protected override IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
return new CompletedAsyncResult<EndpointDiscoveryMetadata>(
this.Match(resolveCriteria),
callback,
state);
}
internal static ResolveCriteria ReadXml (XmlReader reader, DiscoveryVersion version)
{
if (reader == null)
throw new ArgumentNullException ("reader");
var ret = new ResolveCriteria ();
reader.MoveToContent ();
if (!reader.IsStartElement ("ResolveType", version.Namespace) || reader.IsEmptyElement)
throw new XmlException ("Non-empty ResolveType element is expected");
reader.ReadStartElement ("ResolveType", version.Namespace);
// standard members
reader.MoveToContent ();
ret.Address = EndpointAddress.ReadFrom (version.MessageVersion.Addressing, reader);
// non-standard members
for (reader.MoveToContent (); !reader.EOF && reader.NodeType != XmlNodeType.EndElement; reader.MoveToContent ()) {
if (reader.NamespaceURI == SerializationNS) {
switch (reader.LocalName) {
case "Duration":
ret.Duration = (TimeSpan) reader.ReadElementContentAs (typeof (TimeSpan), null);
break;
}
}
else
ret.Extensions.Add (XElement.Load (reader));
}
reader.ReadEndElement ();
return ret;
}
protected override IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
return(new CompletedAsyncResult <EndpointDiscoveryMetadata>(
this.Match(resolveCriteria),
callback,
state));
}
protected ResolveRequestResponseAsyncResult(
TResolveMessage resolveMessage,
IDiscoveryServiceImplementation discoveryServiceImpl,
AsyncCallback callback,
object state)
: base(callback, state)
{
Fx.Assert(resolveMessage != null, "The resolveMessage must be non null.");
Fx.Assert(discoveryServiceImpl != null, "The discoveryServiceImpl must be non null.");
this.discoveryServiceImpl = discoveryServiceImpl;
if (!this.Validate(resolveMessage))
{
this.Complete(true);
return;
}
else
{
this.context = new DiscoveryOperationContext(OperationContext.Current);
this.resolveCriteria = this.GetResolveCriteria(resolveMessage);
if (this.ProcessResolveRequest())
{
this.Complete(true);
return;
}
}
}
protected ResolveDuplexAsyncResult(TResolveMessage resolveMessage,
IDiscoveryServiceImplementation discoveryServiceImpl,
IMulticastSuppressionImplementation multicastSuppressionImpl,
AsyncCallback callback,
object state)
: base(callback, state)
{
Fx.Assert(resolveMessage != null, "The resolveMessage must be non null.");
Fx.Assert(discoveryServiceImpl != null, "The discoveryServiceImpl must be non null.");
this.discoveryServiceImpl = discoveryServiceImpl;
this.multicastSuppressionImpl = multicastSuppressionImpl;
if (!this.Validate(resolveMessage))
{
this.Complete(true);
return;
}
else
{
this.context = new DiscoveryOperationContext(OperationContext.Current);
this.resolveCriteria = this.GetResolveCriteria(resolveMessage);
this.timeoutHelper = new TimeoutHelper(this.resolveCriteria.Duration);
this.timeoutHelper.RemainingTime();
this.Process();
}
}
protected override IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
Console.WriteLine("Received a Resolve request message. Forwarding the Resolve message.");
// ResolveAsyncResult will forward the Resolve request
return new ResolveAsyncResult(resolveCriteria, this.forwardingDiscoveryEndpoint, callback, state);
}
//Resolve
protected override IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
EndpointDiscoveryMetadata endpoint = null;
if (this.Endpoints.ContainsKey(resolveCriteria.Address))
{
endpoint = this.Endpoints[resolveCriteria.Address];
}
return new DiscoveryAsyncResult(callback, endpoint);
}
public virtual EndpointDiscoveryMetadata ResolveEndpoint(ResolveCriteria resolveCriteria)
{
foreach (var metadata in endpoints.Values)
{
if (resolveCriteria.Address == metadata.Address)
{
return metadata;
}
}
return null;
}
public virtual EndpointDiscoveryMetadata ResolveService(ResolveCriteria resolveCriteria)
{
foreach (EndpointDiscoveryMetadata metadata in services.Values)
{
if (resolveCriteria.Address == metadata.Address)
{
return metadata;
}
}
return null;
}
public EndpointDiscoveryMetadata Match(ResolveCriteria criteria)
{
EndpointDiscoveryMetadata matchingEndpoint = null;
_logger.Log("Matching " + criteria, LogLevel.Debug);
foreach (var onlineService in _onlineServices.Values.Where(x => criteria.Address == x.Metadata.Address))
{
_logger.Log("...found " + criteria.Address, LogLevel.Debug);
matchingEndpoint = onlineService.Metadata;
}
return matchingEndpoint;
}
public ResolveAsyncResult(ResolveCriteria resolveCriteria, DiscoveryEndpoint forwardingDiscoveryEndpoint, AsyncCallback callback, object state)
: base(callback, state)
{
this.resolveCriteria = resolveCriteria;
this.discoveryClient = new DiscoveryClient(forwardingDiscoveryEndpoint);
this.discoveryClient.ResolveCompleted += new EventHandler<ResolveCompletedEventArgs>(ResolveCompleted);
// Forwards the Resolve request message
this.discoveryClient.ResolveAsync(resolveCriteria);
}
EndpointDiscoveryMetadata Match(ResolveCriteria criteria)
{
for (int i = 0; i < this.publishedEndpoints.Count; i++)
{
if (this.publishedEndpoints[i].Address.Equals(criteria.Address))
{
return(this.publishedEndpoints[i]);
}
}
return(null);
}
EndpointDiscoveryMetadata Match(ResolveCriteria criteria)
{
for (int i = 0; i < this.publishedEndpoints.Count; i++)
{
if (this.publishedEndpoints[i].Address.Equals(criteria.Address))
{
return this.publishedEndpoints[i];
}
}
return null;
}
public EndpointDiscoveryMetadata MatchFromOnlineService(ResolveCriteria criteria)
{
EndpointDiscoveryMetadata matchingEndpoint = null;
lock (_onlineServices)
{
foreach (var endpointDiscoveryMetadata in _onlineServices.Values)
{
if (criteria.Address == endpointDiscoveryMetadata.Address)
{
matchingEndpoint = endpointDiscoveryMetadata;
}
}
}
return matchingEndpoint;
}
protected override IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
EndpointDiscoveryMetadata matchingEndpoint = null;
foreach (EndpointDiscoveryMetadata endpointDiscoveryMetadata in this.publishedEndpoints)
{
if (resolveCriteria.Address == endpointDiscoveryMetadata.Address)
{
matchingEndpoint = endpointDiscoveryMetadata;
break;
}
}
return new ResolveAsyncResult(matchingEndpoint, callback, state);
}
public void ResolveAsync(ResolveCriteria criteria, object userState)
{
AsyncCallback cb = delegate(IAsyncResult result) {
ResolveResponse ret = null;
Exception error = null;
try {
ret = EndResolve(result);
} catch (Exception ex) {
error = ex;
}
OnResolveCompleted(new ResolveCompletedEventArgs(ret, error, cancelled, result.AsyncState));
};
cancelled = false;
BeginResolve(criteria, cb, userState);
}
internal static ResolveCriteria ReadXml(XmlReader reader, DiscoveryVersion version)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
var ret = new ResolveCriteria();
reader.MoveToContent();
if (!reader.IsStartElement("ResolveType", version.Namespace) || reader.IsEmptyElement)
{
throw new XmlException("Non-empty ResolveType element is expected");
}
reader.ReadStartElement("ResolveType", version.Namespace);
// standard members
reader.MoveToContent();
ret.Address = EndpointAddress.ReadFrom(version.MessageVersion.Addressing, reader);
// non-standard members
for (reader.MoveToContent(); !reader.EOF && reader.NodeType != XmlNodeType.EndElement; reader.MoveToContent())
{
if (reader.NamespaceURI == SerializationNS)
{
switch (reader.LocalName)
{
case "Duration":
ret.Duration = (TimeSpan)reader.ReadElementContentAs(typeof(TimeSpan), null);
break;
}
}
else
{
ret.Extensions.Add(XElement.Load(reader));
}
}
reader.ReadEndElement();
return(ret);
}
protected override IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
// FIXME: this is a workaround for (similar to) bug #633945.
switch (Environment.OSVersion.Platform)
{
case PlatformID.Unix:
case PlatformID.MacOSX:
if (resolve_delegate == null)
{
resolve_delegate = new Func <ResolveCriteria, EndpointDiscoveryMetadata> (Resolve);
}
return(resolve_delegate.BeginInvoke(resolveCriteria, callback, state));
default:
var ret = Resolve(resolveCriteria);
var result = new TempAsyncResult(ret, state);
if (callback != null)
{
callback(result);
}
return(result);
}
}
protected override IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
return response;
}
protected abstract IAsyncResult OnBeginResolve (ResolveCriteria resolveCriteria, AsyncCallback callback, Object state);
protected override IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, Object state)
{
Console.Error.WriteLine("OnBeginResolve");
throw new Exception("2");
}
//-----------------------------------------------------
// Redirect Adhoc to Managed Resolve
//-----------------------------------------------------
#region ShouldRedirectResolve
//
// Summary:
// Override this method to allow the discovery proxy to send out multicast suppression
// messages when it receives a multicast resolve request.
//
// Parameters:
// findCriteria:
// The find criteria that describes the service to find.
//
// callback:
// The callback delegate to call when the operation is completed.
//
// state:
// The user-defined state data.
//
// Returns:
// A reference to the pending asynchronous operation.
protected override IAsyncResult BeginShouldRedirectResolve(ResolveCriteria findCriteria, AsyncCallback callback, object state)
{
return(_resolveTaskFactory.Create(findCriteria).ToApm(callback, state));
}
EndpointDiscoveryMetadata Resolve (ResolveCriteria criteria)
{
throw new NotImplementedException ();
}
// resolve
public ResolveResponse Resolve(ResolveCriteria criteria)
{
return(EndResolve(BeginResolve(criteria, null, null)));
}
IAsyncResult IMulticastSuppressionImplementation.BeginShouldRedirectResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
return this.BeginShouldRedirectResolve(resolveCriteria, callback, state);
}
protected virtual IAsyncResult BeginShouldRedirectResolve(ResolveCriteria findCriteria, AsyncCallback callback, object state)
{
return new CompletedAsyncResult<bool>(false, callback, state);
}
IAsyncResult IDiscoveryServiceImplementation.BeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
return this.OnBeginResolve(resolveCriteria, callback, state);
}
protected virtual IAsyncResult BeginShouldRedirectResolve(ResolveCriteria findCriteria, AsyncCallback callback, Object state)
{
throw new NotImplementedException();
}
/// <summary>
/// Begins an asynchronous resolve operation with the specified criteria.
/// </summary>
/// <param name="discoveryClient">The discovery client.</param>
/// <param name="criteria">The criteria for matching a service endpoint.</param>
/// <returns>A Task that represents the asynchronous operation.</returns>
public static Task<ResolveResponse> ResolveTaskAsync(
this DiscoveryClient discoveryClient, ResolveCriteria criteria)
{
// Validate arguments
if (discoveryClient == null) throw new ArgumentNullException("discoveryClient");
// Create a TaskCompletionSource to represent the operation
var tcs = new TaskCompletionSource<ResolveResponse>(discoveryClient);
// Register a handler that will transfer completion results to the TCS Task
EventHandler<ResolveCompletedEventArgs> completedHandler = null;
completedHandler = (sender, e) => TaskServices.HandleEapCompletion(tcs, true, e, () => e.Result, () => discoveryClient.ResolveCompleted -= completedHandler);
discoveryClient.ResolveCompleted += completedHandler;
// Start the async operation.
try { discoveryClient.ResolveAsync(criteria, tcs); }
catch
{
discoveryClient.ResolveCompleted -= completedHandler;
throw;
}
// Return the task to represent the asynchronous operation
return tcs.Task;
}
protected virtual IAsyncResult BeginShouldRedirectResolve(ResolveCriteria findCriteria, AsyncCallback callback, object state)
{
return(new CompletedAsyncResult <bool>(false, callback, state));
}
IAsyncResult IMulticastSuppressionImplementation.BeginShouldRedirectResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
return(this.BeginShouldRedirectResolve(resolveCriteria, callback, state));
}
protected virtual IAsyncResult BeginShouldRedirectResolve (ResolveCriteria findCriteria, AsyncCallback callback, Object state)
{
throw new NotImplementedException ();
}
IAsyncResult BeginResolve(ResolveCriteria criteria, AsyncCallback callback, object state)
{
return(((IDiscoveryCommon)client).BeginResolve(criteria, callback, state));
}
// OnBeginFind method is called when a Resolve request message is received by the Proxy
protected override IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback,
object state)
{
_logger.Log("OnBeginResolve()", LogLevel.Debug);
return new OnResolveAsyncResult(_provider.Match(resolveCriteria), callback, state);
}
public void ResolveAsync (ResolveCriteria criteria)
{
throw new NotImplementedException ();
}
protected override IAsyncResult OnBeginResolve (ResolveCriteria resolveCriteria, AsyncCallback callback, Object state)
{
if (resolve_delegate == null)
resolve_delegate = new Func<ResolveCriteria,EndpointDiscoveryMetadata> (Resolve);
return resolve_delegate.BeginInvoke (resolveCriteria, callback, state);
}
protected override IAsyncResult OnBeginResolve (ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
// FIXME: this is a workaround for (similar to) bug #633945.
switch (Environment.OSVersion.Platform) {
case PlatformID.Unix:
case PlatformID.MacOSX:
if (resolve_delegate == null)
resolve_delegate = new Func<ResolveCriteria,EndpointDiscoveryMetadata> (Resolve);
return resolve_delegate.BeginInvoke (resolveCriteria, callback, state);
default:
var ret = Resolve (resolveCriteria);
var result = new TempAsyncResult (ret, state);
if (callback != null)
callback (result);
return result;
}
}
//-----------------------------------------------------
// Resolve
//-----------------------------------------------------
#region Resolve
/// <summary>
/// Handles a resolve operation.
/// </summary>
/// <param name="resolveCriteria">The resolve criteria that describes the service to discover.</param>
/// <param name="callback">The callback delegate to call when the operation is completed.</param>
/// <param name="state">The user-defined state data.</param>
/// <returns>A reference to the pending asynchronous operation.</returns>
protected override IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
return(_resolveTaskFactory.Create(resolveCriteria).ToApm(callback, state));
}
/// <summary>
/// Return a random EndpointDiscoveryMetadata out of the endpoints that match a criteria.
/// The endpoint is chosen in random for load balancing
/// </summary>
/// <param name="criteria"></param>
/// <returns></returns>
EndpointDiscoveryMetadata MatchFromOnlineService(ResolveCriteria criteria)
{
EndpointDiscoveryMetadata matchingEndpoint = null;
Random rnd = new Random();
lock (this.onlineServices)
{
List<EndpointDiscoveryMetadata> eplist = new List<EndpointDiscoveryMetadata>();
foreach (EndpointDiscoveryMetadata endpointDiscoveryMetadata in this.onlineServices.Values)
{
if (criteria.Address == endpointDiscoveryMetadata.Address)
{
eplist.Add(endpointDiscoveryMetadata);
}
}
//make sure the endpoints distribute randomaly
int index = rnd.Next(eplist.Count);
matchingEndpoint = eplist.ToArray()[index];
}
return matchingEndpoint;
}
protected override IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
return new SynchronousResult(callback, state, implementation.ResolveEndpoint(resolveCriteria));
}
public void ResolveAsync(ResolveCriteria criteria)
{
ResolveAsync(criteria, null);
}
public virtual EndpointDiscoveryMetadata ResolveEndpoint(ResolveCriteria resolveCriteria)
{
using (@lock.ForReading())
{
EndpointDiscoveryMetadata endpoint;
return endpoints.TryGetValue(resolveCriteria.Address, out endpoint)
? endpoint
: null;
}
}
EndpointDiscoveryMetadata Resolve(ResolveCriteria criteria)
{
throw new NotImplementedException();
}
protected override IAsyncResult OnBeginResolve (ResolveCriteria resolveCriteria, AsyncCallback callback, Object state)
{
Console.Error.WriteLine ("OnBeginResolve");
throw new Exception ("2");
}
protected abstract IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, Object state);
public void ResolveAsync (ResolveCriteria criteria, object userState)
{
throw new NotImplementedException ();
}
IAsyncResult IDiscoveryServiceImplementation.BeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
return(this.OnBeginResolve(resolveCriteria, callback, state));
}
// OnBeginFind method is called when a Resolve request message is received by the Proxy
protected override IAsyncResult OnBeginResolve(ResolveCriteria resolveCriteria, AsyncCallback callback, object state)
{
return new OnResolveAsyncResult(this.MatchFromOnlineService(resolveCriteria), callback, state);
}
public ResolveResponse Resolve (ResolveCriteria criteria)
{
throw new NotImplementedException ();
}
