[rules-users] Dynamic updates of stateful sessions

[Esteban Aliverti]

@Wolfgang: if you are using drools.agent.newInstance=true (the default
configuration), then whenever a change-set is applied, either because you
explicitly force the agent to  do so, or because a monitored resource
changes, the kbase inside the agent is thrown away an a new kbase is
created. So you need to get the kbase from the agent and retrieve a fresh
session from it.
You can confirm this behavior in this set of tests:
https://github.com/droolsjbpm/drools/blob/master/drools-compiler/src/test/java/org/drools/agent/KnowledgeAgentIncrementalChangeSetTest.java

But, if you are using drools.agent.newInstance=false the internal kbase (and
each stateful session you got from it) is refreshed when a change-set is
applied.

@maav: could you please post the output log? When you say "it doesn't work"
are you saying that it fails when the agent tries to apply the change-set
for the first time? Or it fails if you modify the package when the agent is
running?

Best Regards,

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com


On Wed, Apr 20, 2011 at 11:08 AM, maav <mattias.avelin at netlight.se> wrote:

> ...I forgot the mention that I've made sure that all files are on the
> classpath. If I go directly for the drl file without using KnowledgeAgent
> and ChangeSet.xml it works.
>
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