Running Workbench applications in GWT SuperDevMode
by Michael Anstis
So, now Chrome (35+) and FireFox don't support GWT "classic" DevMode, I've
managed to run drools-wb in SuperDevMode.
The "classic" DevMode will not be supported in GWT 2.6:
http://www.gwtproject.org/release-notes.html#Release_Notes_2_6_1
Here's my findings on how to configure your webapp, IDE and run (or debug)
the damn thing.
These instructions are for IDEA (NetBeans will probably follow a similar
route).
(1) Create a regular GWT Launcher:
(2) Create a new GWT Launcher for SuperDevmode:
(3) Add the following to your webapp's gwt.xml (module) file:
<!-- SuperDevMode -->
<add-linker name="xsiframe"/>
<set-configuration-property name="devModeRedirectEnabled" value="true"/>
<set-property name="compiler.useSourceMaps" value="true"/>
<set-configuration-property name='xsiframe.failIfScriptTag'
value='false'/>
(4) Launch your regular webapp (the "classic" GWT Launcher):
... <tick>, <tock>, <tick>, <tock> while it compiles and launches...
(5) Launch the SuperDevMode code server (the "SuperDevMode" GWT Launcher):
... <tick>, <tock>, <tick>, <tock> while it compiles and launches...
(6) Drag the "Dev Mode On" and "Dev Mode Off" buttons to your bookmark bar
(as advised) - but we don't normally read these sort of things, right! ;)
(7) Go back to the webapp's browser tab
(8) Click on the "Dev Mode On" bookmark you created in step (6)
(9) Click on "compile"
(10) Delete the "codesvr" part of the URL and press enter (dismiss the
popups that appear; which ones depends on what browser your GWT module
targets; e.g. I had to dismiss a popup about using Chrome but the GWT model
targets FireFox).
(11) Done!
(12) What's that? You want to debug your application?!?
This isn't too bad. Just launch both your "classic" GWT Launcher in debug
mode and the "SuperDevMode" GWT Launcher in normal mode.
Server-side code needs break-points in IDEA, and client-side break-points
need to be added using Chrome's Developer Tools (you'll need to make sure
"sourceMaps" are enabled, but this appears to be the default in Chrome 35).
Accessing Chrome's debugger:
Debugging:
Simple!
It takes a bit of getting used to debugging client-side stuff in Chrome,
and server-side stuff in IDEA, but it's not terrible (although don't expect
to be able to introspect everything in Chrome like you used to in IDEA).
I hope this helps (probably more so as others find "DevMode" stops working
for them.... and when we move to GWT 2.6.1 --- for IE10 support --- so it
is coming sooner than later).
Cheers,
Mike
10 years, 7 months
London (May 26th) Drools & jBPM community contributor meeting
by Mark Proctor
London, Chiswick, May 26th to May 30th
During next week a large percentage of the Drools team, some of the jBPM team and some community members will be meeting in London (Chiswick). There won’t be any presentations, we’ll just be in a room hacking, designing, exchanging ideas and planing. This is open to community members who wish to contribute towards Drools or jBPM, and want help with those contributions. This also includes people working on open source or academic projects that utilise Drools or jBPM. Email me if you want to attend, our locations may very (but within chiswick) each day.
We will not be able to make the day time available to people looking for general Drools or jBPM guidance (unless you want to buy us all lunch). But we will be organising evenings things (like bowling) and could make wed or thu evening open to people wanting general chats and advice. Email me if you’re interested, and after discussing with the team, I’ll let you know.
Those currently attending:
Mark Proctor (mon-fri) Group architect
Edson Tirelli (mon-fri) Drools backend, and project lead
Mario Fusco (mon-fri) Drools backend
Davide Sottara (wed-fri) Drools backend
Alex Porcelli (mon-fri) Drools UI
Michael Anstis (thu-fri) Drools UI
Kris Verlaenen (wed-thu) jBPM backend, and project lead
Mauricio Salatino (mon-fri) jBPM tasks and general UI
10 years, 7 months
Usage of rules-users
by Wolfgang Laun
Hi Team,
the amount of (what is) noise (to me) on the users list has steadily
increased over time. Several distinct topics appear (to me) to be
bunched together needlessly, and I'm beginning to use interest in this
list. IIRC, there was some talk several months ago, that things like
planner, JBPM and Guvnor should have their own lists, but nothing has
come of that.
Best
Wolfgang
10 years, 7 months
Expression Timer NPE Drools 6.0.1.Final
by rogerL
Hello,
I'm encountering an NPE when attempting to use and expression timer in my
rule.
env:
Drools 6.0.1.Final
OS Maverick
IDE Intellij Idea
Java 7
Given the ebb and flow nature of the facts in the system, we want to be able
to control the cycles dynamically. Hence the desire to use the expression
timer.
The expression that I tried is based on the 6.0.1 documentation.
That is, something of the form *Timer(expr: $d, $p)*
In an effort to get beyond the NPE, I tried playing around with the
parameters by using combinations of both longs and appropriately formatted
strings (e.g. 10s, 1m, etc), and using only the delay.
I saw mention that a semicolon should follow the expression. That equally
failed.
The interval and cron timer variations, however, both work.
The .drl and exception are:
declare SystemControlData
isEnabled : boolean = false
delay : long = 30
period : long = 60000
maxCallQueueDepth : int = 1
end
rule "If the system is enabled start campaign check at specified interval"
agenda-group "system_criteria"
// auto-focus true
salience 20
// timer( expr: $d, $p ) throws NPE
// timer( expr: $d; ) throws NPE
timer(cron:0/5 * * * * ?)
when
SystemControlData(isEnabled==true, $d: delay, $p:period,
maxCallQueueDepth>0)
then
drools.setFocus( "campaign_criteria" );
end
Exception in thread "SimpleAsyncTaskExecutor-1"
java.lang.NullPointerException
at
org.drools.core.base.mvel.MVELCompilationUnit.createFactory(MVELCompilationUnit.java:262)
at
org.drools.core.base.mvel.MVELCompilationUnit.getFactory(MVELCompilationUnit.java:276)
at
org.drools.core.base.mvel.MVELObjectExpression.getValue(MVELObjectExpression.java:76)
at org.drools.core.time.TimeUtils.evalTimeExpression(TimeUtils.java:140)
at
org.drools.core.time.impl.ExpressionIntervalTimer.createTrigger(ExpressionIntervalTimer.java:151)
at
org.drools.core.phreak.PhreakTimerNode.createTrigger(PhreakTimerNode.java:260)
at
org.drools.core.phreak.PhreakTimerNode.scheduleLeftTuple(PhreakTimerNode.java:230)
at
org.drools.core.phreak.PhreakTimerNode.doLeftInserts(PhreakTimerNode.java:93)
at org.drools.core.phreak.PhreakTimerNode.doNode(PhreakTimerNode.java:69)
at
org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:357)
at
org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:161)
at
org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:116)
at
org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:200)
at
org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:67)
at
org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:935)
at
org.drools.core.common.DefaultAgenda.fireUntilHalt(DefaultAgenda.java:1160)
at
org.drools.core.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:1002)
at
org.drools.core.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:978)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.fireUntilHalt(StatefulKnowledgeSessionImpl.java:273)
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10 years, 7 months
Re: [rules-dev] [rules-users] Rules don't execute using MVEL syntax in RHS - Possible Bug
by Wolfgang Laun
Repeated executions show varying results: sometimes it's OK, sometimes it isn't.
I don't think it's a race condition in your code (although proper
syncing on the map would be the "clean" way to go).
I think that salience doesn't work properly )(6.0.0, OP used 6.0.1.),
if a fact is matched unconditionally by a high salience rule and the
same fact is matched using constraints in rules with lesser priority.
(Wasn't this recognized before as a bug in 6.0.x?)
-W
On 12/05/2014, jlprat <jlprat(a)gmail.com> wrote:
> Hi,
> I updated my test code to use your way of creating the Knowledge Base
> (using
> KieBase) and I have the exact same results. Does anyone have an idea why
> this is still failing?
>
> Furthermore, I think the way I was initializing my rules is also supported
> by Drools 6, because it's almost copied line by line from the Official
> Drools API page:
> https://docs.jboss.org/drools/release/6.0.1.Final/kie-api-javadoc/
>
> /
> A Typical example to load a rule resource.
>
> KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
> kbuilder.add( ResourceFactory.newUrlResource( url ),
> ResourceType.DRL );
> if ( kbuilder.hasErrors() ) {
> System.err.println( builder.getErrors().toString() );
> }
>
> KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
> kbase.addKnowledgePackages( builder.getKnowledgePackages() );
>
> StatefulKnowledgeSession ksession =
> knowledgeBase.newStatefulKnowledgeSession();
> ksession.insert( new Fibonacci( 10 ) );
> ksession.fireAllRules();
>
> ksession.dispose();/
>
> Best,
> Josep
>
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/Rules-don-t-execute-using-MVEL-syntax-i...
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
10 years, 7 months
Build drools-eclipse with maven 3.1
by solo95
Hi,
I've tried to build drools-eclipse 6.1.0-SNAPSHOT and the tycho seems to
fail - I saw it was the 0.16.0 and I've changed it to 0.19.0 since changes
in maven makes it neccesary to use tycho 0.18.0 or later in order to work.
Is it possible to change the drools-eclipse/pom.xml line to a later version
of tycho?
(I did not find any report issiue at github site so I've posted it here...)
<version.org.eclipse.tycho>0.19.0</version.org.eclipse.tycho>
Cheers,
Mario
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10 years, 7 months
