//public bool IsConnectedToOPCDAServer { get { if (oPCDAServer == null) return false; else return oPCDAServer.IsConnected; } }
#endregion
public OPCClassicBrowserEngine()
{
this.OPCGroupSizeLimit = OPCBackEnd.Config.OPCClassic_SubscriptionGroupSizeLimit.ToInt(40);
_OPCWrapper = new OpcCom.ServerEnumerator();
_BrowseFilters = new Opc.Da.BrowseFilters()
{
ReturnAllProperties = true,
ReturnPropertyValues = true,
BrowseFilter = Opc.Da.browseFilter.all,
MaxElementsReturned = 0
};
//Check for Tag Inactivity every 5s. Every call by client will update it's activity.
//If tag has been inactive for more than 3x it's update interval, remove the tag from subscription (5s min inactivity time)
OPTimer CheckInactivityTimer = new OPTimer("OPC Classic Browser Engine Check Inactivity Timer", 5000);
CheckInactivityTimer.Elapsed += (s) =>
{
List <RegisteredTag> InactiveTags = this.RegisteredTags.Values.Where(RT =>
{
if (RT.UpdateIntervalInMS <= 5000)
{
return((DateTime.Now - RT.LastCalled).TotalMilliseconds > 5000);
}
else
{
return((DateTime.Now - RT.LastCalled).TotalMilliseconds > 3 * RT.UpdateIntervalInMS);
}
}).ToList();
foreach (RegisteredTag InactiveTag in InactiveTags)
{
foreach (Opc.Da.Server OPCServer in _OPCDAServers)
{
if (!OPCServer.IsConnected)
{
continue;
}
Subscription SubscriptionWhereInactiveTagIs = OPCServer.Subscriptions.FindSubcriptionThatHasItem(InactiveTag.Id, out Item InactiveItem);
if (SubscriptionWhereInactiveTagIs != null)
{
SubscriptionWhereInactiveTagIs.RemoveItems(new ItemIdentifier[] { InactiveItem });
}
}
this.RegisteredTags.Remove(InactiveTag.Id);
}
return(Task.CompletedTask);
};
CheckInactivityTimer.Start();
}
public OPCUABrowserEngine(string SSLCertificateDirectory = null)
{
this.OPCGroupSizeLimit = OPCBackEnd.Config.OPCCUA_SubscriptionGroupSizeLimit.ToInt(40);
#region GENERATE APPLICATION CONFIGURATION
_OPCWrapper = new OpcCom.ServerEnumerator();
if (SSLCertificateDirectory == null)
{
_SSLCertificateDirectory = Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData) + "\\Vlix\\VlixOPC\\Certs";
}
else
{
_SSLCertificateDirectory = SSLCertificateDirectory;
}
_Config = new ApplicationConfiguration()
{
ApplicationName = "VlixOPCUABrowser",
ApplicationType = ApplicationType.Client,
SecurityConfiguration = new SecurityConfiguration
{
//This is the App's certificate that should exist it the 'Own' directory
ApplicationCertificate = new CertificateIdentifier
{
StoreType = @"Directory",
StorePath = _SSLCertificateDirectory + "\\Own",
SubjectName = Utils.Format(@"CN={0}, DC={1}", "VlixOPCUABrowser", System.Net.Dns.GetHostName())
},
TrustedPeerCertificates = new CertificateTrustList {
StoreType = @"Directory", StorePath = _SSLCertificateDirectory + "\\Trusted",
},
TrustedIssuerCertificates = new CertificateTrustList {
StoreType = @"Directory", StorePath = _SSLCertificateDirectory + "\\Issuers",
},
RejectedCertificateStore = new CertificateTrustList {
StoreType = @"Directory", StorePath = _SSLCertificateDirectory + "\\Rejected",
},
NonceLength = 32,
AutoAcceptUntrustedCertificates = true
},
TransportConfigurations = new TransportConfigurationCollection(),
TransportQuotas = new TransportQuotas {
OperationTimeout = 15000
},
ClientConfiguration = new ClientConfiguration {
DefaultSessionTimeout = 60000
},
DisableHiResClock = true
};
_Config.Validate(ApplicationType.Client); //This only checks if any certificates exists (in the predefined area). If no certificates exist, nothing will happen.
#endregion
OPTimer CheckInactivityTimer = new OPTimer("OPCUABrowserEngine Check Inactivity Timer", 5000);
CheckInactivityTimer.Elapsed += (s) =>
{
List <RegisteredTag> InactiveTags = this.RegisteredTags.Values.Where(RT =>
{
if (RT.UpdateIntervalInMS <= 5000)
{
return((DateTime.Now - RT.LastCalled).TotalMilliseconds > 5000);
}
else
{
return((DateTime.Now - RT.LastCalled).TotalMilliseconds > 3 * RT.UpdateIntervalInMS);
}
}).ToList();
foreach (RegisteredTag InactiveTag in InactiveTags)
{
foreach (OPCUAServer OPCServer in _OPCUAServers)
{
if (OPCServer.Session == null || !OPCServer.Session.Connected)
{
continue;
}
//ILocalNode NodeIdObject = OPCServer.Session.NodeCache.Find(new NodeId(InactiveTag.Id)) as ILocalNode;
Subscription SubscriptionWhereInactiveTagIs = OPCServer.Session.Subscriptions.FindSubcriptionThatHasItem(InactiveTag.Id, out MonitoredItem InactiveItem);
if (SubscriptionWhereInactiveTagIs != null)
{
SubscriptionWhereInactiveTagIs.RemoveItem(InactiveItem);
}
}
this.RegisteredTags.Remove(InactiveTag.Id);
}
};
CheckInactivityTimer.Start();
}
