[rules-users] Drools 5 setGlobal

[Samuli Saarinen]

Hello,

I'm new to drools and have problems with globals or with the different 
behaviour of drools depending on how the globals are specified.

I have the following simple rule:

global String test

rule "Global"
   when
   then
     System.out.println(test);
end

If i run the rule with:

KnowledgeBase kb = getKnowledgeBase("global.drl");
StatelessKnowledgeSession ses = kb.newStatelessKnowledgeSession();
ses.setGlobal("test2", "foo");
ses.execute("");

I get the expected result of null printed

but if I use commands:

KnowledgeBase kb = getKnowledgeBase("global.drl");
StatelessKnowledgeSession ses = kb.newStatelessKnowledgeSession();
List<Command<?>> cmds = new ArrayList<Command<?>>();
cmds.add(CommandFactory.newSetGlobal("test2", "bar"));
cmds.add(CommandFactory.newInsert(""));
ses.execute(CommandFactory.newBatchExecution(cmds));

I get java.lang.RuntimeException: Unexpected global [test2]

Why is the behaviour different and which one is correct?

Regards,

Samuli


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