Great news :)<br><br>Please do feedback... if you get it working I'll make a blog entry on your behalf as you are not the first (or last) to try Drools on Android.<br><br>With kind regards,<br><br>Mike<br><br><div class="gmail_quote">
2011/6/9 Abhay B. Chaware <span dir="ltr"><<a href="mailto:Abhay.Chaware@kpitcummins.com">Abhay.Chaware@kpitcummins.com</a>></span><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div link="blue" vlink="blue" lang="EN-US">
<div>
<div>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">That’s exactly what I am trying out at the moment .. option –
b. Pre-compile, serialize and unserialize …I’ll share the results.</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Also rule file’s
there at the location mentioned. So that’s not a problem.</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">I’ve gone
through the blog you mentioned … and as you indicated, it’s only
jbpm .. no rules …</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">thanks</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">abhay</span></font></p>
</div>
<div>
<div class="MsoNormal" style="text-align: center;" align="center"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">
<hr size="2" width="100%" align="center">
</span></font></div>
<p class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;">
<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>
[mailto:<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>] <b><span style="font-weight: bold;">On
Behalf Of </span></b>Michael Anstis<br>
<b><span style="font-weight: bold;">Sent:</span></b> Thursday, June 09, 2011 4:07
PM<div><div></div><div class="h5"><br>
<b><span style="font-weight: bold;">To:</span></b> Rules
Users List<br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [rules-users] Drools
in non-eclipse environment</div></div></span></font></p>
</div><div><div></div><div class="h5">
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Preparing to be shouted
down, but isn't it impossible to compile DRL on Android and the suggestion is
to load pre-serialised KnowledgeBases?<br>
<br>
Also, as another observation, are you sure the DRL was indeed found and the NPE
is not caused by "com.ts.DBconnector.readKnowledgeBase(DBconnector.java:143)"
perhaps passing a null to KnowledgeBuilder?<br>
<br>
Have you looked at <a href="http://blog.athico.com/2011/03/jbpm5-lightweight-running-on-android.html" target="_blank">http://blog.athico.com/2011/03/jbpm5-lightweight-running-on-android.html</a>,
which might give some pointers - although it is only jBPM and not rules
themselves.<br>
<br>
With kind regards,<br>
<br>
Mike</span></font></p>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">On 9 June 2011 11:11, Abhay B. Chaware <<a href="mailto:Abhay.Chaware@kpitcummins.com" target="_blank">Abhay.Chaware@kpitcummins.com</a>>
wrote:</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">This is what I did.<br>
<br>
Properties properties =
new Properties();<br>
properties.put("drools.dialect.java.compiler",
"JANINO");<br>
KnowledgeBuilderConfiguration kbConfig =
KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration( properties,
(ClassLoader[]) null );<br>
KnowledgeBuilder
kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(kbConfig);</span></font></p>
<div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">
kbuilder.add(ResourceFactory.newInputStreamResource(is),
ResourceType.DRL);<br>
<br>
</span></font></p>
</div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">I am getting same error with KnowledgeBuilderConfiguration ..<br>
<br>
W/System.err(27303): java.lang.NullPointerException<br>
W/System.err(27303): at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:47)<br>
W/System.err(27303): at
org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1161)<br>
W/System.err(27303): at
org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:637)<br>
W/System.err(27303): at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:267)<br>
W/System.err(27303): at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:459)<br>
W/System.err(27303): at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)<br>
W/System.err(27303): at
com.ts.DBconnector.readKnowledgeBase(DBconnector.java:143)<br>
W/System.err(27303): at
com.first.FirstActivity.onCreate(FirstActivity.java:64)<br>
W/System.err(27303): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)<br>
W/System.err(27303): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)<br>
W/System.err(27303): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)<br>
W/System.err(27303): at
android.app.ActivityThread.access$2300(ActivityThread.java:125)<br>
<br>
<br>
________________________________________<br>
From: <a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>
[<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>]
On Behalf Of Wolfgang Laun [<a href="mailto:wolfgang.laun@gmail.com" target="_blank">wolfgang.laun@gmail.com</a>]<br>
Sent: Thursday, June 09, 2011 2:46 PM</span></font></p>
<div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">To: Rules Users List<br>
Subject: Re: [rules-users] Drools in non-eclipse environment</span></font></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">You might try this:<br>
<br>
Properties props = new Properties();<br>
props.put( "drools.dialect.java.compiler",
"JANINO" );<br>
<br>
KnowledgeBuilderConfiguration kbConfig =<br>
KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration( props,
(ClassLoader[]) null );<br>
<br>
Requires the janino jar in your classpath, which I have as<br>
~/.m2/repository/janino/janino/2.5.15/janino-2.5.15.jar<br>
<br>
-W</span></font></p>
</div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">On 9 June 2011 10:29, Abhay B. Chaware <<a href="mailto:Abhay.Chaware@kpitcummins.com" target="_blank">Abhay.Chaware@kpitcummins.com</a><mailto:<a href="mailto:Abhay.Chaware@kpitcummins.com" target="_blank">Abhay.Chaware@kpitcummins.com</a>>>
wrote:<br>
I am using drools 5.1.0<br>
<br>
Let me explain what I am trying to do. I am trying to write a drools app
on to android platform. In my app, I have added following jars in the
application classpath -<br>
<br>
antlr-runtime.jar<br>
drools-api.jar<br>
drools-compiler.jar<br>
drools-core.jar<br>
mvel2.jar<br>
<br>
Do I need any other jar files ?<br>
<br>
upon drilling down into the Null Pointer Exception, it appears that it is throwing
NPE at following line inside RuleBuilder.java<br>
<br>
<br>
RuleConditionBuilder builder =
(RuleConditionBuilder)context.getDialect().getBuilder(ruleDescr.getLhs().getClass());<br>
<br>
and on further drilling, I found that "context.getDialect()" is
retuning NULL.<br>
<br>
Then I put some debug inside PackageBuilder.java<br>
<br>
upon drilling down for the error, found out that it is not able to set the
context's dialect.<br>
ctr.getDialect(pkgRegistry.getDialect()) gives "null" ...<br>
<br>
DialectCompiletimeRegistry ctr = pkgRegistry.getDialectCompiletimeRegistry();<br>
RuleBuildContext context = new RuleBuildContext(this, ruleDescr, ctr, pkg,
ctr.getDialect(pkgRegistry.getDialect()));<br>
<br>
Is there any default setting /configuration that I am obviously missing ?<br>
<br>
what could be the problem ?<br>
<br>
-abhay<br>
<br>
<br>
________________________________________</span></font></p>
</div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">From: <a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a><mailto:<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>>
[<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a><mailto:<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>>]
On Behalf Of Swindells, Thomas [<a href="mailto:TSwindells@nds.com" target="_blank">TSwindells@nds.com</a><mailto:<a href="mailto:TSwindells@nds.com" target="_blank">TSwindells@nds.com</a>>]</span></font></p>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Sent: Thursday, June 09, 2011 1:40 PM<br>
To: Rules Users List<br>
Subject: Re: [rules-users] Drools in non-eclipse environment<br>
<br>
Which version of drools is this?<br>
For drools 5.0.1 we just use maven to resolve the dependencies for us and it
works fine. I can't obviously see any eclipse compiler in the jars that we
distribute with our application.<br>
<br>
Thomas<br>
<br>
> -----Original Message-----</span></font></p>
</div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">> From: <a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a><mailto:<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>>
[mailto:<a href="mailto:rules-users-" target="_blank">rules-users-</a><mailto:<a href="mailto:rules-users-" target="_blank">rules-users-</a>><br>
> <a href="mailto:bounces@lists.jboss.org" target="_blank">bounces@lists.jboss.org</a><mailto:<a href="mailto:bounces@lists.jboss.org" target="_blank">bounces@lists.jboss.org</a>>] On
Behalf Of Abhay B. Chaware</span></font></p>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">> Sent: 09 June 2011 08:06</span></font></p>
</div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">> To: <a href="mailto:rules-users@lists.jboss.org" target="_blank">rules-users@lists.jboss.org</a><mailto:<a href="mailto:rules-users@lists.jboss.org" target="_blank">rules-users@lists.jboss.org</a>></span></font></p>
<div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">> Subject: [rules-users] Drools in non-eclipse environment<br>
><br>
> Has anyone tried using drools in non-eclipse env ? meaning that<br>
> org.eclipse.jdt.core_3.5.1.v_972_R35x.jar is not in the classpath ?<br>
><br>
> Documentation says this :<br>
><br>
> (<a href="http://docs.huihoo.com/drools/4.0.7/ch02s05.html" target="_blank">http://docs.huihoo.com/drools/4.0.7/ch02s05.html</a>)<br>
><br>
> if you do not have Eclipse JDT Core in your classpath you must override
the<br>
> compiler setting before you instantiate this PackageBuilder, you can
either<br>
> do that with a packagebuilder properties file the ChainedProperties class
will<br>
> find, or you can do it programmatically as shown below; note this time I
use<br>
> properties to inject the value for startup.<br>
><br>
> They also provide an example, but I am not able to figure out exactly how
to<br>
> use this example/info.<br>
><br>
> Here is my code :<br>
><br>
> KnowledgeBuilder kbuilder
=<br>
> KnowledgeBuilderFactory.newKnowledgeBuilder();<br>
>
kbuilder.add(ResourceFactory.newInputStreamResource(is),<br>
> ResourceType.DRL);<br>
><br>
> where "is" is input stream containing the rule file ( .drl)<br>
><br>
> How do I override the compiler setting ?<br>
><br>
> I am getting a null pointer exception ( see below ) and I suspect that<br>
> overriding the packagebuilderconfiguration will fix it ?<br>
><br>
> W/System.err(25511): java.lang.NullPointerException<br>
> W/System.err(25511): at<br>
> org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:47)<br>
> W/System.err(25511): at<br>
> org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1161)<br>
> W/System.err(25511): at<br>
> org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:637)<br>
> W/System.err(25511): at<br>
> org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java<br>
> :267)<br>
> W/System.err(25511): at<br>
> org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder<br>
> .java:459)<br>
> W/System.err(25511): at<br>
> org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.ja<br>
> va:28)<br>
> W/System.err(25511): at<br>
> com.ts.DBconnector.readKnowledgeBase(DBconnector.java:146)<br>
><br>
><br>
><br>
> _______________________________________________<br>
> rules-users mailing list</span></font></p>
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