Re: [rules-users] Drools - is dynamic change possible ?

Yes this can be done at runtime. The RuleBase has a reference to each of the created StatefulSessions that has not called dispose() yet and will push those rule changes out to each running session. Mark pns77 wrote: > Thanks for the response. > > Just to confirm when you say "...but you can remove a rule and add > another > in its place..." - can this be done at runtime - i.e server is running, i > go > add a new rule/change the output of an existing rule. If so, can i have > the > new rule take effect ? > > Also, do i need to include any specific jar file for this dynamic feature > ? > > Am not looking at performance here - more from a > maintenance/changeability > point of view. > > > Mark Proctor wrote: > >> you cannot change an individual rule, but you can remove a rule and add >> another in its place. >> >> Mark >> pns77 wrote: >> >>> Have been able to execute/run a sample Drools file >>> >>> import com.sample.Message; >>> >>> rule "Hello World" >>> when >>> m : Message( status == Message.HELLO, message : message, >>> testStringExternal : testStringExternal ) >>> then >>> System.out.println( message ); >>> m.setMessage( "Goodbye cruel world" ); >>> System.out.println( testStringExternal + "Message.HELLO" ); >>> m.setStatus( Message.GOODBYE ); >>> update( m ); >>> end >>> >>> Now, is it possible to change the logic dynamically at runtime ? Or is >>> the >>> drl file used only to externalize the business logic? I tried changing >>> the >>> message in drl file and it didnt get reflected >>> >>> Environment - RAD 6.0/jdk 1.4 >>> >>> Used the following set of jar files >>> C:\Drools\libraries\drools-core.jar; >>> C:\Drools\libraries\drools-compiler.jar; >>> C:\Drools\libraries\mvel14.jar; >>> C:\Drools\libraries\antlr-runtime.jar; >>> C:\Drools\libraries\xstream.jar; >>> C:\Drools\lib\core-3.2.3.v_686_R32x.jar; >>> >>> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> > > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users