articleauditaction.java

一个很好的jbpm应用实例

package c20.struts.action;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

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.def.Transition;
import org.jbpm.graph.exe.ProcessInstance;
import org.jbpm.graph.exe.Token;

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

/** 
 * 
 * 审批文章Action类
 * @struts.action path="/myarticle" scope="request" validate="false"
 */
public class ArticleAuditAction extends Action{
    private static final Log log = LogFactory.getLog(ArticleAuditAction.class);
    
    private ArticleService articleService;
    
    private ArticleTypeService articleTypeService;

    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);
		//得到文章信息
		//得到文章号
		String sarticleNo = request.getParameter("articleNo");
		int articleNo = ConvertUtil.convertInt(sarticleNo);
		
		Article article = articleService.getArticle(articleNo);
		request.setAttribute("article", article);
		//判断此用户是否有此文章审批权限
		if(article.getAuditState() != null && article.getAuditState().equals(userSesssion.getDutyValue())){
			
			//创建相应的流程实例
			//得到相应的文章类型
			ArticleType articleType = articleTypeService.getArticleType(article.getTypeNo().intValue());
			request.setAttribute("articleType", articleType);
			//得到相应的流程
			JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
			
			ProcessInstance processInstance = jbpmContext.getProcessInstance(article.getPiId());
			
 			//得到当前的执行令牌
			Token token = processInstance.getRootToken();
			//得到当前的可执行转换
			List transitions = token.getNode().getLeavingTransitions();
			Set transitionnames = new HashSet();
			if(transitions != null){
				for(int i=0; i<transitions.size(); i++){
					Transition transition = (Transition)transitions.get(i);
					transitionnames.add(transition.getName());
				}
			}
			request.setAttribute("transitionnames", transitionnames);
			jbpmContext.close();
			
		}
		
		return mapping.findForward("success");
	}
	public ArticleService getArticleService() {
		return articleService;
	}
	public void setArticleService(ArticleService articleService) {
		this.articleService = articleService;
	}
	public JbpmConfiguration getJbpmConfiguration() {
		return jbpmConfiguration;
	}
	public void setJbpmConfiguration(JbpmConfiguration jbpmConfiguration) {
		this.jbpmConfiguration = jbpmConfiguration;
	}
	public ArticleTypeService getArticleTypeService() {
		return articleTypeService;
	}
	public void setArticleTypeService(ArticleTypeService articleTypeService) {
		this.articleTypeService = articleTypeService;
	}

}