/// <summary>
/// This method searches for a primary or alternate contract of the
/// service that is present in the contracts list. Requires a
/// taskQueue to activate tasks on. Throws NoContractFoundException
/// in a Fault if one cannot be found.
/// </summary>
/// <param name="taskQueue"></param>
/// <param name="service"></param>
/// <param name="contracts"></param>
/// <returns></returns>
public static PortSet <ServiceInfoType, Fault> FindCompatibleContract(DispatcherQueue taskQueue, Uri service, List <string> contracts)
{
PortSet <ServiceInfoType, Fault> returnPort = new PortSet <ServiceInfoType, Fault>();
PortSet <LookupResponse, Fault> responsePort = new PortSet <LookupResponse, Fault>();
//Console.WriteLine("RSUtils: Querying " + service);
DssEnvironment.ServiceForwarderUnknownType(service).PostUnknownType(
new DsspDefaultLookup()
{
Body = new LookupRequestType(), ResponsePort = responsePort
});
Arbiter.Activate(taskQueue, Arbiter.Choice <LookupResponse, Fault>(
responsePort,
delegate(LookupResponse resp)
{
try
{
//Console.WriteLine("RSUtils: Got response");
returnPort.Post(FindCompatibleContract(resp, contracts));
}
catch (NoContractFoundException e)
{
returnPort.Post(FaultOfException(e));
}
},
delegate(Fault failure)
{
returnPort.Post(failure);
}));
return(returnPort);
}
private T tryCreateAdapter()
{
lock (this)
{
try
{
// Query the service initially
PortSet <LookupResponse, Fault> responsePort = new PortSet <LookupResponse, Fault>();
DssEnvironment.ServiceForwarderUnknownType(new Uri("dssp.tcp://localhost/" + Name)).PostUnknownType(
new DsspDefaultLookup()
{
Body = new LookupRequestType(), ResponsePort = responsePort
});
ServiceInfoType responseRecord = RSUtils.ReceiveSync(responsePort, Myro.Utilities.Params.DefaultRecieveTimeout);
// Try to find a working contract for each adapter
foreach (var factory in adapterFactories)
{
try
{
ServiceInfoType serviceRecord = RSUtils.FindCompatibleContract(responseRecord, factory.SupportedContracts);
T ret = (T)factory.Create(serviceRecord);
Console.WriteLine("Attached to " + serviceRecord.Service + " as \"" + Name + "\"");
return(ret);
}
catch (NoContractFoundException) { }
}
// If we haven't returned already in the loop, we didn't find
// an adapter that works.
throw new NoAdapterFoundException(responseRecord);
}
catch (NoAdapterFoundException)
{
throw;
}
catch (Exception e)
{
DssEnvironment.LogError("Error querying or attaching to " + "dssp.tcp://localhost/" + Name + ": " + e.ToString());
throw;
}
}
}
