/// <summary>
/// Looks for devices that host a service identified by its type and namespace.
/// It returns the transport address of the first matching service.
/// </summary>
public static string FindFirst(DpwsDiscoveryClient discoveryClient, string serviceTypeName, string namespaceUri)
{
if (discoveryClient == null)
throw new ArgumentNullException();
if (serviceTypeName == null)
throw new ArgumentNullException();
if (namespaceUri == null)
throw new ArgumentNullException();
Debug.Print("Discovering service devices...");
// Define search criterias
DpwsServiceType serviceType = new DpwsServiceType(serviceTypeName, namespaceUri);
DpwsServiceTypes filters = new DpwsServiceTypes();
filters.Add(serviceType);
// Probe for devices
DpwsServiceDescriptions probeMatches = discoveryClient.Probe(filters);
if (probeMatches != null && probeMatches.Count > 0)
{
// Remember transport address of the first device
string deviceTransportAddress = probeMatches[0].XAddrs[0];
// Request metadata to get the desired service and its ID
DpwsMexClient mexClient = new DpwsMexClient();
DpwsMetadata metadata = mexClient.Get(deviceTransportAddress);
// Check host service
DpwsMexService host = metadata.Relationship.Host;
if (host != null) // has host service
{
if (host.ServiceTypes[serviceTypeName] != null)
return host.EndpointRefs[0].Address.AbsoluteUri;
}
// Check hosted services
DpwsMexServices hostedServices = metadata.Relationship.HostedServices;
if (hostedServices != null)
{
for (int i = 0; i < hostedServices.Count; ++i)
{
DpwsMexService hostedService = hostedServices[i];
if (hostedService.ServiceTypes[serviceTypeName] != null)
return hostedService.EndpointRefs[0].Address.AbsoluteUri;
}
}
}
Debug.Print("No service found.");
return null;
}
/// <summary>
/// Creates an instance of a DpwsClient class with a specified eventing callback port number.
/// </summary>
public DpwsClient(Binding localBinding, ProtocolVersion v)
{
m_threadLock = new object();
m_eventClient = new DpwsEventingClient(v);
m_mexClient = new DpwsMexClient(v);
m_eventCallbacks = new WsServiceOperations();
m_callbackServiceEndpoints = new WsServiceEndpoints();
m_blockingCall = true;
m_ignoreRequestFromThisIP = true;
m_localBinding = localBinding;
m_version = v;
m_discoClient = new DpwsDiscoveryClient(this, v);
// Add the Hello and Bye discovery disco services
ClientDiscoveryService = new DpwsDiscoClientService(this, v);
// Start a Udp discovery service host
WsUdpServiceHost.Instance.AddServiceEndpoint(ClientDiscoveryService);
WsUdpServiceHost.Instance.IgnoreRequestFromThisIP = m_ignoreRequestFromThisIP;
WsUdpServiceHost.Instance.MaxThreadCount = 5;
WsUdpServiceHost.Instance.Start(new ServerBindingContext(v));
}
/// <summary>
/// Creates an instance of a DpwsClient class with a specified eventing callback port number.
/// </summary>
public DpwsClient(Binding localBinding, ProtocolVersion v)
{
m_threadLock = new object();
m_eventClient = new DpwsEventingClient(v);
m_mexClient = new DpwsMexClient(v);
m_eventCallbacks = new WsServiceOperations();
m_callbackServiceEndpoints = new WsServiceEndpoints();
m_blockingCall = true;
m_ignoreRequestFromThisIP = true;
m_localBinding = localBinding;
m_version = v;
m_discoClient = new DpwsDiscoveryClient(this, v);
// Add the Hello and Bye discovery disco services
ClientDiscoveryService = new DpwsDiscoClientService(this, v);
// Start a Udp discovery service host
WsUdpServiceHost.Instance.AddServiceEndpoint(ClientDiscoveryService);
WsUdpServiceHost.Instance.IgnoreRequestFromThisIP = m_ignoreRequestFromThisIP;
WsUdpServiceHost.Instance.MaxThreadCount = 5;
WsUdpServiceHost.Instance.Start(new ServerBindingContext(v));
// Add eventing SubscriptionEnd ServiceOperations. By default Subscription End call back
// to this client
ServiceOperations.Add(new WsServiceOperation(WsWellKnownUri.WseNamespaceUri, "SubscriptionEnd"));
// Add callbacks implemented by this client
m_callbackServiceEndpoints.Add(this);
// Start the Http service host
m_httpServiceHost = new WsHttpServiceHost(m_localBinding, m_callbackServiceEndpoints);
m_httpServiceHost.MaxThreadCount = m_callbackServiceEndpoints.Count;
m_httpServiceHost.Start(new ServerBindingContext(v));
System.Ext.Console.Write("Http service host started...");
}
/// <summary>
/// Stop tranport services and releases the managed resources used by this class.
/// </summary>
/// <param name="disposing">True to release managed resources</param>
internal void Dispose(bool disposing)
{
if (disposing)
{
// Stop the transport services
m_httpServiceHost.Stop();
m_udpSeviceHost.Stop();
m_threadLock = null;
m_discoClient = null;
m_endpointAddress = null;
m_eventClient = null;
m_mexClient = null;
m_eventCallbacks = null;
m_transportAddress = null;
m_bodyParts = null;
m_discoServiceEndpoints = null;
m_callbackServiceEndpoints = null;
m_udpSeviceHost = null;
m_httpServiceHost = null;
}
}
private void Init()
{
m_discoClient = new DpwsDiscoveryClient(this);
// Set the initial endpoint address
m_endpointAddress = "urn:uuid:" + Guid.NewGuid();
// Add the Hello and Bye discovery disco services
ClientDiscoveryService = new DpwsDiscoClientService(this);
m_discoServiceEndpoints.Add(ClientDiscoveryService);
// Start a Udp discovery service host
m_udpSeviceHost = new WsUdpServiceHost(m_discoServiceEndpoints);
if (!m_udpSeviceHost.IsRunning)
{
m_udpSeviceHost.IgnoreRequestFromThisIP = m_ignoreRequestFromThisIP;
m_udpSeviceHost.MaxThreadCount = 5;
m_udpSeviceHost.Start();
System.Ext.Console.Write("Udp service host started...");
}
else
m_udpSeviceHost = null;
// Add eventing SubscriptionEnd ServiceOperations. By default Subscription End call back
// to this client
ServiceOperations.Add(new WsServiceOperation(WsWellKnownUri.WseNamespaceUri, "SubscriptionEnd"));
// Add callbacks implemented by this client
m_callbackServiceEndpoints.Add(this);
// Start the Http service host
m_httpServiceHost = new WsHttpServiceHost(m_port, m_callbackServiceEndpoints);
m_httpServiceHost.MaxThreadCount = m_callbackServiceEndpoints.Count;
m_httpServiceHost.Start();
System.Ext.Console.Write("Http service host started...");
}