com.netflix.eureka.lease

Interface LeaseManager<T>

Type Parameters:

T -

All Known Subinterfaces:

InstanceRegistry, PeerAwareInstanceRegistry

All Known Implementing Classes:

AbstractInstanceRegistry, AwsInstanceRegistry, PeerAwareInstanceRegistryImpl

public interface LeaseManager<T>

This class is responsible for creating/renewing and evicting a lease for a particular instance.

Leases determine what instances receive traffic. When there is no renewal request from the client, the lease gets expired and the instances are evicted out of AbstractInstanceRegistry. This is key to instances receiving traffic or not.

Method Summary

Modifier and Type	Method and Description
boolean	cancel(java.lang.String appName, java.lang.String id, boolean isReplication) Cancel the Lease associated w/ the passed in appName and id.
void	evict() Evict Ts with expired Lease(s).
void	register(T r, int leaseDuration, boolean isReplication) Assign a new Lease to the passed in T.
boolean	renew(java.lang.String appName, java.lang.String id, boolean isReplication) Renew the Lease associated w/ the passed in appName and id.

Method Detail

register

void register(T r,
              int leaseDuration,
              boolean isReplication)

Assign a new Lease to the passed in T.

Parameters:

r - - T to register

leaseDuration -

isReplication - - whether this is a replicated entry from another eureka node.

cancel

boolean cancel(java.lang.String appName,
               java.lang.String id,
               boolean isReplication)

Cancel the Lease associated w/ the passed in appName and id.

Parameters:

appName - - unique id of the application.

id - - unique id within appName.

isReplication - - whether this is a replicated entry from another eureka node.

Returns:

true, if the operation was successful, false otherwise.

renew

boolean renew(java.lang.String appName,
              java.lang.String id,
              boolean isReplication)

Renew the Lease associated w/ the passed in appName and id.

Parameters:

id - - unique id within appName

isReplication - - whether this is a replicated entry from another ds node

Returns:

whether the operation of successful

evict

void evict()

Evict Ts with expired Lease(s).