io.netty.resolver.dns

Class DefaultAuthoritativeDnsServerCache

java.lang.Object

io.netty.resolver.dns.DefaultAuthoritativeDnsServerCache

All Implemented Interfaces:

AuthoritativeDnsServerCache

public class DefaultAuthoritativeDnsServerCache
extends Object
implements AuthoritativeDnsServerCache

Default implementation of AuthoritativeDnsServerCache, backed by a ConcurrentMap.

Constructor Summary

Constructors

Constructor and Description
DefaultAuthoritativeDnsServerCache() Create a cache that respects the TTL returned by the DNS server.
DefaultAuthoritativeDnsServerCache(int minTtl, int maxTtl, Comparator<InetSocketAddress> comparator) Create a cache.

Method Summary

Modifier and Type	Method and Description
void	cache(String hostname, InetSocketAddress address, long originalTtl, EventLoop loop) Caches a nameserver that should be used to resolve the given hostname.
void	clear() Clears all cached nameservers.
boolean	clear(String hostname) Clears the cached nameservers for the specified hostname.
DnsServerAddressStream	get(String hostname) Returns the cached nameservers that should be used to resolve the given hostname.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DefaultAuthoritativeDnsServerCache

public DefaultAuthoritativeDnsServerCache()

Create a cache that respects the TTL returned by the DNS server.

DefaultAuthoritativeDnsServerCache

public DefaultAuthoritativeDnsServerCache(int minTtl,
                                          int maxTtl,
                                          Comparator<InetSocketAddress> comparator)

Create a cache.

Parameters:

minTtl - the minimum TTL

maxTtl - the maximum TTL

comparator - the Comparator to order the InetSocketAddress for a hostname or null if insertion order should be used.

Method Detail

get

public DnsServerAddressStream get(String hostname)

Description copied from interface: AuthoritativeDnsServerCache

Returns the cached nameservers that should be used to resolve the given hostname. The returned DnsServerAddressStream may contain unresolved InetSocketAddresses that will be resolved when needed while resolving other domain names.

Specified by:

get in interface AuthoritativeDnsServerCache

Parameters:

hostname - the hostname

Returns:

the cached entries or an null if none.

cache

public void cache(String hostname,
                  InetSocketAddress address,
                  long originalTtl,
                  EventLoop loop)

Description copied from interface: AuthoritativeDnsServerCache

Caches a nameserver that should be used to resolve the given hostname.

Specified by:

cache in interface AuthoritativeDnsServerCache

Parameters:

hostname - the hostname

address - the nameserver address (which may be unresolved).

originalTtl - the TTL as returned by the DNS server

loop - the EventLoop used to register the TTL timeout

clear

public void clear()

Description copied from interface: AuthoritativeDnsServerCache

Clears all cached nameservers.

Specified by:

clear in interface AuthoritativeDnsServerCache

See Also:

AuthoritativeDnsServerCache.clear(String)

clear

public boolean clear(String hostname)

Description copied from interface: AuthoritativeDnsServerCache

Clears the cached nameservers for the specified hostname.

Specified by:

clear in interface AuthoritativeDnsServerCache

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

toString

public String toString()

Overrides:

toString in class Object