Interface DnsCache

All Known Implementing Classes:
DefaultDnsCache, NoopDnsCache
public interface DnsCache
A cache for DNS resolution entries.

  • Method Details

    • clear

      void clear()
      Clears all the resolved addresses cached by this resolver.
      See Also:

    • clear

      boolean clear(String hostname)
      Clears the resolved addresses of the specified host name from the cache of this resolver.
      Returns:
      true if and only if there was an entry for the specified host name in the cache and it has been removed by this method

    • get

      List<? extends DnsCacheEntry> get(String hostname, DnsRecord[] additionals)
      Return the cached entries for the given hostname.
      Parameters:
      hostname - the hostname
      additionals - the additional records
      Returns:
      the cached entries

    • cache

      DnsCacheEntry cache(String hostname, DnsRecord[] additionals, InetAddress address, long originalTtl, EventLoop loop)
      Create a new DnsCacheEntry and cache a resolved address for a given hostname.
      Parameters:
      hostname - the hostname
      additionals - the additional records
      address - the resolved address
      originalTtl - the TTL as returned by the DNS server
      loop - the EventLoop used to register the TTL timeout
      Returns:
      The DnsCacheEntry corresponding to this cache entry.

    • cache

      DnsCacheEntry cache(String hostname, DnsRecord[] additionals, Throwable cause, EventLoop loop)
      Cache the resolution failure for a given hostname. Be aware this won't be called with timeout / cancel / transport exceptions.
      Parameters:
      hostname - the hostname
      additionals - the additional records
      cause - the resolution failure
      loop - the EventLoop used to register the TTL timeout
      Returns:
      The DnsCacheEntry corresponding to this cache entry, or null if this cache doesn't support caching failed responses.