Drools 5.1.0.M2 - WorkItemNodeInstance -- Listeners can't get hold of WorkItem object
by Vijay K Pandey
Hi,
There is a change done in Drools 5.1.0.M2 - org.drools.workflow.instance.node.WorkItemNodeInstance class in the method
public void triggerCompleted(WorkItem workItem) at line 196 which is setting the workItemId as -1
this.workItemId = -1;
Due to the above change the listeners which are attached to the "complete" event of the work item - such as the method below
public void beforeNodeLeft(ProcessNodeLeftEvent event) are not able to get hold of the associated workitem object as it returns null.
Is there any specific reason that workItemId is set to -1 even before the associated listeners get triggered or is this a bug?
If it was an intended change then how do I get hold of the "WorkItem" object in the attached listeners.
Thanks
Vijay
p.s This change was not there in the snapshot of 18th April 2010 which I was earlier working on. Above is the only change in this class from the snapshot of 18th April and 5.1.0.M2
15 years, 7 months
Workflow Validation
by Vahl, Thomas E
Hello,
I'm a new Drools user (5.0.1), and have several times gotten NPE's due
to a syntax error in a Split constraint. Example, using "=" instead of
"==" in the condition. Is there an external validator for the xml that
would catch this type of thing before runtime?
Thanks,
Thomas Vahl
E-mail: thomas.e.vahl(a)baml.com
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15 years, 7 months
Drools Fusion into Drools Flow
by Thorsten
Hello out there,
have someone of you tried to combine Drools Fusion into Flow in order to
control the different steps of the propagating event stream. I know that
I can define some ruleflow groups (and the corresponding rules) and
order them visually but I am not sure if one group has to be finished
first before the next ruleflow sets in. The other problem is the
insertion of the data. Is there a way to let the data “flow” into and
thru my process?
In my last experiment I created some data manually using a action-node
but when I tried to insert them into a WorkingMemoryEntry point I
received a “funny” mismatch error:
>> >>Type mismatch: cannot convert from WorkingMemoryEntryPoint to
WorkingMemoryEntryPoint<<
I am using Drools 5.1. M2, with Eclipse (20100218-1602)
Thanks and kind regards
Thorsten
15 years, 7 months
error importing .brl files
by Fnu Mahalakshmi
Hi guys,
Thanks for the help on Alerts.
I have trouble importing .brl files from my drools-guvnor editor.
When I import it I get the following error I get the error that the file cant be opened.
When I create it separately in my eclipse I do not get the drop down to choose from my facts. It shows empty drop down.
I imported the jar files to the classpath of my project - added the classes to the same directory - created a .package file where I added all the import statements.
But still not working. Any Idea what is the problem????
Thank you
M
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15 years, 7 months
Drools Rule Engine - Tiered Rates
by ramram
Hi All,
I have the following question regarding Drools. The possibility to
implement tiered rates and that is I have the following example.
If the total units sold is between 0 - 1000 item a revenue return is 10%
while if the total units sold is between 1001- 2000 items the return is 20%.
I want to use 1 dynamic rule to implement the above example rather than
having 2 static rules defined? is this possible through drools?
Regards
Ram
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15 years, 7 months
alerts in drools
by Fnu Mahalakshmi
Hi,
Is there anyway I can create "alerts" in drools??
If there is any documentation for it could someone point me towards it??
Thank you
-m
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15 years, 7 months
Regarding a fact model
by shekharputtur puttur
Hi ALL,
I have created a dynamic fact model in guvnor for creating rules.I want to
use the same fact model in my java application too.
How do i create a jar for the created model in guvnor and download the same?
Another way is to create a fact model in java(eclipse editor), and we can
upload the same for writing rules.
But for my application , i need to use the first approach.
i use guvnor 5.1.0M1.
Could you please tell me solution to do this?
Thanks & Regards
Shekhar
15 years, 7 months
data manipulation
by Betto Bardi
Hi all,
We recently implemented Drools in a mortgage application process. The primary task of the business rule engine was to determine the fraud risk of an application. The application is delivered in XML format. We noticed that we were implementing a lot of data manipulation actions in the drl file itself. For example, the calculation of total income by calculating the sum of a number of elements or calculating the distance between two geo-locations based on zip codes. The actual evaluation rules acted on this 'derived' information.
When looking back the drl file contained a lot of code and looked pretty complicated compared to the actual evaluation rules. My question is, what is your opinion on data manipulation or transformation within the drl file? If the drl file is not the best place for this, what would you suggest for data manipulation?
Thanks,
Betto
15 years, 7 months
error getting values from working memory
by Fnu Mahalakshmi
Hi,
I am facing problem in getting modified data from my working memory to my output file.
I have added all my data to an ArrayList. Sent it to my Rules - modified the input.
Now I want it to display the data contained in the objects of my list.
Unable to do that as I can only map it to ArrayList<Object>
So I am not able to call the particular functions for displaying particular data.
I tried adding my data to a HashMap<Object,String> but then data does not get loaded in the working memory.
Please help!!!
Thank you
M
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15 years, 7 months
Multiple Files Problem
by Fnu Mahalakshmi
Hi,
I need to load data contained in many Lists as my input.
In what way is it possible for me to load multiple lists in drools?
I am doing this currently:
public void runStatelessRules(String[] rulesFiles,String dslFileName,Collection<Object>al,
String ruleFlowFileName) throws Exception {
RuleBase ruleBase = loadRules(rulesFiles);
StatelessSession workingMemory = ruleBase.newStatelessSession();
workingMemory.execute(al);
}
Collection<Object>al is my input. In this I have dumped data from multiple arrayLists.
All rules get processed accurately.
But creates a mess when I need to write to my output file.
Is it in some way possible for me to give separate lists to load to my working memory???
Please help. Thanks in advance.
-M
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15 years, 7 months
