/// <summary>
/// Find all UDDI sites registered in Active Directory and log warnings for any invalid sites.
/// </summary>
/// <returns>A collection of invalid site locations from Active Directory.</returns>
private static IEnumerable <UddiSiteLocation> FindAndCacheRegisteredUddiSites()
{
// The flag indicating whether a UDDI site location was successfully cached.
Func <string, UddiSiteLocation, bool> isCached = // Determine if the site location was cached:
(keyValue, site) =>
!string.IsNullOrWhiteSpace(site.InquireUrl) &&
Uri.IsWellFormedUriString(site.InquireUrl, UriKind.RelativeOrAbsolute) &&
(Contains(keyValue) || Add(keyValue, site, new CacheItemPolicy()));
// The unique key value to be used in the cache.
Func <UddiSiteLocation, string> key = site => // Get the unique cache key value:
// If the inquiry URL is well-formed and absolute
Uri.IsWellFormedUriString(site.InquireUrl, UriKind.Absolute)
? // then use it as the key:
site.InquireUrl
: // else generate a new key as a GUID.
Guid.NewGuid().ToString();
// Clear the cache of all previously discovered sites.
// ReSharper disable once ReturnValueOfPureMethodIsNotUsed
Cache.Where(item => item.Key != "DefaultUDDIInquiryService").Select(item => Cache.Remove(item.Key)).ToList();
// Find and cache sites, returning a collection any invalid sites.
// NB. The Find method doesn't throw errors. Any exception is silently consumed in the Microsoft.Uddi library.
// When an error occurs, it is possible for the returned collection to be partially populated with discovered sites.
// There is no way of telling if Find is broken.
return
(from site in UddiSiteDiscovery.Find(UddiSiteUrlType.Inquire, AuthenticationMode.WindowsAuthentication)
where isCached(key(site), site) == false
select site);
}
/// <summary>
/// Searches Active Directory for Uddi Sites, using the specified Authentication
/// Mode as criteria for the search.
/// </summary>
/// <param name="mode"> The authentication mode you would like to query for.</param>
/// <returns>The first UddiSiteLocation registered with Active Directory.</returns>
private static UddiSiteLocation GetFirstLocation(AuthenticationMode mode)
{
UddiSiteLocation[] locations = UddiSiteDiscovery.Find(UddiSiteUrlType.All, mode);
if (locations.Length > 0)
{
return(locations[0]);
}
else
{
return(null);
}
}