DnsResolver (OpenNMS 28.0.0 API)

All Known Implementing Classes:

NettyDnsResolver, NettyResolverContext
```
public interface DnsResolver
```
Asynchronous DNS resolution.

Author:

jwhite

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.util.concurrent.CompletableFuture<java.util.Optional<java.net.InetAddress>>`	`lookup(java.lang.String hostname)`	Perform a DNS lookup for the given hostname.
`java.util.concurrent.CompletableFuture<java.util.Optional<java.lang.String>>`	`reverseLookup(java.net.InetAddress inetAddress)`	Perform a reverse DNS lookup for the given IP address.

- Method Detail
  - lookup
```
java.util.concurrent.CompletableFuture<java.util.Optional<java.net.InetAddress>> lookup(java.lang.String hostname)
```
    Perform a DNS lookup for the given hostname. Returns a future that contains the lookup results. If the optional is empty the lookup was completed but no result was found.
    
    Parameters:
    
    hostname - hostname to lookup
    
    Returns:
    
    a future
  - reverseLookup
```
java.util.concurrent.CompletableFuture<java.util.Optional<java.lang.String>> reverseLookup(java.net.InetAddress inetAddress)
```
    Perform a reverse DNS lookup for the given IP address. Returns a future that contains the lookup results. If the optional is empty the lookup was completed but no result was found.
    
    Parameters:
    
    inetAddress - IP address to lookup
    
    Returns:
    
    a future