Hello,
I am looking for an approach to implement "poor man's backtracking" in
Drools.
What I am trying to do is to collect "the impact" of alternate
decisions. In some situations I can not "decide" which path to follow
and what I need to do is to explore several paths and take a decision
based on that results. What I have done so far is to collect the
alternatives as I find them in a list and inserted them one by one.
What I need to do then is to restore the state (backtrack) after I
have explored one path.
My initial approach was to use logicals for this (insert the
"hypothesis", see what happens/ collect the results and retract the
hypothesis). However this messes with the rest of my ruleset quite a
bit. Then I was thinking of maintaining special flags on the asserted
facts but this seems like a kludge to me. So I was wondering whether
someone is aware of a more elegant / generic approach to implement
such backtracking with Drools.
Any hints appreciated.
Cheers,
Ingomar
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