how to write the rule to match the latest facts
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i inserted several facts of one type into the workmemory , but i need just
the latest one, how should i write the rule to match the latest fact
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You'll need an attribute that determines the order. If your facts are
events, there's the timestamp. Otherwise, add a counter.
$latest: F( $c: counter )
not F( counter > $c )
-W
On 05/06/2013, suntrian <suntrian(a)126.com> wrote:
i inserted several facts of one type into the workmemory , but i need
just
the latest one, how should i write the rule to match the latest fact
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http://drools.46999.n3.nabble.com/how-to-write-the-rule-to-match-the-late...
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thanks , i add a global Date() Object nowtime to store the current time and
update it with setGlobal method before insert new facts..then in the rule
files , i add constraint this after nowtime to match the latest fact.
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then it throws java.lang.ClassCastException Error...i remember that there
can't be global object in the LHS ...so i need to adopt your idea , insert a
Date Object instead of using global one.
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suntrian -
Wolfgang Laun