open fun rxPutIfAbsent(: K, : V): Single<V>
Put the entry only if there is no entry with the key already present. If key already present then the existing value will be returned to the handler, otherwise null.
Return
open fun rxPutIfAbsent(: K, : V, : Long): Single<V>
Link io.vertx.reactivex.core.shareddata.AsyncMap#putIfAbsent but specifying a time to live for the entry. Entry will expire and get evicted after the ttl.
ttl - The time to live (in ms) for the entry
Return