/// <summary>
///
/// </summary>
/// <param name="hostname">Fully qualified host name, i.e. host.domain.com</param>
/// <param name="ipAddress">The IP Address to update to.</param>
public override bool UpdateHostname(string hostname, string ipAddress)
{
if (HasIpAddresssChanged(hostname, ipAddress) == false)
{
return(true); // No change, no need to update
}
if (IsValidIpAddress(ipAddress) == false)
{
logger.Error(string.Format("Invalid IP Address provided: {0}", ipAddress));
return(false);
}
var zones = GetHostedZones();
if (zones == null)
{
return(false);
}
try
{
if (!LastUpdateIpAddresses.ContainsKey(hostname))
{
InitializeLastUpdateIpAddresses(hostname);
}
var lastIpAddress = LastUpdateIpAddresses[hostname];
var deleteRequest = GetChangeResourceRecordSetsRequest(hostname, lastIpAddress, EnumerationUtility.GetStringValue(ChangeActionType.Delete), zones);
var deleteResponse = client.ChangeResourceRecordSets(deleteRequest);
}
//Ignore, if delete fails, its probably because the record didn't already exists
catch (AmazonRoute53Exception ex)
{
logger.Warn(ex);
}
catch (Exception ex)
{
logger.Error(ex);
}
try
{
var createRequest = GetChangeResourceRecordSetsRequest(hostname, ipAddress, EnumerationUtility.GetStringValue(ChangeActionType.Create), zones);
var createResponse = client.ChangeResourceRecordSets(createRequest);
//ChangeInfo info: http://docs.amazonwebservices.com/sdkfornet/latest/apidocs/?topic=html/T_Amazon_Route53_Model_ChangeInfo.htm
//response.ChangeResourceRecordSetsResult.ChangeInfo.Status
LastUpdateIpAddresses[hostname] = ipAddress;
return(true);
}
catch (Exception ex)
{
logger.Error(ex);
return(false);
}
}
/// <summary>
/// Checks if the given IP Address has changed from the last update.
/// </summary>
/// <param name="hostname">The hostname that we are checking for an update.</param>
/// <param name="ipAddress">The current IP Address.</param>
/// <returns>True, if the ip address has changed, otherwise false.</returns>
public bool HasIpAddresssChanged(string hostname, string ipAddress)
{
if (LastUpdateIpAddresses.ContainsKey(hostname) && LastUpdateIpAddresses[hostname] == ipAddress)
{
logger.Info(string.Format("No need to update hostname {0}, the IP Address ({1}) hasn't changed.", hostname, ipAddress));
return(false);
}
return(true);
}