欢迎来到Doc100.Net免费学习资源知识分享平台!
您的位置:首页 > 程序异常 >

jbpm(3):spring 集成 jbpm4.3 (jbpm4+hibernate4)

更新时间: 2014-01-05 02:56:39 责任编辑: Author_N1

 

jBPM(三):Spring 集成 jBPM4.3 (jBPM4+Hibernate4)
Spring 集成 jBPM4.3 主要工作有2点:

1. 将jbpm默认的hibernate事务换成spring事务,即在jbpm.cfg.xml文件中将
<import resource="jbpm.tx.hibernate.cfg.xml" />

替换成:
 <import resource="jbpm.tx.spring.cfg.xml" />


2. jBPM的核心控件processEngine由Spring生成、管理。

这2方面的内容,网上有很多资料查询,但基本都是在xml文件中进行配置,而我是在之前的代码中集成jBPM,之前的代码采用的是注解的方式(Spring注解,Hibernate注解),所以采用编码的方式获得了processEngine对象,即:

	@Bean(name="processEngine") 
	@DependsOn("sessionFactory")
	public ProcessEngine getProcessEngine() throws Exception{ 
		processEngine = new ConfigurationImpl().springEnabled()
               .setHibernateSessionFactory(this.getSessionFactory())
               .springInitiated(applicationContext)
               .buildProcessEngine(); 
		return processEngine;
	} 


从上述代码中可以看到,生成processEngine对象需要设置SessionFactory对象。查看jBPM4.3源码SpringProcessEngine.java类,发现其获取的是LocalSessionFactoryBena对象,而我在代码中采用的是注解方式,所以生成的是AnnotationSessionFactoryBean对象,即:
	@Bean(name="annotationSessionFactoryBean")
	@DependsOn("dataSource")
	public AnnotationSessionFactoryBean getAnnotationSessionFactoryBean() throws Exception { 
		
		Properties properties = new Properties();
		properties.put("hibernate.dialect", dialect); 
		properties.put("hibernate.show_sql", showSql);
		properties.put("hibernate.hbm2ddl.auto", hbm2ddl);
		properties.put("hibernate.max_fetch_depth", max_fetch_depth);
		properties.put("hibernate.temp.use_jdbc_metadata_defaults", "false");  
		properties.put("hibernate.jdbc.fetch_size", "50");
		properties.put("hibernate.jdbc.batch_size", "25"); 
		 
		AnnotationSessionFactoryBean a = new AnnotationSessionFactoryBean(); 
		a.setDataSource(this.getDataSource());
		a.setHibernateProperties(properties);   
		a.setPackagesToScan(models.split(","));
		// jbpm文件
		a.setMappingResources(new String[]{"jbpm.repository.hbm.xml","jbpm.execution.hbm.xml","jbpm.history.hbm.xml","jbpm.task.hbm.xml","jbpm.identity.hbm.xml"});  
		a.afterPropertiesSet();   
		return a;
		
	} 



解决的办法是在本地源码中新建一个对应的SpringProcessEngine类,用以覆盖jBPM源码。修改其中的代码,获取AnnotationSessionFactoryBean对象。以下是修改的create方法:

  public static ProcessEngine create(ConfigurationImpl configuration) {
    SpringProcessEngine springProcessEngine = null;
    
    ApplicationContext applicationContext = null;
    if (configuration.isInstantiatedFromSpring()) {
      applicationContext = (ApplicationContext) configuration.getApplicationContext();

      springProcessEngine = new SpringProcessEngine();
      springProcessEngine.applicationContext = applicationContext;
      springProcessEngine.initializeProcessEngine(configuration);

//      原先的代码
//      LocalSessionFactoryBean localSessionFactoryBean = springProcessEngine.get(LocalSessionFactoryBean.class);
//      Configuration hibernateConfiguration = localSessionFactoryBean.getConfiguration();
//      springProcessEngine.processEngineWireContext
//          .getWireDefinition()
//          .addDescriptor(new ProvidedObjectDescriptor(hibernateConfiguration, true));
//      
//      springProcessEngine.checkDb(configuration);
      
      // 将LocalSessionFactoryBean 换成 AnnotationSessionFactoryBean
      
      AnnotationSessionFactoryBean annotationSessionFactoryBean = springProcessEngine.get(AnnotationSessionFactoryBean.class);
      Configuration hibernateConfiguration = annotationSessionFactoryBean.getConfiguration();       
      springProcessEngine.processEngineWireContext
                         .getWireDefinition()
                         .addDescriptor(new ProvidedObjectDescriptor(hibernateConfiguration, true));
      
      springProcessEngine.checkDb(configuration); 

    } else {
      String springCfg = (String) configuration.getProcessEngineWireContext().get("spring.cfg");
      if (springCfg==null) {
        springCfg = "applicationContext.xml";
      }
      applicationContext = new ClassPathXmlApplicationContext(springCfg);
      springProcessEngine = (SpringProcessEngine) applicationContext.getBean("processEngine");
    }
    
    return springProcessEngine;
  }


本地新建的类:

上一篇:上一篇
下一篇:下一篇

 

随机推荐程序问答结果

 

 

如对文章有任何疑问请提交到问题反馈,或者您对内容不满意,请您反馈给我们DOC100.NET论坛发贴求解。
DOC100.NET资源网,机器学习分类整理更新日期::2014-01-05 02:56:39
如需转载,请注明文章出处和来源网址:http://www.doc100.net/bugs/t/16449/
本文WWW.DOC100.NET DOC100.NET版权所有。