# -------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for
# license information.
# --------------------------------------------------------------------------
# pylint: disable=invalid-overridden-method
from typing import ( # pylint: disable=unused-import
Union, Optional, Any, IO, Iterable, AnyStr, Dict, List, Tuple,
TypeVar, TYPE_CHECKING
)
from azure.core.exceptions import HttpResponseError
from azure.core.tracing.decorator_async import distributed_trace_async
from .._shared.response_handlers import return_response_headers, process_storage_error
from .._generated.aio.operations import FileOperations, ShareOperations
from .._lease import ShareLeaseClient as LeaseClientBase
if TYPE_CHECKING:
from datetime import datetime
ShareFileClient = TypeVar("ShareFileClient")
ShareClient = TypeVar("ShareClient")
[docs]class ShareLeaseClient(LeaseClientBase):
"""Creates a new ShareLeaseClient.
This client provides lease operations on a ShareClient or ShareFileClient.
:ivar str id:
The ID of the lease currently being maintained. This will be `None` if no
lease has yet been acquired.
:ivar str etag:
The ETag of the lease currently being maintained. This will be `None` if no
lease has yet been acquired or modified.
:ivar ~datetime.datetime last_modified:
The last modified timestamp of the lease currently being maintained.
This will be `None` if no lease has yet been acquired or modified.
:param client:
The client of the file or share to lease.
:type client: ~azure.storage.fileshare.ShareFileClient or
~azure.storage.fileshare.ShareClient
:param str lease_id:
A string representing the lease ID of an existing lease. This value does not
need to be specified in order to acquire a new lease, or break one.
"""
def __enter__(self):
raise TypeError("Async lease must use 'async with'.")
def __exit__(self, *args):
self.release()
async def __aenter__(self):
return self
async def __aexit__(self, *args):
await self.release()
[docs] @distributed_trace_async
async def acquire(self, **kwargs):
# type: (**Any) -> None
"""Requests a new lease. This operation establishes and manages a lock on a
file or share for write and delete operations. If the file or share does not have an active lease,
the File or Share service creates a lease on the file or share. If the file has an active lease,
you can only request a new lease using the active lease ID.
If the file or share does not have an active lease, the File or Share service creates a
lease on the file and returns a new lease ID.
:keyword int lease_duration:
Specifies the duration of the lease, in seconds, or negative one
(-1) for a lease that never expires. File leases never expire. A non-infinite share lease can be
between 15 and 60 seconds. A share lease duration cannot be changed
using renew or change. Default is -1 (infinite share lease).
:keyword int timeout:
The timeout parameter is expressed in seconds.
:rtype: None
"""
try:
lease_duration = kwargs.pop('lease_duration', -1)
if self._snapshot:
kwargs['sharesnapshot'] = self._snapshot
response = await self._client.acquire_lease(
timeout=kwargs.pop('timeout', None),
duration=lease_duration,
proposed_lease_id=self.id,
cls=return_response_headers,
**kwargs)
except HttpResponseError as error:
process_storage_error(error)
self.id = response.get('lease_id') # type: str
self.last_modified = response.get('last_modified') # type: datetime
self.etag = response.get('etag') # type: str
[docs] @distributed_trace_async
async def renew(self, **kwargs):
# type: (Any) -> None
"""Renews the share lease.
The share lease can be renewed if the lease ID specified in the
lease client matches that associated with the share. Note that
the lease may be renewed even if it has expired as long as the share
has not been leased again since the expiration of that lease. When you
renew a lease, the lease duration clock resets.
.. versionadded:: 12.6.0
:keyword int timeout:
The timeout parameter is expressed in seconds.
:return: None
"""
if isinstance(self._client, FileOperations):
raise TypeError("Lease renewal operations are only valid for ShareClient.")
try:
response = await self._client.renew_lease(
lease_id=self.id,
timeout=kwargs.pop('timeout', None),
sharesnapshot=self._snapshot,
cls=return_response_headers,
**kwargs)
except HttpResponseError as error:
process_storage_error(error)
self.etag = response.get('etag') # type: str
self.id = response.get('lease_id') # type: str
self.last_modified = response.get('last_modified') # type: datetime
[docs] @distributed_trace_async
async def release(self, **kwargs):
# type: (Any) -> None
"""Releases the lease. The lease may be released if the lease ID specified on the request matches
that associated with the share or file. Releasing the lease allows another client to immediately acquire
the lease for the share or file as soon as the release is complete.
:keyword int timeout:
The timeout parameter is expressed in seconds.
:return: None
"""
try:
if self._snapshot:
kwargs['sharesnapshot'] = self._snapshot
response = await self._client.release_lease(
lease_id=self.id,
timeout=kwargs.pop('timeout', None),
cls=return_response_headers,
**kwargs)
except HttpResponseError as error:
process_storage_error(error)
self.etag = response.get('etag') # type: str
self.id = response.get('lease_id') # type: str
self.last_modified = response.get('last_modified') # type: datetime
[docs] @distributed_trace_async
async def change(self, proposed_lease_id, **kwargs):
# type: (str, Any) -> None
""" Changes the lease ID of an active lease. A change must include the current lease ID in x-ms-lease-id and
a new lease ID in x-ms-proposed-lease-id.
:param str proposed_lease_id:
Proposed lease ID, in a GUID string format. The File or Share service raises an error
(Invalid request) if the proposed lease ID is not in the correct format.
:keyword int timeout:
The timeout parameter is expressed in seconds.
:return: None
"""
try:
if self._snapshot:
kwargs['sharesnapshot'] = self._snapshot
response = await self._client.change_lease(
lease_id=self.id,
proposed_lease_id=proposed_lease_id,
timeout=kwargs.pop('timeout', None),
cls=return_response_headers,
**kwargs)
except HttpResponseError as error:
process_storage_error(error)
self.etag = response.get('etag') # type: str
self.id = response.get('lease_id') # type: str
self.last_modified = response.get('last_modified') # type: datetime
[docs] @distributed_trace_async
async def break_lease(self, **kwargs):
# type: (Any) -> int
"""Force breaks the lease if the file or share has an active lease. Any authorized request can break the lease;
the request is not required to specify a matching lease ID. An infinite lease breaks immediately.
Once a lease is broken, it cannot be changed. Any authorized request can break the lease;
the request is not required to specify a matching lease ID.
When a lease is successfully broken, the response indicates the interval
in seconds until a new lease can be acquired.
:keyword int lease_break_period:
This is the proposed duration of seconds that the share lease
should continue before it is broken, between 0 and 60 seconds. This
break period is only used if it is shorter than the time remaining
on the share lease. If longer, the time remaining on the share lease is used.
A new share lease will not be available before the break period has
expired, but the share lease may be held for longer than the break
period. If this header does not appear with a break
operation, a fixed-duration share lease breaks after the remaining share lease
period elapses, and an infinite share lease breaks immediately.
.. versionadded:: 12.5.0
:keyword int timeout:
The timeout parameter is expressed in seconds.
:return: Approximate time remaining in the lease period, in seconds.
:rtype: int
"""
try:
lease_break_period = kwargs.pop('lease_break_period', None)
if self._snapshot:
kwargs['sharesnapshot'] = self._snapshot
if isinstance(self._client, ShareOperations):
kwargs['break_period'] = lease_break_period
if isinstance(self._client, FileOperations) and lease_break_period:
raise TypeError("Setting a lease break period is only applicable to Share leases.")
response = await self._client.break_lease(
timeout=kwargs.pop('timeout', None),
cls=return_response_headers,
**kwargs)
except HttpResponseError as error:
process_storage_error(error)
return response.get('lease_time') # type: ignore