/// <summary>
/// Creates an empty group.
/// </summary>
/// <param name="server">The server that the group belongs to.</param>
/// <param name="callbacksRequired">if set to <c>true</c> if the group will received callbacks.</param>
public ComDaGroup(ComDaClient server, bool callbacksRequired)
{
m_server = server;
m_clientHandle = Utils.IncrementIdentifier(ref m_groupCounter);
m_serverHandle = 0;
m_items = new List<GroupItem>();
if (callbacksRequired)
{
m_monitoredItems = new Dictionary<int, DataChangeInfo>();
}
// Utils.Trace("GROUP {0}", m_clientHandle);
}
/// <summary>
/// Applies any changes to the groups.
/// </summary>
public void ApplyGroupChanges(ComDaClient client)
{
List<ComDaGroup> groups = null;
List<SubscribeItemRequest> items = null;
lock (m_lock)
{
items = new List<SubscribeItemRequest>(m_subscribedItems.Values);
// modify or remove items.
for (int ii = 0; ii < items.Count; ii++)
{
SubscribeItemRequest request = items[ii];
// remove unused requests.
if (request.MonitoredItems.Count == 0)
{
if (request.Group != null && request.GroupItem != null)
{
request.Group.RemoveItem(request.GroupItem);
}
Remove(request);
continue;
}
}
// add any new items to groups.
for (int ii = 0; ii < items.Count; ii++)
{
SubscribeItemRequest request = items[ii];
if (!request.Changed)
{
continue;
}
UpdateGroup(client, request);
}
groups = new List<ComDaGroup>(m_groups.Count);
// update group on the server.
for (int ii = 0; ii < m_groups.Count; ii++)
{
if (m_groups[ii].ApplyChanges())
{
groups.Add(m_groups[ii]);
}
else
{
m_groups[ii].Delete();
}
}
m_groups = groups;
// update request.
for (int ii = 0; ii < items.Count; ii++)
{
if (items[ii].Changed)
{
items[ii].ChangesComplete();
}
}
// modify or remove items.
List<SubscribePropertyRequest> properties = new List<SubscribePropertyRequest>(m_subscribedProperties.Values);
for (int ii = 0; ii < properties.Count; ii++)
{
SubscribePropertyRequest request = properties[ii];
// remove unused requests.
if (request.MonitoredItems == null || request.MonitoredItems.Count == 0)
{
Remove(request);
continue;
}
request.ChangesComplete(m_propertySamplingInterval);
}
// check if the property scanner needs to be stopped/started.
if (m_propertyScanTimer == null)
{
if (m_subscribedProperties.Count > 0)
{
m_propertyScanTimer = new Timer(OnScanProperties, null, 0, m_propertySamplingInterval);
}
}
else
{
if (m_subscribedProperties.Count == 0)
{
m_propertyScanTimer.Dispose();
m_propertyScanTimer = null;
}
}
}
}
/// <summary>
/// Creates a new instance of the client with the same configuration.
/// </summary>
/// <returns>The copy of the client.</returns>
public ComDaClient CloneClient()
{
ComDaClient clone = new ComDaClient(m_configuration);
clone.LocaleId = this.LocaleId;
clone.UserIdentity = this.UserIdentity;
clone.Key = this.Key;
return clone;
}
/// <summary>
/// Assigns a request to a group.
/// </summary>
/// <param name="client">The client.</param>
/// <param name="request">The request.</param>
public void UpdateGroup(ComDaClient client, SubscribeItemRequest request)
{
lock (m_lock)
{
// check for empty request.
if (request.MonitoredItems.Count == 0)
{
return;
}
request.Update();
// check if existing group can be used.
if (request.Group != null)
{
if (request.Group.ModifyItem(request.GroupItem, request.SamplingInterval, request.Deadband, request.Active))
{
if (request.GroupItem.Active != request.Active)
{
request.GroupItem.Active = request.Active;
request.GroupItem.ActiveChanged = true;
}
request.Group.SetMonitoredItems(request.GroupItem, request.MonitoredItems.ToArray());
return;
}
}
// clear link to existing group.
request.Group = null;
request.GroupItem = null;
// assign to an existing group.
for (int ii = 0; ii < m_groups.Count; ii++)
{
ComDaGroup group = m_groups[ii];
request.GroupItem = group.CreateItem(request.ItemId, request.SamplingInterval, request.Deadband, request.Active);
if (request.GroupItem != null)
{
request.Group = group;
request.Group.SetMonitoredItems(request.GroupItem, request.MonitoredItems.ToArray());
return;
}
}
// create a new group.
request.Group = new ComDaGroup(client, true);
request.GroupItem = request.Group.CreateItem(request.ItemId, request.SamplingInterval, request.Deadband, request.Active);
request.Group.SetMonitoredItems(request.GroupItem, request.MonitoredItems.ToArray());
m_groups.Add(request.Group);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="Da20ElementBrowser"/> class.
/// </summary>
/// <param name="client">The client.</param>
/// <param name="itemId">The item id.</param>
/// <param name="browseToNotSupported">if set to <c>true</c> BROWSE_TO not supported.</param>
public Da20ElementBrowser(
ComDaClient client,
string itemId,
bool browseToNotSupported)
{
m_client = client;
m_itemId = itemId;
m_branches = false;
m_browseToNotSupported = browseToNotSupported;
}
