The app sub-package

This sub-package has the following files:

• Service: This is a bare-bones example service instance that implements the interface with the cluster-manager.
• Client: This is a bare-bones client that creates a single path by communicating with the cluster-manager.
• createPaths: This can create a bunch of paths one after another. And it can also read the paths.cfg -- same as that explained in the serv-comp sub-package.
• generic_service, generic_client_info: These classes implement the base classes for other services to use. The generic_client_info class is the base class for the information that a service stores for each client.

  generic_client_info implements several data streams:

  • A control stream -- this is what is used to send information about where an upstream node is listening, to the downstream node. Also, heart-beats, and path-kill commands are sent using this stream.
  • A control-ack stream -- this is for the acks for the control packets.
  • A data stream -- for the actual application data.
  • A data-ack stream -- any acks to the application data transmission.
  • A soft-state stream -- for communication of the application-level state from upstream to downstream. The client records this and uses it to start the new path, when an alternate path is setup.