CanConnect tests if a connection to host:port can be made (with a 1s timeout).

IsAlgorithm checks if the specified algo is valid.

Select returns a destination among the destinations according to the specified algo.

DefaultAlgorithm is the default algorithm used to find a route if no other algorithm is specified in configuration.

DefaultRouteKeyword is the keyword used to specify the default route.

BasicHostChecker implements the HostChecker interface.

HostChecker is the interface that wraps the Check method.