Returns an instance of the extension identified by this ExtensionId instance.
Returns an instance of the extension identified by this ExtensionId instance.
Lookup if a DNS resolved is cached.
Lookup if a DNS resolved is cached. The exact behavior of caching will depend on the akka.actor.io.dns.resolver that is configured.
Is used by Akka to instantiate the Extension identified by this ExtensionId, internal use only.
Is used by Akka to instantiate the Extension identified by this ExtensionId, internal use only.
Java API: retrieve the Udp extension for the given system.
Java API: retrieve the Udp extension for the given system.
Returns the canonical ExtensionId for this Extension
Returns the canonical ExtensionId for this Extension
If an entry is cached return it immediately.
If an entry is cached return it immediately. If it is not then trigger a resolve and return None.