Re: [ldap-sdk-discuss] [RFE] Adding DNS resolver class based on JNDI DNS

[Neil A. W. <nei...@un...>]

On 05/18/2014 04:08 AM, Neil A. Wilson wrote:
> On 05/17/2014 06:44 AM, Alon Bar-Lev wrote:
>> Hi,
>>
>> Have you reviewed this request? Adding Resolver interface class to
>> perform hostname->InetAddress resolution before calling the socket
>> factory is important to enable full control over the address selection
>> as required for most of the server sets. You have done this partially
>> at the SRVRecord implementation.
>
> This is something I am still considering for addition to the LDAP SDK at
> some point.

I have just committed a change that adds a new RoundRobinDNSServerSet 
class.  This class provides support for a single hostname that resolves 
to multiple IP addresses.  Because this scenario is typically referred 
to as a round-robin DNS configuration, I have named the server set that. 
  However, note that the implementation does not strictly require the 
use of DNS (you can force its use by specifying a JNDI DNS provider URL, 
but you can also rely on the default name service mechanism which may 
look in other places like the /etc/hosts file or NIS).  Also note that 
it does not require round-robin selection of addresses -- there are also 
options available to use a failover selection (in which it consistently 
uses addresses in the order retrieved from the server) or a randomized 
order.


Neil