java - Spring Boot 和 Drools 集成

Question

我正在尝试使用 Spring Boot 1.2.2.RELEASE 运行 drools 6.2.0.Final。我按照文档中的说明配置了 drools。我的 kie-context.xml 配置文件是我保存 drools bean 的地方，看起来像这样:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:kie="http://drools.org/schema/kie-spring"
   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                      http://drools.org/schema/kie-spring http://drools.org/schema/kie-spring.xsd">

<kie:kmodule id="sample_module">
    <kie:kbase name="kbase1" packages="composition-rules">
        <kie:ksession name="ksession1" type="stateless"/>
    </kie:kbase>
</kie:kmodule>

<bean id="kiePostProcessor" class="org.kie.spring.KModuleBeanFactoryPostProcessor"/>

当我尝试编译应用程序并使用 spring-boot 运行时，出现以下错误:

java.lang.IllegalStateException: LifecycleProcessor not initialized - call 'refresh' before invoking lifecycle methods via the context: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@6ab6cc3b: startup date [Wed Apr 15 13:57:02 CEST 2015]; root of context hierarchy
at org.springframework.context.support.AbstractApplicationContext.getLifecycleProcessor(AbstractApplicationContext.java:357)
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:877)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.doClose(EmbeddedWebApplicationContext.java:150)
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:836)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:342)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
at skeleton.StorfinoApplication.main(StorfinoApplication.java:23)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)
at java.lang.Thread.run(Thread.java:745)

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: Unable to get all ZipFile entries: /home/lukasz/dev/skeleton/application/target/application-1.0-SNAPSHOT.jar!
at org.drools.core.util.IoUtils.indexZipFile(IoUtils.java:133)
at org.drools.compiler.kie.builder.impl.ZipKieModule.<init>(ZipKieModule.java:20)
at org.drools.compiler.kie.builder.impl.ClasspathKieProject.createInternalKieModule(ClasspathKieProject.java:186)
at org.kie.spring.KModuleBeanFactoryPostProcessor.createKieModule(KModuleBeanFactoryPostProcessor.java:189)
at org.kie.spring.KModuleBeanFactoryPostProcessor.addKieModuleToRepo(KModuleBeanFactoryPostProcessor.java:162)
at org.kie.spring.KModuleBeanFactoryPostProcessor.postProcessBeanFactory(KModuleBeanFactoryPostProcessor.java:121)
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:265)
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:177)
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:606)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:462)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
at skeleton.StorfinoApplication.main(StorfinoApplication.java:23)
... 6 more
Caused by: java.io.FileNotFoundException: /home/user-name/dev/skeleton/application/target/application-1.0-SNAPSHOT.jar! (No such file or directory)
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:220)
at java.util.zip.ZipFile.<init>(ZipFile.java:150)
at java.util.zip.ZipFile.<init>(ZipFile.java:164)
at org.drools.core.util.IoUtils.indexZipFile(IoUtils.java:124)
... 21 more

我用于构建项目的命令是:mvn clean package 并将其作为 jar 文件运行 (java -jar application/target/application-1.0-SNAPSHOT.jar)。

引起我注意的一件事是文件路径(未找到的路径)末尾有一个感叹号(它不应该在这里)。我观察到的另一件事是，当我在 IntelijIdea ide 中运行该项目时，它会成功构建并正常运行。

这种错误的原因可能是什么？

Answer 1

我尝试了同样的方法并最终构建了一个 spring-boot-starter-drools为此，因为那里没有什么适合我的。我没有使用 XML-Configuration，因为最新的 Spring 配置仅与 Java 有关 - 我也建议您这样做。

建议:

1. 只需使用启动器，如启动器或 example project 中所述

2. 使用此工作配置将 Drools 集成到您的 Spring Boot 项目中:

   @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. spring 版本存在冲突，因为 Spring Boot 基于 Spring 4.x 而 kie-spring 依赖于 Spring 3.2 - 我得到了最愚蠢的异常，直到最后我排除了所有 3.2-dependecies在我的 pom.xml 中:

   <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>