RE: [rules-users] Timer does not return!
Ajay,
Apparently the engine is in a deadlock in this specific situation. The
reason is that, while in reactive mode (using fireUntilHalt()), the
engine does not accept any fireAllRules() invocations (which is used
internally in the process engine), and as a result blocks the process
from continuing. In reactive mode, the engine should however simply
ignore fireAllRules() invocations (as it is executing already). This
has been fixed on trunk. So if you upgrade to the latest snapshot
(either get it here
https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/
or build locally), you should be fine.
Regarding the second issue, what you are seeing is probably not the case
that the process has not ended, but the fact that the application does
not end automatically because the engine is still running in reactive
mode in a separate thread. You can halt the engine by calling
ksession.halt().
Kris
Quoting ajay.gau...@rbs.com:
Bump! Anyone?
-Original Message-
Thanks for the sample code Kris. It seems that the problem is not
with the Timer itself, but with WorkItemHadler !
(Complete code - extended version of your code - is attached). Adding
a Log work item between START and the first Action breaks the code.
If I remove the Log item, the flow works as expected. Here is the
code that runs in executeWorkItem:
logger.info(=== message from flow === +
workItem.getParameter(Message));
manager.completeWorkItem(workItem.getId(), null);
logger.info(Work item completed!);
the 2nd log message is not displayed!
Any ideas what am I doing wrong?
Second issue: The process does not end! - I took Kris's code and ran
it. Even after the work flow completed, the process was still alive!
(End Node's Terminate Property *is* set to true).
Thanks
Ajay
-Original Message-
From: Kris Verlaenen [mailto:kris.verlae...@cs.kuleuven.be]
Sent: Friday, June 05, 2009 5:08 PM
To: Rules Users List; Gautam, Ajay, GBM
Cc: rules-users@lists.jboss.org
Subject: Re: [rules-users] Timer does not return!
It's difficult to figure out what's going on without looking at the
process itself, but your code seems to be fine. If you run the
engine
in reactive mode (using fireUntilHalt), it should automatically fire
the
action associated with the timer once it goes off. Note that, if
you
are not running in reactive mode, the timer is also triggered (it
doesn't just run through), but it'll wait to execute the associated
action until fireAllRules is called.
For example, this simple process is a timer followed by an action
writing out when the timer is being triggered.
?xml version=1.0 encoding=UTF-8?
process xmlns=http://drools.org/drools-5.0/process;
xmlns:xs=http://www.w3.org/2001/XMLSchema-instance;
xs:schemaLocation=http://drools.org/drools-5.0/process
drools-processes-5.0.xsd
type=RuleFlow name=ruleflow id=com.sample.ruleflow
package-name=com.sample
header
/header
nodes
start id=1 name=Start x=16 y=16 width=80 height=40
/
timerNode id=4 name=Timer x=128 y=16 width=80
height=40
delay=2000 /
actionNode id=2 name=Action x=240 y=16 width=80
height=40
action type=expression dialect=mvel
System.out.println(Executing);/action
/actionNode
end id=3 name=End x=352 y=16 width=80 height=40 /
/nodes
connections
connection from=1 to=4 /
connection from=4 to=2 /
connection from=2 to=3 /
/connections
/process
By using the following code, the action is written out immediately
when
the timer triggers (after 2 seconds):
public static final void main(String[] args) {
try {
// load up the knowledge base
KnowledgeBase kbase = readKnowledgeBase();
final StatefulKnowledgeSession ksession =
kbase.newStatefulKnowledgeSession();
new Thread(new Runnable() {
public void run() {
ksession.fireUntilHalt();
}
}).start();
// start a new process instance
ksession.startProcess(com.sample.ruleflow);
} catch (Throwable t) {
t.printStackTrace();
}
}
The following code doesn't use reactive mode, so the action
associated
with the timer is only triggered during the next fireAllRules (after
4
seconds).
public static final void main(String[] args) {
try {
// load up the knowledge base
KnowledgeBase kbase = readKnowledgeBase();
final StatefulKnowledgeSession ksession =
kbase.newStatefulKnowledgeSession();
// start a new process instance
ksession.startProcess(com.sample.ruleflow);
Thread.sleep(4000);
ksession.fireAllRules();
} catch (Throwable t) {
t.printStackTrace();
}
}
Hope this clears up the situation a little more. If you still have
problems integrating timers in your process, could you send a
standalone
example (containing both the process xml and the Java code)?
Thx,
Kris
Quoting
RE: [rules-users] Drools in the real world
We are using drools in our production software for decision support. We mostly like the decision tables and how easy it is for me to allow a user to modify the rules for a particular installation without me having to write code. We are, in fact, continuing to expand our usage of drools for new facets of our application where the business rules are extremely complicated and vary widely by implementation. -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of ajay.gau...@rbs.com Sent: Friday, June 12, 2009 9:28 AM To: rules-users@lists.jboss.org Subject: [rules-users] Drools in the real world Are people actually using Drools Or Drools Flow in production? The traffic on this list seems way too low to suggest any serious industry consideration. OTOH, there are books out there for Drools. Which does suggest serious usage. What am I missing? Ajay Gautam *Please note that my email address may have changed. For all future correspondence, please use this address* This message (including any attachments) is confidential and/or privileged. It is to be used by the intended recipients only. If you have received it by mistake please notify the sender by return e-mail and delete this message from your system. Any unauthorized use or dissemination of this message in whole or in part is strictly prohibited. Please note that e-mails are inherently insecure and susceptible to change. The Royal Bank of Scotland Group, plc (RBS) and its US subsidiaries, and affiliates and subsidiary undertakings, including but not limited to, RBS plc New York and Connecticut Branches, RBS Securities Inc., ABN AMRO Bank N.V. New York and Chicago Branches and, ABN AMRO Incorporated, Citizens Financial Group, Inc. and RBS Citizens, N.A., shall not be liable for the improper or incomplete transmission of the information contained in this communication or Attachment nor for any delay in its receipt or damage to your system. RBS does not guarantee that the integrity of this communication has been maintained nor that this communication is free of viruses, interceptions or interference. RBS and its subsidiaries and affiliates do not guarantee the accuracy of any email or attachment, that an email will be received or that RBS or its affiliates and subsidiaries will respond to an email. RBS makes no representations that any information contained in this message (including any attachments) are appropriate for use in all locations or that transactions, securities, products, instruments or services discussed herein are available or appropriate for sale or use in all jurisdictions, or by all investors or counterparties. Those who utilize this information do so on their own initiative and are responsible for compliance with applicable local laws or regulations. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Drools in the real world
Are people actually using Drools Or Drools Flow in production? The traffic on this list seems way too low to suggest any serious industry consideration. OTOH, there are books out there for Drools. Which does suggest serious usage. What am I missing? Ajay Gautam *Please note that my email address may have changed. For all future correspondence, please use this address* This message (including any attachments) is confidential and/or privileged. It is to be used by the intended recipients only. If you have received it by mistake please notify the sender by return e-mail and delete this message from your system. Any unauthorized use or dissemination of this message in whole or in part is strictly prohibited. Please note that e-mails are inherently insecure and susceptible to change. The Royal Bank of Scotland Group, plc (RBS) and its US subsidiaries, and affiliates and subsidiary undertakings, including but not limited to, RBS plc New York and Connecticut Branches, RBS Securities Inc., ABN AMRO Bank N.V. New York and Chicago Branches and, ABN AMRO Incorporated, Citizens Financial Group, Inc. and RBS Citizens, N.A., shall not be liable for the improper or incomplete transmission of the information contained in this communication or Attachment nor for any delay in its receipt or damage to your system. RBS does not guarantee that the integrity of this communication has been maintained nor that this communication is free of viruses, interceptions or interference. RBS and its subsidiaries and affiliates do not guarantee the accuracy of any email or attachment, that an email will be received or that RBS or its affiliates and subsidiaries will respond to an email. RBS makes no representations that any information contained in this message (including any attachments) are appropriate for use in all locations or that transactions, securities, products, instruments or services discussed herein are available or appropriate for sale or use in all jurisdictions, or by all investors or counterparties. Those who utilize this information do so on their own initiative and are responsible for compliance with applicable local laws or regulations. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools in the real world
I have built 2 systems for *very* large and well know companies that rely heavily on drools. On Fri, Jun 12, 2009 at 9:32 AM, Hehl, Thomas thomas.h...@acs-inc.comwrote: We are using drools in our production software for decision support. We mostly like the decision tables and how easy it is for me to allow a user to modify the rules for a particular installation without me having to write code. We are, in fact, continuing to expand our usage of drools for new facets of our application where the business rules are extremely complicated and vary widely by implementation. -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of ajay.gau...@rbs.com Sent: Friday, June 12, 2009 9:28 AM To: rules-users@lists.jboss.org Subject: [rules-users] Drools in the real world Are people actually using Drools Or Drools Flow in production? The traffic on this list seems way too low to suggest any serious industry consideration. OTOH, there are books out there for Drools. Which does suggest serious usage. What am I missing? Ajay Gautam *Please note that my email address may have changed. For all future correspondence, please use this address* This message (including any attachments) is confidential and/or privileged. It is to be used by the intended recipients only. If you have received it by mistake please notify the sender by return e-mail and delete this message from your system. Any unauthorized use or dissemination of this message in whole or in part is strictly prohibited. Please note that e-mails are inherently insecure and susceptible to change. The Royal Bank of Scotland Group, plc (RBS) and its US subsidiaries, and affiliates and subsidiary undertakings, including but not limited to, RBS plc New York and Connecticut Branches, RBS Securities Inc., ABN AMRO Bank N.V. New York and Chicago Branches and, ABN AMRO Incorporated, Citizens Financial Group, Inc. and RBS Citizens, N.A., shall not be liable for the improper or incomplete transmission of the information contained in this communication or Attachment nor for any delay in its receipt or damage to your system. RBS does not guarantee that the integrity of this communication has been maintained nor that this communication is free of viruses, interceptions or interference. RBS and its subsidiaries and affiliates do not guarantee the accuracy of any email or attachment, that an email will be received or that RBS or its affiliates and subsidiaries will respond to an email. RBS makes no representations that any information contained in this message (including any attachments) are appropriate for use in all locations or that transactions, securities, products, instruments or services discussed herein are available or appropriate for sale or use in all jurisdictions, or by all investors or counterparties. Those who utilize this information do so on their own initiative and are responsible for compliance with applicable local laws or regulations. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools in the real world
We have been using Drools since version 2, and currently have well over 10,000 rules in production. It is a very solid product that can be used anywhere an Ilog etc would be considered. Drools Flow is a bit new, although I know there are several companies who have it in production. We are currently testing it internally, and it shows huge promise. -Michael - Original Message - From: Ajay Gautam ajay.gau...@rbs.com To: rules-users@lists.jboss.org Sent: Friday, June 12, 2009 8:28:26 AM GMT -06:00 US/Canada Central Subject: [rules-users] Drools in the real world Are people actually using Drools Or Drools Flow in production? The traffic on this list seems way too low to suggest any serious industry consideration. OTOH, there are books out there for Drools. Which does suggest serious usage. What am I missing? Ajay Gautam *Please note that my email address may have changed. For all future correspondence, please use this address* This message (including any attachments) is confidential and/or privileged. It is to be used by the intended recipients only. If you have received it by mistake please notify the sender by return e-mail and delete this message from your system. Any unauthorized use or dissemination of this message in whole or in part is strictly prohibited. Please note that e-mails are inherently insecure and susceptible to change. The Royal Bank of Scotland Group, plc (RBS) and its US subsidiaries, and affiliates and subsidiary undertakings, including but not limited to, RBS plc New York and Connecticut Branches, RBS Securities Inc., ABN AMRO Bank N.V. New York and Chicago Branches and, ABN AMRO Incorporated, Citizens Financial Group, Inc. and RBS Citizens, N.A., shall not be liable for the improper or incomplete transmission of the information contained in this communication or Attachment nor for any delay in its receipt or damage to your system. RBS does not guarantee that the integrity of this communication has been maintained nor that this communication is free of viruses, interceptions or interference. RBS and its subsidiaries and affiliates do not guarantee the accuracy of any email or attachment, that an email will be received or that RBS or its affiliates and subsidiaries will respond to an email. RBS makes no representations that any information contained in this message (including any attachments) are appropriate for use in all locations or that transactions, securities, products, instruments or services discussed herein are available or appropriate for sale or use in all jurisdictions, or by all investors or counterparties. Those who utilize this information do so on their own initiative and are responsible for compliance with applicable local laws or regulations. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools in the real world
Hello, For the last 3 years, i have done 5 projects in production with drools 4.0.7 as I started that business in my company And we have currently 5 project that will start this year with brms In my company, i do a drools training starting end of month and 5 more times in september and october. I answer (we are 8000 in France) with drools 5 or 6 times a month without people trained. Wait one or two years and ilog/ibm will be wipped out ! It is a clear serious Industry tool One of our customer is using it in a loyalty system in shops (supermarket from 10 to 140 cash machines). Per day on the biggest shop thery are over 3 custumer/day = 0 bug Another customer is using it for collection calculation and buget consideration = millions of € calculation for one year = 700 shop customer that is counting on drools to prepare the product collection and we have other yes it works and fine regads Nicolas Heron PS : did you go on the irc channel ? you should ! 2009/6/12 ajay.gau...@rbs.com Are people actually using Drools Or Drools Flow in production? The traffic on this list seems way too low to suggest any serious industry consideration. OTOH, there are books out there for Drools. Which does suggest serious usage. What am I missing? Ajay Gautam *Please note that my email address may have changed. For all future correspondence, please use this address* This message (including any attachments) is confidential and/or privileged. It is to be used by the intended recipients only. If you have received it by mistake please notify the sender by return e-mail and delete this message from your system. Any unauthorized use or dissemination of this message in whole or in part is strictly prohibited. Please note that e-mails are inherently insecure and susceptible to change. The Royal Bank of Scotland Group, plc (RBS) and its US subsidiaries, and affiliates and subsidiary undertakings, including but not limited to, RBS plc New York and Connecticut Branches, RBS Securities Inc., ABN AMRO Bank N.V. New York and Chicago Branches and, ABN AMRO Incorporated, Citizens Financial Group, Inc. and RBS Citizens, N.A., shall not be liable for the improper or incomplete transmission of the information contained in this communication or Attachment nor for any delay in its receipt or damage to your system. RBS does not guarantee that the integrity of this communication has been maintained nor that this communication is free of viruses, interceptions or interference. RBS and its subsidiaries and affiliates do not guarantee the accuracy of any email or attachment, that an email will be received or that RBS or its affiliates and subsidiaries will respond to an email. RBS makes no representations that any information contained in this message (including any attachments) are appropriate for use in all locations or that transactions, securities, products, instruments or services discussed herein are available or appropriate for sale or use in all jurisdictions, or by all investors or counterparties. Those who utilize this information do so on their own initiative and are responsible for compliance with applicable local laws or regulations. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] unable to determine value type class *** URGENT***
Srithu wrote: I have a wired behavior.. I have a set of rules and i have used drools-guvnor to packaging them... It is working in windows machines where i have jboss which is running on IBM java 5 and 6.. When i connect the same from jboss Which is running on 64 bit IBM java 6 on linux is not working... The same is working If i used 64 bit IBM java 5 on linux. I getting following exception... Please help [2009-02-11 12:30:29,697] [705980] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - org.drools.RuntimeDroolsException: unable to determine ValueType for Class [class java.lang.Object] [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at org.drools.base.ValueType.determineValueType(ValueType.java:193) [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at org.drools.base.ValueType.readResolve(ValueType.java:125) [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at sun.reflect.GeneratedMethodAccessor121.invoke(Unknown Source) [2009 -02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at java.lang.reflect.Method.invoke(Method.java:599) [deleted stacktrace] We are experiencing same issue on WebSphere 6.1 FP 23 on Linux and AIX. Has anyone found a resolution? Regards Corneil -- View this message in context: http://www.nabble.com/unable-to-determine-value-type-class--***-URGENT***-tp21950333p24000218.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools in the real world
Ajay, I don't know what kind of relationship you draw from list traffic to serious adoption. In any case, do some research and you will certainly re-evaluate your metrics. :) Just as a starting point, last week we had the Drools Bootcamp in SF ( http://blog.athico.com/2009/03/drools-boot-camp-san-francisco-june.html), and that is one of the reasons for the reduced traffic in the last couple weeks I guess. Take a look at the attendance list and the companies they come from: http://www.jboss.org/community/wiki/DroolsBootCampSanFranciscoJune2009 Sightings page: http://www.jboss.org/drools/sightings.html Anyway, what I can tell you is that Drools is in really active and constant development, with a growing and energizing community that supports its members in the best possible open source way (thank you all people). On top of that, if you want professional support with SLAs, talk to Red Hat that offers all kind of services around the product (from support to training). Cheers, Edson 2009/6/12 ajay.gau...@rbs.com Are people actually using Drools Or Drools Flow in production? The traffic on this list seems way too low to suggest any serious industry consideration. OTOH, there are books out there for Drools. Which does suggest serious usage. What am I missing? Ajay Gautam *Please note that my email address may have changed. For all future correspondence, please use this address* -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] setFocus
Converting a 4.0.7 project to 5.0.1 and StatefulKnowledgeSession does not have a .setFocus method like StatefulSession has. How do I accomplish the same function in 5.0.1? Earnie! ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] setFocus
For instance: ksession.getAgenda().getAgendaGroup( Group A ).setFocus(); -W 2009/6/12 Earnest Dyke earnied...@yahoo.com Converting a 4.0.7 project to 5.0.1 and StatefulKnowledgeSession does not have a .setFocus method like StatefulSession has. How do I accomplish the same function in 5.0.1? Earnie! ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] setFocus
getAgenda().getAgendaGroup(String group).setFocus(); We are still discussing if we should create a helper method for this or keeping it normalized like that is good enough. []s Edson 2009/6/12 Earnest Dyke earnied...@yahoo.com Converting a 4.0.7 project to 5.0.1 and StatefulKnowledgeSession does not have a .setFocus method like StatefulSession has. How do I accomplish the same function in 5.0.1? Earnie! ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] unable to determine value type class *** URGENT***
Ok, I saw this problem raised a couple times and it seems to be related with the JVM, not really the app server. It is a classloader problem. Unfortunately, I could not reproduce this in my environment, so if anyone capable of reproducing the problem is willing to work with me on this, we can look for a solution. First of all, I need the complete stack trace of the problem, as well as drools version, mvel version, complete JVM version and revision. Then, it would be good if you can isolate the problem in a small test case, otherwise we will have to go without it for now. Having that information, I will try to make some code changes and send you and see what happens. Thank you, Edson 2009/6/12 Corneil du Plessis corn...@tsctech.com Srithu wrote: I have a wired behavior.. I have a set of rules and i have used drools-guvnor to packaging them... It is working in windows machines where i have jboss which is running on IBM java 5 and 6.. When i connect the same from jboss Which is running on 64 bit IBM java 6 on linux is not working... The same is working If i used 64 bit IBM java 5 on linux. I getting following exception... Please help [2009-02-11 12:30:29,697] [705980] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - org.drools.RuntimeDroolsException: unable to determine ValueType for Class [class java.lang.Object] [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at org.drools.base.ValueType.determineValueType(ValueType.java:193) [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at org.drools.base.ValueType.readResolve(ValueType.java:125) [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at sun.reflect.GeneratedMethodAccessor121.invoke(Unknown Source) [2009 -02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at java.lang.reflect.Method.invoke(Method.java:599) [deleted stacktrace] We are experiencing same issue on WebSphere 6.1 FP 23 on Linux and AIX. Has anyone found a resolution? Regards Corneil -- View this message in context: http://www.nabble.com/unable-to-determine-value-type-class--***-URGENT***-tp21950333p24000218.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] example needed
I would like to work on that application to have a clear example. But I don't find a good topic to do it.. If some one have a very clear topic.. I can do the examples with that... On Fri, Jun 12, 2009 at 7:12 AM, Parvez Shah parvezs...@gmail.com wrote: Is there a Pet store kind of example available which a newbie can download and learn how actually different component in a web application interact with drools using best practice, i have the book jboss drools Business rule by Paul Browne, but i still feel there is a need for pet store kind of application, can any one guide me where i can find some appliaction using drools which i can download and understand full capability of drools ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- - http://salaboy.wordpress.com - http://www.jbug.com.ar - Salatino Salaboy Mauricio - ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] setFocus
Thanks Wolfgang. As usually happens I found this 10 minutes after I sent the email. :-) Earnie! From: Wolfgang Laun wolfgang.l...@gmail.com To: Rules Users List rules-users@lists.jboss.org Sent: Friday, June 12, 2009 11:49:31 AM Subject: Re: [rules-users] setFocus For instance: ksession.getAgenda().getAgendaGroup( Group A ).setFocus(); -W 2009/6/12 Earnest Dyke earnied...@yahoo.com Converting a 4.0.7 project to 5.0.1 and StatefulKnowledgeSession does not have a .setFocus method like StatefulSession has. How do I accomplish the same function in 5.0.1? Earnie! ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Throwing runtimeException 4.0.7 not supposed
Throwing runtime exception in this example inserted person object as person name is null. Ideally need to add error P01 and in second rule checks for precondition P01 exist and skip rule. But i am getting the below error. Please let me know this is bug, i dont want to check again Second Rule name object is not null. I think this is happening since drools frist try to run all rules before start execution. please let me know whether anything wrong on my end. Rule Engine COde : Person person = test.new Person(); // Name name = person.new Name(); // person.setName(name); workingMemory.insert(person); rule First Rule salience 100 lock-on-active true when person : Person() eval(person.name == null) then person.errors.add(P01); System.out.println(Rule 1 invoked+person.errors); update(person); end rule Second Rule salience 99 lock-on-active true when person : Person() eval(!person.errors.contains(P01)) eval(person.name.firstName==Bob) then person.name.suffix=Mr; System.out.println(Rule 2 invoked); end org.drools.RuntimeDroolsException: com.sample.rule_second_rule_0eval1invo...@4b42aa1e : java.lang.NullPointerException at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:82) at org.drools.reteoo.EvalConditionNode.assertTuple(EvalConditionNode.java:148) at org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple(SingleTupleSinkAdapter.java:29) at org.drools.reteoo.EvalConditionNode.assertTuple(EvalConditionNode.java:157) at org.drools.reteoo.CompositeTupleSinkAdapter.createAndPropagateAssertTuple(CompositeTupleSinkAdapter.java:73) at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:116) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:22) at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:162) at org.drools.reteoo.Rete.assertObject(Rete.java:175) at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192) at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:911) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:883) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:684) at com.sample.DroolsTest.main(DroolsTest.java:36) Caused by: java.lang.NullPointerException at com.sample.Rule_Second_Rule_0.eval1(Rule_Second_Rule_0.java:14) at com.sample.Rule_Second_Rule_0Eval1Invoker.evaluate(Rule_Second_Rule_0Eval1Invoker.java:20) at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:77) ... 14 more -- View this message in context: http://www.nabble.com/Throwing-runtimeException-4.0.7-not-supposed-tp24000738p24000738.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools in the real world
The traffic on this list is quite substantial. Note that it is used if people run into a problem, not when they solve one. Judging Drools' industry usage from the traffic here is akin to saying that fine weather is tied to the Moon being full, which you don't see when it is new nor when the sky is overcast... ;-) -W On Fri, Jun 12, 2009 at 3:28 PM, ajay.gau...@rbs.com wrote: Are people actually using Drools Or Drools Flow in production? The traffic on this list seems way too low to suggest any serious industry consideration. OTOH, there are books out there for Drools. Which does suggest serious usage. What am I missing? Ajay Gautam *Please note that my email address may have changed. For all future correspondence, please use this address* This message (including any attachments) is confidential and/or privileged. It is to be used by the intended recipients only. If you have received it by mistake please notify the sender by return e-mail and delete this message from your system. Any unauthorized use or dissemination of this message in whole or in part is strictly prohibited. Please note that e-mails are inherently insecure and susceptible to change. The Royal Bank of Scotland Group, plc (RBS) and its US subsidiaries, and affiliates and subsidiary undertakings, including but not limited to, RBS plc New York and Connecticut Branches, RBS Securities Inc., ABN AMRO Bank N.V. New York and Chicago Branches and, ABN AMRO Incorporated, Citizens Financial Group, Inc. and RBS Citizens, N.A., shall not be liable for the improper or incomplete transmission of the information contained in this communication or Attachment nor for any delay in its receipt or damage to your system. RBS does not guarantee that the integrity of this communication has been maintained nor that this communication is free of viruses, interceptions or interference. RBS and its subsidiaries and affiliates do not guarantee the accuracy of any email or attachment, that an email will be received or that RBS or its affiliates and subsidiaries will respond to an email. RBS makes no representations that any information contained in this message (including any attachments) are appropriate for use in all locations or that transactions, securities, products, instruments or services discussed herein are available or appropriate for sale or use in all jurisdictions, or by all investors or counterparties. Those who utilize this information do so on their own initiative and are responsible for compliance with applicable local laws or regulations. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] setFocus
I vote helper method. :-) Earnie! From: Edson Tirelli tire...@post.com To: Rules Users List rules-users@lists.jboss.org Sent: Friday, June 12, 2009 11:59:40 AM Subject: Re: [rules-users] setFocus getAgenda().getAgendaGroup(String group).setFocus(); We are still discussing if we should create a helper method for this or keeping it normalized like that is good enough. []s Edson 2009/6/12 Earnest Dyke earnied...@yahoo.com Converting a 4.0.7 project to 5.0.1 and StatefulKnowledgeSession does not have a .setFocus method like StatefulSession has. How do I accomplish the same function in 5.0.1? Earnie! ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] multiple .drl files
Hello all, I want to create a baseline rules file with Fusion that does some basic aggregating that I know I will need later.things like keep running averages over the last minute or so of several object values. Is it possible to then inherit or at least reference those aggregates I am keeping track of from another .drl file in some way.allowing me to always keep my basic aggregation functions in one rule file and then add additional rules/functions to my rule memory space later.or must any further rules that wish to reference those aggregate or statistics objects also be contained within the same .drl file? I understand I can have multiple .drl files, but I am wondering specifically about referencing objects and variables created in another rules file. Thanks, Chris ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] unable to determine value type class *** URGENT***
We experienced the same problem when we upgraded to WebSphere 6.1 FP 24 for z/os. We were running Drools 4.0.4 at the time. I don't recall all the jar dependency versions, but we didn't change mvel from whatever Drools 4.0.4 came packaged with. After some testing, we found that Drools 5.0.1 did not exhibit the same problem. Fortunately, upgrading was an option for us and we've been running fine since. I noticed that the catch-all test for ValueType.OBJECT_TYPE in ValueType.determineValueType changed from an instanceof test in 4.0.4 to an Object.class.isAssignableFrom test in 5.0.1. I wondered if a classloader issue caused a difference in the way to two tests were performed, though I didn't have time to investigate the theory. Regards, Rick On 6/12/09, Corneil du Plessis corn...@tsctech.com wrote: Edson Tirelli-3 wrote: Ok, I saw this problem raised a couple times and it seems to be related with the JVM, not really the app server. It is a classloader problem. Unfortunately, I could not reproduce this in my environment, so if anyone capable of reproducing the problem is willing to work with me on this, we can look for a solution. First of all, I need the complete stack trace of the problem, as well as drools version, mvel version, complete JVM version and revision. Then, it would be good if you can isolate the problem in a small test case, otherwise we will have to go without it for now. Having that information, I will try to make some code changes and send you and see what happens. Thank you, Edson 2009/6/12 Corneil du Plessis corn...@tsctech.com Srithu wrote: I have a wired behavior.. I have a set of rules and i have used drools-guvnor to packaging them... It is working in windows machines where i have jboss which is running on IBM java 5 and 6.. When i connect the same from jboss Which is running on 64 bit IBM java 6 on linux is not working... The same is working If i used 64 bit IBM java 5 on linux. I getting following exception... Please help [2009-02-11 12:30:29,697] [705980] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - org.drools.RuntimeDroolsException: unable to determine ValueType for Class [class java.lang.Object] [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at org.drools.base.ValueType.determineValueType(ValueType.java:193) [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at org.drools.base.ValueType.readResolve(ValueType.java:125) [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at sun.reflect.GeneratedMethodAccessor121.invoke(Unknown Source) [2009 -02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR] [STDERR ] - at java.lang.reflect.Method.invoke(Method.java:599) [deleted stacktrace] We are experiencing same issue on WebSphere 6.1 FP 23 on Linux and AIX. Has anyone found a resolution? Regards Corneil -- View this message in context: http://www.nabble.com/unable-to-determine-value-type-class--***-URGENT***-tp21950333p24000218.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users I am sure it is not a Drools problem because everything worked fine on WebSphere 6.1 FP 17 and 21 but with FP 23 the problem started. We did raise an issue with IBM to see if it is possible to find a solution. -- View this message in context: http://www.nabble.com/unable-to-determine-value-type-class--***-URGENT***-tp21950333p24005424.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Drools fusion memory management
Hello, I wanted to ask this question in a separate email so as to keep each email to one topic for easier thread following. Let me know if you prefer multiple questions per email next time. I am using Drools fusion basically with some success where I am at this point only running some aggregates and calling some java functions when a running average over the last 1 minute or so drops below a certain value. The sources for those values come from objects I am injecting into memory space, but I am not specifically calling retraction code since it is my understanding that I can set the policy in the rule file for how long to hold objects in memory. So for example I have this rule which simpoly outputs to out when the average goes above 100 for the last 10 items(you can tell I created mine based on the stock ticker). It seems to be working, but I have some questions to ensure I understand before moving forward. So below the declare MyObject with assigning it role event with a default expiration of 2 minutes. Is my undertanding correct that fusion will disregard thos objects that are injected without me having to take any other action? Also, in my show averages rule below, if I did ont have the declare MyObject delcaration with expiration policy set, would fusion automatially throw away MyObjects older than the last 10 based on my rule no longer needing them?If it would, then which takes priority, the expires declaration for MyObject or the no longer needed by my aggregate rule below. I am assuming that the rule would keep them beyond 2 minutes it it was necessary, but is this correct? If the rule as written would not automatically remove objects from memory space, then is there something I could do to tell the rule to do so when it is no longer needed by my aggregate? Thanks, Chris imports removed # default dialect for the semantic code will be MVEL dialect mvel # tells the engine that a object instance will assume the # role (semantics) of events and that the default retention # policy will be 2 minutes declare MyObject @role( event ) @expires( 2m ) end rule show averages when $n : Number( doubleValue 100 ) from accumulate ( $stat:MyObject($bc: byteCount, srcIPAddress == 10.5.0.4) over window:length(10) from entry-point MyObject stream, average( $bc ) ) then System.err.println(average: + $n) end ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] multiple .drl files
All bound variables are always scoped to the rule, but you can use rules inheritance to extend the rules with your aggregates. It is not the same thing, but might achieve the results you are looking for. []s Edson 2009/6/12 Chris Richmond crichm...@referentia.com Hello all, I want to create a baseline rules file with Fusion that does some basic aggregating that I know I will need later…things like keep running averages over the last minute or so of several object values. Is it possible to then “inherit” or at least reference those aggregates I am keeping track of from another .drl file in some way…allowing me to always keep my basic aggregation functions in one rule file and then add additional rules/functions to my rule memory space later…or must any further rules that wish to reference those aggregate or statistics objects also be contained within the same .drl file? I understand I can have multiple .drl files, but I am wondering specifically about referencing objects and variables created in another rules file. Thanks, Chris ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
