2:18 p.m.
Newbie here,
How do I access the rules in mortgage/test in sample versus having the rule
included in a .drl file?
Guvnor is up and running in tomcat.
Thanks for your help.
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9:34 a.m.
Your best option would be to use a change-set.
There is such an example, using the mortgages-sample repository in
/guvnor/guvnor-examples.
You could also use the REST API to retrieve rules, but for now the above
should give you a starting point.
With kind regards,
Mike
On 12 September 2012 20:18, richard <rx74me(a)yahoo.com> wrote:
Newbie here,
How do I access the rules in mortgage/test in sample versus having the rule
included in a .drl file?
Guvnor is up and running in tomcat.
Thanks for your help.
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2:52 p.m.
I am able to get a list of the rules from the mortgage in the database, but
how do I set up the java when I fire the rules, to get them to execute the
underage rule?
Viewing source for: Underage
1. | rule "Underage"
2. | salience 10
3. | dialect "mvel"
4. | when
5. | application : LoanApplication( )
6. | Applicant( age < "21" )
7. | then
8. | application.setApproved( false );
9. | application.setExplanation( "Underage" );
10. | retract( application );
11. | end
I assume I need an application class and Applicant class, but where does
LoanApplicatiion come from.
I do not see it anywhere in the examples in the docs?
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2:58 p.m.
The fact types/classes are declarative. Look in the model definition in
Guvnor.
When you come to use your own classes you will need to upload the JAR to
Guvnor as a new JAR model and also include in your client classpath. Models
uploaded to Guvnor only serve to drive the UI and are not included in the
"rule package" the change set downloads from Guvnor.
This will make mire sense when you get to that stage, but please feel free
to drop by when you get there.
sent on the move
On 13 Sep 2012 20:53, "richard" <rx74me(a)yahoo.com> wrote:
I am able to get a list of the rules from the mortgage in the
database, but
how do I set up the java when I fire the rules, to get them to execute the
underage rule?
Viewing source for: Underage
1. | rule "Underage"
2. | salience 10
3. | dialect "mvel"
4. | when
5. | application : LoanApplication( )
6. | Applicant( age < "21" )
7. | then
8. | application.setApproved( false );
9. | application.setExplanation( "Underage" );
10. | retract( application );
11. | end
I assume I need an application class and Applicant class, but where does
LoanApplicatiion come from.
I do not see it anywhere in the examples in the docs?
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3:56 p.m.
I guess I don't understand, I am able to pull the rules from the db.
I can see how the helloworld example works because i see stuff being used in
sample.drl.
Dummy rule : mortgages : RULE
Underage : mortgages : RULE
Bankruptcy history : mortgages : RULE
No bad credit checks : mortgages : RULE
no NINJAs : mortgages : RULE
Row 3 Pricing loans : mortgages : RULE
Row 1 Pricing loans : mortgages : RULE
Row 2 Pricing loans : mortgages : RULE
CreditApproval : mortgages : RULE
RegexDslRule : mortgages : RULE
using the changeset.xml
and using this loop
for( KnowledgePackage kpkg : kbase.getKnowledgePackages() ) {
Collection<Rule> rules = new ArrayList<Rule>( kpkg.getRules() );
for( Rule rule : rules ) {
System.out.println( rule.getName().toString() + " : " +
rule.getPackageName().toString() + " : " +
rule.getKnowledgeType().toString());
}
}
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4:18 p.m.
Did you look at the model in Guvnor and the Guvnor example I referenced?
If things still aren't clear pop by to #guvnor on IRC tomorrow (9:00 GMT
onwards) and it will be easier to talk you through your problems.
sent on the move
On 13 Sep 2012 21:57, "richard" <rx74me(a)yahoo.com> wrote:
I guess I don't understand, I am able to pull the rules from the
db.
I can see how the helloworld example works because i see stuff being used
in
sample.drl.
Dummy rule : mortgages : RULE
Underage : mortgages : RULE
Bankruptcy history : mortgages : RULE
No bad credit checks : mortgages : RULE
no NINJAs : mortgages : RULE
Row 3 Pricing loans : mortgages : RULE
Row 1 Pricing loans : mortgages : RULE
Row 2 Pricing loans : mortgages : RULE
CreditApproval : mortgages : RULE
RegexDslRule : mortgages : RULE
using the changeset.xml
and using this loop
for( KnowledgePackage kpkg : kbase.getKnowledgePackages() ) {
Collection<Rule> rules = new ArrayList<Rule>( kpkg.getRules()
);
for( Rule rule : rules ) {
System.out.println( rule.getName().toString() + " : " +
rule.getPackageName().toString() + " : " +
rule.getKnowledgeType().toString());
}
}
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9:26 a.m.
I assume you mean the mortgageApplicationTest.java.
I have looked at the models, so I see the fact types in the model.
But when I try to run mortgageApplicationTest.java
I am getting:
Exception in thread "main" java.lang.NullPointerException
at java.util.Properties$LineReader.readLine(Properties.java:418)
at java.util.Properties.load0(Properties.java:337)
at java.util.Properties.load(Properties.java:325)
at org.drools.agent.RuleAgent.loadFromProperties(RuleAgent.java:299)
at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:256)
at
com.notidiots.MortgageApplicationTest.main(MortgageApplicationTest.java:17)
which is this line.
RuleAgent agent = RuleAgent.newRuleAgent("mortgageapproval.properties");
I have not made any modifications to this file.
Thanks.
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10:10 a.m.
I mean
guvnor/guvnor-examples/src/main/java/org/drools/guvnor/examples/mortgage/client/MortgageClientExample.java
This does not use a properties file (that the below implies), just a
Change-set. Furthermore "RuleAgent" sounds very old... what version of
Drools Guvnor are you using?
Normally, if running from an IDE (like Eclipse) the src/main/resources
folder is excluded from the build path. Check that it is not being excluded
with an exclusion pattern of **.
With kind regards,
Mike
On 14 September 2012 15:26, richard <rx74me(a)yahoo.com> wrote:
I assume you mean the mortgageApplicationTest.java.
I have looked at the models, so I see the fact types in the model.
But when I try to run mortgageApplicationTest.java
I am getting:
Exception in thread "main" java.lang.NullPointerException
at java.util.Properties$LineReader.readLine(Properties.java:418)
at java.util.Properties.load0(Properties.java:337)
at java.util.Properties.load(Properties.java:325)
at
org.drools.agent.RuleAgent.loadFromProperties(RuleAgent.java:299)
at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:256)
at
com.notidiots.MortgageApplicationTest.main(MortgageApplicationTest.java:17)
which is this line.
RuleAgent agent = RuleAgent.newRuleAgent("mortgageapproval.properties");
I have not made any modifications to this file.
Thanks.
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10:56 a.m.
Guvnor - Version 5.4.0.Final
\drools-examples\drools-examples-brms\mortgage-example
I get this error.
java.lang.RuntimeException: KnowledgeAgent exception while trying to
deserialize KnowledgeDefinitionsPackage
at
org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:776)
at
org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1071)
at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:824)
at
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:203)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:182)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.readKnowledgeBase(MortgageClientExample.java:92)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.main(MortgageClientExample.java:49)
Caused by: java.io.FileNotFoundException:
http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/mortgages/L...
at
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1434)
at org.drools.io.impl.UrlResource.grabStream(UrlResource.java:210)
at org.drools.io.impl.UrlResource.getInputStream(UrlResource.java:146)
at
org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:748)
... 7 more
Exception in thread "main" java.lang.NullPointerException
at java.util.AbstractCollection.addAll(AbstractCollection.java:303)
at
org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1077)
at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:824)
at
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:203)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:182)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.readKnowledgeBase(MortgageClientExample.java:92)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.main(MortgageClientExample.java:49)
/*
* Copyright 2011 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.guvnor.examples.mortgage.client;
import javax.swing.JOptionPane;
import org.drools.KnowledgeBase;
import org.drools.agent.KnowledgeAgent;
import org.drools.agent.KnowledgeAgentFactory;
import org.drools.definition.type.FactType;
import org.drools.io.Resource;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
public class MortgageClientExample {
/**
* Entry point demonstrating use of KnowledgeAgent and changesets
retrieving
* a rule package from a running instance of Guvnor.
* @param args
*/
public static void main(String[] args) {
JOptionPane.showMessageDialog(null, "This example makes a few
assumptions:\n" +
"- Start the app server on localhost on port 8080.\n" +
"- Rename the guvnor war to guvnor.war and deploy it to the
app server.\n" +
"- Surf to Guvnor and log in.\n" +
"- In the menu Administration, Import/Export, import
/exported-repositories/mortgage-sample-repository.xml\n" +
"- Refresh the browser, open menu Package, click Rebuild all
packages.\n" +
"Click OK when this is done.", "Preparation",
JOptionPane.INFORMATION_MESSAGE);
StatefulKnowledgeSession ksession = null;
try {
// load up the knowledge base
KnowledgeBase kbase = readKnowledgeBase();
// Dynamic fact creation as the model was declared in the DRL
FactType appType = kbase.getFactType("mortgages",
"LoanApplication");
Object application = appType.newInstance();
appType.set(application, "amount", 25000);
appType.set(application, "deposit", 1500);
appType.set(application, "lengthYears", 20);
FactType incomeType = kbase.getFactType("mortgages",
"IncomeSource");
Object income = incomeType.newInstance();
incomeType.set(income, "type", "Job");
incomeType.set(income, "amount", 65000);
// Invoke the magic
ksession = kbase.newStatefulKnowledgeSession();
ksession.insert(application);
ksession.insert(income);
ksession.fireAllRules();
// Voila!
String message = "The loan application is now:\n" + application;
System.out.println(message);
JOptionPane.showMessageDialog(null, message, "Result",
JOptionPane.INFORMATION_MESSAGE);
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} finally {
if (ksession != null) {
ksession.dispose();
}
}
}
/**
* Load KnowledgeBase using KnowledgeAgent configured with accompanying
changeset xml
* @return A KnowledgeBase
*/
private static KnowledgeBase readKnowledgeBase() {
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent("MortgageAgent");
Resource changeset = ResourceFactory.newClassPathResource(
"org/drools/guvnor/examples/mortgage/mortgage-changeset.xml");
kagent.applyChangeSet(changeset);
KnowledgeBase kbase = kagent.getKnowledgeBase();
kagent.dispose();
return kbase;
}
}
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11:48 a.m.
I assume:-
1) You changed the URL in the change-set to suit where your Guvnor is
running?
The stack trace suggests
http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/mortgages/L...
not be found.
2) You built the mortgages package in Guvnor?
I've been running this very same example numerous times in the past few
days, both on Tomcat and JBoss AS7.1.1 so am confident it works.
On 14 September 2012 16:56, richard <rx74me(a)yahoo.com> wrote:
Guvnor - Version 5.4.0.Final
\drools-examples\drools-examples-brms\mortgage-example
I get this error.
java.lang.RuntimeException: KnowledgeAgent exception while trying to
deserialize KnowledgeDefinitionsPackage
at
org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:776)
at
org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1071)
at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:824)
at
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:203)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:182)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.readKnowledgeBase(MortgageClientExample.java:92)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.main(MortgageClientExample.java:49)
Caused by: java.io.FileNotFoundException:
http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/mortgages/L...
at
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1434)
at org.drools.io.impl.UrlResource.grabStream(UrlResource.java:210)
at
org.drools.io.impl.UrlResource.getInputStream(UrlResource.java:146)
at
org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:748)
... 7 more
Exception in thread "main" java.lang.NullPointerException
at java.util.AbstractCollection.addAll(AbstractCollection.java:303)
at
org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1077)
at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:824)
at
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:203)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:182)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.readKnowledgeBase(MortgageClientExample.java:92)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.main(MortgageClientExample.java:49)
/*
* Copyright 2011 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.guvnor.examples.mortgage.client;
import javax.swing.JOptionPane;
import org.drools.KnowledgeBase;
import org.drools.agent.KnowledgeAgent;
import org.drools.agent.KnowledgeAgentFactory;
import org.drools.definition.type.FactType;
import org.drools.io.Resource;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
public class MortgageClientExample {
/**
* Entry point demonstrating use of KnowledgeAgent and changesets
retrieving
* a rule package from a running instance of Guvnor.
* @param args
*/
public static void main(String[] args) {
JOptionPane.showMessageDialog(null, "This example makes a few
assumptions:\n" +
"- Start the app server on localhost on port 8080.\n" +
"- Rename the guvnor war to guvnor.war and deploy it to the
app server.\n" +
"- Surf to Guvnor and log in.\n" +
"- In the menu Administration, Import/Export, import
/exported-repositories/mortgage-sample-repository.xml\n" +
"- Refresh the browser, open menu Package, click Rebuild
all
packages.\n" +
"Click OK when this is done.", "Preparation",
JOptionPane.INFORMATION_MESSAGE);
StatefulKnowledgeSession ksession = null;
try {
// load up the knowledge base
KnowledgeBase kbase = readKnowledgeBase();
// Dynamic fact creation as the model was declared in the DRL
FactType appType = kbase.getFactType("mortgages",
"LoanApplication");
Object application = appType.newInstance();
appType.set(application, "amount", 25000);
appType.set(application, "deposit", 1500);
appType.set(application, "lengthYears", 20);
FactType incomeType = kbase.getFactType("mortgages",
"IncomeSource");
Object income = incomeType.newInstance();
incomeType.set(income, "type", "Job");
incomeType.set(income, "amount", 65000);
// Invoke the magic
ksession = kbase.newStatefulKnowledgeSession();
ksession.insert(application);
ksession.insert(income);
ksession.fireAllRules();
// Voila!
String message = "The loan application is now:\n" +
application;
System.out.println(message);
JOptionPane.showMessageDialog(null, message, "Result",
JOptionPane.INFORMATION_MESSAGE);
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} finally {
if (ksession != null) {
ksession.dispose();
}
}
}
/**
* Load KnowledgeBase using KnowledgeAgent configured with accompanying
changeset xml
* @return A KnowledgeBase
*/
private static KnowledgeBase readKnowledgeBase() {
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent("MortgageAgent");
Resource changeset = ResourceFactory.newClassPathResource(
"org/drools/guvnor/examples/mortgage/mortgage-changeset.xml");
kagent.applyChangeSet(changeset);
KnowledgeBase kbase = kagent.getKnowledgeBase();
kagent.dispose();
return kbase;
}
}
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11:59 a.m.
I updated my post.
Exception in thread "main" java.lang.NoSuchMethodError:
org.drools.util.CompositeClassLoader.clone()Lorg/drools/util/CompositeClassLoader;
at org.drools.RuleBaseConfiguration.getClassLoader(RuleBaseConfiguration.java:886)
at org.drools.common.AbstractRuleBase.<init>(AbstractRuleBase.java:164)
at org.drools.reteoo.ReteooRuleBase.<init>(ReteooRuleBase.java:151)
at org.drools.reteoo.ReteooRuleBase.<init>(ReteooRuleBase.java:128)
at org.drools.RuleBaseFactory.newRuleBase(RuleBaseFactory.java:86)
at org.drools.RuleBaseFactory.newRuleBase(RuleBaseFactory.java:74)
at org.drools.RuleBaseFactory.newRuleBase(RuleBaseFactory.java:37)
at
org.drools.impl.KnowledgeBaseFactoryServiceImpl.newKnowledgeBase(KnowledgeBaseFactoryServiceImpl.java:49)
at org.drools.KnowledgeBaseFactory.newKnowledgeBase(KnowledgeBaseFactory.java:63)
at
org.drools.agent.KnowledgeAgentFactory.newKnowledgeAgent(KnowledgeAgentFactory.java:138)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.readKnowledgeBase(MortgageClientExample.java:89)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.main(MortgageClientExample.java:49)
________________________________
From: Michael Anstis <michael.anstis(a)gmail.com>
To: Rules Users List <rules-users(a)lists.jboss.org>
Sent: Friday, September 14, 2012 11:48 AM
Subject: Re: [rules-users] Guvnor example how to access rules in database instead
sample.drl file?
I assume:-
1) You changed the URL in the change-set to suit where your Guvnor is running?
The stack trace suggests
http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/mortgages/L... could not
be found.
2) You built the mortgages package in Guvnor?
I've been running this very same example numerous times in the past few days, both on
Tomcat and JBoss AS7.1.1 so am confident it works.
On 14 September 2012 16:56, richard <rx74me(a)yahoo.com> wrote:
Guvnor - Version 5.4.0.Final
\drools-examples\drools-examples-brms\mortgage-example
I get this error.
java.lang.RuntimeException: KnowledgeAgent exception while trying to
deserialize KnowledgeDefinitionsPackage
at
org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:776)
at
org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1071)
at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:824)
at
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:203)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:182)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.readKnowledgeBase(MortgageClientExample.java:92)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.main(MortgageClientExample.java:49)
Caused by: java.io.FileNotFoundException:
http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/mortgages/L...
at
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1434)
at org.drools.io.impl.UrlResource.grabStream(UrlResource.java:210)
at org.drools.io.impl.UrlResource.getInputStream(UrlResource.java:146)
at
org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:748)
... 7 more
Exception in thread "main" java.lang.NullPointerException
at java.util.AbstractCollection.addAll(AbstractCollection.java:303)
at
org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1077)
at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:824)
at
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:203)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:182)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.readKnowledgeBase(MortgageClientExample.java:92)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.main(MortgageClientExample.java:49)
/*
* Copyright 2011 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.guvnor.examples.mortgage.client;
import javax.swing.JOptionPane;
import org.drools.KnowledgeBase;
import org.drools.agent.KnowledgeAgent;
import org.drools.agent.KnowledgeAgentFactory;
import org.drools.definition.type.FactType;
import org.drools.io.Resource;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
public class MortgageClientExample {
/**
* Entry point demonstrating use of KnowledgeAgent and changesets
retrieving
* a rule package from a running instance of Guvnor.
* @param args
*/
public static void main(String[] args) {
JOptionPane.showMessageDialog(null, "This example makes a few
assumptions:\n" +
"- Start the app server on localhost on port 8080.\n" +
"- Rename the guvnor war to guvnor.war and deploy it to the
app server.\n" +
"- Surf to Guvnor and log in.\n" +
"- In the menu Administration, Import/Export, import
/exported-repositories/mortgage-sample-repository.xml\n" +
"- Refresh the browser, open menu Package, click Rebuild all
packages.\n" +
"Click OK when this is done.", "Preparation",
JOptionPane.INFORMATION_MESSAGE);
StatefulKnowledgeSession ksession = null;
try {
// load up the knowledge base
KnowledgeBase kbase = readKnowledgeBase();
// Dynamic fact creation as the model was declared in the DRL
FactType appType = kbase.getFactType("mortgages",
"LoanApplication");
Object application = appType.newInstance();
appType.set(application, "amount", 25000);
appType.set(application, "deposit", 1500);
appType.set(application, "lengthYears", 20);
FactType incomeType = kbase.getFactType("mortgages",
"IncomeSource");
Object income = incomeType.newInstance();
incomeType.set(income, "type", "Job");
incomeType.set(income, "amount", 65000);
// Invoke the magic
ksession = kbase.newStatefulKnowledgeSession();
ksession.insert(application);
ksession.insert(income);
ksession.fireAllRules();
// Voila!
String message = "The loan application is now:\n" + application;
System.out.println(message);
JOptionPane.showMessageDialog(null, message, "Result",
JOptionPane.INFORMATION_MESSAGE);
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} finally {
if (ksession != null) {
ksession.dispose();
}
}
}
/**
* Load KnowledgeBase using KnowledgeAgent configured with accompanying
changeset xml
* @return A KnowledgeBase
*/
private static KnowledgeBase readKnowledgeBase() {
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent("MortgageAgent");
Resource changeset = ResourceFactory.newClassPathResource(
"org/drools/guvnor/examples/mortgage/mortgage-changeset.xml");
kagent.applyChangeSet(changeset);
KnowledgeBase kbase = kagent.getKnowledgeBase();
kagent.dispose();
return kbase;
}
}
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12:01 p.m.
Michael,
I had edited post,
I get this error now
Exception in thread "main" java.lang.NoSuchMethodError:
org.drools.util.CompositeClassLoader.clone()Lorg/drools/util/CompositeClassLoader;
at
org.drools.RuleBaseConfiguration.getClassLoader(RuleBaseConfiguration.java:886)
at org.drools.common.AbstractRuleBase.<init>(AbstractRuleBase.java:164)
at org.drools.reteoo.ReteooRuleBase.<init>(ReteooRuleBase.java:151)
at org.drools.reteoo.ReteooRuleBase.<init>(ReteooRuleBase.java:128)
at org.drools.RuleBaseFactory.newRuleBase(RuleBaseFactory.java:86)
at org.drools.RuleBaseFactory.newRuleBase(RuleBaseFactory.java:74)
at org.drools.RuleBaseFactory.newRuleBase(RuleBaseFactory.java:37)
at
org.drools.impl.KnowledgeBaseFactoryServiceImpl.newKnowledgeBase(KnowledgeBaseFactoryServiceImpl.java:49)
at
org.drools.KnowledgeBaseFactory.newKnowledgeBase(KnowledgeBaseFactory.java:63)
at
org.drools.agent.KnowledgeAgentFactory.newKnowledgeAgent(KnowledgeAgentFactory.java:138)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.readKnowledgeBase(MortgageClientExample.java:89)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.main(MortgageClientExample.java:49)
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2:38 p.m.
I think I am running the correct example.
I am using eclipse, so maybe i have it set up wrong?
Any clues?
Exception in thread "main" org.drools.ProviderInitializationException:
Provider org.drools.impl.KnowledgeBaseProviderImpl could not be set.
at
org.drools.KnowledgeBaseFactory.loadProvider(KnowledgeBaseFactory.java:126)
at
org.drools.KnowledgeBaseFactory.getKnowledgeBaseProvider(KnowledgeBaseFactory.java:114)
at
org.drools.KnowledgeBaseFactory.newKnowledgeBase(KnowledgeBaseFactory.java:46)
at
org.drools.agent.KnowledgeAgentFactory.newKnowledgeAgent(KnowledgeAgentFactory.java:94)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.readKnowledgeBase(MortgageClientExample.java:89)
at
org.drools.guvnor.examples.mortgage.client.MortgageClientExample.main(MortgageClientExample.java:49)
Caused by: java.lang.ClassNotFoundException:
org.drools.impl.KnowledgeBaseProviderImpl
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at
org.drools.KnowledgeBaseFactory.loadProvider(KnowledgeBaseFactory.java:123)
... 5 more
/*
* Copyright 2011 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.guvnor.examples.mortgage.client;
import javax.swing.JOptionPane;
import org.drools.KnowledgeBase;
import org.drools.agent.KnowledgeAgent;
import org.drools.agent.KnowledgeAgentFactory;
import org.drools.definition.type.FactType;
import org.drools.io.Resource;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
public class MortgageClientExample {
/**
* Entry point demonstrating use of KnowledgeAgent and changesets
retrieving
* a rule package from a running instance of Guvnor.
* @param args
*/
public static void main(String[] args) {
JOptionPane.showMessageDialog(null, "This example makes a few
assumptions:\n" +
"- Start the app server on localhost on port 8080.\n" +
"- Rename the guvnor war to guvnor.war and deploy it to the
app server.\n" +
"- Surf to Guvnor and log in.\n" +
"- In the menu Administration, Import/Export, import
/exported-repositories/mortgage-sample-repository.xml\n" +
"- Refresh the browser, open menu Package, click Rebuild all
packages.\n" +
"Click OK when this is done.", "Preparation",
JOptionPane.INFORMATION_MESSAGE);
StatefulKnowledgeSession ksession = null;
try {
// load up the knowledge base
KnowledgeBase kbase = readKnowledgeBase();
// Dynamic fact creation as the model was declared in the DRL
FactType appType = kbase.getFactType("mortgages",
"LoanApplication");
Object application = appType.newInstance();
appType.set(application, "amount", 25000);
appType.set(application, "deposit", 1500);
appType.set(application, "lengthYears", 20);
FactType incomeType = kbase.getFactType("mortgages",
"IncomeSource");
Object income = incomeType.newInstance();
incomeType.set(income, "type", "Job");
incomeType.set(income, "amount", 65000);
// Invoke the magic
ksession = kbase.newStatefulKnowledgeSession();
ksession.insert(application);
ksession.insert(income);
ksession.fireAllRules();
// Voila!
String message = "The loan application is now:\n" + application;
System.out.println(message);
JOptionPane.showMessageDialog(null, message, "Result",
JOptionPane.INFORMATION_MESSAGE);
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} finally {
if (ksession != null) {
ksession.dispose();
}
}
}
/**
* Load KnowledgeBase using KnowledgeAgent configured with accompanying
changeset xml
* @return A KnowledgeBase
*/
private static KnowledgeBase readKnowledgeBase() {
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent("MortgageAgent");
Resource changeset = ResourceFactory.newClassPathResource(
"org/drools/guvnor/examples/mortgage/mortgage-changeset.xml");
kagent.applyChangeSet(changeset);
KnowledgeBase kbase = kagent.getKnowledgeBase();
//kagent.dispose();
return kbase;
}
}
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3:54 p.m.
I fixed the above with including right jar.
But now I get this.
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError:
org/drools/util/FastClassLoader
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
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4:05 p.m.
Did you File->Import...->Maven->Existing Maven Projects? I believe this is
offered with the M2Eclipse plugin.
Or, did you perform mvn eclipse:eclipse to build a Eclipse .project file?
Either of these will ensure your classpath dependencies are correctly setup.
On 14 September 2012 21:54, richard <rx74me(a)yahoo.com> wrote:
I fixed the above with including right jar.
But now I get this.
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError:
org/drools/util/FastClassLoader
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
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6:05 p.m.
Neither, I just created and java project and imported files into it.
Is there a link with the example with the eclipse project files in it I can download so I
can just import it as a existing project?
________________________________
From: Michael Anstis <michael.anstis(a)gmail.com>
To: Rules Users List <rules-users(a)lists.jboss.org>
Sent: Friday, September 14, 2012 4:05 PM
Subject: Re: [rules-users] Guvnor example how to access rules in database instead
sample.drl file?
Did you File->Import...->Maven->Existing Maven Projects? I believe this is
offered with the M2Eclipse plugin.
Or, did you perform mvn eclipse:eclipse to build a Eclipse .project file?
Either of these will ensure your classpath dependencies are correctly setup.
On 14 September 2012 21:54, richard <rx74me(a)yahoo.com> wrote:
I fixed the above with including right jar.
But now I get this.
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError:
org/drools/util/FastClassLoader
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
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1:20 a.m.
Hi,
The answer is no.
We used to have Eclipse project examples, but many of our developers use
alternative IDEs.
Given this and the general adoption of maven as a build system we moved to
what we have today.
sent on the move
On 15 Sep 2012 00:06, "Richard Yium" <rx74me(a)yahoo.com> wrote:
Neither, I just created and java project and imported files into it.
Is there a link with the example with the eclipse project files in it I
can download so I can just import it as a existing project?
------------------------------
*From:* Michael Anstis <michael.anstis(a)gmail.com>
*To:* Rules Users List <rules-users(a)lists.jboss.org>
*Sent:* Friday, September 14, 2012 4:05 PM
*Subject:* Re: [rules-users] Guvnor example how to access rules in
database instead sample.drl file?
Did you File->Import...->Maven->Existing Maven Projects? I believe this is
offered with the M2Eclipse plugin.
Or, did you perform mvn eclipse:eclipse to build a Eclipse .project file?
Either of these will ensure your classpath dependencies are correctly
setup.
On 14 September 2012 21:54, richard <rx74me(a)yahoo.com> wrote:
I fixed the above with including right jar.
But now I get this.
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError:
org/drools/util/FastClassLoader
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net
<http://java.net.urlclassloader.de/>.URLClassLoader.defineClass(Unknown
Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net
<http://java.net.urlclassloader.fi/>.URLClassLoader.findClass(Unknown
Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
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.
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1:54 p.m.
Could you post a link with the correct download for the example where I can
import a maven project?
I have installed Maven and the eclipse plugin for it.
Thanks,
Richard
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2:07 p.m.
Sure, no problem.
Git clone this : https://github.com/droolsjbpm/guvnor
Then you can import
https://github.com/droolsjbpm/guvnor/tree/master/guvnor-examples into
Eclipse using M2Eclipse.
With kind regards,
Mike
On 17 September 2012 19:54, richard <rx74me(a)yahoo.com> wrote:
Could you post a link with the correct download for the example where
I can
import a maven project?
I have installed Maven and the eclipse plugin for it.
Thanks,
Richard
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3:49 p.m.
I get could not get the value for parameter encoding for plugin execution
default-resources when I am doing and import of existing maven project.
Could not get the value for parameter encoding for plugin execution
default-resources
Plugin org.apache.maven.plugins:maven-resources-plugin:2.4.3 or one of its
dependencies could not be resolved: The following artifacts could not be
resolved: org.apache.maven.doxia:doxia-sink-api:jar:1.0-alpha-7,
commons-cli:commons-cli:jar:1.0,
org.codehaus.plexus:plexus-interactivity-api:jar:1.0-alpha-4: Failure to
transfer org.apache.maven.doxia:doxia-sink-api:jar:1.0-alpha-7 from
http://repo.maven.apache.org/maven2 was cached in the local repository,
resolution will not be reattempted until the update interval of central has
elapsed or updates are forced. Original error: Could not transfer artifact
org.apache.maven.doxia:doxia-sink-api:jar:1.0-alpha-7 from/to central
(http://repo.maven.apache.org/maven2): The operation was cancelled.
Also where do I find the correct lib/jars or they included in the import?
Thanks.
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3:54 p.m.
You really are having a tough time. It really is not this difficult.
doxia-sink-api is not, AFAIK (and I've searched our dependencies), not
required by Drools.
On 17 September 2012 21:49, richard <rx74me(a)yahoo.com> wrote:
I get could not get the value for parameter encoding for plugin
execution
default-resources when I am doing and import of existing maven project.
Could not get the value for parameter encoding for plugin execution
default-resources
Plugin org.apache.maven.plugins:maven-resources-plugin:2.4.3 or one of its
dependencies could not be resolved: The following artifacts could not be
resolved: org.apache.maven.doxia:doxia-sink-api:jar:1.0-alpha-7,
commons-cli:commons-cli:jar:1.0,
org.codehaus.plexus:plexus-interactivity-api:jar:1.0-alpha-4: Failure to
transfer org.apache.maven.doxia:doxia-sink-api:jar:1.0-alpha-7 from
http://repo.maven.apache.org/maven2 was cached in the local repository,
resolution will not be reattempted until the update interval of central has
elapsed or updates are forced. Original error: Could not transfer artifact
org.apache.maven.doxia:doxia-sink-api:jar:1.0-alpha-7 from/to central
(http://repo.maven.apache.org/maven2): The operation was cancelled.
Also where do I find the correct lib/jars or they included in the import?
Thanks.
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4:30 p.m.
What do you suggest?
Are you using Eclipse, if so which version?
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4:45 p.m.
Where do I get the correct jar for these?
import org.drools.KnowledgeBase;
import org.drools.agent.KnowledgeAgent;
import org.drools.agent.KnowledgeAgentFactory;
import org.drools.definition.type.FactType;
import org.drools.io.Resource;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
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1:37 a.m.
If you've elected to move away from Maven's dependency management then, for
now, add all JARs in drools-distribution-5.4.0.Final\binaries.
On 17 September 2012 22:45, richard <rx74me(a)yahoo.com> wrote:
Where do I get the correct jar for these?
import org.drools.KnowledgeBase;
import org.drools.agent.KnowledgeAgent;
import org.drools.agent.KnowledgeAgentFactory;
import org.drools.definition.type.FactType;
import org.drools.io.Resource;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
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7:14 a.m.
It did not load/include the jars when I imported from the github.
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8 a.m.
This is all you should need:-
git clone https://github.com/droolsjbpm/guvnor
Dependencies are not downloaded when cloning from github. This is normal
behavior.
Importing into Eclipse with M2Eclipse should download and import the
dependencies.
On 18 September 2012 13:14, richard <rx74me(a)yahoo.com> wrote:
It did not load/include the jars when I imported from the github.
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8:10 a.m.
Hmm, my eclipse, m2Eclipse didn't download the dependencies.
________________________________
From: Michael Anstis <michael.anstis(a)gmail.com>
To: Rules Users List <rules-users(a)lists.jboss.org>
Sent: Tuesday, September 18, 2012 8:00 AM
Subject: Re: [rules-users] Guvnor example how to access rules in database instead
sample.drl file?
This is all you should need:-
git clone https://github.com/droolsjbpm/guvnor
Dependencies are not downloaded when cloning from github. This is normal behavior.
Importing into Eclipse with M2Eclipse should download and import the dependencies.
On 18 September 2012 13:14, richard <rx74me(a)yahoo.com> wrote:
It did not load/include the jars when I imported from the github.
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