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Spring boot and drools integration

由 ℡╲_俬逩灬. 提交于 2019-12-04 10:36:44

I tried the same and ended up building an spring-boot-starter-drools for that, because there was nothing working for me out there. I didn´t use the XML-Configuration, because the latest Spring configuration is all about doing with Java only - i would also recommend that in your case.

Suggestions:

  1. Just use the starter, as decribed in the starter or in the example project

  2. Integrating Drools into your Spring Boot-Project with this working configuration:

    @Configuration
public class DroolsAutoConfiguration {

private static final String RULES_PATH = "rules/";

@Bean
public KieFileSystem kieFileSystem() throws IOException {
    KieFileSystem kieFileSystem = getKieServices().newKieFileSystem();
    for (Resource file : getRuleFiles()) {
        kieFileSystem.write(ResourceFactory.newClassPathResource(RULES_PATH + file.getFilename(), "UTF-8"));
    }        
    return kieFileSystem;
}

private Resource[] getRuleFiles() throws IOException {
    ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();
    return resourcePatternResolver.getResources("classpath*:" + RULES_PATH + "**/*.*");
}

@Bean
public KieContainer kieContainer() throws IOException {
    final KieRepository kieRepository = getKieServices().getRepository();

    kieRepository.addKieModule(new KieModule() {
        public ReleaseId getReleaseId() {
            return kieRepository.getDefaultReleaseId();
        }
    });

    KieBuilder kieBuilder = getKieServices().newKieBuilder(kieFileSystem()); 
    kieBuilder.buildAll();

    return getKieServices().newKieContainer(kieRepository.getDefaultReleaseId());
}

private KieServices getKieServices() {
    return KieServices.Factory.get();
}

@Bean
public KieBase kieBase() throws IOException {
    return kieContainer().getKieBase();
}

@Bean
public KieSession kieSession() throws IOException {
    return kieContainer().newKieSession();
}

@Bean
public KModuleBeanFactoryPostProcessor kiePostProcessor() {
    return new KModuleBeanFactoryPostProcessor();
}
}

  3. There are conflicts of spring-versions, because Spring Boot is based upon Spring 4.x and kie-spring depends on Spring 3.2 - i got the silliest Exceptions, till in the end I excluded all the 3.2-dependecies in my pom.xml:

    <dependency>
<groupId>org.kie</groupId>
<artifactId>kie-spring</artifactId>
<version>${drools.version}</version>
<exclusions>
    <exclusion>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
    </exclusion>
    <exclusion>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
    </exclusion>
    <exclusion>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
    </exclusion>
    <exclusion>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
    </exclusion>
</exclusions>
</dependency>
标签
java
Spring
spring-boot
drools
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