Drools - KieServices.Factory.get() returns null

up vote
1
down vote

favorite

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 !

asked 2 days ago

Jules Cattenoz

New contributor

"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
2 days ago

no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
2 days ago

Rules are not Fired.
– Lova Chittumuri
2 days ago

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
2 days ago

Follow the video and write the code in step by step.First leave the fear from your end.
– Lova Chittumuri
2 days ago

|
show 4 more comments

up vote
1
down vote

favorite

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 !

asked 2 days ago

Jules Cattenoz

New contributor

"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
2 days ago

no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
2 days ago

Rules are not Fired.
– Lova Chittumuri
2 days ago

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
2 days ago

Follow the video and write the code in step by step.First leave the fear from your end.
– Lova Chittumuri
2 days ago

|
show 4 more comments

up vote
1
down vote

favorite

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 !

asked 2 days ago

Jules Cattenoz

New contributor

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 2 days ago

Jules Cattenoz

New contributor

asked 2 days ago

Jules Cattenoz

New contributor

asked 2 days ago

Jules Cattenoz

New contributor

asked 2 days ago

Jules Cattenoz

asked 2 days ago

Jules Cattenoz

New contributor

Jules Cattenoz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
2 days ago

no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
2 days ago

Rules are not Fired.
– Lova Chittumuri
2 days ago

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
2 days ago

Follow the video and write the code in step by step.First leave the fear from your end.
– Lova Chittumuri
2 days ago

|
show 4 more comments

"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
2 days ago

no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
2 days ago

Rules are not Fired.
– Lova Chittumuri
2 days ago

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
2 days ago

Follow the video and write the code in step by step.First leave the fear from your end.
– Lova Chittumuri
2 days ago

"session-rules" session not created. javainuse.com/drools/drools_decision
– Lova Chittumuri
2 days ago

no need to do research. Please go a head with above mentioned link. and Welcome to StackOverFlow.
– Lova Chittumuri
2 days ago

Rules are not Fired.
– Lova Chittumuri
2 days ago

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
2 days ago

Follow the video and write the code in step by step.First leave the fear from your end.
– Lova Chittumuri
2 days ago

|
show 4 more comments

1 Answer
1

active

oldest

votes

up vote
0
down vote

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 2 days ago

Lova Chittumuri

6571012

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',
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
});

}
});

Jules Cattenoz is a new contributor. Be nice, and check out our Code of Conduct.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

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

Name

Required, but never shown

1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
0
down vote

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 2 days ago

Lova Chittumuri

6571012

add a comment |

up vote
0
down vote

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 2 days ago

Lova Chittumuri

6571012

add a comment |

up vote
0
down vote

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 2 days ago

Lova Chittumuri

6571012

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 2 days ago

Lova Chittumuri

6571012

answered 2 days ago

Lova Chittumuri

6571012

answered 2 days ago

Lova Chittumuri

6571012

answered 2 days ago

Lova Chittumuri

6571012

add a comment |

Jules Cattenoz is a new contributor. Be nice, and check out our Code of Conduct.

draft saved

draft discarded

Jules Cattenoz is a new contributor. Be nice, and check out our Code of Conduct.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Name

Required, but never shown

Name

Required, but never shown

This page is only for reference, If you need detailed information, please check here

Search This Blog

Ufyukyu