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 at 10:56
Jules 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 at 10:56
Jules Cattenoz
61
"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
Nov 19 at 11:03
no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
Nov 19 at 11:05
Rules are not Fired.
– Lova Chittumuri
Nov 19 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 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 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 at 10:56
Jules 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 at 10:56
Jules Cattenoz
61
asked Nov 19 at 10:56
Jules Cattenoz
61
asked Nov 19 at 10:56
Jules Cattenoz
61
asked Nov 19 at 10:56
Jules Cattenoz
61
asked Nov 19 at 10:56
Jules Cattenoz
61
61
"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
Nov 19 at 11:03
no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
Nov 19 at 11:05
Rules are not Fired.
– Lova Chittumuri
Nov 19 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 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 at 13:00
|
show 4 more comments
"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
Nov 19 at 11:03
no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
Nov 19 at 11:05
Rules are not Fired.
– Lova Chittumuri
Nov 19 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 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 at 13:00
"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
Nov 19 at 11:03
"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
Nov 19 at 11:03
no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
Nov 19 at 11:05
no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
Nov 19 at 11:05
Rules are not Fired.
– Lova Chittumuri
Nov 19 at 11:05
Rules are not Fired.
– Lova Chittumuri
Nov 19 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 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 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 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 at 13:00
|
show 4 more comments
1 Answer
1
active
oldest
votes
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 at 13:50
Lova Chittumuri
6671012
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53373116%2fdrools-kieservices-factory-get-returns-null%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
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 at 13:50
Lova Chittumuri
6671012
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 at 13:50
Lova Chittumuri
6671012
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 at 13:50
Lova Chittumuri
6671012
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 at 13:50
Lova Chittumuri
6671012
answered Nov 19 at 13:50
Lova Chittumuri
6671012
answered Nov 19 at 13:50
Lova Chittumuri
6671012
answered Nov 19 at 13:50
Lova Chittumuri
6671012
6671012
add a comment |
add a comment |
draft saved
draft discarded
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53373116%2fdrools-kieservices-factory-get-returns-null%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
Nov 19 at 11:03
no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
Nov 19 at 11:05
Rules are not Fired.
– Lova Chittumuri
Nov 19 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 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 at 13:00