Calling queries or collect() from functions
by Miguel Paraz
Hi,
I have a rule like:
rule "Rule1"
when
$fact: Fact1()
$allFacts: ArrayList() from collect(Fact1())
then
insert(new Fact2($allFacts.size()));
end
I want to compute $allFacts inside a function since I will use it across
different rules.
This doesn't work because it is not valid Java syntax:
function int size() {
ArrayList a = ArrayList() from collect(InQueuePredicate());
return a.size();
}
Could I put this in a named query, and call it from a function?
Thanks!
Miguel
13 years, 2 months
Best practices for Web UI and REST Services
by Miguel Paraz
Hi,
I'm connecting Drools to the Web, both for UI (via JSON+JavaScript),
and REST services.
What are the best practices, or, are there reference apps for this?
As I understand it, the architecture is like: there must be a single
thread running Drools, then with concurrent data structures (e.g.
BlockingQueue) to talk to the web threads.
For synchronous requests, we can send Commands from the web, and
receive BatchExecutionRequests to send back to the UI.
For asynchronous events, this is more challenging - we can have live
queries that are connected to listeners which push the changes to the
UI layer. For the Web UI, the results will need to be queued up until
the client picks them up, For the REST service, we can trigger a
callback to the client's URL.
Any experiences here?
Thanks!
Miguel
13 years, 2 months
Re: [rules-users] Eclipse Debugging Drl file
by benq2188
Hello,
I faced with the same problem. Breakpoints are not being hit by debugger. I
have Eclipse SDK version: 4.2.1 and went through the reference manual of
Drools and followed each step carefully.
-Installed GEF
- Downloaded drools-distribution-5.4.0.Final.zip
-Unzipped it into Eclipse main folder
-Restarted Eclipse
-Defined run time based on the latest Drools project jars included in the
plugin
itself.
-Created Drools Project
-Created new launch configuration for Drools Application.
-Put a breakpoint in the helloworld simple project on the first line of the
section "then".
When I debug it as Drools Application, debugger stops in Java breakpoints
but doesn't stop in drl rule.
Any solutions, how can I fix it?
Thanks in advance.
--
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13 years, 2 months
Drools 5.5.0.CR1 is using a broken cdi-api version
by Cristiano Gavião
Hello,
I'm using Tycho to create a dependency P2 repository (OSGi environment)
containing JBPM 5.4.0.CR1 and DROOLS 5.5.0.CR1.
I got some problem to properly setup the dependencies for the cdi-api.
The bundle knowledge-internal-api has a dependency to cdi-api (version
1.0-SP4), but this version is tied to this:
<groupId>org.jboss.spec.javax.interceptor</groupId>
<artifactId>jboss-interceptors-api_1.1_spec</artifactId>
<version>1.0.0.Beta1</version>
And this 1.0.0.Beta1 version of org.jboss.spec.javax.interceptor was not
well osgified. it doesn't have a Bundle-SymbolicName !
I could handle this problem using a newer version of it:
<dependency>
<groupId>org.jboss.spec.javax.interceptor</groupId>
<artifactId>jboss-interceptors-api_1.1_spec</artifactId>
<version>1.0.1.Final</version>
</dependency>
I won't use cdi anyway, but it could help others that decide to use jbpm
with eclipse.
regards,
Cristiano
13 years, 2 months
