public Class SSLFlowDelegate

Constructor takes two subscribers - downReader and downWriter. downReader receives the application data (after it has been decrypted by SSLFlowDelegate). downWriter receives the network data (after it has been encrypted by SSLFlowDelegate).

Method upstreamWriter() returns a subscriber which should be subscribed with a publisher which publishes application data that can then be encrypted into network data by this SSLFlowDelegate and handed off to the downWriter.

Method upstreamReader() returns a subscriber which should be subscribed with a publisher which publishes encrypted network data that can then be decrypted into application data by this SSLFlowDelegate and handed off to the downReader.

Errors are reported to the downReader subscriber.

The diagram below illustrates how the Flow.Subscribers are used in this class, and where they come from:

--------->  data flow direction


                 |                                   ^
 upstreamWriter  |                                   | downReader
 obtained from   |                                   | supplied to
upstreamWriter() |                                   | constructor
                 v                                   |
     +-----------------------------------------------------------+
     *                                            decrypts       *
     *                       SSLFlowDelegate                     *
     *        encrypts                                           *
     +-----------------------------------------------------------+
                 |                                   ^
   downWriter    |                                   | upstreamReader
   supplied to   |                                   | obtained from
   constructor   |                                   | upstreamReader()
                 v                                   |