gistfile1.txt

                  +-----------+
                  |           |
                  |  Gateway  |
                  |           |
                  +-----------+
                      |   |
              +-------+   +-------+
              |                   |
        +-----v-----+       +-----v-----+
        |           |       |           |
        |    Foo    |       |    Bar    +-------+
        |           |       |           |       |
        +-----------+       +-----------+      XvXXX
              |                   |           XX   XXXXX
  +----+      |      +---------+  |          X      XX  XX
  |    |      |      |         |  |         XX Cloud      X
  | DB <------+      |  Redis  <--+        XX   Service  XX
  |    |             |         |          XX          XXXX
  +----+             +---------+           X    X      X
                                            XXXXXXXXXXXX