
"""
parameters = parameters or {}
context = context or {}
if state is None:
state = prefect.states.Pending()
# Retrieve the flow id
flow_id = await self.create_flow(flow)
flow_run_create = schemas.actions.FlowRunCreate(
flow_id=flow_id,
flow_version=flow.version,
name=name,
parameters=parameters,
context=context,
tags=list(tags or []),
parent_task_run_id=parent_task_run_id,
state=state.to_state_create(),
empirical_policy=schemas.core.FlowRunPolicy(
retries=flow.retries,
retry_delay=flow.retry_delay_seconds,
),
)
flow_run_create_json = flow_run_create.dict(json_compatible=True)
response = await self._client.post("/flow_runs/", json=flow_run_create_json)
flow_run = FlowRun.parse_obj(response.json())
# Restore the parameters to the local objects to retain expectations about
# Python objects
flow_run.parameters = parameters
return flow_run
async def update_flow_run(
self,
flow_run_id: UUID,
flow_version: Optional[str] = None,
parameters: Optional[dict] = None,
name: Optional[str] = None,
tags: Optional[Iterable[str]] = None,
empirical_policy: Optional[schemas.core.FlowRunPolicy] = None,
infrastructure_pid: Optional[str] = None,
) -> httpx.Response:
"""
Update a flow run's details.
Args:
flow_run_id: The identifier for the flow run to update.
flow_version: A new version string for the flow run.
parameters: A dictionary of parameter values for the flow run. This will not
be merged with any existing parameters.
name: A new name for the flow run.
empirical_policy: A new flow run orchestration policy. This will not be
merged with any existing policy.
tags: An iterable of new tags for the flow run. These will not be merged with
any existing tags.
infrastructure_pid: The id of flow run as returned by an
infrastructure block.
Returns:
an `httpx.Response` object from the PATCH request
"""
params = {}
if flow_version is not None:
params["flow_version"] = flow_version
if parameters is not None:
params["parameters"] = parameters
if name is not None:
params["name"] = name
if tags is not None:
params["tags"] = tags
if empirical_policy is not None:
params["empirical_policy"] = empirical_policy
if infrastructure_pid:
params["infrastructure_pid"] = infrastructure_pid
flow_run_data = schemas.actions.FlowRunUpdate(**params)
return await self._client.patch(
f"/flow_runs/{flow_run_id}",
json=flow_run_data.dict(json_compatible=True, exclude_unset=True),
)
async def delete_flow_run(
self,
flow_run_id: UUID,
) -> None:
"""
Delete a flow run by UUID.
Args:
flow_run_id: The flow run UUID of interest.
Raises:
prefect.exceptions.ObjectNotFound: If request returns 404
httpx.RequestError: If requests fails
"""
try:
await self._client.delete(f"/flow_runs/{flow_run_id}"),
except httpx.HTTPStatusError as e:
if e.response.status_code == status.HTTP_404_NOT_FOUND:
raise prefect.exceptions.ObjectNotFound(http_exc=e) from e
else:
raise
async def create_concurrency_limit(
self,
tag: str,
concurrency_limit: int,
) -> UUID:
"""
Create a tag concurrency limit in the Prefect API. These limits govern concurrently
running tasks.
Args:
tag: a tag the concurrency limit is applied to
concurrency_limit: the maximum number of concurrent task runs for a given tag
Raises:
httpx.RequestError: if the concurrency limit was not created for any reason
Returns:
the ID of the concurrency limit in the backend
"""
concurrency_limit_create = schemas.actions.ConcurrencyLimitCreate(
tag=tag,
concurrency_limit=concurrency_limit,
)
response = await self._client.post(
"/concurrency_limits/",
json=concurrency_limit_create.dict(json_compatible=True),
)
concurrency_limit_id = response.json().get("id")
if not concurrency_limit_id:
raise httpx.RequestError(f"Malformed response: {response}")
return UUID(concurrency_limit_id)
async def read_concurrency_limit_by_tag(
self,
tag: str,
):
"""
Read the concurrency limit set on a specific tag.
Args:
tag: a tag the concurrency limit is applied to
Raises:
prefect.exceptions.ObjectNotFound: If request returns 404
httpx.RequestError: if the concurrency limit was not created for any reason
Returns:
the concurrency limit set on a specific tag
"""
try:
response = await self._client.get(
f"/concurrency_limits/tag/{tag}",
)
except httpx.HTTPStatusError as e:
if e.response.status_code == status.HTTP_404_NOT_FOUND:
raise prefect.exceptions.ObjectNotFound(http_exc=e) from e
else:
raise
concurrency_limit_id = response.json().get("id")
if not concurrency_limit_id:
raise httpx.RequestError(f"Malformed response: {response}")
concurrency_limit = schemas.core.ConcurrencyLimit.parse_obj(response.json())
return concurrency_limit
async def read_concurrency_limits(
self,
limit: int,
offset: int,
):
"""
Lists concurrency limits set on task run tags.
Args:
limit: the maximum number of concurrency limits returned
offset: the concurrency limit query offset
Returns:
a list of concurrency limits
"""
body = {
"limit": limit,
"offset": offset,
}
response = await self._client.post("/concurrency_limits/filter", json=body)
return pydantic.parse_obj_as(
List[schemas.core.ConcurrencyLimit], response.json()
)
async def reset_concurrency_limit_by_tag(
self,
tag: str,
slot_override: Optional[List[Union[UUID, str]]] = None,
):
"""
Resets the concurrency limit slots set on a specific tag.
Args:
tag: a tag the concurrency limit is applied to
slot_override: a list of task run IDs that are currently using a
concurrency slot, please check that any task run IDs included in
`slot_override` are currently running, otherwise those concurrency
slots will never be released.
Raises:
prefect.exceptions.ObjectNotFound: If request returns 404
httpx.RequestError: If request fails
"""
if slot_override is not None:
slot_override = [str(slot) for slot in slot_override]
try:
await self._client.post(
f"/concurrency_limits/tag/{tag}/reset",
json=dict(slot_override=slot_override),
)
except httpx.HTTPStatusError as e:
if e.response.status_code == status.HTTP_404_NOT_FOUND:
raise prefect.exceptions.ObjectNotFound(http_exc=e) from e
else:
raise
async def delete_concurrency_limit_by_tag(
self,
tag: str,
):
"""
Delete the concurrency limit set on a specific tag.
Args:
tag: a tag the concurrency limit is applied to
Raises:
prefect.exceptions.ObjectNotFound: If request returns 404
httpx.RequestError: If request fails
"""
try:
await self._client.delete(
f"/concurrency_limits/tag/{tag}",
)
except httpx.HTTPStatusError as e:
if e.response.status_code == status.HTTP_404_NOT_FOUND:
raise prefect.exceptions.ObjectNotFound(http_exc=e) from e
else:
raise
async def create_work_queue(
self,
name: str,
tags: Optional[List[str]] = None,
description: Optional[str] = None,
is_paused: Optional[bool] = None,
concurrency_limit: Optional[int] = None,
priority: Optional[int] = None,
work_pool_name: Optional[str] = None,
) -> schemas.core.WorkQueue:
"""
Create a work queue.
Args:
name: a unique name for the work queue
tags: DEPRECATED: an optional list of tags to filter on; only work scheduled with these tags
will be included in the queue. This option will be removed on 2023-02-23.
description: An optional description for the work queue.
is_paused: Whether or not the work queue is paused.
concurrency_limit: An optional concurrency limit for the work queue.
priority: The queue's priority. Lower values are higher priority (1 is the highest).
work_pool_name: The name of the work pool to use for this queue.
Raises:
prefect.exceptions.ObjectAlreadyExists: If request returns 409
httpx.RequestError: If request fails
Returns:
UUID: The UUID of the newly created workflow
"""
if tags:
warnings.warn(
(
"The use of tags for creating work queue filters is deprecated."
" This option will be removed on 2023-02-23."
),
DeprecationWarning,
)
filter = QueueFilter(tags=tags)
else:
filter = None
create_model = WorkQueueCreate(name=name, filter=filter)
if description is not None:
create_model.description = description
if is_paused is not None:
create_model.is_paused = is_paused
if concurrency_limit is not None:
create_model.concurrency_limit = concurrency_limit
if priority is not None:
create_model.priority = priority
data = WorkQueueCreate(name=name, filter=filter).dict(json_compatible=True)
try:
if work_pool_name is not None:
response = await self._client.post(
f"/work_pools/{work_pool_name}/queues", json=data
)
else:
response = await self._client.post("/work_queues/", json=data)
except httpx.HTTPStatusError as e:
if e.response.status_code == status.HTTP_409_CONFLICT:
raise prefect.exceptions.ObjectAlreadyExists(http_exc=e) from e
elif e.response.status_code == status.HTTP_404_NOT_FOUND:
raise prefect.exceptions.ObjectNotFound(http_exc=e) from e
else:
raise
return schemas.core.WorkQueue.parse_obj(response.json())
async def read_work_queue_by_name(
self,
name: str,
work_pool_name: Optional[str] = None,
) -> schemas.core.WorkQueue:
"""
Read a work queue by name.
Args:
name (str): a unique name for the work queue
work_pool_name (str, optional): the name of the work pool
the queue belongs to.
Raises:
prefect.exceptions.ObjectNotFound: if no work queue is found
httpx.HTTPStatusError: other status errors
Returns:
schemas.core.WorkQueue: a work queue API object
"""
try:
if work_pool_name is not None:
response = await self._client.get(
f"/work_pools/{work_pool_name}/queues/{name}"
)
else:
response = await self._client.get(f"/work_queues/name/{name}")
except httpx.HTTPStatusError as e:
if e.response.status_code == status.HTTP_404_NOT_FOUND:
raise prefect.exceptions.ObjectNotFound(http_exc=e) from e
else:
raise
return schemas.core.WorkQueue.parse_obj(response.json())
async def update_work_queue(self, id: UUID, **kwargs):
"""
Update properties of a work queue.
Args:
id: the ID of the work queue to update
**kwargs: the fields to update
Raises:
ValueError: if no kwargs are provided
prefect.exceptions.ObjectNotFound: if request returns 404
httpx.RequestError: if the request fails
"""
if not kwargs:
raise ValueError("No fields provided to update.")
data = WorkQueueUpdate(**kwargs).dict(json_compatible=True, exclude_unset=True)
try:
await self._client.patch(f"/work_queues/{id}", json=data)
except httpx.HTTPStatusError as e:
if e.response.status_code == status.HTTP_404_NOT_FOUND:
raise prefect.exceptions.ObjectNotFound(http_exc=e) from e
else:
raise
async def get_runs_in_work_queue(
self,
id: UUID,
limit: int = 10,
scheduled_before: datetime.datetime = None,
) -> List[FlowRun]:
"""
Read flow runs off a work queue.
Args:
id: the id of the work queue to read from
limit: a limit on the number of runs to return
scheduled_before: a timestamp; only runs scheduled before this time will be returned.
Defaults to now.
Raises:
prefect.exceptions.ObjectNotFound: If request returns 404
httpx.RequestError: If request fails
Returns:
List[FlowRun]: a list of FlowRun objects read from the queue
"""
if scheduled_before is None:
scheduled_before = pendulum.now()
try:
response = await self._client.post(
f"/work_queues/{id}/get_runs",
json={
"limit": limit,
"scheduled_before": scheduled_before.isoformat(),
},
)
except httpx.HTTPStatusError as e:
if e.response.status_code == status.HTTP_404_NOT_FOUND:
raise prefect.exceptions.ObjectNotFound(http_exc=e) from e
else:
raise
return pydantic.parse_obj_as(List[FlowRun], response.json())
async def read_work_queue(
self,
id: UUID,
) -> schemas.core.WorkQueue:
"""
Read a work queue.
Args:
id: the id of the work queue to load
Raises:
prefect.exceptions.ObjectNotFound: If request returns 404
httpx.RequestError: If request fails
Returns:
WorkQueue: an instantiated WorkQueue object
"""
try:
response = await self._client.get(f"/work_queues/{id}")
except httpx.HTTPStatusError as e:
if e.response.status_code == status.HTTP_404_NOT_FOUND:
raise prefect.exceptions.ObjectNotFound(http_exc=e) from e
else:
raise
return schemas.core.WorkQueue.parse_obj(response.json())
async def match_work_queues(
self,
prefixes: List[str],
) -> List[schemas.core.WorkQueue]:
"""
Query the Prefect API for work queues with names with a specific prefix.
Args:
prefixes: a list of strings used to match work queue name prefixes
Returns:
a list of WorkQueue model representations
of the work queues
"""
page_length = 100
current_page = 0
work_queues = []
while True:
new_queues = await self.read_work_queues(
offset=current_page * page_length,
limit=page_length,
work_queue_filter=schemas.filters.WorkQueueFilter(
name=schemas.filters.WorkQueueFilterName(startswith_=prefixes)
),
)
if not new_queues:
break
work_queues += new_queues
current_page += 1
return work_queues
async def delete_work_queue_by_id(
self,
id: UUID,
):
"""
Delete a work queue by its ID.
Args:
id: the id of the work queue to delete
Raises:
prefect.exceptions.ObjectNotFound: If request returns 404
httpx.RequestError: If requests fails
"""
try:
await self._client.delete(
f"/work_queues/{id}",
)
except httpx.HTTPStatusError as e:
if e.response.status_code == status.HTTP_404_NOT_FOUND:
raise prefect.exceptions.ObjectNotFound(http_exc=e) from e