SiteMasterPicker

```
public interface SiteMasterPicker
```
Allows an implementation to pick a SiteMaster or a Route from a list (if multiple site masters are enabled). An implementation could for example always pick the same site master (or route) for messages from a given sender (sticky site master policy, see https://issues.jboss.org/browse/JGRP-2112).
The default implementation picks a random site master for every message to be relayed, even if they have the same original sender.
If only one site master is configured, then pickSiteMaster(List,Address) (List,Address)} or pickRoute(String,List,Address) will never be called.

Since:

3.6.12, 4.0

Author:

Bela Ban

Method Summary

All Methods Instance Methods Abstract Methods
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

- Method Detail
  - pickSiteMaster
```
Address pickSiteMaster(java.util.List<Address> site_masters,
                       Address original_sender)
```
    Needs to pick a member from a list of addresses of site masters
    
    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
```
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.
    
    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