myarticlepubsubaction.java

一个很好的jbpm应用实例

package c20.struts.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.jbpm.JbpmConfiguration;
import org.jbpm.JbpmContext;
import org.jbpm.graph.exe.ProcessInstance;
import org.jbpm.graph.exe.Token;

import c20.entity.Article;
import c20.service.ArticleService;
import c20.session.UserSession;
import c20.util.ConvertUtil;

/** 
 * 
 * 发布文章操作Action类
 * @struts.action path="/myarticlepubsub" scope="request" validate="false"
 */
public class MyArticlePubSubAction extends Action{
    private static final Log log = LogFactory.getLog(MyArticlePubSubAction.class);
    /**
     * 文章服务接口实现对象
     */
    private ArticleService articleService;
    /**
     * JBPM服务接口实现对象
     */
    private JbpmConfiguration jbpmConfiguration;
        
	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		log.debug("MyArticleAction.execute()");
		
		UserSession userSesssion = UserSession.getSession(request, response);
		//得到文章号
		String sarticleNo = request.getParameter("articleNo");
		int articleNo = ConvertUtil.convertInt(sarticleNo);
		
		//得到文章信息
		Article article = articleService.getArticle(articleNo);
		//判断是否是此用户文章
		if(article.getUserNo() != null && article.getUserNo().intValue() == userSesssion.getUserNo()){
			
			//得到相应的流程实例，触发相应的转换
			JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
			
			ProcessInstance processInstance = jbpmContext.getProcessInstance(article.getPiId());
			log.error("instance:" + processInstance.getId());
			
			String transitionname = request.getParameter("transitionname");
			
			//触发转换,改变流程状态
			Token token = processInstance.getRootToken();
			token.signal(transitionname);
			
			//保存流程实例相关信息
			jbpmContext.save(processInstance);
			jbpmContext.save(token);
			jbpmContext.close();
			
		}
		
		return mapping.findForward("success");
	}
	/**
	 * 得到文章服务接口实现对象
	 * @return articleService
	 */
	public ArticleService getArticleService() {
		return articleService;
	}
	/**
	 * 设置文章服务接口实现对象
	 * @param articleService 要设置的 articleService
	 */
	public void setArticleService(ArticleService articleService) {
		this.articleService = articleService;
	}
	/**
	 * 得到JBPM服务接口实现对象
	 * @return jbpmConfiguration
	 */
	public JbpmConfiguration getJbpmConfiguration() {
		return jbpmConfiguration;
	}
	/**
	 * 设置JBPM服务接口实现对象
	 * @param jbpmConfiguration 要设置的 jbpmConfiguration
	 */
	public void setJbpmConfiguration(JbpmConfiguration jbpmConfiguration) {
		this.jbpmConfiguration = jbpmConfiguration;
	}
}