/// <summary>
/// This will be invoked by the COM server when it has finished
/// processing the message.
/// </summary>
public void VirusScanCompleted()
{
Debug.WriteLine("[AntivirusAgent] Callback from the COM service");
// Restores the state for the thread.
this.agentAsyncContext.Resume();
// Release the COM server resources.
this.virusScanner = null;
// This allows Exchange to continue processing the message.
this.agentAsyncContext.Complete();
}
/// <summary>
/// Invoked by Exchange when a message has been submitted.
/// </summary>
/// <param name="source">The source of this event.</param>
/// <param name="args">Arguments for this event.</param>
void SubmittedMessageHandler(SubmittedMessageEventSource source, QueuedMessageEventArgs args)
{
Debug.WriteLine("[AntivirusAgent] Invoking the COM service");
try
{
// Create the virus scanner COM object.
Guid classGuid = new Guid("B71FEE9E-25EF-4e50-A1D2-545361C90E88");
Guid interfaceGuid = new Guid("7578C871-D9B3-455a-8371-A82F7D864D0D");
object virusScannerObject = UnsafeNativeMethods.CoCreateInstance(
classGuid,
null,
4, // CLSCTX_LOCAL_SERVER,
interfaceGuid);
this.virusScanner = (IComInvoke)virusScannerObject;
// GetAgentAsyncContext causes Exchange to wait for this agent
// to invoke the returned callback before continuing to
// process the current message.
this.agentAsyncContext = this.GetAgentAsyncContext();
this.mailItem = args.MailItem;
// Invoke the virus scanner.
this.virusScanner.BeginVirusScan((IComCallback)this);
}
catch (System.Runtime.InteropServices.COMException ex)
{
Debug.WriteLine("[AntivirusAgent] " + ex.ToString());
if (this.agentAsyncContext != null)
{
this.agentAsyncContext.Complete();
}
}
return;
}
