#6 State awareness

[Gary Hale]

Introduce state awareness. State says that the situation fires when some condition occurs, beginning the state, and then does not fire again until the state is left - via another situation. For example:

condition jobStarted is jobEvent within 5000;
condition jobStopped is not jobEvent within 15000;

action notifyStart is { ... };
action notifyStop is { ... };

state jobRunning begins with notifyStart ends with notifyStop;

when jobStarted start jobRunning;
when jobStopped stop jobRunning;

Not a good example, because you could do this without state, but I'll come back with a better example later...