[rules-users] Resource Change Scanner Service modified date error

[Esteban Aliverti]

+1 to Thomas' proposal: the first step would be to change the thrown
Exception to UnsupportedOperationException. Of course this will be a
temporary change until Dean implements all the methods in the correct way
:)

Best Regards

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com


2012/1/6 Swindells, Thomas <TSwindells at nds.com>

>  As well as the message not making sense the exception should also really
> be UnsupportedOperationException, of course the preference is for someone
> to implement it and make it supported!****
>
> ** **
>
> Thomas****
>
> ** **
>
> *From:* rules-users-bounces at lists.jboss.org [mailto:
> rules-users-bounces at lists.jboss.org] *On Behalf Of *Esteban Aliverti
> *Sent:* 06 January 2012 09:14
> *To:* Rules Users List
> *Subject:* Re: [rules-users] Resource Change Scanner Service modified
> date error****
>
> ** **
>
> Could you please share with us how are you adding your resources to the
> agent? According to what you are saying I assume you are using a
> ReaderResource. According to Drools code, ReaderResource doesn't support
> most of org.drools.io.internal.InternalResource methods. Some of these
> methods (i.e. getLastModified()) are used by ResourceScanner to check if a
> resource has actually changed.****
>
> So if we take a look at ReaderResource.getLastModified() we will see this:
> ****
>
> ** **
>
> public long getLastModified() {****
>
>     throw new IllegalStateException( "reader does have a modified date" );
> ****
>
> } ****
>
> ** **
>
> You can find the whole source code here:
> https://github.com/droolsjbpm/drools/blob/master/drools-core/src/main/java/org/drools/io/impl/ReaderResource.java
> ****
>
> ** **
>
> So, don't expect this to work :)****
>
> ** **
>
> There are 2 things you can do:****
>
>    1. Submit a patch for ReaderResource.java implementing all the
>    unimplemented methods :) ****
>    2. Use a different Resource like UrlResource, FileResource,
>    InputStreamResource, etc. ****
>
>  In my opinion, Bug 733008 must be reopened until someone (maybe you
> Dean) provides a correct implementation of ReaderResource. ****
>
> ** **
>
> Best Regards,****
>
>
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>
> Esteban Aliverti
> - Developer @ http://www.plugtree.com
> - Blog @ http://ilesteban.wordpress.com
>
> ****
>
> On Fri, Jan 6, 2012 at 8:53 AM, Dean <dean at qualica.com> wrote:****
>
> I'm pretty sure this issue is the same as Bug 733008
> (https://bugzilla.redhat.com/show_bug.cgi?id=733008).
>
> I have updated the class from Bug 733008 to reproduce the bug in Drools
> 5.4.0.Beta1:
>
> http://drools.46999.n3.nabble.com/file/n3637279/AgentTest.java
> AgentTest.java
>
> It doesn't seem to be possible to scan a resource for changes at all. Even
> if I execute ResourceFactory.getResourceChangeScannerService().scan();
> directly, I get the same error message:
>
> [2012-01-06 09:47:57,144:exception]****
>
> java.lang.IllegalStateException: reader does have a modified date****
>
>        at
> org.drools.io.impl.ReaderResource.getLastModified(ReaderResource.java:64)
>        at
>
> org.drools.io.impl.ResourceChangeScannerImpl.scan(ResourceChangeScannerImpl.java:166)
>        at
>
> org.drools.io.impl.ResourceChangeScannerImpl$ProcessChangeSet.run(ResourceChangeScannerImpl.java:311)
>        at java.lang.Thread.run(Thread.java:662)
>
> (As a side note the error message should probably read: reader does /not/
> have a modified date)
>
> Regards
>
> Dean
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/Resource-Change-Scanner-Service-modified-date-error-tp3634802p3637279.html
> ****
>
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users****
>
> ** **
>
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