A general model for NWPC's SMS projects, including tree, node, node status, visitor functions and so on.
A node is a task or a container which contains other nodes.
Each node has a status at certain time to indicate what is going on. For example:
- an
activetask means there is a task running. - an
abortedtask means that some task has an error.
A bunch represents a tree of nodes. In our operation system, one bunch is managed by one server program.
This model also provides some access traversing functions which ars useful for dealing with bunches.