io.netty.resolver.dns

类 DefaultDnsCache

java.lang.Object

io.netty.resolver.dns.DefaultDnsCache

所有已实现的接口:

DnsCache

public class DefaultDnsCache
extends java.lang.Object
implements DnsCache

Default implementation of DnsCache, backed by a ConcurrentMap. If any additional DnsRecord is used, no caching takes place.

构造器概要

构造器

构造器和说明
DefaultDnsCache() Create a cache that respects the TTL returned by the DNS server and doesn't cache negative responses.
DefaultDnsCache(int minTtl, int maxTtl, int negativeTtl) Create a cache.

方法概要

限定符和类型	方法和说明
DnsCacheEntry	cache(java.lang.String hostname, DnsRecord[] additionals, java.net.InetAddress address, long originalTtl, EventLoop loop) Create a new DnsCacheEntry and cache a resolved address for a given hostname.
DnsCacheEntry	cache(java.lang.String hostname, DnsRecord[] additionals, java.lang.Throwable cause, EventLoop loop) Cache the resolution failure for a given hostname.
void	clear() Clears all the resolved addresses cached by this resolver.
boolean	clear(java.lang.String hostname) Clears the resolved addresses of the specified host name from the cache of this resolver.
java.util.List<? extends DnsCacheEntry>	get(java.lang.String hostname, DnsRecord[] additionals) Return the cached entries for the given hostname.
int	maxTtl() Returns the maximum TTL of the cached DNS resource records (in seconds).
int	minTtl() Returns the minimum TTL of the cached DNS resource records (in seconds).
int	negativeTtl() Returns the TTL of the cache for the failed DNS queries (in seconds).
java.lang.String	toString()

从类继承的方法 java.lang.Object

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

构造器详细资料

DefaultDnsCache

public DefaultDnsCache()

Create a cache that respects the TTL returned by the DNS server and doesn't cache negative responses.

DefaultDnsCache

public DefaultDnsCache(int minTtl,
                       int maxTtl,
                       int negativeTtl)

Create a cache.

参数:

minTtl - the minimum TTL

maxTtl - the maximum TTL

negativeTtl - the TTL for failed queries

方法详细资料

minTtl

public int minTtl()

Returns the minimum TTL of the cached DNS resource records (in seconds).

另请参阅:

maxTtl()

maxTtl

public int maxTtl()

Returns the maximum TTL of the cached DNS resource records (in seconds).

另请参阅:

minTtl()

negativeTtl

public int negativeTtl()

Returns the TTL of the cache for the failed DNS queries (in seconds). The default value is 0, which disables the cache for negative results.

clear

public void clear()

从接口复制的说明: DnsCache

Clears all the resolved addresses cached by this resolver.

指定者:

clear 在接口中 DnsCache

另请参阅:

DnsCache.clear(String)

clear

public boolean clear(java.lang.String hostname)

从接口复制的说明: DnsCache

Clears the resolved addresses of the specified host name from the cache of this resolver.

指定者:

clear 在接口中 DnsCache

返回:

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

public java.util.List<? extends DnsCacheEntry> get(java.lang.String hostname,
                                                   DnsRecord[] additionals)

从接口复制的说明: DnsCache

Return the cached entries for the given hostname.

指定者:

get 在接口中 DnsCache

参数:

hostname - the hostname

additionals - the additional records

返回:

the cached entries

cache

public DnsCacheEntry cache(java.lang.String hostname,
                           DnsRecord[] additionals,
                           java.net.InetAddress address,
                           long originalTtl,
                           EventLoop loop)

从接口复制的说明: DnsCache

Create a new DnsCacheEntry and cache a resolved address for a given hostname.

指定者:

cache 在接口中 DnsCache

参数:

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

返回:

The DnsCacheEntry corresponding to this cache entry.

cache

public DnsCacheEntry cache(java.lang.String hostname,
                           DnsRecord[] additionals,
                           java.lang.Throwable cause,
                           EventLoop loop)

从接口复制的说明: DnsCache

Cache the resolution failure for a given hostname. Be aware this won't be called with timeout / cancel / transport exceptions.

指定者:

cache 在接口中 DnsCache

参数:

hostname - the hostname

additionals - the additional records

cause - the resolution failure

loop - the EventLoop used to register the TTL timeout

返回:

The DnsCacheEntry corresponding to this cache entry, or null if this cache doesn't support caching failed responses.

toString

public java.lang.String toString()

覆盖:

toString 在类中 java.lang.Object