Package io.netty.resolver.dns

An alternative to Java's built-in domain name lookup mechanism that resolves a domain name asynchronously, which supports the queries of an arbitrary DNS record type as well.

Interface Summary

Interface	Description
AuthoritativeDnsServerCache	Cache which stores the nameservers that should be used to resolve a specific hostname.
DnsCache	A cache for DNS resolution entries.
DnsCacheEntry	Represents the results from a previous DNS query which can be cached.
DnsCnameCache	A cache for CNAMEs.
DnsQueryLifecycleObserver	This interface provides visibility into individual DNS queries.
DnsQueryLifecycleObserverFactory	Used to generate new instances of DnsQueryLifecycleObserver.
DnsServerAddressStream	An infinite stream of DNS server addresses.
DnsServerAddressStreamProvider	Provides an opportunity to override which DnsServerAddressStream is used to resolve a specific hostname.
DnsServerResponseFeedbackAddressStream	An infinite stream of DNS server addresses, that requests feedback to be returned to it.

Class Summary

Class	Description
BiDnsQueryLifecycleObserver	Combines two DnsQueryLifecycleObserver into a single DnsQueryLifecycleObserver.
BiDnsQueryLifecycleObserverFactory	Combines two DnsQueryLifecycleObserverFactory into a single DnsQueryLifecycleObserverFactory.
DefaultAuthoritativeDnsServerCache	Default implementation of AuthoritativeDnsServerCache, backed by a ConcurrentMap.
DefaultDnsCache	Default implementation of DnsCache, backed by a ConcurrentMap.
DefaultDnsCnameCache	Default implementation of a DnsCnameCache.
DefaultDnsServerAddressStreamProvider	A DnsServerAddressStreamProvider which will use predefined default DNS servers to use for DNS resolution.
DnsAddressResolverGroup	A AddressResolverGroup of DnsNameResolvers.
DnsNameResolver	A DNS-based InetNameResolver.
DnsNameResolverBuilder	A DnsNameResolver builder.
DnsServerAddresses	Provides an infinite sequence of DNS server addresses to DnsNameResolver.
DnsServerAddressStreamProviders	Utility methods related to DnsServerAddressStreamProvider.
LoggingDnsQueryLifeCycleObserverFactory	A DnsQueryLifecycleObserverFactory that enables detailed logging in the DnsNameResolver.
MultiDnsServerAddressStreamProvider	A DnsServerAddressStreamProvider which iterates through a collection of DnsServerAddressStreamProvider until the first non-null result is found.
NameServerComparator	Special Comparator implementation to sort the nameservers to use when follow redirects.
NoopAuthoritativeDnsServerCache	A noop AuthoritativeDnsServerCache that actually never caches anything.
NoopDnsCache	A noop DNS cache that actually never caches anything.
NoopDnsCnameCache
NoopDnsQueryLifecycleObserverFactory
RoundRobinDnsAddressResolverGroup	A AddressResolverGroup of DnsNameResolvers that supports random selection of destination addresses if multiple are provided by the nameserver.
SequentialDnsServerAddressStreamProvider	A DnsServerAddressStreamProvider which is backed by a sequential list of DNS servers.
SingletonDnsServerAddressStreamProvider	A DnsServerAddressStreamProvider which always uses a single DNS server for resolution.
UnixResolverDnsServerAddressStreamProvider	Able to parse files such as /etc/resolv.conf and /etc/resolver to respect the system default domain servers.

Enum Summary

Enum	Description
DnsNameResolverChannelStrategy	Strategy that influence how Channels are used during queries.

Exception Summary

Exception	Description
DnsErrorCauseException	A metadata carrier exception, to propagate DnsResponseCode information as an enrichment within the UnknownHostException cause.
DnsNameResolverException	A RuntimeException raised when DnsNameResolver failed to perform a successful query.
DnsNameResolverTimeoutException	A DnsNameResolverException raised when DnsNameResolver failed to perform a successful query because of an timeout.