Class Cache<E>

java.lang.Object
io.netty.resolver.dns.Cache<E>
Type Parameters:
E -
abstract class Cache<E> extends java.lang.Object
Abstract cache that automatically removes entries for a hostname once the TTL for an entry is reached.

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    private final class 
    Cache.Entries
     

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private static final java.util.concurrent.ScheduledFuture<?>
    CANCELLED
     
    private static final java.util.concurrent.atomic.AtomicReferenceFieldUpdater<Cache.Entries, java.util.concurrent.ScheduledFuture>
    FUTURE_UPDATER
     
    (package private) static final int
    MAX_SUPPORTED_TTL_SECS
     
    private final java.util.concurrent.ConcurrentMap<java.lang.String, Cache<E>.Entries>
    resolveCache
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    Cache()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    (package private) final void
    cache(java.lang.String hostname, E value, int ttl, EventLoop loop)
    Cache a value for the given hostname that will automatically expire once the TTL is reached.
    (package private) final void
    clear()
    Remove everything from the cache.
    (package private) final boolean
    clear(java.lang.String hostname)
    Clear all entries (if anything exists) for the given hostname and return true if anything was removed.
    protected abstract boolean
    equals(E entry, E otherEntry)
    Returns true if both entries are equal.
    (package private) final java.util.List<? extends E>
    get(java.lang.String hostname)
    Returns all caches entries for the given hostname.
    protected abstract boolean
    shouldReplaceAll(E entry)
    Returns true if this entry should replace all other entries that are already cached for the hostname.
    (package private) final int
    size()
    Return the number of hostnames for which we have cached something.
    protected void
    sortEntries(java.lang.String hostname, java.util.List<E> entries)
    Sort the List for a hostname before caching these.

    Methods inherited from class java.lang.Object

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

  • Field Details

    • FUTURE_UPDATER

      private static final java.util.concurrent.atomic.AtomicReferenceFieldUpdater<Cache.Entries, java.util.concurrent.ScheduledFuture> FUTURE_UPDATER

    • CANCELLED

      private static final java.util.concurrent.ScheduledFuture<?> CANCELLED

    • MAX_SUPPORTED_TTL_SECS

      static final int MAX_SUPPORTED_TTL_SECS

    • resolveCache

      private final java.util.concurrent.ConcurrentMap<java.lang.String, Cache<E>.Entries> resolveCache

  • Constructor Details

    • Cache

      Cache()

  • Method Details

    • clear

      final void clear()
      Remove everything from the cache.

    • clear

      final boolean clear(java.lang.String hostname)
      Clear all entries (if anything exists) for the given hostname and return true if anything was removed.

    • get

      final java.util.List<? extends E> get(java.lang.String hostname)
      Returns all caches entries for the given hostname.

    • cache

      final void cache(java.lang.String hostname, E value, int ttl, EventLoop loop)
      Cache a value for the given hostname that will automatically expire once the TTL is reached.

    • size

      final int size()
      Return the number of hostnames for which we have cached something.

    • shouldReplaceAll

      protected abstract boolean shouldReplaceAll(E entry)
      Returns true if this entry should replace all other entries that are already cached for the hostname.

    • sortEntries

      protected void sortEntries(java.lang.String hostname, java.util.List<E> entries)
      Sort the List for a hostname before caching these.

    • equals

      protected abstract boolean equals(E entry, E otherEntry)
      Returns true if both entries are equal.