4:45 a.m.
Can anyone here give me a good documentation place or thingy where I can read
about how to implement the drools 6 method of loading your rules from a
folder in the file system instead of inside the jar.
I have it working currently with the knowledgebase class, but since that is
deprecated I want to use the new classes. Although I read the drools
documentation about KieBase and such and programmatically defining your
kmodule. I did not really understand how that will help me load my rules
from a folder.
Basically what I want is that the rules located in C:\RulesFolder\rules.drl
will be loaded into my application and available within a stateless session.
Thanks.
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6 a.m.
Did you try the advice in the Documentation ?
Example 4.60 seems like the one...
KieServices kServices = KieServices.Factory.get();
KieFileSystem kfs = ks.newKieFileSystem();
kfs.write("src/main/resources/org/kie/example5/HAL5.drl", getRule());
KieBuilder kb = ks.newKieBuilder(kfs);
I don't know what getRule() is though - I think it's referring to
ResourceFactory.newClassPathResource("blahblahblah/rules/HAL5.drl")
But yeah, I think the new stuff is definitely designed for Maven named
sessions in mind, for best practice.
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6:52 a.m.
These test classes do that between them (with a bit of help from some others):
https://github.com/gratiartis/qzr/blob/master/sctrcd-drools/src/test/java...
https://github.com/gratiartis/qzr/blob/master/sctrcd-drools/src/test/java...
You will probably need to follow the path through the code to understand how that
application does it.
tl;dr - If you don’t want to do that, then below is a method for creating a KieServices
instance; after which, you need something like:
KieContainer kieContainer =
kieServices.newKieContainer(kieServices.getRepository().getDefaultReleaseId());
KieSession kieSession =
kieContainer.newKieSession(SessionConfiguration.getDefaultInstance());
private void createAndBuildKieServices(DroolsResource[] resources) throws
KieBuildException {
this.kieServices = KieServices.Factory.get();
this.kfs = newKieFileSystem();
for (DroolsResource resource : resources) {
log.info("Resource: " + resource.getType() + ", path
type="
+ resource.getPathType() + ", path=" + resource.getPath());
switch (resource.getPathType()) {
case CLASSPATH:
this.kfs.write(ResourceFactory.newClassPathResource(resource.getPath()));
break;
case FILE:
this.kfs.write(ResourceFactory.newFileResource(resource.getPath()));
break;
case URL:
UrlResource urlResource = (UrlResource) ResourceFactory
.newUrlResource(resource.getPath());
if (resource.getUsername() != null) {
log.info("Setting authentication for: " +
resource.getUsername());
urlResource.setBasicAuthentication("enabled");
urlResource.setUsername(resource.getUsername());
urlResource.setPassword(resource.getPassword());
}
this.kfs.write(urlResource);
break;
default:
throw new IllegalArgumentException(
"Unable to build this resource path type.");
}
}
KieBuilder kieBuilder = kieServices.newKieBuilder(kfs).buildAll();
if (kieBuilder.getResults().hasMessages(Level.ERROR)) {
List<Message> errors =
kieBuilder.getResults().getMessages(Level.ERROR);
StringBuilder sb = new StringBuilder("Errors:");
for (Message msg : errors) {
sb.append("\n " + prettyBuildMessage(msg));
}
throw new KieBuildException(sb.toString());
}
log.info("KieServices built: " + toString());
}
... where DroolsResource is this:
https://github.com/gratiartis/qzr/blob/master/sctrcd-drools/src/main/java...
6:43 a.m.
Thank you, That did help together with reading the documentation again I
could piece together various parts better than before, I couldn't really
make the connections as well just from reading the docs ><.
It works now :). Although I understand why the things are designed as it is,
I am not fully convinced of the usage of the Drools Workbench and might want
to have my own graphical interface for making rules.
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djb -
Leonard93 -
Stephen Masters