public class SupplyKeyMatchingValueOrNull<K,V>
extends Object
implements com.google.common.base.Supplier<K>
Allows you to lazy discover a key by value. This is useful for example in service discovery,
where you need to see what the "current" service name is based on a map of service names to
endpoints.
note
take care to memoize this using Suppliers.memoize(Supplier)
public SupplyKeyMatchingValueOrNull(com.google.common.base.Supplier<Map<K,com.google.common.base.Supplier<V>>> supplier,
com.google.common.base.Supplier<V> valueSupplier)