//Called by SoapSmtpOutputChannel.Send(). Implementing
//this on the transport instead of the channel keeps all references to
//transport-specific network resources inside of the transport class, and keeps
//the channels clean.
internal void Send( SoapEnvelope e, EndpointReference destination )
{
//Create a new mailbox based on the TransportAddress of the endpoint. Again,
//we use TransportAddress instead of Address to allow soap.smtp:// endpoints to
//act as intermediaries.
Mailbox box = new Mailbox( destination.TransportAddress, _options );
//Send the message via SMTP.
box.Send( e, destination.TransportAddress );
}
//Creates a new MailClientAsyncResult and begins an asynchronous receive operation.
//When this operation completes, it will call the specified AsyncCallback, carrying the specified
//Mailbox instance as its AsyncState.
//Note that this class derives from Microsoft.Web.Services3.AsyncResult, which gives us
//a lot of useful features.
public MailClientAsyncResult( Mailbox box, AsyncCallback callback )
: base(callback, box)
{
//Initiate the asynchronous operation using the ThreadPool. Sooner or later,
//this will result in the Receive() method being called.
ThreadPool.QueueUserWorkItem( new WaitCallback( this.Receive ) );
}
//Creates a new mailbox and stores it in the mailboxes collection if one
//does not already exist for the specified URI.
internal Mailbox FindOrCreateMailbox( Uri uri )
{
lock ( _mailboxes )
{
if ( !_mailboxes.Contains( uri ) )
{
Mailbox box = new Mailbox( uri, _options );
_mailboxes.Add( uri, box );
}
return ( Mailbox )_mailboxes[ uri ];
}
}