Yeah..more fun with functions. I have the following function
function String getMyValue(){ return "value 1"; }
I have declared it at the top of the rule file right after all imports and
dialect statement but before any rules
<imports>
global Services services;
global String currentProfilie;
# setup dialect for the semantic code to be MVEL
dialect "mvel"
function String getMyValue(){ return "value 1"; }
I then try to call the function from another rule consequence as a test:
then
System.err.println(getMapRouterAddress());
<other statements which work fine>
Now as soon as I start up and the rule file is loaded, I get a null pointer
exception that isn't really helpful as it simpoly points to one of my own
external objects that references the session that failed to load.
I have tried using functions many times and never successfully done so.
How/where do I place a simple function like this and call it?
Thanks
Chris
________________________________________
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Wolfgang Laun
Sent: Wednesday, October 14, 2009 8:15 AM
To: Rules Users List
Subject: Re: [rules-users] setting globals in rule file
You could let the "user" write some functions such as
function String parFoo(){ return "foo42"; }
and evaluate them in a rule firing with high priority on eval(true).
-W
2009/10/14 Chris Richmond <crichm...@referentia.com>
Hmm
Well..I have this rule file and it seems like a darn convenient place to set
some configuration settings so the user could change them in the plain text
file. Otherwise I have to implement another configuration settgin system
then feed that to th setGlobal
Chris
________________________________________
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Wolfgang Laun
Sent: Wednesday, October 14, 2009 7:50 AM
To: Rules Users List
Subject: Re: [rules-users] setting globals in rule file
No, globals can only be set by calling the WorkingMemory method
wm.setGlobal(String name, Object value)
You could call this in a consequence (RHS), but it's usually not a good idea
to do so.
What do you want to achieve?
-W
2009/10/14 Chris Richmond <crichm...@referentia.com>
Shouldnt it be possible to set a global variable value within the rule file
itself at the top. Something like?
global String deviceName = myDevice;
I thought you could do that, but consistently get an error saying illegal
character = expected (
Or something along those lines.
This is possible and that syntax should work, shouldnt it?
Thanks,
Chris
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