[rules-users] Stateless K-Session but no Sequential Mode

[Greg Barton]

The stateless session is just a convenience wrapper around the stateful session.   

GreG

On Oct 20, 2010, at 6:52, "Swindells, Thomas" <TSwindells at nds.com> wrote:

That is enough reason in itself - why go to the bother of having to do inserts, fire all rules and dispose separately when stateless sessions do that all for you - as the javadoc says:
"StatelessKnowledgeSession provides a convenience API, wrapping StatefulKnowledgeSession. It avoids the need to call dispose()."



-----Original Message-----
From: rules-users-bounces at lists.jboss.org [mailto:rules-users-
bounces at lists.jboss.org] On Behalf Of Wolfgang Laun
Sent: 20 October 2010 12:34
To: Rules Users List
Subject: Re: [rules-users] Stateless K-Session but no Sequential Mode

If I understand this correctly, there isn't much point in having a
non-sequential-mode stateless session.

If I want a one-shot execution, I can call inserts, fireAllRules and
dispose() just as well in a stateful session.

Possibly this is due to past development.

Thanks!
-W



On 20 October 2010 09:13, Swindells, Thomas <TSwindells at nds.com> wrote:
I've not used it but from what I understand:
Sequential mode:
1. Insert facts
2. Create activations.
3. Fire all activations.
4. Done.

None Sequential (Standard) mode:
1. Insert facts.
2. Create initial activations.
3. Pop and fire highest salience activation.
4. Update activations (if update, retract etc was performed).
5. If there are more activations goto 3.
6. Done.

They key difference is that in the standard mode rule consequences can
activate and deactivate activations as they update the working memory.

Thomas

-----Original Message-----
From: rules-users-bounces at lists.jboss.org [mailto:rules-users-
bounces at lists.jboss.org] On Behalf Of Wolfgang Laun
Sent: 19 October 2010 22:34
To: Rules Users List
Subject: Re: [rules-users] Stateless K-Session but no Sequential Mode

Indeed I have, and I've read it down to the last paragraph:
"Sequential mode can only be used with a Stateless Session and is off
by default. To turn it on, either call..." This tells me about a
StatelessKnowledgeSession WITH sequential mode.

So, what if I create a StatelessKnowledgeSession from a KnowledgeBase,
but do not turn sequential mode on?

Best
-W


2010/10/19 Michael Anstis <michael.anstis at gmail.com>:
No doubt I'm missing the point but have you seen "3.3.7.1. Sequential
Mode"
in Expert's documentation?

On 19 October 2010 21:27, Wolfgang Laun <wolfgang.laun at gmail.com> wrote:

As I understand the Expert documentation, Sequential Mode has to be
turned on, even with a Stateless Knowledge Session to achieve all the
shortcuts and speed-ups.

What the documentation does not tell me (or I haven't seen it) is the
difference of a Stateless Knowledge Session with and without Sequential
Mode.

Cheers
Wolfgang
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