Kie（Drools）+ Spring + Camel + Excel决策表

Question

我目前有工作的Excel决策表被读入带有以下库的驼峰路线：

• Drools 5.6.0.final
• Camel 2.14.0
• Spring-boot 1.0.2
• JDK 7

我们正在将spring-boot升级到1.1.5，升级后，drools决策表编译开始崩溃，即使分配了2 GB的permGen空间。

似乎新的spring-boot版本会导致某种类加载器循环占用它可以找到的所有PerGem。

如果我们使用JDK8，问题＆＃34;消失了＃34;，但是在流氓决策表编译期间启动进程会占用1.6GB的内存。

我尝试将drools升级到6.1.0（KIE），但之后我再也无法使用基于excel的决策表，因为似乎没有任何方法可以配置Spring / Camel / Drools bean了。或者至少http://docs.jboss.org/drools/release/6.1.0.Final/drools-docs/html/ch.kie.spring.html#d0e12957没有提供任何有关如何实现这一目标的线索。

有没有人知道如何在JDK 7下更有效地使drools 5.6.0工作或如何在JDK 8下使用Drools / Kie 6 +来实现excel决策表？

JDK 7 permGen错误的异常堆栈跟踪：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'excelDTABLE_KBase': Invocation of init method failed; nested exception is java.lang.OutOfMemoryError: PermGen space
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1554)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:687)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:762)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:109)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:952)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:941)
    at my.domain.Application.main(Application.java:54)

Caused by: java.lang.OutOfMemoryError: PermGen space
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
    at org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:624)
    at org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254)
    at org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237)
    at org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at org.drools.rule.JavaDialectRuntimeData.wire(JavaDialectRuntimeData.java:434)
    at org.drools.rule.JavaDialectRuntimeData.wire(JavaDialectRuntimeData.java:429)
    at org.drools.rule.JavaDialectRuntimeData.onBeforeExecute(JavaDialectRuntimeData.java:257)
    at org.drools.rule.DialectRuntimeRegistry.onBeforeExecute(DialectRuntimeRegistry.java:139)
    at org.drools.compiler.PackageBuilder.reloadAll(PackageBuilder.java:1202)
    at org.drools.compiler.PackageBuilder.compileAllRules(PackageBuilder.java:951)
    at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:938)
    at org.drools.compiler.PackageBuilder.addPackageFromDecisionTable(PackageBuilder.java:451)
    at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:715)
    at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:51)
    at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:40)
    at org.drools.container.spring.beans.KnowledgeBaseBeanFactory.afterPropertiesSet(KnowledgeBaseBeanFactory.java:110)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1613)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1550)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:687)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:762)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:109)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691)

Answer 1

提供的解决方案是使用弹簧靴使用kie为流口水决策表

refference for drool table仅供参考，请注意，跨条件共享的对象必须具有跨这些条件的合并单元格

@Configuration
public class DroolConfig {

    private KieServices kieServices = KieServices.Factory.get();

    private KieFileSystem getKieFileSystem() throws IOException {
        KieFileSystem kieFileSystem = kieServices.newKieFileSystem();
        String xls[] = new String[] {"wallet.xls","offer.xls"}; // path to file
        for(int i=0 ; i< xls.length; i++) {
            kieFileSystem.write(ResourceFactory.newClassPathResource(xls[i]));
        }
        return kieFileSystem;

    }

    @Bean
    public KieContainer getKieContainer() throws IOException {
        System.out.println("Container created...");
        getKieRepository();
        KieBuilder kb = kieServices.newKieBuilder(getKieFileSystem());
        kb.buildAll();
        KieModule kieModule = kb.getKieModule();
        KieContainer kContainer = kieServices.newKieContainer(kieModule.getReleaseId());
        return kContainer;

    }

    private void getKieRepository() {
        final KieRepository kieRepository = kieServices.getRepository();
        kieRepository.addKieModule(new KieModule() {
            public ReleaseId getReleaseId() {
                return kieRepository.getDefaultReleaseId();
            }
        });
    }

    @Bean
    public KieSession getKieSession() throws IOException {
        System.out.println("session created...");
        return getKieContainer().newKieSession();

    }

}

@RestController
public class MegaOfferController {
    @Autowired
    private KieSession session;

    @PostMapping("/order")
    public Order orderNow(@RequestBody Order order) {
        session.insert(order);
        session.fireAllRules();
        return order;
    }

<properties>
        <drools.version>6.4.0.Final</drools.version>
</properties>
    <dependencies>
        <dependency>
            <groupId>org.kie</groupId>
            <artifactId>kie-api</artifactId>
            <version>${drools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.drools</groupId>
            <artifactId>drools-core</artifactId>
            <version>${drools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.drools</groupId>
            <artifactId>drools-compiler</artifactId>
            <version>${drools.version}</version>
        </dependency>


        <dependency>
    <groupId>org.drools</groupId>
     <artifactId>drools-decisiontables</artifactId>
     <version>${drools.version}</version>
   </dependency>

        <dependency>
            <groupId>org.kie</groupId>
            <artifactId>kie-ci</artifactId>
            <version>${drools.version}</version>
         </dependency>

    </dependencies>