[drools-dev] agenda groups

[Mark Proctor]

For all those wondering how agenda groups work. I just commited the 
integration test that shows agenda groups and autofocus working. this is 
a much more powerful way to do execution flow control. This will be part 
of the beta 2 release later today.

   public void testAgendaGroups() throws Exception {
       PackageBuilder builder = new PackageBuilder();
       builder.addPackageFromDrl( new InputStreamReader( 
getClass().getResourceAsStream( "test_AgendaGroups.drl" ) ) );
       Package pkg = builder.getPackage();
      
       RuleBase ruleBase = getRuleBase();
       ruleBase.addPackage( pkg );
       WorkingMemory workingMemory = ruleBase.newWorkingMemory();
      
       List list = new ArrayList();
       workingMemory.setGlobal( "list", list );  
             
       Cheese brie = new Cheese( "brie", 12 );      
       workingMemory.assertObject( brie );
      
       workingMemory.fireAllRules();
      
       assertEquals( 7, list.size() );
      
       assertEquals( "group3", list.get( 0 ) );
       assertEquals( "group4", list.get( 1 ) );
       assertEquals( "group3", list.get( 2 ) );
       assertEquals( "MAIN", list.get( 3 ) );
       assertEquals( "group1", list.get( 4 ) );
       assertEquals( "group1", list.get( 5 ) );
       assertEquals( "MAIN", list.get( 6 ) );       
   }        

-----------------------------------------
package org.drools.test;

import org.drools.Cheese;

global java.util.List list;

rule "test MAIN 1"
   salience  10
   when
       Cheese( )
   then
       list.add( "MAIN" );
       drools.setFocus( "group1" );
end

rule "test MAIN 2"
   when
       Cheese( )
   then
       list.add( "MAIN" );
end

rule "test group1 1"
   agenda-group "group1"
   when
       Cheese( )
   then
       list.add( "group1" );
end 

rule "test group1 2"
   agenda-group "group1"
   when
       Cheese( )
   then
       list.add( "group1" );
end 

rule "test group2"
   agenda-group "group2"
   when
       Cheese( )
   then
       list.add( "group2" );
end 

rule "test group3 1"
   salience 5
   agenda-group "group3"
   auto-focus true
      
   when
       Cheese( )
   then       
       list.add( "group3" );
       drools.setFocus( "group4" );       
end 

rule "test group3 2"
   agenda-group "group3"
   when
       Cheese( )
   then
       list.add( "group3" );
end 

rule "test group4"
   agenda-group "group4"
   when
       Cheese( )
   then
       list.add( "group4" );
end