net.jini.lease

Interface LeaseListener

All Superinterfaces:

EventListener

All Known Subinterfaces:

DesiredExpirationListener

public interface LeaseListener
extends EventListener

The interface that receivers of LeaseRenewalEvent instances must implement.

With respect to an entity that uses the LeaseRenewalManager to manage leases granted to the entity, this interface defines the mechanism through which an entity receives notification that the LeaseRenewalManager has failed to renew one of the leases the LeaseRenewalManager is managing for the entity. Such renewal failures typically occur because of one of the following conditions is met:

• After successfully renewing a lease any number of times and experiencing no failures, the LeaseRenewalManager determines, prior to the next renewal attempt, that the actual expiration time of the lease has passed, implying that any further attempt to renew the lease would be fruitless.
• An indefinite exception occurs during each attempt to renew a lease, from the point that the first such exception occurs until the point when the LeaseRenewalManager determines that lease's actual expiration time has passed.
• A bad object, bad invocation, or LeaseException occurs during a lease renewal attempt (collectively referred to as definite exceptions).

It is the responsibility of the entity to register with the LeaseRenewalManager. The object that implements this interface should define the actions to take upon receipt of such notifications. Then, when one of the above conditions occurs, the LeaseRenewalManager will send an instance of the LeaseRenewalEvent class to that listener object. Note that, prior to sending the event, the LeaseRenewalManager will remove the affected lease from its managed set of leases.

Author:

Sun Microsystems, Inc.

See Also:

Lease, LeaseRenewalManager, LeaseRenewalEvent

Method Summary

Modifier and Type	Method and Description
void	notify(LeaseRenewalEvent e) Called by the LeaseRenewalManager when it cannot renew a lease that it is managing, and the lease's desired expiration time has not yet been reached.

Method Detail

notify

void notify(LeaseRenewalEvent e)

Called by the LeaseRenewalManager when it cannot renew a lease that it is managing, and the lease's desired expiration time has not yet been reached.

Note that, prior to invoking this method, the LeaseRenewalManager removes the affected lease from the managed set of leases. Note also that, because of the reentrancy guarantee made by the LeaseRenewalManager, new leases can be safely added by this method.

Parameters:

e - instance of LeaseRenewalEvent containing information about the lease that the LeaseRenewalManager was unable to renew, as well as information about the condition that made the LeaseRenewalManager fail to renew the lease