/// <summary>
/// Updates the type cache.
/// </summary>
private void DoMetadataUpdate(object state)
{
try
{
if (!Server.IsRunning)
{
return;
}
ComAeClientManager system = (ComAeClientManager)SystemContext.SystemHandle;
ComAeClient client = (ComAeClient)system.SelectClient(SystemContext, true);
AeTypeCache cache = new AeTypeCache();
cache.LoadEventTypes(client);
lock (Lock)
{
if (m_typeCache == null)
{
m_typeCache = cache;
}
m_typeCache.EventTypes = cache.EventTypes;
m_typeCache.UpdateCache(SystemContext, NamespaceIndex);
}
}
catch (Exception e)
{
Utils.Trace(e, "Unexpected error updating event type cache.");
}
}
/// <summary>
/// Initializes the next stage of browsing.
/// </summary>
private void NextStage()
{
ComAeClientManager system = (ComAeClientManager)this.SystemContext.SystemHandle;
ComAeClient client = system.SelectClient((ServerSystemContext)SystemContext, false);
// determine which stage is next based on the reference types requested.
for (Stage next = m_stage + 1; next <= Stage.Done; next++)
{
if (next == Stage.Children)
{
if (IsRequired(ReferenceTypeIds.HasNotifier, false))
{
m_stage = next;
break;
}
}
else if (next == Stage.Parents)
{
if (IsRequired(ReferenceTypeIds.HasNotifier, true))
{
m_stage = next;
break;
}
}
else if (next == Stage.Done)
{
m_stage = next;
break;
}
}
// start enumerating areas.
if (m_stage == Stage.Children)
{
m_browser = new ComAeBrowserClient(client, m_qualifiedName);
return;
}
// start enumerating parents.
if (m_stage == Stage.Parents)
{
return;
}
// all done.
}
/// <summary>
/// Called when the alarm is acknowledged.
/// </summary>
private ServiceResult OnAcknowledge(
ISystemContext context,
MethodState method,
NodeId objectId,
byte[] eventId,
LocalizedText comment)
{
ComAeClientManager system = (ComAeClientManager)this.SystemContext.SystemHandle;
ComAeClient client = (ComAeClient)system.SelectClient((ServerSystemContext)context, false);
try
{
return(client.Acknowledge((ServerSystemContext)context, eventId, comment));
}
catch (Exception e)
{
return(ServiceResult.Create(e, StatusCodes.BadUnexpectedError, "Could not acknowledge event."));
}
}
/// <summary>
/// Initializes the node manager.
/// </summary>
public ComAeClientNodeManager(IServerInternal server, string namespaceUri, ComAeClientConfiguration configuration, bool ownsTypeModel)
:
base(server, namespaceUri, ownsTypeModel)
{
SystemContext.SystemHandle = m_system = new ComAeClientManager();
SystemContext.NodeIdFactory = this;
// save the configuration for the node manager.
m_configuration = configuration;
// set the alias root.
AliasRoot = m_configuration.ServerName;
if (String.IsNullOrEmpty(AliasRoot))
{
AliasRoot = "AE";
}
m_subscriptions = new Dictionary <SubscriptionIndex, ComAeSubscriptionClient>();
m_monitoredItems = new Dictionary <uint, ComAeSubscriptionClient>();
}
/// <summary>
/// Initializes the node manager.
/// </summary>
public ComAeClientNodeManager(IServerInternal server, string namespaceUri, ComAeClientConfiguration configuration, bool ownsTypeModel)
:
base(server, namespaceUri, ownsTypeModel)
{
SystemContext.SystemHandle = m_system = new ComAeClientManager();
SystemContext.NodeIdFactory = this;
// save the configuration for the node manager.
m_configuration = configuration;
// set the alias root.
AliasRoot = m_configuration.ServerName;
if (String.IsNullOrEmpty(AliasRoot))
{
AliasRoot = "AE";
}
m_subscriptions = new Dictionary<SubscriptionIndex,ComAeSubscriptionClient>();
m_monitoredItems = new Dictionary<uint,ComAeSubscriptionClient>();
}
/// <summary>
/// Initializes a new instance of the <see cref="ComAeSubscriptionClient"/> class.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="configuration">The configuration.</param>
/// <param name="cache">The cache for known types.</param>
/// <param name="namespaceIndex">The namespace index for the event types.</param>
/// <param name="manager">The manager.</param>
/// <param name="monitoredItem">The monitored item.</param>
public ComAeSubscriptionClient(
ServerSystemContext context,
ComAeClientConfiguration configuration,
AeTypeCache cache,
ushort namespaceIndex,
ComAeClientManager manager,
MonitoredItem monitoredItem)
{
m_defaultContext = context;
m_separators = configuration.SeperatorChars;
m_cache = cache;
m_namespaceIndex = namespaceIndex;
m_manager = manager;
m_refreshComplete = new ManualResetEvent(false);
m_monitoredItems = new List <MonitoredItem>();
m_monitoredItems.Add(monitoredItem);
m_qualifiedName = null;
m_isSource = false;
NodeHandle handle = monitoredItem.ManagerHandle as NodeHandle;
AeAreaState area = handle.Node as AeAreaState;
if (area != null)
{
m_qualifiedName = area.QualifiedName;
m_isSource = false;
}
else
{
AeSourceState source = handle.Node as AeSourceState;
if (source != null)
{
m_qualifiedName = source.QualifiedName;
m_isSource = true;
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ComAeSubscriptionClient"/> class.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="configuration">The configuration.</param>
/// <param name="cache">The cache for known types.</param>
/// <param name="namespaceIndex">The namespace index for the event types.</param>
/// <param name="manager">The manager.</param>
/// <param name="monitoredItem">The monitored item.</param>
public ComAeSubscriptionClient(
ServerSystemContext context,
ComAeClientConfiguration configuration,
AeTypeCache cache,
ushort namespaceIndex,
ComAeClientManager manager,
MonitoredItem monitoredItem)
{
m_defaultContext = context;
m_separators = configuration.SeperatorChars;
m_cache = cache;
m_namespaceIndex = namespaceIndex;
m_manager = manager;
m_refreshComplete = new ManualResetEvent(false);
m_monitoredItems = new List<MonitoredItem>();
m_monitoredItems.Add(monitoredItem);
m_qualifiedName = null;
m_isSource = false;
NodeHandle handle = monitoredItem.ManagerHandle as NodeHandle;
AeAreaState area = handle.Node as AeAreaState;
if (area != null)
{
m_qualifiedName = area.QualifiedName;
m_isSource = false;
}
else
{
AeSourceState source = handle.Node as AeSourceState;
if (source != null)
{
m_qualifiedName = source.QualifiedName;
m_isSource = true;
}
}
}
/// <summary>
/// Subscribes to events.
/// </summary>
protected override ServiceResult SubscribeToEvents(
ServerSystemContext context,
NodeState source,
IEventMonitoredItem monitoredItem,
bool unsubscribe)
{
ComAeClientManager system = (ComAeClientManager)this.SystemContext.SystemHandle;
ComAeClient client = (ComAeClient)system.SelectClient(context, false);
// need to wait until the cache is refreshed for the first time.
if (!WaitForTypeCache())
{
return(StatusCodes.BadOutOfService);
}
lock (Lock)
{
SubscriptionIndex index = new SubscriptionIndex();
index.NodeId = source.NodeId;
index.LocaleId = client.LocaleId;
if (unsubscribe)
{
ComAeSubscriptionClient subscription = null;
if (!m_monitoredItems.TryGetValue(monitoredItem.Id, out subscription))
{
return(ServiceResult.Good);
}
m_monitoredItems.Remove(monitoredItem.Id);
// Utils.Trace("REMOVED ITEM {0}", monitoredItem.Id);
if (subscription.RemoveItem(monitoredItem as MonitoredItem) == 0)
{
subscription.Delete();
m_subscriptions.Remove(index);
// Utils.Trace("DELETED SUBSCRIPTION {0}", index.NodeId);
}
}
else
{
ComAeSubscriptionClient subscription = null;
if (!m_subscriptions.TryGetValue(index, out subscription))
{
subscription = new ComAeSubscriptionClient(context, m_configuration, m_typeCache, NamespaceIndex, system, monitoredItem as MonitoredItem);
m_subscriptions.Add(index, subscription);
subscription.Create();
// Utils.Trace("ADDED NEW SUBSCRIPTION {0}", index.NodeId);
}
else
{
subscription.AddItem(monitoredItem as MonitoredItem);
}
m_monitoredItems[monitoredItem.Id] = subscription;
// Utils.Trace("ADDED NEW ITEM {0}", monitoredItem.Id);
}
}
// all done.
return(ServiceResult.Good);
}
