Package io.netty.resolver.dns

Class DefaultDnsCnameCache

java.lang.Object

io.netty.resolver.dns.DefaultDnsCnameCache

All Implemented Interfaces:

DnsCnameCache

public final class DefaultDnsCnameCache
extends Object
implements DnsCnameCache

Default implementation of a DnsCnameCache.

Field Summary

Fields

Modifier and Type	Field	Description
private final Cache<String>	cache
private final int	maxTtl
private final int	minTtl

Constructor Summary

Constructors

Constructor	Description
DefaultDnsCnameCache()	Create a cache that respects the TTL returned by the DNS server.
DefaultDnsCnameCache(int minTtl, int maxTtl)	Create a cache.

Method Summary

Modifier and Type	Method	Description
void	cache(String hostname, String cname, long originalTtl, EventLoop loop)	Caches a cname entry that should be used for the given hostname.
void	clear()	Clears all cached nameservers.
boolean	clear(String hostname)	Clears the cached nameservers for the specified hostname.
String	get(String hostname)	Returns the cached cname for the given hostname.
(package private) int	maxTtl()
(package private) int	minTtl()

Methods inherited from class java.lang.Object

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

Field Details

minTtl

private final int minTtl

maxTtl

private final int maxTtl

cache

private final Cache<String> cache

Constructor Details

DefaultDnsCnameCache

public DefaultDnsCnameCache()

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

DefaultDnsCnameCache

public DefaultDnsCnameCache(int minTtl,
 int maxTtl)

Create a cache.

Parameters:

minTtl - the minimum TTL

maxTtl - the maximum TTL

Method Details

get

public String get(String hostname)

Description copied from interface: DnsCnameCache

Returns the cached cname for the given hostname.

Specified by:

get in interface DnsCnameCache

Parameters:

hostname - the hostname

Returns:

the cached entries or an null if none.

cache

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

Description copied from interface: DnsCnameCache

Caches a cname entry that should be used for the given hostname.

Specified by:

cache in interface DnsCnameCache

Parameters:

hostname - the hostname

cname - the cname mapping.

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: DnsCnameCache

Clears all cached nameservers.

Specified by:

clear in interface DnsCnameCache

See Also:

• DnsCnameCache.clear(String)

clear

public boolean clear(String hostname)

Description copied from interface: DnsCnameCache

Clears the cached nameservers for the specified hostname.

Specified by:

clear in interface DnsCnameCache

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

minTtl

int minTtl()

maxTtl

int maxTtl()