DataLakeLeaseClient class
Definition
Creates a new DataLakeLeaseClient.
This client provides lease operations on a FileSystemClient, DataLakeDirectoryClient or DataLakeFileClient.
DataLakeLeaseClient(client, lease_id=None)
- Inheritance
-
builtins.objectDataLakeLeaseClient
Parameters
- client
- FileSystemClient or DataLakeDirectoryClient or DataLakeFileClient
The client of the file system, directory, or file to lease.
- lease_id
- str
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.
Variables
- id
- str
- etag
- str
- last_modified
- datetime.datetime
Methods
| acquire |
Requests a new lease. If the file/file system does not have an active lease, the DataLake service creates a lease on the file/file system and returns a new lease ID. |
| break_lease |
Break the lease, if the file system or file has an active lease. Once a lease is broken, it cannot be renewed. Any authorized request can break the lease; the request is not required to specify a matching lease ID. When a lease is broken, the lease break period is allowed to elapse, during which time no lease operation except break and release can be performed on the file system or file. When a lease is successfully broken, the response indicates the interval in seconds until a new lease can be acquired. |
| change |
Change the lease ID of an active lease. |
| release |
Release the lease. The lease may be released if the client lease id specified matches that associated with the file system or file. Releasing the lease allows another client to immediately acquire the lease for the file system or file as soon as the release is complete. |
| renew |
Renews the lease. The lease can be renewed if the lease ID specified in the lease client matches that associated with the file system or file. Note that the lease may be renewed even if it has expired as long as the file system or file has not been leased again since the expiration of that lease. When you renew a lease, the lease duration clock resets. |
acquire
Requests a new lease.
If the file/file system does not have an active lease, the DataLake service creates a lease on the file/file system and returns a new lease ID.
acquire(lease_duration=-1, **kwargs)
Parameters
- lease_duration
- int
Specifies the duration of the lease, in seconds, or negative one (-1) for a lease that never expires. A non-infinite lease can be between 15 and 60 seconds. A lease duration cannot be changed using renew or change. Default is -1 (infinite lease).
Return type
break_lease
Break the lease, if the file system or file has an active lease.
Once a lease is broken, it cannot be renewed. Any authorized request can break the lease; the request is not required to specify a matching lease ID. When a lease is broken, the lease break period is allowed to elapse, during which time no lease operation except break and release can be performed on the file system or file. When a lease is successfully broken, the response indicates the interval in seconds until a new lease can be acquired.
break_lease(lease_break_period=None, **kwargs)
Parameters
- lease_break_period
- int
This is the proposed duration of seconds that the 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 lease. If longer, the time remaining on the lease is used. A new lease will not be available before the break period has expired, but the lease may be held for longer than the break period. If this header does not appear with a break operation, a fixed-duration lease breaks after the remaining lease period elapses, and an infinite lease breaks immediately.
Returns
Approximate time remaining in the lease period, in seconds.
Return type
change
Change the lease ID of an active lease.
change(proposed_lease_id, **kwargs)
Parameters
- proposed_lease_id
- str
Proposed lease ID, in a GUID string format. The DataLake service returns 400 (Invalid request) if the proposed lease ID is not in the correct format.
Returns
None
release
Release the lease.
The lease may be released if the client lease id specified matches that associated with the file system or file. Releasing the lease allows another client to immediately acquire the lease for the file system or file as soon as the release is complete.
release(**kwargs)
Returns
None
renew
Renews the lease.
The lease can be renewed if the lease ID specified in the lease client matches that associated with the file system or file. Note that the lease may be renewed even if it has expired as long as the file system or file has not been leased again since the expiration of that lease. When you renew a lease, the lease duration clock resets.
renew(**kwargs)
Returns
None