com.amazonaws.services.kinesis.leases.impl

Class GenericLeaseSelector<T extends Lease>

java.lang.Object

com.amazonaws.services.kinesis.leases.impl.GenericLeaseSelector<T>

All Implemented Interfaces:

LeaseSelector<T>

public class GenericLeaseSelector<T extends Lease>
extends Object
implements LeaseSelector<T>

GenericLeaseSelector abstracts away the lease selection logic from the application code that's using leasing. It owns filtering of the leases to be taken.

Constructor Summary

Constructors

Constructor and Description
GenericLeaseSelector()

Method Summary

Modifier and Type	Method and Description
int	getLeaseCountThatCanBeTaken(Collection<T> allLeases) Provides the number of leases that should be taken by the worker.
Set<T>	getLeasesToTakeFromExpiredLeases(List<T> expiredLeases, int numLeasesToReachTarget) Provides the list of leases to be taken.

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericLeaseSelector

public GenericLeaseSelector()

Method Detail

getLeasesToTakeFromExpiredLeases

public Set<T> getLeasesToTakeFromExpiredLeases(List<T> expiredLeases,
                                               int numLeasesToReachTarget)

Provides the list of leases to be taken.

Specified by:

getLeasesToTakeFromExpiredLeases in interface LeaseSelector<T extends Lease>

Parameters:

expiredLeases - list of leases that are currently expired

numLeasesToReachTarget - the number of leases to be taken

Returns:

getLeaseCountThatCanBeTaken

public int getLeaseCountThatCanBeTaken(Collection<T> allLeases)

Provides the number of leases that should be taken by the worker.

Specified by:

getLeaseCountThatCanBeTaken in interface LeaseSelector<T extends Lease>

Parameters:

allLeases - list of all existing leases

Returns: