org.apache.river.mahalo

Class LeaseExpirationMgr

java.lang.Object

org.apache.river.mahalo.LeaseExpirationMgr

All Implemented Interfaces:

WeakTable.KeyGCHandler, LeaseManager

class LeaseExpirationMgr
extends Object
implements LeaseManager, WeakTable.KeyGCHandler

Lease Mgr implementation that aggressively expires leases as they expiration times occur. Synchronizes on resource before canceling it.

Author:

Sun Microsystems, Inc.

See Also:

LeaseManager

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	LeaseExpirationMgr.Canceler Objects that do the actually cancel the resource in question, stuck in WakeupManager
(package private) static interface	LeaseExpirationMgr.Expirer Interface that allows LeaseExpirationMgr to expire resources.

Field Summary

Fields

Modifier and Type	Field and Description
private WakeupManager	expirationQueue
private LeaseExpirationMgr.Expirer	landlord
private WeakTable	ticketMap

Constructor Summary

Constructors

Constructor and Description
LeaseExpirationMgr(LeaseExpirationMgr.Expirer landlord) Create a LeaseExpirationMgr to aggressively expire the leases of the passed landlord (implementing Expirer is trivial for a Landlord.

Method Summary

Modifier and Type	Method and Description
void	keyGC(Object value) Called by WeakTable when it notices that a key has been collected and the value still exists.
void	register(LeasedResource resource) Notifies the manager of a new lease being created.
void	renewed(LeasedResource resource) Notifies the manager of a lease being renewed.
private void	schedule(LeasedResource resource) Schedule a leased resource to be reaped in the future.
(package private) void	terminate() Terminate the LeaseExpirationMgr, killing any threads it has started

Methods inherited from class java.lang.Object

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

Field Detail

ticketMap

private final WeakTable ticketMap

landlord

private final LeaseExpirationMgr.Expirer landlord

expirationQueue

private final WakeupManager expirationQueue

Constructor Detail

LeaseExpirationMgr

LeaseExpirationMgr(LeaseExpirationMgr.Expirer landlord)

Create a LeaseExpirationMgr to aggressively expire the leases of the passed landlord (implementing Expirer is trivial for a Landlord.

Method Detail

terminate

void terminate()

Terminate the LeaseExpirationMgr, killing any threads it has started

register

public void register(LeasedResource resource)

Description copied from interface: LeaseManager

Notifies the manager of a new lease being created.

Specified by:

register in interface LeaseManager

Parameters:

resource - The resource associated with the new Lease.

renewed

public void renewed(LeasedResource resource)

Description copied from interface: LeaseManager

Notifies the manager of a lease being renewed.

Specified by:

renewed in interface LeaseManager

Parameters:

resource - The resource associated with the new Lease.

schedule

private void schedule(LeasedResource resource)

Schedule a leased resource to be reaped in the future. Called when a resource gets a lease, or a lease is renewed.

keyGC

public void keyGC(Object value)

Description copied from interface: WeakTable.KeyGCHandler

Called by WeakTable when it notices that a key has been collected and the value still exists.

Specified by:

keyGC in interface WeakTable.KeyGCHandler

Parameters:

value - The value associated with the collected key