/// <summary>
/// Enqueue changes.
/// </summary>
/// <param name="entries">Changes to process.</param>
public void AddToQueue(List <SearchResultEntry> entries)
{
if ((entries != null) && entries.Any())
{
lock (mQueueLock)
{
// Add items to query
Queue.AddRange(entries);
// Sort query by uSNChanged and process users first
Queue.Sort((a, b) =>
{
if (LdapHelper.IsUser(a) ^ LdapHelper.IsUser(b))
{
return(LdapHelper.IsUser(a) ? -1 : 1);
}
return(LdapHelper.GetUsnChanged(a).CompareTo(LdapHelper.GetUsnChanged(b)));
});
// Start sending changes
if (DispatchAllowed && !DispatchRunning)
{
DispatchRunning = true;
Task.Factory.StartNew(SendChanges, TaskCreationOptions.LongRunning);
}
}
}
}
/// <summary>
/// Handle single user.
/// </summary>
/// <param name="entry">User LDAP object.</param>
private void HandleUser(SearchResultEntry entry)
{
// Create CMS object from LDAP object
var user = new User(
LdapHelper.GetObjectGuid(entry),
LdapHelper.GetAttributeString(entry.Attributes["name"], true),
LdapHelper.IsUserEnabled(entry),
UserBindings.Select(k => new KeyValuePair <string, string>(k.Cms, LdapHelper.GetAttributeString(entry.Attributes[k.Ldap]))).ToList());
// Find existing object in LDAP replica
var existing = Replica.Users.FirstOrDefault(u => u.Guid == user.Guid);
if (LdapHelper.IsDeleted(entry))
{
if (existing != null)
{
// Remove user
Sender.RemoveUser(existing);
Replica.Users.Remove(existing);
}
}
else if (existing != null)
{
// Check if any attribute has changed
var userXml = Sender.GetUser(user.Guid);
if (!string.IsNullOrEmpty(userXml))
{
bool userChanged =
User.InternalBindings.Any(
b =>
RestHelper.GetAttributeFromReponse(userXml, b.Value) !=
((b.Key == "userAccountControl" ? LdapHelper.IsUserEnabled(entry).ToString().ToLowerInvariant() : LdapHelper.GetAttributeString(entry.Attributes[b.Key], b.Key == "name")) ?? string.Empty));
userChanged |=
UserBindings.Any(
b =>
RestHelper.GetAttributeFromReponse(userXml, b.Cms) !=
(LdapHelper.GetAttributeString(entry.Attributes[b.Ldap]) ?? string.Empty));
if (userChanged)
{
// Modify user
Sender.ModifyUser(user);
}
}
}
else
{
// Add user
long?userId = Sender.AddUser(user);
if (userId != null)
{
user.Id = userId.Value;
user.DistinguishedName = entry.DistinguishedName;
Replica.Users.Add(user);
}
}
}
/// <summary>
/// Send changes to CMS one-by-one.
/// </summary>
private void SendChanges()
{
// Re-enumerate queue in each iteration
while (Queue.Any() && DispatchAllowed)
{
lock (mQueueLock)
{
try
{
if (Replica == null)
{
LoadDirecotryReplica();
}
// Process first entry
var entry = Queue.First();
if (entry == null)
{
// Remove all nulls
Queue.RemoveAll(e => e == null);
continue;
}
// Handle incoming change
if (LdapHelper.IsUser(entry))
{
HandleUser(entry);
}
else if (LdapHelper.IsGroup(entry))
{
HandleGroup(entry);
}
Queue.Remove(entry);
// Set actual uSNChanged attribute
long newUsn = LdapHelper.GetUsnChanged(entry);
if ((Replica != null) && (Replica.HighestUsnChanged < newUsn))
{
Replica.HighestUsnChanged = newUsn;
}
SaveDirecotryReplica();
}
catch (Exception ex)
{
LogError("Exception occurred when processing object.", ex);
}
}
}
DispatchRunning = false;
}
/// <summary>
/// Handle single role.
/// </summary>
/// <param name="entry">Group LDAP object.</param>
private void HandleGroup(SearchResultEntry entry)
{
// Create CMS object from LDAP object
var role = new Role(LdapHelper.GetObjectGuid(entry),
LdapHelper.GetAttributeString(entry.Attributes["sAMAccountName"], true),
LdapHelper.GetAttributeString(entry.Attributes["displayName"]),
GroupBindings.Select(k => new KeyValuePair <string, string>(k.Cms, LdapHelper.GetAttributeString(entry.Attributes[k.Ldap]))).ToList());
var existing = Replica.Groups.FirstOrDefault(g => g.Guid == role.Guid);
List <User> currentMembers = (existing == null) ? new List <User>() : Replica.Bindings.Where(b => b.RoleId == existing.Id).SelectMany(b => Replica.Users.Where(u => u.Id == b.UserId)).ToList();
List <User> newMembers = LdapHelper.GetGroupMembers(entry).SelectMany(d => Replica.Users.Where(u => string.Equals(u.DistinguishedName, d, StringComparison.InvariantCultureIgnoreCase))).ToList();
if (LdapHelper.IsDeleted(entry))
{
if (existing != null)
{
// Delete role
Sender.RemoveRole(existing);
Replica.Groups.Remove(existing);
}
}
else
{
if (existing != null)
{
role.Id = existing.Id;
// Check if any attribute has changed
var roleXml = Sender.GetRole(role.Id);
if (!string.IsNullOrEmpty(roleXml))
{
bool roleChanged =
Role.InternalBindings.Any(
b =>
RestHelper.GetAttributeFromReponse(roleXml, b.Value) !=
(LdapHelper.GetAttributeString(entry.Attributes[b.Key], b.Key == "sAMAccountName") ?? string.Empty));
roleChanged |=
GroupBindings.Any(
b =>
RestHelper.GetAttributeFromReponse(roleXml, b.Cms) !=
(LdapHelper.GetAttributeString(entry.Attributes[b.Ldap]) ?? string.Empty));
if (roleChanged)
{
// Modify role
Sender.ModifyRole(role);
}
}
}
else
{
// Add role
long?roleId = Sender.AddRole(role);
if (roleId != null)
{
role.Id = roleId.Value;
Replica.Groups.Add(role);
}
}
// Add members
var addedMembers = newMembers.Where(m => currentMembers.All(c => c.Guid != m.Guid)).ToList();
foreach (var member in addedMembers)
{
var userroleId = Sender.AddUserToRole(member.Id, role.Id);
if (userroleId != null)
{
Replica.Bindings.Add(new UserRoleBinding(member.Id, role.Id)
{
Id = userroleId.Value
});
}
}
// Remove members
var removedMembers =
currentMembers.Where(m => newMembers.All(c => c.Guid != m.Guid))
.SelectMany(m => Replica.Bindings.Where(b => (b.RoleId == role.Id) && (b.UserId == m.Id)))
.ToList();
foreach (var member in removedMembers)
{
Sender.RemoveUserFromRole(member.Id);
Replica.Bindings.Remove(member);
}
}
}
/// <summary>
/// Asynchronous callback that processes changes from Active Directory.
/// </summary>
/// <param name="asyncResult">Result of permanens search</param>
private void RunAsyncSearch(IAsyncResult asyncResult)
{
var results = new List <SearchResultEntry>();
// Get changes
if (!asyncResult.IsCompleted)
{
PartialResultsCollection partialResults = null;
try
{
partialResults = Connection.GetPartialResults(asyncResult);
}
catch (Exception e)
{
LogError("Retrieving partial results from Active Directory asynchronous search failed.", e);
}
if (partialResults != null)
{
// Add only users and groups
results.AddRange(partialResults.OfType <SearchResultEntry>().Where(p => LdapHelper.IsUser(p, PersonObjectCategory) || LdapHelper.IsGroup(p, GroupObjectCategory)));
}
}
else
{
LogMessage("The change notification control unexpectedly ended the search.");
mSearches.Remove(asyncResult);
StartIncrementalSynchronization();
}
// Send changes to CMS
Dispatcher.AddToQueue(results);
}
/// <summary>
/// Retrieves current state of LDAP database and reflects it to the CMS.
/// </summary>
public void Synchronize()
{
try
{
var request = new SearchRequest(DefaultNamingContext, "(&(|(objectClass=user)(objectClass=group))(usnchanged>=" + (Dispatcher.HighestUsnChanged + 1) + "))", SearchScope.Subtree, null);
request.Controls.Add(new ShowDeletedControl());
// Page result
var prc = new PageResultRequestControl(5);
request.Controls.Add(prc);
var soc = new SearchOptionsControl(System.DirectoryServices.Protocols.SearchOption.DomainScope);
request.Controls.Add(soc);
while (true)
{
var searchResponse = (SearchResponse)Connection.SendRequest(request);
if (searchResponse != null)
{
// Find the returned page response control
foreach (DirectoryControl control in searchResponse.Controls)
{
if (control is PageResultResponseControl)
{
//update the cookie for next set
prc.Cookie = ((PageResultResponseControl)control).Cookie;
break;
}
}
Dispatcher.AddToQueue(searchResponse.Entries.Cast <SearchResultEntry>().Where(p => LdapHelper.IsUser(p, PersonObjectCategory) || LdapHelper.IsGroup(p, GroupObjectCategory)).ToList());
if (prc.Cookie.Length == 0)
{
break;
}
}
else
{
break;
}
}
}
catch (Exception ex)
{
LogError("Full synchronization failed.", ex);
}
}