Hi Mark, After all the hard work you guys have put into drools recently I hope you had a good holiday. Has anybody had a chance to look at this?
Simon On 20/07/07, Mark Proctor <[EMAIL PROTECTED]> wrote: > > we'll look into this to see where the memory is going. but won't be for > another week or so - I'm currently on holiday. > > Mark > Simon French wrote: > > Hi, > After attending a session with Mark Proctor in London I was inspired to > play around with Drools in a slightly different way than we use it for in > the workplace, and try and solve a puzzle. > Unfortunately I couldn't get Drools to solve it as I kept getting memory > problems (I believe are cartesian joins being the problem), > so I decided to extend the golfer example to see if I got the same problem > I added two new names and a new integer property, club > > // create all possible Golfer objects > String[] names = new String[] { "Fred", "Joe", "Bob", > "Tom", "Des", "Terry" }; > String[] colors = new String[] { "red", "blue", "plaid", > "orange","black", "white" }; > int[] positions = new int[] { 1, 2, 3, 4, 5, 6 }; > int[] clubs = new int[] {9,8,7,4,5,5}; > > for ( int n = 0; n < names.length; n++ ) { > for ( int c = 0; c < colors.length; c++ ) { > for ( int p = 0; p < positions.length; p++ ) { > for ( int q = 0; q < clubs.length; q++ ) { > session.insert(new Golfer( names[n], > colors[c], positions[p], clubs[q]) ); > > .... > > > Then changed the golder.drl to: > > package com.sample > > import com.sample.Golfer; > > > rule "Golfer Riddle" > when > // A golfer named Fred, > > Golfer( name == "Fred", > $fredsPosition : position, $fredsColor : color, $fredsClub > : club ) > > // Der Golfer hinter Fred trägt blau > Golfer( $unknownsName : name != "Fred", > $unknownsPosition : position == ( $fredsPosition + 1 ), > $unknownsColor : color == "blue", color != $fredsColor, > $unknownsClub : club == 5 ) > > // Joe steht an zweiter Stelle > Golfer( name == "Joe", $joesPosition : position == 2, > position != $fredsPosition, > $joesColor : color != $fredsColor, > $joesClub : club == 5 ) > > // Bob traegt Karo > Golfer( name == "Bob", > name != $unknownsName, > $bobsPosition : position != $fredsPosition, > position != $unknownsPosition, position != > $joesPosition, > $bobsColor : color == "plaid", > color != $fredsColor, color != $joesColor, > color != $unknownsColor, > $bobsClub : club < $joesClub ) > > // Tom ist nicht 1. oder 4., traegt kein Orange > Golfer( $tomsName : name == "Tom", > $tomsPosition : position != 1, position != 4, > position != $fredsPosition, position != $joesPosition, > position != $bobsPosition, > $tomsColor : color != "orange", color != "blue", > color != $fredsColor, color != $joesColor, > color != $bobsColor ) > > Golfer ( $des : name == "Des", $desPosition : position < > $fredsPosition, $desColor : color != "blue", > color != $fredsColor, color != $joesColor, > color != $bobsColor ) > Golfer ( $terry : name == "Terry", $terryPosition : position < > $desPosition, $terryColor : color != "blue", > color != $fredsColor, color != $joesColor, > color != $bobsColor ) > then > System.out.println( "Fred " + $fredsPosition + " " + $fredsColor > ); > System.out.println( "Joe " + $joesPosition + " " + $joesColor ); > System.out.println( "Bob " + $bobsPosition + " " + $bobsColor ); > System.out.println( "Tom " + $tomsPosition + " " + $tomsColor ); > > System.out.println ( "Des " + $desPosition + " " + $desColor ); > System.out.println( "terry " + $terryPosition + " " + $terryColor > ); > end > > > After a couple of minutes of processing I got:- > > Exception in thread "main" java.lang.OutOfMemoryError: Java heap space > > I also changed java memory allocation with -Xms1640M -Xmx1640M (The most I > can allocate on my PC), and tried running it as a stateless session too. > > Is there anything else I can do, or is this simply pushing drools too far > (surely not!!) ? > > I'm very keen on pushing this technology as much as possible in our > workplace and I'd really appreciate any help. > > Thanks in advance > > Simon > > ------------------------------ > > _______________________________________________ > rules-users mailing list > [EMAIL PROTECTED]://lists.jboss.org/mailman/listinfo/rules-users > > > > _______________________________________________ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > >
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