org.onosproject.store.primitives

Class DefaultDistributedLock

java.lang.Object

org.onosproject.store.service.Synchronous<AsyncDistributedLock>

org.onosproject.store.primitives.DefaultDistributedLock

All Implemented Interfaces:

DistributedLock, DistributedPrimitive

public class DefaultDistributedLock
extends Synchronous<AsyncDistributedLock>
implements DistributedLock

Default implementation for a DistributedLock backed by a AsyncDistributedLock.

Nested Class Summary

Nested classes/interfaces inherited from interface org.onosproject.store.service.DistributedPrimitive

DistributedPrimitive.Status, DistributedPrimitive.Type

Field Summary

Fields inherited from interface org.onosproject.store.service.DistributedPrimitive

DEFAULT_OPERATION_TIMEOUT_MILLIS, DEFAULT_OPERTATION_TIMEOUT_MILLIS

Constructor Summary

Constructors

Constructor and Description
DefaultDistributedLock(AsyncDistributedLock asyncLock, long operationTimeoutMillis)

Method Summary

Modifier and Type	Method and Description
Version	lock() Acquires the lock, blocking until it's available.
Optional<Version>	tryLock() Attempts to acquire the lock.
Optional<Version>	tryLock(Duration timeout) Attempts to acquire the lock for a specified amount of time.
void	unlock() Unlocks the lock.

Methods inherited from class org.onosproject.store.service.Synchronous

destroy, name, primitiveType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.onosproject.store.service.DistributedLock

primitiveType

Methods inherited from interface org.onosproject.store.service.DistributedPrimitive

addStatusChangeListener, applicationId, destroy, name, removeStatusChangeListener, statusChangeListeners

Constructor Detail

DefaultDistributedLock

public DefaultDistributedLock(AsyncDistributedLock asyncLock,
                              long operationTimeoutMillis)

Method Detail

lock

public Version lock()

Description copied from interface: DistributedLock

Acquires the lock, blocking until it's available.

Specified by:

lock in interface DistributedLock

Returns:

the acquired lock version

tryLock

public Optional<Version> tryLock()

Description copied from interface: DistributedLock

Attempts to acquire the lock.

Specified by:

tryLock in interface DistributedLock

Returns:

indicates whether the lock was acquired

tryLock

public Optional<Version> tryLock(Duration timeout)

Description copied from interface: DistributedLock

Attempts to acquire the lock for a specified amount of time.

Specified by:

tryLock in interface DistributedLock

Parameters:

timeout - the timeout after which to give up attempting to acquire the lock

Returns:

indicates whether the lock was acquired

unlock

public void unlock()

Description copied from interface: DistributedLock

Unlocks the lock.

Specified by:

unlock in interface DistributedLock