Class DnsQueryIdSpace

java.lang.Object
io.netty.resolver.dns.DnsQueryIdSpace

final class DnsQueryIdSpace extends Object
Special data-structure that will allow to retrieve the next query id to use, while still guarantee some sort of randomness. The query id will be between 0 (inclusive) and 65535 (inclusive) as defined by the RFC.
  • Field Details

  • Constructor Details

    • DnsQueryIdSpace

      DnsQueryIdSpace()
  • Method Details

    • newBucket

      private static DnsQueryIdSpace.DnsQueryIdRange newBucket(int idBucketsIdx)
    • nextId

      int nextId()
      Returns the next ID to use for a query or -1 if there is none left to use.
      Returns:
      next id to use.
    • pushId

      void pushId(int id)
      Push back the id, so it can be used again for the next query.
      Parameters:
      id - the id.
    • usableIds

      int usableIds()
      Return how much more usable ids are left.
      Returns:
      the number of ids that are left for usage.
    • maxUsableIds

      int maxUsableIds()
      Return the maximum number of ids that are supported.
      Returns:
      the maximum number of ids.