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ab7d3cd508
Change distributed locking to allow taking bulk locks
across objects, reduces usually 1000 calls to 1.
Also allows for situations where multiple clients sends
delete requests to objects with following names
```
{1,2,3,4,5}
```
```
{5,4,3,2,1}
```
will block and ensure that we do not fail the request
on each other.
66 lines
2.2 KiB
Go
66 lines
2.2 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dsync
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// LockArgs is minimal required values for any dsync compatible lock operation.
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type LockArgs struct {
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// Unique ID of lock/unlock request.
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UID string
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// Resources contains single or multiple entries to be locked/unlocked.
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Resources []string
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// Source contains the line number, function and file name of the code
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// on the client node that requested the lock.
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Source string
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}
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// NetLocker is dsync compatible locker interface.
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type NetLocker interface {
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// Do read lock for given LockArgs. It should return
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// * a boolean to indicate success/failure of the operation
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// * an error on failure of lock request operation.
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RLock(args LockArgs) (bool, error)
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// Do write lock for given LockArgs. It should return
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// * a boolean to indicate success/failure of the operation
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// * an error on failure of lock request operation.
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Lock(args LockArgs) (bool, error)
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// Do read unlock for given LockArgs. It should return
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// * a boolean to indicate success/failure of the operation
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// * an error on failure of unlock request operation.
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RUnlock(args LockArgs) (bool, error)
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// Do write unlock for given LockArgs. It should return
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// * a boolean to indicate success/failure of the operation
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// * an error on failure of unlock request operation.
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Unlock(args LockArgs) (bool, error)
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// Expired returns if current lock args has expired.
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Expired(args LockArgs) (bool, error)
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// Returns underlying endpoint of this lock client instance.
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String() string
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// Close closes any underlying connection to the service endpoint
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Close() error
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// Is the underlying connection online? (is always true for any local lockers)
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IsOnline() bool
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}
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