/// <summary>
/// Creates an instance of the event source class.
/// </summary>
/// <param name="prefix">The event source namespace prefix.</param>
/// <param name="namespaceURI">The event source namespace Uri.</param>
/// <param name="name">The event source type name.</param>
public DpwsWseEventSource(string prefix, string namespaceURI, string name)
{
m_name = name;
m_prefix = prefix;
m_namespaceURI = namespaceURI[namespaceURI.Length - 1] == '/' ? namespaceURI.Substring(0, namespaceURI.Length - 1) : namespaceURI;
m_Operation = m_namespaceURI + "/" + m_name;
m_eventSinks = new DpwsWseEventSinks();
}
/// <summary>
/// Creates an instance of the event source class.
/// </summary>
/// <param name="prefix">The event source namespace prefix.</param>
/// <param name="namespaceURI">The event source namespace Uri.</param>
/// <param name="name">The event source type name.</param>
public DpwsWseEventSource(string prefix, string namespaceURI, string name)
{
m_name = name;
m_prefix = prefix;
m_namespaceURI = namespaceURI[namespaceURI.Length - 1] == '/' ? namespaceURI.Substring(0, namespaceURI.Length - 1) : namespaceURI;
m_Operation = m_namespaceURI + "/" + m_name;
m_eventSinks = new DpwsWseEventSinks();
}
/// <summary>
/// Use this method to raise an event.
/// </summary>
/// <param name="hostedService">The hosted service that contains the event source.</param>
/// <param name="eventSource">The event source that define the event.</param>
/// <param name="eventMessage">The event message buffer.</param>
/// <remarks>
/// A device developer is responsible for building the event message buffer sent
/// to clients that have an active event subscription with an event source. The subscription manager
/// uses the hosted service parameter to access various properties of the service. The event source
/// parameter is used to access the event sinks collection of the event source. Note: This method
/// requires special provisions in order to properly build event message headers for each event sink.
/// In order to send an event to a listening client the soap.header.To property must be changed for
/// each listening client. In the future custom attribute support will solve this problem. For now
/// however a search and replace mechanism is used to modifiy the header.To property. When a device
/// developer builds the event message buffer they must use the search string WSDNOTIFYTOADDRESS for
/// the To header property.
/// </remarks>
public void FireEvent(DpwsHostedService hostedService, DpwsWseEventSource eventSource, WsMessage msgEvt)
{
// Find the specified event source
if (eventSource == null)
{
throw new ArgumentNullException();
}
DpwsWseEventSinks eventSinks = eventSource.EventSinks;
// if there are event sources display message
int count = eventSinks.Count;
if (count > 0)
{
System.Ext.Console.Write("");
System.Ext.Console.Write("Firing " + eventSource.Name);
System.Ext.Console.Write("");
}
// Loop through event sinks and send the event message
for (int i = count - 1; i >= 0; i--)
{
DpwsWseEventSink eventSink = eventSinks[i];
// Try to send event. If attempt fails delete the subscription/eventSink
try
{
msgEvt.Header = new WsWsaHeader(msgEvt.Header.Action, msgEvt.Header.RelatesTo, eventSink.NotifyTo.Address.AbsoluteUri,
null, null, eventSink.NotifyTo.RefParameters);
SendEvent(msgEvt, eventSink.NotifyTo.Address);
}
catch (Exception e)
{
System.Ext.Console.Write("");
System.Ext.Console.Write("FireEvent failed. Deleting EventSink! NotifyToAddress = " + eventSink.NotifyTo.Address + " Exception: " + e.Message);
System.Ext.Console.Write("");
if (!(e is WebException))
{
try
{
// Send oneway subscription end message
SendSubscriptionEnd(eventSink, "DeliveryFailure", hostedService.ServiceID);
}
catch { }
}
// Remove event sink from event source list
eventSinks.RemoveAt(i);
}
}
}
/// <summary>
/// Use this method to raise an event.
/// </summary>
/// <param name="hostedService">The hosted service that contains the event source.</param>
/// <param name="eventSource">The event source that define the event.</param>
/// <param name="eventMessage">The event message buffer.</param>
/// <remarks>
/// A device developer is responsible for building the event message buffer sent
/// to clients that have an active event subscription with an event source. The subscription manager
/// uses the hosted service parameter to access various properties of the service. The event source
/// parameter is used to access the event sinks collection of the event source. Note: This method
/// requires special provisions in order to properly build event message headers for each event sink.
/// In order to send an event to a listening client the soap.header.To property must be changed for
/// each listening client. In the future custom attribute support will solve this problem. For now
/// however a search and replace mechanism is used to modifiy the header.To property. When a device
/// developer builds the event message buffer they must use the search string WSDNOTIFYTOADDRESS for
/// the To header property.
/// </remarks>
public void FireEvent(DpwsHostedService hostedService, DpwsWseEventSource eventSource, WsWsaHeader eventHeader, String eventMessageBody)
{
// Find the specified event source
if (eventSource == null)
{
throw new ArgumentNullException("FireEvent could not locate specified hosted service");
}
DpwsWseEventSinks eventSinks = eventSource.EventSinks;
// if there are event sources display message
int count = eventSinks.Count;
if (count > 0)
{
System.Ext.Console.Write("");
System.Ext.Console.Write("Firing " + eventSource.Name);
System.Ext.Console.Write("");
}
// Loop through event sinks and send the event message
for (int i = 0; i < count; i++)
{
DpwsWseEventSink eventSink = eventSinks[i];
// Try to send event. If attempt fails delete the subscription/eventSink
try
{
MemoryStream soapStream = new MemoryStream();
XmlWriter xmlWriter = XmlWriter.Create(soapStream);
WsWsaHeader header = new WsWsaHeader(eventHeader.Action, eventHeader.RelatesTo, eventSink.NotifyTo.Address.AbsoluteUri,
null, null, eventSink.NotifyTo.RefParameters);
WsSoapMessageWriter.WriteSoapMessageStart(xmlWriter, WsSoapMessageWriter.Prefixes.Wse, null, header, null);
if (eventMessageBody != null)
{
xmlWriter.WriteRaw(eventMessageBody);
}
WsSoapMessageWriter.WriteSoapMessageEnd(xmlWriter);
xmlWriter.Flush();
xmlWriter.Close();
SendEvent(soapStream.ToArray(), eventSink.NotifyTo.Address.AbsoluteUri);
}
catch (Exception e)
{
System.Ext.Console.Write("");
System.Ext.Console.Write("FireEvent failed. Deleting EventSink! NotifyToAddress = " + eventSink.NotifyTo.Address + " Exception: " + e.Message);
System.Ext.Console.Write("");
// Send oneway subscription end message
try
{
SendSubscriptionEnd(eventSink, "DeliveryFailure", hostedService.ServiceID);
}
catch { }
// Remove event sink from event source list
eventSinks.Remove(eventSink);
}
}
}
