Drools - KieServices.Factory.get() returns null
1
I try to integrate a Drools project in a maven application.
The Drools app is running perfectly on his own, but when I try to integrate it in the Maven project, I get a java.lang.NullPointerException.
After some researches it seems to happen because KieServices.Factory.get() return me something, but all his parameters are null.
Here is my code :
public static final void main(String args) {
myBool test = new myBool(false) ;
try {
// load up the knowledge base
KieServices ks = KieServices.Factory.get();
KieContainer kContainer = ks.getKieClasspathContainer();
KieSession kSession = kContainer.newKieSession("ksession-rules");
// go !
Person toto = new Person("toto",21);
Person titi = new Person("titi",12);
Person tata = new Person("tata",15);
kSession.insert(toto);
I already did a lot of resarches, and try a lot of things to fix it (I've already added the dependency of drools-compiler).
Does someone have an idea to fix it ? Thanks !
java drools kie
asked Nov 19 '18 at 10:56
Jules CattenozJules Cattenoz
61
|
show 4 more comments
1
I try to integrate a Drools project in a maven application.
The Drools app is running perfectly on his own, but when I try to integrate it in the Maven project, I get a java.lang.NullPointerException.
After some researches it seems to happen because KieServices.Factory.get() return me something, but all his parameters are null.
Here is my code :
public static final void main(String args) {
myBool test = new myBool(false) ;
try {
// load up the knowledge base
KieServices ks = KieServices.Factory.get();
KieContainer kContainer = ks.getKieClasspathContainer();
KieSession kSession = kContainer.newKieSession("ksession-rules");
// go !
Person toto = new Person("toto",21);
Person titi = new Person("titi",12);
Person tata = new Person("tata",15);
kSession.insert(toto);
I already did a lot of resarches, and try a lot of things to fix it (I've already added the dependency of drools-compiler).
Does someone have an idea to fix it ? Thanks !
java drools kie
asked Nov 19 '18 at 10:56
Jules CattenozJules Cattenoz
61
"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
Nov 19 '18 at 11:03
no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
Nov 19 '18 at 11:05
Rules are not Fired.
– Lova Chittumuri
Nov 19 '18 at 11:05
Hi, thanks for your help, but after looking at your link, I don't understand how to correct the problem. It seems to be a problem with the session that is not created, but I don't find in your link how to fix this
– Jules Cattenoz
Nov 19 '18 at 12:57
Follow the video and write the code in step by step.First leave the fear from your end.
– Lova Chittumuri
Nov 19 '18 at 13:00
|
show 4 more comments
1
1
1
I try to integrate a Drools project in a maven application.
The Drools app is running perfectly on his own, but when I try to integrate it in the Maven project, I get a java.lang.NullPointerException.
After some researches it seems to happen because KieServices.Factory.get() return me something, but all his parameters are null.
Here is my code :
public static final void main(String args) {
myBool test = new myBool(false) ;
try {
// load up the knowledge base
KieServices ks = KieServices.Factory.get();
KieContainer kContainer = ks.getKieClasspathContainer();
KieSession kSession = kContainer.newKieSession("ksession-rules");
// go !
Person toto = new Person("toto",21);
Person titi = new Person("titi",12);
Person tata = new Person("tata",15);
kSession.insert(toto);
I already did a lot of resarches, and try a lot of things to fix it (I've already added the dependency of drools-compiler).
Does someone have an idea to fix it ? Thanks !
java drools kie
asked Nov 19 '18 at 10:56
Jules CattenozJules Cattenoz
61
I try to integrate a Drools project in a maven application.
The Drools app is running perfectly on his own, but when I try to integrate it in the Maven project, I get a java.lang.NullPointerException.
After some researches it seems to happen because KieServices.Factory.get() return me something, but all his parameters are null.
Here is my code :
public static final void main(String args) {
myBool test = new myBool(false) ;
try {
// load up the knowledge base
KieServices ks = KieServices.Factory.get();
KieContainer kContainer = ks.getKieClasspathContainer();
KieSession kSession = kContainer.newKieSession("ksession-rules");
// go !
Person toto = new Person("toto",21);
Person titi = new Person("titi",12);
Person tata = new Person("tata",15);
kSession.insert(toto);
I already did a lot of resarches, and try a lot of things to fix it (I've already added the dependency of drools-compiler).
Does someone have an idea to fix it ? Thanks !
java drools kie
java drools kie
asked Nov 19 '18 at 10:56
Jules CattenozJules Cattenoz
61
asked Nov 19 '18 at 10:56
Jules CattenozJules Cattenoz
61
asked Nov 19 '18 at 10:56
Jules CattenozJules Cattenoz
61
asked Nov 19 '18 at 10:56
Jules CattenozJules Cattenoz
61
asked Nov 19 '18 at 10:56
Jules CattenozJules Cattenoz
61
61
"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
Nov 19 '18 at 11:03
no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
Nov 19 '18 at 11:05
Rules are not Fired.
– Lova Chittumuri
Nov 19 '18 at 11:05
Hi, thanks for your help, but after looking at your link, I don't understand how to correct the problem. It seems to be a problem with the session that is not created, but I don't find in your link how to fix this
– Jules Cattenoz
Nov 19 '18 at 12:57
Follow the video and write the code in step by step.First leave the fear from your end.
– Lova Chittumuri
Nov 19 '18 at 13:00
|
show 4 more comments
"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
Nov 19 '18 at 11:03
no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
Nov 19 '18 at 11:05
Rules are not Fired.
– Lova Chittumuri
Nov 19 '18 at 11:05
Hi, thanks for your help, but after looking at your link, I don't understand how to correct the problem. It seems to be a problem with the session that is not created, but I don't find in your link how to fix this
– Jules Cattenoz
Nov 19 '18 at 12:57
Follow the video and write the code in step by step.First leave the fear from your end.
– Lova Chittumuri
Nov 19 '18 at 13:00
"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
Nov 19 '18 at 11:03
"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
Nov 19 '18 at 11:03
no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
Nov 19 '18 at 11:05
no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
Nov 19 '18 at 11:05
Rules are not Fired.
– Lova Chittumuri
Nov 19 '18 at 11:05
Rules are not Fired.
– Lova Chittumuri
Nov 19 '18 at 11:05
Hi, thanks for your help, but after looking at your link, I don't understand how to correct the problem. It seems to be a problem with the session that is not created, but I don't find in your link how to fix this
– Jules Cattenoz
Nov 19 '18 at 12:57
Hi, thanks for your help, but after looking at your link, I don't understand how to correct the problem. It seems to be a problem with the session that is not created, but I don't find in your link how to fix this
– Jules Cattenoz
Nov 19 '18 at 12:57
Follow the video and write the code in step by step.First leave the fear from your end.
– Lova Chittumuri
Nov 19 '18 at 13:00
Follow the video and write the code in step by step.First leave the fear from your end.
– Lova Chittumuri
Nov 19 '18 at 13:00
|
show 4 more comments
1 Answer
1
active
oldest
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0
public ReturnType yourMethodName(final YourClassName YourClassObj) {
KieSession kieSession = this.kieContainer.newKieSession("your Session");
kieSession.insert(YourClassObj);
kieSession.fireAllRules();
kieSession.dispose();
return your returnObject/Parameter;
}
In Configuration
@Bean
public KieContainer kieContainer() {
return KieServices.Factory.get().getKieClasspathContainer();
}
in Service Class:
private final KieContainer kieContainer;
@Autowired
public RulesEngineService(final KieContainer kieContainer) {
RulesEngineService.log.info("Initialising a new session.");
this.kieContainer = kieContainer;
}
answered Nov 19 '18 at 13:50
Lova ChittumuriLova Chittumuri
7351013
add a comment |
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1 Answer
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1 Answer
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active
oldest
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public ReturnType yourMethodName(final YourClassName YourClassObj) {
KieSession kieSession = this.kieContainer.newKieSession("your Session");
kieSession.insert(YourClassObj);
kieSession.fireAllRules();
kieSession.dispose();
return your returnObject/Parameter;
}
In Configuration
@Bean
public KieContainer kieContainer() {
return KieServices.Factory.get().getKieClasspathContainer();
}
in Service Class:
private final KieContainer kieContainer;
@Autowired
public RulesEngineService(final KieContainer kieContainer) {
RulesEngineService.log.info("Initialising a new session.");
this.kieContainer = kieContainer;
}
answered Nov 19 '18 at 13:50
Lova ChittumuriLova Chittumuri
7351013
add a comment |
0
public ReturnType yourMethodName(final YourClassName YourClassObj) {
KieSession kieSession = this.kieContainer.newKieSession("your Session");
kieSession.insert(YourClassObj);
kieSession.fireAllRules();
kieSession.dispose();
return your returnObject/Parameter;
}
In Configuration
@Bean
public KieContainer kieContainer() {
return KieServices.Factory.get().getKieClasspathContainer();
}
in Service Class:
private final KieContainer kieContainer;
@Autowired
public RulesEngineService(final KieContainer kieContainer) {
RulesEngineService.log.info("Initialising a new session.");
this.kieContainer = kieContainer;
}
answered Nov 19 '18 at 13:50
Lova ChittumuriLova Chittumuri
7351013
add a comment |
0
0
0
public ReturnType yourMethodName(final YourClassName YourClassObj) {
KieSession kieSession = this.kieContainer.newKieSession("your Session");
kieSession.insert(YourClassObj);
kieSession.fireAllRules();
kieSession.dispose();
return your returnObject/Parameter;
}
In Configuration
@Bean
public KieContainer kieContainer() {
return KieServices.Factory.get().getKieClasspathContainer();
}
in Service Class:
private final KieContainer kieContainer;
@Autowired
public RulesEngineService(final KieContainer kieContainer) {
RulesEngineService.log.info("Initialising a new session.");
this.kieContainer = kieContainer;
}
answered Nov 19 '18 at 13:50
Lova ChittumuriLova Chittumuri
7351013
public ReturnType yourMethodName(final YourClassName YourClassObj) {
KieSession kieSession = this.kieContainer.newKieSession("your Session");
kieSession.insert(YourClassObj);
kieSession.fireAllRules();
kieSession.dispose();
return your returnObject/Parameter;
}
In Configuration
@Bean
public KieContainer kieContainer() {
return KieServices.Factory.get().getKieClasspathContainer();
}
in Service Class:
private final KieContainer kieContainer;
@Autowired
public RulesEngineService(final KieContainer kieContainer) {
RulesEngineService.log.info("Initialising a new session.");
this.kieContainer = kieContainer;
}
answered Nov 19 '18 at 13:50
Lova ChittumuriLova Chittumuri
7351013
answered Nov 19 '18 at 13:50
Lova ChittumuriLova Chittumuri
7351013
answered Nov 19 '18 at 13:50
Lova ChittumuriLova Chittumuri
7351013
answered Nov 19 '18 at 13:50
Lova ChittumuriLova Chittumuri
7351013
7351013
add a comment |
add a comment |
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"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
Nov 19 '18 at 11:03
no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
Nov 19 '18 at 11:05
Rules are not Fired.
– Lova Chittumuri
Nov 19 '18 at 11:05
Hi, thanks for your help, but after looking at your link, I don't understand how to correct the problem. It seems to be a problem with the session that is not created, but I don't find in your link how to fix this
– Jules Cattenoz
Nov 19 '18 at 12:57
Follow the video and write the code in step by step.First leave the fear from your end.
– Lova Chittumuri
Nov 19 '18 at 13:00