github.com/m3db/m3@v1.5.0/src/dbnode/storage/block/lease_noop.go (about)

     1  // Copyright (c) 2019 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package block
    22  
    23  // NoopLeaseManager is a no-op implementation of LeaseManager.
    24  type NoopLeaseManager struct{}
    25  
    26  func (n *NoopLeaseManager) RegisterLeaser(leaser Leaser) error {
    27  	return nil
    28  }
    29  
    30  func (n *NoopLeaseManager) UnregisterLeaser(leaser Leaser) error {
    31  	return nil
    32  }
    33  
    34  func (n *NoopLeaseManager) OpenLease(
    35  	leaser Leaser,
    36  	descriptor LeaseDescriptor,
    37  	state LeaseState,
    38  ) error {
    39  	return nil
    40  }
    41  
    42  func (n *NoopLeaseManager) OpenLatestLease(
    43  	leaser Leaser,
    44  	descriptor LeaseDescriptor,
    45  ) (LeaseState, error) {
    46  	return LeaseState{}, nil
    47  }
    48  
    49  func (n *NoopLeaseManager) UpdateOpenLeases(
    50  	descriptor LeaseDescriptor,
    51  	state LeaseState,
    52  ) (UpdateLeasesResult, error) {
    53  	return UpdateLeasesResult{}, nil
    54  }
    55  
    56  func (n *NoopLeaseManager) SetLeaseVerifier(leaseVerifier LeaseVerifier) error {
    57  	return nil
    58  }