There are two options:
1. OperationContext.Current.
Pros: This is pretty straightforward and relatively hard to discover.
Cons: This is a thread local storage, and you are invoking a async call, it does not work well.
2. ChannelParameterCollection
This is very sneaky. You will need to add the object to channel first in your client app code,
// add the token to the channel parameter collection
ChannelParameterCollection parm = (ChannelParameterCollection)( (IChannel)client ).GetProperty<ChannelParameterCollection>();
parm.Add( myState);
Then you can retrieve it from the requirement, and set it on the custom token provider
public override SecurityTokenProvider CreateSecurityTokenProvider( SecurityTokenRequirement tokenRequirement )
{
// retrieve the ChannelParameterCollection from the token requirements
ChannelParameterCollection collection = null;
if ( !tokenRequirement.TryGetProperty<ChannelParameterCollection>( ServiceModelSecurityTokenRequirement.ChannelParametersCollectionProperty, out collection ) )
{
Console.WriteLine( "could not found ChannelParameterCollection" );
}
// now add the collection to your issuedsecuritytokenprovider
CustomIssuedSecurityTokenProvider federationTokenProvider = new CustomIssuedSecurityTokenProvider(collection);
}
The last step is to simply retrieve it from the BeginGetTokenCore() method
public class CustomIssuedSecurityTokenProvider : IssuedSecurityTokenProvider
{
ChannelParameterCollection _collection;
/// <summary>
/// Constructor
/// </summary>
public CustomIssuedSecurityTokenProvider(ChannelParameterCollection collection)
: base()
{
_collection = collection;
}
ChannelParameterCollection Collection
{
get
{
return _collection;
}
}
protected override IAsyncResult BeginGetTokenCore( TimeSpan timeout, AsyncCallback callback, object state )
{
foreach ( object o in _collection )
{
if ( o is someType)
{
// turn it into your type
}
}
…
}
}
Hope it helps
