get_association (OpenID::Server::Signatory)

    # File lib/openid/server.rb, line 1095
          def get_association(assoc_handle, dumb, checkExpiration=true)
            # Hmm.  We've created an interface that deals almost entirely
            # with assoc_handles.  The only place outside the Signatory
            # that uses this (and thus the only place that ever sees
            # Association objects) is when creating a response to an
            # association request, as it must have the association's
            # secret.

            if !assoc_handle
              raise ArgumentError.new("assoc_handle must not be None")
            end

            if dumb
              key = @@_dumb_key
            else
              key = @@_normal_key
            end

            assoc = @store.get_association(key, assoc_handle)
            if assoc and assoc.expires_in <= 0
              Util.log(sprintf("requested %sdumb key %s is expired (by %s seconds)",
                               (!dumb) ? 'not-' : '',
                               assoc_handle, assoc.expires_in))
              if checkExpiration
                @store.remove_association(key, assoc_handle)
                assoc = nil
              end
            end

            return assoc
          end