I have been working for weeks on creating a client/server to
control a music-server application located on
the server-side that is controlled by several
client apps located across
the LAN. I've been successful in getting
the client-side to communicate with
the Server, sending commands to operate
the music-server, and through
the use of callbacks, reply to
the clients so that all of
the client UI's can be appropriately updated. My problem is however, that I unable to figure-out how to broadcast other messages that need to be sent from
the server app to
the clients. I was hoping to utilize
the callback method; however I have not been able to access it from
the server
side. Do I need to modify or create another contract that provides for communication from
the server to
the clients?
Does the binding require modification? As I mentioned earlier, I have truly been working on this for weeks (which is beginning to feel like 'years'), and hope to get this last piece of
the application working. Would someone please steer me in
the right direction?
Client Side SERVICE REFERENCE:
<?xml version="1.0" encoding="utf-8"?>
<ServiceReference>
<ProxyGenerationParameters
ServiceReferenceUri="http://localhost:8001/APService/mex"
Name="APGateway"
NotifyPropertyChange="True"
UseObservableCollection="False">
</ProxyGenerationParameters>
<EndPoints>
<EndPoint
Address="net.tcp://localhost:8000/APService/service"
BindingConfiguration="TcpBinding"
Contract="APClient.APGateway.APUserService"
>
</EndPoint>
<EndPoint
Address="http://localhost:8001/APService/service"
BindingConfiguration="HttpBinding"
Contract="APClient.APGateway.APUserService"
>
</EndPoint>
</EndPoints>
</ServiceReference>
Client Side AP CONFIG
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
<section name="APClient.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</sectionGroup>
</configSections>
<system.serviceModel>
<client>
<endpoint
address="net.tcp://localhost:8000/APService/service"
binding="netTcpBinding"
contract="APClient.APGateway.APUserService"
name="TcpBinding" />
<endpoint
address="http://localhost:8001/APService/service"
binding="wsDualHttpBinding"
contract="APClient.APGateway.APUserService"
name="HttpBinding" />
</client>
</system.serviceModel>
<applicationSettings>
<APClient.Properties.Settings>
<setting name="pathToDatabase" serializeAs="String">
<value>C:\Users\Bill\Documents\APData\</value>
</setting>
</APClient.Properties.Settings>
</applicationSettings>
Server
Side AP.CONFIG
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="MetadataBehavior">
<serviceMetadata httpGetEnabled="true" httpGetUrl="http://localhost:8001/APService/mex" />
</behavior>
</serviceBehaviors>
</behaviors>
<services>
<service behaviorConfiguration="MetadataBehavior" name="APService.APService">
<endpoint address="service" binding="netTcpBinding" name="TcpBinding"
contract="APService.IAPServiceInventory" />
<endpoint address="service" binding="wsDualHttpBinding" name="HttpBinding"
contract="APService.IAPServiceInventory" />
<endpoint address="mex" binding="mexHttpBinding" name="MexBinding"
contract="IMetadataExchange" />
<host>
<baseAddresses>
<add baseAddress="net.tcp://localhost:8000/APService/" />
<add baseAddress="http://localhost:8001/APService/" />
</baseAddresses>
</host>
</service>
</services>
</system.serviceModel>
</configuration>
Server
Side APSERVICE.CS
namespace APService
{
[ServiceBehavior(ConcurrencyMode=ConcurrencyMode.Single,InstanceContextMode=InstanceContextMode.PerCall)]
public class APService : IAPServiceInventory
{
private static List<IClientCallback> _callbackList = new List<IClientCallback>();
private static int _beerInventory = Convert.ToInt32(System.Configuration.ConfigurationManager.AppSettings["InitialBeerInventory"]);
public APService() {}
public int SubscribeToServer(string guestName)
{
IClientCallback guest = OperationContext.Current.GetCallbackChannel<IClientCallback>();
if(!_callbackList.Contains(guest)) { _callbackList.Add(guest); }
else { Console.WriteLine(guest + " is already logged onto
the Server."); }
_callbackList.ForEach(delegate(IClientCallback callback) { callback.NotifyGuestJoinedParty(guestName); });
}
public void UpdateClients(string guestName,string UpdateInfo)
{
_callbackList.ForEach(delegate(IClientCallback callback) { callback.NotifyUpdateClients(guestName,UpdateInfo); });
}
public void SendRequestToServer(string guestName, string request)
{
_callbackList.ForEach(delegate(IClientCallback callback) { callback.NotifyRequestMadeToServer(guestName,request); });
if(request == "Play") { APControl.Play(); }
else if(request == "Stop") { APControl.Stop(); }
else if(request == "Pause") { APControl.PlayPause(); }
else if(request == "Next Track") { APControl.NextTrack(); }
else if(request == "Previous Track") { APControl.PreviousTrack(); }
else if(request == "Mute") { APControl.Mute(); }
else if(request == "Volume Up") { APControl.VolumeUp(5); }
else if(request == "Volume Down") { APControl.VolumeDown(5); }
}
public void CancelServerSubscription(string guestName)
{
IClientCallback guest = OperationContext.Current.GetCallbackChannel<IClientCallback>();
if(_callbackList.Contains(guest)) { _callbackList.Remove(guest); }
_callbackList.ForEach(delegate(IClientCallback callback) { callback.NotifyGuestLeftParty(guestName); });
}
}
Server
Side IAPSERVICE.CS
namespace APService
{
[ServiceContract(Name="APUserService",Namespace="http://AP.com/WCFClientServer/",SessionMode=SessionMode.Required, CallbackContract=typeof(IClientCallback))]
public interface IAPServiceInventory
{
[OperationContract()]
int SubscribeToServer(string guestName);
[OperationContract(IsOneWay=true)]
void SendRequestToServer(string guestName,string request);
[OperationContract(IsOneWay=true)]
void UpdateClients(string guestName,string UpdateInfo);
[OperationContract(IsOneWay=true)]
void CancelServerSubscription(string guestName);
}
}
Server
side - IAPServiceCallback.cs
namespace APService
{
public interface IClientCallback
{
[OperationContract(IsOneWay=true)]
void NotifyGuestJoinedParty(string guestName);
[OperationContract(IsOneWay=true)]
void NotifyUpdateClients(string guestName,string UpdateInfo);
[OperationContract(IsOneWay=true)]
void NotifyRequestMadeToServer(string guestName,string request);
[OperationContract(IsOneWay=true)]
void NotifyGuestLeftParty(string guestName);
}
