subscribe-bookmark-completed

Importing the AMPS client library:

using AMPS.Client;
using AMPS.Client.Exceptions;

Constructing the command:

Command cmd = new Command(Message.Commands.Subscribe)
                  .setTopic(topic)

                  // consistent ID for recovery purposes
                  .setSubId(subId)

                  // Recover from the bookmark store's
                  // replay point, or the beginning of the
                  // txlog if there is no existing recovery point

                 .setBookmark(Client.Bookmarks.MOST_RECENT)

                 // Set the filter to use for the subscription
                 .addAckType(Message.AckType.Completed)
              ;

The command can now be used in execute or executeAsync.