Class NetworkAddress


public class NetworkAddress
extends Object
A convenient wrapper class around network primitives in Java. How IPv6 is handled: If a hostname is passed in as input instead of a literal IP address, then the class relies on InetAddress.getAllByName(String) to perform a lookup. By default the JVM prefers IPv4 for this lookup in dual stack environments, unless the system property "" is set to true on startup. In this case, IPv6 is preferred and automatically selected. Note that there is one specific case where if IPv6 is preferred in dual stack and you are running Couchbase Server pre 5.1 which does not support IPv6, then you must set the system property "com.couchbase.forceIPv4" to true so that the firstly returned IPv6 address is ignored and we are looking for an IPv4 address to be resolved as well. Obviously, in a single IPv6 stack environment working with older Couchbase Server releases won't work.
Michael Nitschinger
  • Field Details


      public static final String REVERSE_DNS_PROPERTY
      See Also:
      Constant Field Values

      public static final String FORCE_IPV4_PROPERTY
      See Also:
      Constant Field Values

      public static final boolean ALLOW_REVERSE_DNS
      Flag which controls the usage of reverse dns
    • FORCE_IPV4

      public static final boolean FORCE_IPV4
      Flag which controls if even if ipv6 is present, IPv4 should be preferred.
  • Method Details

    • create

      public static NetworkAddress create​(String input)
      Creates a new NetworkAddress from either a hostname or ip address literal.
    • localhost

      public static NetworkAddress localhost()
      Creates a new NetworkAddress for loopback.
    • hostname

      public String hostname()
      Returns the hostname for this network address.
      the hostname.
    • address

      public String address()
      Returns the string IP representation for this network address.
      the IP address in string representation
    • nameOrAddress

      public String nameOrAddress()
      Returns the hostname if available and if not returns the address.
      hostname or address, best effort.
    • nameAndAddress

      public String nameAndAddress()
      Prints a safe representation of the hostname (if available) and the IP address.
      hostname and ip as a string
    • toString

      public String toString()
      toString in class Object
    • equals

      public boolean equals​(Object o)
      equals in class Object
    • hashCode

      public int hashCode()
      hashCode in class Object