Interface DistributedConfigSetLockFactory
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ZkDistributedConfigSetLockFactory
public interface DistributedConfigSetLockFactory
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description DistributedLockcreateLock(boolean isWriteLock, String configSetName)Create a new lock of the specified type (read or write) entering the "competition" for actually getting the lock for theconfigSetName
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Method Detail
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createLock
DistributedLock createLock(boolean isWriteLock, String configSetName)
Create a new lock of the specified type (read or write) entering the "competition" for actually getting the lock for theconfigSetNameUpon return from this call, the lock has not been acquired but the it had entered the lock acquiring "competition", and the caller can decide to wait until the lock is granted by calling
DistributedLock.waitUntilAcquired().
Separating the lock creation from lock acquisition allows a more deterministic release of the locks when/if they can't be acquired.Locks at different paths are independent of each other, multiple
DistributedLockare therefore requested for a single operation and are packaged together and returned as anDistributedMultiLock, seeCollectionApiLockFactory.createCollectionApiLock(org.apache.solr.common.params.CollectionParams.LockLevel, java.lang.String, java.lang.String, java.lang.String)orConfigSetApiLockFactory.createConfigSetApiLock(java.lang.String, java.lang.String).- Parameters:
isWriteLock-trueif requesting a write lock,falsefor a read lock.configSetName- the config set name, can never benull.- Returns:
- a lock instance that must be
DistributedLock.release()'ed in afinally, regardless of the lock having been acquired or not.
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