2:49 p.m.
Problems with DSL / DSLR files when used with a KnowledgeAgent / Change Sets
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Key: JBRULES-2377
URL: https://jira.jboss.org/jira/browse/JBRULES-2377
Project: Drools
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: drools-compiler, drools-compiler (expert), drools-compiler-DSL
Affects Versions: 5.0.1.FINAL
Environment: Windows XP, Mac OS X, JDK 1.5.0_12
Reporter: Macon Pegram
Assignee: Mark Proctor
I tried to address this on the Drools Mailing list but did not receive an answer. See:
Mailing list message threads: "[rules-users] DSL, DSLR and Changesets...",
"[rules-users] Can DSL / DSLR be loaded in a changeset?"
----
Are DSL and DSLR files supported by the KnowledgeAgent / Changeset code. Here's the
details of my test case:
I have a Changeset file I'm trying to load which looks like the following:
<?xml version="1.0" encoding="UTF-8"?>
<change-set xmlns='http://drools.org/drools-5.0/change-set'
xmlns:xs='http://www.w3.org/2001/XMLSchema-instance' >
<add>
<resource source="classpath:com/test/general/" type="DSL"
/>
<resource source="classpath:com/test/general/" type="DSLR"
/>
</add>
</change-set>
There's a single DSL and a single DSLR file in this folder. I'm loading the
change set as follows:
KnowledgeAgent ka = KnowledgeAgentFactory.newKnowledgeAgent(agentName);
ka.applyChangeSet(ResourceFactory.newClassPathResource(agentName +
"-changeset.xml", getClass()));
When I run this code, the logger suggests the DSL and DSLR are being loaded and compiled:
[2009:10:299 16:10:52:info] KnowledgAgent created, with configuration:
monitorChangeSetEvents=true scanResources=true scanDirectories=true
++ Constructing and applying changeSet: dsl-test
[2009:10:299 16:10:52:info] KnowledegAgent has started listening for ChangeSet
notifications
(null: 3, 68): cvc-elt.1: Cannot find the declaration of element 'change-set'.
[2009:10:299 16:10:317:info] KnowledgAgent applying ChangeSet
[2009:10:299 16:10:317:debug] KnowledgeAgent subscribing to directory=[ClassPathResource
path='com/test/general/']
[2009:10:299 16:10:317:debug] ResourceChangeNotification subscribing
listener=org.drools.agent.impl.KnowledgeAgentImpl@b9b618 to resource=[ClassPathResource
path='com/test/general/']
[2009:10:299 16:10:317:debug] ResourceChangeScanner subcribing
notifier=org.drools.io.impl.ResourceChangeNotifierImpl@61ec49 to
resource=[ClassPathResource path='com/test/general/']
[2009:10:299 16:10:317:debug] KnowledgeAgent subscribing to directory content
resource=[FileResource
file='C:\bea\user_projects\workspaces\alerts\rules-kb\test-kb\target\test-classes\com\test\general\test.dsl']
[2009:10:299 16:10:317:debug] ResourceChangeNotification subscribing
listener=org.drools.agent.impl.KnowledgeAgentImpl@b9b618 to resource=[FileResource
file='C:\bea\user_projects\workspaces\alerts\rules-kb\test-kb\target\test-classes\com\test\general\test.dsl']
[2009:10:299 16:10:317:debug] ResourceChangeScanner subcribing
notifier=org.drools.io.impl.ResourceChangeNotifierImpl@61ec49 to resource=[FileResource
file='C:\bea\user_projects\workspaces\alerts\rules-kb\test-kb\target\test-classes\com\test\general\test.dsl']
[2009:10:299 16:10:317:debug] KnowledgeAgent subscribing to directory content
resource=[FileResource
file='C:\bea\user_projects\workspaces\alerts\rules-kb\test-kb\target\test-classes\com\test\general\test-dsl.dslr']
[2009:10:299 16:10:317:debug] ResourceChangeNotification subscribing
listener=org.drools.agent.impl.KnowledgeAgentImpl@b9b618 to resource=[FileResource
file='C:\bea\user_projects\workspaces\alerts\rules-kb\test-kb\target\test-classes\com\test\general\test-dsl.dslr']
[2009:10:299 16:10:317:debug] ResourceChangeScanner subcribing
notifier=org.drools.io.impl.ResourceChangeNotifierImpl@61ec49 to resource=[FileResource
file='C:\bea\user_projects\workspaces\alerts\rules-kb\test-kb\target\test-classes\com\test\general\test-dsl.dslr']
[2009:10:299 16:10:317:debug] KnowledgeAgent subscribing to directory=[ClassPathResource
path='com/hmc/test/general/']
[2009:10:299 16:10:317:debug] ResourceChangeNotification subscribing
listener=org.drools.agent.impl.KnowledgeAgentImpl@b9b618 to resource=[ClassPathResource
path='com/hmc/test/general/']
[2009:10:299 16:10:317:debug] KnowledgeAgent ChangeSet requires KnowledgeBuilder
[2009:10:299 16:10:317:debug] KnowledgeAgent rebuilding KnowledgeBase using ChangeSet
[2009:10:299 16:10:317:debug] KnowledgeAgent building resource=[FileResource
file='C:\bea\user_projects\workspaces\alerts\rules-kb\test-kb\target\test-classes\com\test\general\test.dsl']
[2009:10:299 16:10:333:debug] KnowledgeAgent building resource=[FileResource
file='C:\bea\user_projects\workspaces\alerts\rules-kb\test-kb\target\test-classes\com\test\general\test-dsl.dslr']
[2009:10:299 16:10:333:info] KnowledgeAgent new KnowledgeBase now built and in use
However after load is completed I try to run the following code:
System.out.println("KB Info");
Collection<KnowledgePackage> pkgs =
ka.getKnowledgeBase().getKnowledgePackages();
for (KnowledgePackage kp : pkgs) {
for (Rule rule : kp.getRules()) {
System.out.println("Rule: " + rule.getName() + ", "
+ ule.getPackageName());
for (String attribs : rule.listMetaAttributes())
System.out.println("---- " + attribs);
}
}
}
I get NO output (except of course "KB Info").
If I initialize the knowledgebase like this:
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory
.newKnowledgeBuilder();
kbuilder.add(ResourceFactory
.newClassPathResource("com/test/general/test.dsl"),
ResourceType.DSL);
kbuilder.add(ResourceFactory
.newClassPathResource("com/test/general/test-dsl.dslr"),
ResourceType.DSLR);
if (kbuilder.hasErrors()) {
throw new Exception(kbuilder.getErrors().toString());
}
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
}
... and run the same output code I get a list of the rules that were loaded.
Any clues why the different behavior?
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