/// <summary>
/// Returns the receiver associated with the specified uri.
/// </summary>
/// <param name="mbrUri">The uri associated with the receiver.</param>
/// <returns>The receiver associated with the specified uri.</returns>
public ReceiverInfo GetReceiverInfo(string mbrUri)
{
using (ReaderAutoLocker reader = new ReaderAutoLocker(this._readerWriterLock))
{
return(this._receivers[mbrUri] as ReceiverInfo);
}
}
/// <summary>
/// Returns the filtered array of the ReceiverInfo instances.
/// </summary>
/// <param name="arrayOfReceiverInfo">The list of receivers being filtered out.</param>
/// <param name="iMessage">The invocation.</param>
/// <param name="resultCollector">The Result Collector obtaining the list of receivers. Is used for debugging purposes only.</param>
public void GetListOfReceivers(out object[] arrayOfReceiverInfo, IMessage iMessage, ResultCollector resultCollector)
{
arrayOfReceiverInfo = null;
try
{
using (ReaderAutoLocker reader = new ReaderAutoLocker(this._readerWriterLock))
{
// check whether they were cached
if (this._cachedReceiversInfoArray == null)
{
this._cachedReceiversInfoArray = new object[this._receivers.Values.Count];
this._receivers.Values.CopyTo(this._cachedReceiversInfoArray, 0);
}
// get the cached array
arrayOfReceiverInfo = this._cachedReceiversInfoArray;
// and drive it thru the filter
IMulticastFilter iMulticastFilter = Dispatcher.GetCurrentFilter();
if (iMulticastFilter == null)
{
iMulticastFilter = this.IMulticastFilter;
}
if (iMulticastFilter != null)
{
// LOG:
BinaryLogWriter binaryLogWriter = GenuineLoggingServices.BinaryLogWriter;
if (binaryLogWriter != null && binaryLogWriter[LogCategory.BroadcastEngine] > 0)
{
binaryLogWriter.WriteBroadcastEngineEvent(LogCategory.BroadcastEngine, "Dispatcher.GetListOfReceivers",
LogMessageType.BroadcastFilterCalled, null, null, null, null,
GenuineUtility.CurrentThreadId, Thread.CurrentThread.Name,
null, null, false, this, resultCollector, false, null,
iMulticastFilter.GetType().ToString(), null,
"The broadcast filter is called. The type of the filter: {0}.", iMulticastFilter.GetType().ToString());
}
arrayOfReceiverInfo = iMulticastFilter.GetReceivers(arrayOfReceiverInfo, iMessage);
}
}
}
catch (Exception ex)
{
// LOG:
BinaryLogWriter binaryLogWriter = GenuineLoggingServices.BinaryLogWriter;
if (binaryLogWriter != null && binaryLogWriter[LogCategory.BroadcastEngine] > 0)
{
binaryLogWriter.WriteBroadcastEngineEvent(LogCategory.BroadcastEngine, "Dispatcher.GetListOfReceivers",
LogMessageType.BroadcastFilterCalled, ex, null, null, null,
GenuineUtility.CurrentThreadId, Thread.CurrentThread.Name,
null, null, false, this, resultCollector, false, null,
null, null,
"The exception occurred while calling the broadcast filter.");
}
}
}
/// <summary>
/// Returns the receiver associated with the specified uri.
/// </summary>
/// <param name="uri">The uri associated with the receiver.</param>
/// <returns>The receiver associated with the specified uri.</returns>
public MarshalByRefObject FindObjectByUri(string uri)
{
using (ReaderAutoLocker reader = new ReaderAutoLocker(this._readerWriterLock))
{
ReceiverInfo receiverInfo = this._receivers[uri] as ReceiverInfo;
if (receiverInfo == null)
{
return(null);
}
return(receiverInfo.MbrObject);
}
}
/// <summary>
/// Broadcasts message to all registered receivers.
/// </summary>
/// <param name="msg">The message to be broadcasted.</param>
/// <returns></returns>
public override IMessage Invoke(IMessage msg)
{
ResultCollector resultCollector = null;
// broadcasting
using (ReaderAutoLocker reader = new ReaderAutoLocker(this._dispatcher._readerWriterLock))
{
resultCollector = new ResultCollector(this._dispatcher, this._dispatcher._receivers.Count + 3, msg);
}
resultCollector.PerformBroadcasting(msg);
return(new ReturnMessage(resultCollector, null, 0, (LogicalCallContext)msg.Properties["__CallContext"], (IMethodCallMessage)msg));
}
/// <summary>
/// Looks for a failed broadcast receivers and invoke them again.
/// </summary>
public void SendMessageToFailedReceiversDirectly()
{
if (this._secondStagePerformed)
{
return;
}
this._secondStagePerformed = true;
BinaryLogWriter binaryLogWriter = GenuineLoggingServices.BinaryLogWriter;
// the second stage of the broadcasting
using (ReaderAutoLocker reader = new ReaderAutoLocker(this._dispatcher._readerWriterLock))
{
// to prevent firing resultCollector.AllMessagesReceived event
this.UnrepliedReceivers[_uniqueReceiverName] = null;
lock (this)
{
foreach (DictionaryEntry entry in this.Failed)
{
OperationException operationException = entry.Value as OperationException;
if (operationException != null && operationException.OperationErrorMessage != null &&
operationException.OperationErrorMessage.ErrorIdentifier == "GenuineChannels.Exception.Broadcast.RemoteEndPointDidNotReplyForTimeOut")
{
string uri = (string)entry.Key;
ReceiverInfo receiverInfo = this._dispatcher.GetReceiverInfo(uri);
// whether this receiver is expected to receive message via broadcast channel
if (receiverInfo == null || receiverInfo.NeedsBroadcastSimulation)
{
continue;
}
// switch it back to simulation mode if the limit is exceeded
lock (receiverInfo)
{
receiverInfo.NumberOfMulticastFails++;
if (this._dispatcher.MaximumNumberOfConsecutiveFailsToEnableSimulationMode != 0 &&
receiverInfo.NumberOfMulticastFails >= this._dispatcher.MaximumNumberOfConsecutiveFailsToEnableSimulationMode)
{
// force simulation
receiverInfo.NeedsBroadcastSimulation = true;
receiverInfo.NumberOfMulticastFails = 0;
}
}
// each time a new stream is created because sinks change stream position concurrently
Stream messageToBeSent = (Stream)this._messageStream.Clone();
TransportHeaders transportHeaders = new TransportHeaders();
// LOG:
if (binaryLogWriter != null && binaryLogWriter[LogCategory.BroadcastEngine] > 0)
{
string methodName = BinaryLogWriter.ParseInvocationMethod(this._iMessage.Properties["__MethodName"] as string, this._iMessage.Properties["__TypeName"] as string);
string invocationTarget = receiverInfo.MbrUri;
binaryLogWriter.WriteBroadcastEngineEvent(LogCategory.BroadcastEngine, "ResultCollector.SendMessageToFailedReceiversDirectly",
LogMessageType.BroadcastRecipientInvokedAfterTimeout, null, null, receiverInfo.DbgRemoteHost, null,
GenuineUtility.CurrentThreadId, Thread.CurrentThread.Name,
null, null, false, this._dispatcher, this, false, receiverInfo,
invocationTarget, methodName,
"The broadcast invocation is being directed to the recipient, which did not respond during the first stage.");
}
// set destination MBR
this._iMessage.Properties["__Uri"] = receiverInfo.MbrUri;
transportHeaders[Message.TransportHeadersBroadcastObjRefOrCourt] = receiverInfo.SerializedObjRef;
ClientChannelSinkStack clientChannelSinkStack = new ClientChannelSinkStack(this);
clientChannelSinkStack.Push(this, null);
receiverInfo.IClientChannelSink.AsyncProcessRequest(clientChannelSinkStack, this._iMessage, transportHeaders, messageToBeSent);
}
}
}
this.UnrepliedReceivers.Remove(_uniqueReceiverName);
if (this.UnrepliedReceivers.Count <= 0)
{
this.AllMessagesReceived.Set();
}
}
}
/// <summary>
/// Registers the receiver and associate the provided object with it.
/// Returns false if the receiver has already been registered.
/// WARNING: does not check whether the receiver supports the required interface (via Reflection)
/// because this check requires client's dll.
/// </summary>
/// <param name="obj">The receiver being registered.</param>
/// <param name="tag">The object associated with the receiver. This object is accessible when receiver is being unregistered or during filtering.</param>
/// <param name="remoteGenuineUri">The uri of the remote host provided by any of Genuine Channels.</param>
/// <param name="transportContext">The transport context of the remote host.</param>
/// <returns>False if the receiver has been already registered.</returns>
public bool Add(MarshalByRefObject obj, object tag, string remoteGenuineUri, ITransportContext transportContext)
{
if (obj == null)
{
throw new ArgumentNullException("obj");
}
BinaryLogWriter binaryLogWriter = GenuineLoggingServices.BinaryLogWriter;
// check if it is in the list
string uri = RemotingServices.GetObjectUri(obj);
if (uri == null && !RemotingServices.IsObjectOutOfAppDomain(obj))
{
// it was not marshalled
RemotingServices.Marshal(obj);
uri = RemotingServices.GetObjectUri(obj);
}
using (ReaderAutoLocker reader = new ReaderAutoLocker(this._readerWriterLock))
{
if (this._receivers.ContainsKey(uri))
{
return(false);
}
}
// this check can not be performed because client's dll is required
// // check on the interface
// bool supportInterface = false;
// foreach(Type interfaceType in obj.GetType().GetInterfaces())
// if (interfaceType == this._interfaceToSupport)
// {
// supportInterface = true;
// break;
// }
// if (! supportInterface)
// throw GenuineExceptions.Get_Broadcast_ObjectDoesNotSupportDestinationInterface();
// adds the object to the receiver list
ReceiverInfo receiverInfo = new ReceiverInfo();
receiverInfo.MbrObject = obj;
receiverInfo.MbrUri = uri;
receiverInfo.Tag = tag;
if (binaryLogWriter != null)
{
try
{
if (receiverInfo.MbrObject != null)
{
receiverInfo.DbgRemoteHost = GenuineUtility.FetchHostInformationFromMbr(receiverInfo.MbrObject);
}
}
catch (Exception ex)
{
binaryLogWriter.WriteImplementationWarningEvent("Dispatcher.Add",
LogMessageType.Error, ex, GenuineUtility.CurrentThreadId, Thread.CurrentThread.Name,
"Can't get HostInformation from MbrObject.");
}
}
ObjRef objRef = receiverInfo.MbrObject.CreateObjRef(typeof(MarshalByRefObject));
receiverInfo.Local = objRef.IsFromThisAppDomain();
// cache object's info to speed up sending thru Genuine Channels
if (!receiverInfo.Local)
{
if (remoteGenuineUri != null)
{
receiverInfo.IClientChannelSink = new GenuineTcpClientTransportSink(remoteGenuineUri, transportContext);
}
else
{
// check whether the client sink has registered itself on this MBR
receiverInfo.IClientChannelSink = ChannelServices.GetChannelSinkProperties(obj)["GC_TS"] as IClientChannelSink;
if (receiverInfo.IClientChannelSink == null)
{
throw GenuineExceptions.Get_Broadcast_ClientSinkIsUnknown();
}
}
// object uri
receiverInfo.SerializedObjRef = objRef;
// // and shell's uri
// string shellUri;
// ITransportContext iTransportContext;
// GenuineUtility.FetchChannelUriFromMbr(obj, out shellUri, out iTransportContext);
// if (shellUri == null)
// throw GenuineExceptions.Get_Send_NoSender(objRef.URI);
//
// receiverInfo.ReceiverUri = shellUri;
}
// LOG:
if (binaryLogWriter != null && binaryLogWriter[LogCategory.BroadcastEngine] > 0)
{
binaryLogWriter.WriteBroadcastEngineEvent(LogCategory.BroadcastEngine, "Dispatcher.Add",
LogMessageType.BroadcastRecipientAdded, null, null, receiverInfo.DbgRemoteHost, null,
GenuineUtility.CurrentThreadId, Thread.CurrentThread.Name,
null, null, false, this, null, true, receiverInfo,
null, null,
"The broadcast recipient is added.");
}
// register the sponsor to prevent unexpected reclaiming
ILease lease = (ILease)RemotingServices.GetLifetimeService(obj);
if (lease != null)
{
lease.Register(this.GlobalSponsor);
}
// and register it
using (WriterAutoLocker writer = new WriterAutoLocker(this._readerWriterLock))
{
this._cachedReceiversInfoArray = null;
this._receivers[uri] = receiverInfo;
}
return(true);
}