Package org.jgroups.protocols.relay

Class StickySiteMasterPicker

java.lang.Object

org.jgroups.protocols.relay.RandomSiteMasterPicker

org.jgroups.protocols.relay.StickySiteMasterPicker

All Implemented Interfaces:

SiteMasterPicker

public class StickySiteMasterPicker
extends RandomSiteMasterPicker

Picks a local site master or a route based on the sender and caches the decision. Next time, the same local site master or route will be returned. If no route exists yet, a random local site master or route is picked.

Since:

5.3.1

Author:

Bela Ban

Field Summary

Fields

Modifier and Type	Field	Description
protected java.util.Map<Address,Address>	local_sm_cache
protected java.util.Map<Address,Route>	route_cache

Fields inherited from class org.jgroups.protocols.relay.RandomSiteMasterPicker

addr_supplier, verbose

Constructor Summary

Constructors

Constructor	Description
StickySiteMasterPicker()

Method Summary

Modifier and Type	Method	Description
Route	pickRoute(java.lang.String site, java.util.List<Route> routes, Address original_sender)	Picks a route to a given remote site from a list of routes.
Address	pickSiteMaster(java.util.List<Address> site_masters, Address original_sender)	Needs to pick a member from a list of addresses of site masters

Methods inherited from class org.jgroups.protocols.relay.RandomSiteMasterPicker

addressSupplier, verbose, verbose

Methods inherited from class java.lang.Object

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

Field Detail

local_sm_cache

protected java.util.Map<Address,Address> local_sm_cache

route_cache

protected java.util.Map<Address,Route> route_cache

Constructor Detail

StickySiteMasterPicker

public StickySiteMasterPicker()

Method Detail

pickSiteMaster

public Address pickSiteMaster(java.util.List<Address> site_masters,
                              Address original_sender)

Description copied from interface: SiteMasterPicker

Needs to pick a member from a list of addresses of site masters

Specified by:

pickSiteMaster in interface SiteMasterPicker

Overrides:

pickSiteMaster in class RandomSiteMasterPicker

Parameters:

site_masters - The list of site masters

original_sender - The address of the original member sending a message

Returns:

The address of the site master (in the local cluster) to be used to forward the message to

pickRoute

public Route pickRoute(java.lang.String site,
                       java.util.List<Route> routes,
                       Address original_sender)

Description copied from interface: SiteMasterPicker

Picks a route to a given remote site from a list of routes.

Specified by:

pickRoute in interface SiteMasterPicker

Overrides:

pickRoute in class RandomSiteMasterPicker

Parameters:

site - The name of the target (remote) site. Added for informational purposes; may or may not be used as selection criterium.

routes - The list of routes. A route can be picked for example by using the address of the remote site master: Route.siteMaster()

original_sender - The address of the original sender

Returns:

A route