/**
* Copyright 2007-2010 非也
* All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License v3 as published by the Free Software
* Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with this library; if not, see http://www.gnu.org/licenses/lgpl.html.
*
*/
package org.fireflow.console.servlet.repository;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.fireflow.client.WorkflowQuery;
import org.fireflow.client.WorkflowSession;
import org.fireflow.client.WorkflowSessionFactory;
import org.fireflow.client.query.Order;
import org.fireflow.console.misc.TreeNode;
import org.fireflow.demo.fireflow_ext.WorkflowUtil;
import org.fireflow.engine.context.RuntimeContext;
import org.fireflow.engine.entity.config.FireflowConfig;
import org.fireflow.engine.entity.config.impl.FireflowConfigImpl;
import org.fireflow.engine.entity.repository.ProcessDescriptor;
import org.fireflow.engine.entity.repository.ProcessDescriptorProperty;
import org.fireflow.engine.entity.repository.ProcessRepository;
import org.springframework.transaction.support.TransactionTemplate;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
/**
*
* @author 非也 nychen2000@163.com
* Fire Workflow 官方网站：www.firesoa.com 或者 www.fireflow.org
*
*/
public class ListDefinitionsServlet extends HttpServlet{
protected WebApplicationContext springCtx = null;
protected RuntimeContext fireContext = null;
protected TransactionTemplate transactionTemplate = null;
public void init() throws ServletException {
//准备相关参数及相关spring bean
springCtx = WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext());
fireContext = (RuntimeContext)springCtx.getBean(RuntimeContext.Fireflow_Runtime_Context_Name);
transactionTemplate = (TransactionTemplate)springCtx.getBean("demoTransactionTemplate");
}
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
this.doPost(req, resp);
}
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String actionType = req.getParameter("workflowActionType");
if (actionType!=null && actionType.equals("LOAD_DEFINITION")){
loadDefinition(req,resp);
}else{
loadAllDefinitions(req,resp);
}
}
protected void loadDefinition(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String descriptorId = req.getParameter("processDescriptorId");
//1、查找流程定义
//获得当前用户，建议该用户实现Fireflow的用户接口
final org.fireflow.engine.modules.ousystem.User currentUser =
WorkflowUtil.getCurrentWorkflowUser(req.getSession());
WorkflowSession workflowSession = WorkflowSessionFactory.createWorkflowSession(fireContext, currentUser);
WorkflowQuery<ProcessRepository> q = workflowSession.createWorkflowQuery(ProcessRepository.class);
ProcessRepository repository = q.get(descriptorId);
req.setAttribute("process_repository",repository);
//5、导航到结果页面
RequestDispatcher dispatcher = req.getRequestDispatcher("/fireflow_console/repository/view_definition.jsp");
dispatcher.forward(req, resp);
}
protected void loadAllDefinitions(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
//1、获得当前用户，建议该用户实现Fireflow的用户接口
final org.fireflow.engine.modules.ousystem.User currentUser =
WorkflowUtil.getCurrentWorkflowUser(req.getSession());
WorkflowSession workflowSession = WorkflowSessionFactory.createWorkflowSession(fireContext, currentUser);
//2、查询所有的ProcessDescriptor
WorkflowQuery<ProcessDescriptor> processDescriptorQuery = workflowSession.createWorkflowQuery(ProcessDescriptor.class);
processDescriptorQuery.addOrder(Order.asc(ProcessDescriptorProperty.PACKAGE_ID));
List<ProcessDescriptor> processDescriptorList = processDescriptorQuery.list();
if (processDescriptorList==null){
processDescriptorList = new ArrayList<ProcessDescriptor>();
}
//3、组装成流程定义树
TreeNode treeRoot = buildProcessDecriptTree( processDescriptorList);
//保存到request attribute
req.setAttribute("defsTree", treeRoot);
//5、导航到结果页面
RequestDispatcher dispatcher = req.getRequestDispatcher("/fireflow_console/repository/list_definitions.jsp");
dispatcher.forward(req, resp);
}
protected TreeNode buildProcessDecriptTree(List<ProcessDescriptor> allProcessDescriptors){
TreeNode rootNode = new TreeNode();
rootNode.setTreeId("0");
rootNode.setName("所有流程");
rootNode.setDescription("所有流程");
if (allProcessDescriptors==null || allProcessDescriptors.size()==0){
return rootNode;
}
//查找流程，建立叶子节点
for (ProcessDescriptor descriptor : allProcessDescriptors){
String pkgId = descriptor.getPackageId();
if (pkgId==null || pkgId.trim().equals("")){
TreeNode treeNode4ProcessDescriptor = new TreeNode();
treeNode4ProcessDescriptor.setTreeId(descriptor.getProcessId()+"_v"+descriptor.getVersion());
treeNode4ProcessDescriptor.setName(descriptor.getDisplayName()+".v"+descriptor.getVersion()+".xml");
treeNode4ProcessDescriptor.setDescription(descriptor.getDescription());
treeNode4ProcessDescriptor.setLeaf(true);
treeNode4ProcessDescriptor.setActionUrl("/servlet/ListDefinitionsServlet?workflowActionType=LOAD_DEFINITION&processDescriptorId="+descriptor.getId());
rootNode.addChild(treeNode4ProcessDescriptor);
}else{
TreeNode parentTreeNode = insertPackageIntoTree(rootNode,pkgId);
TreeNode treeNode4ProcessDescriptor = new TreeNode();
treeNode4ProcessDescriptor.setTreeId(descriptor.getProcessId()+"_v"+descriptor.getVersion());
treeNode4ProcessDescriptor.setName(descriptor.getDisplayName()+".v"+descriptor.getVersion()+".xml");
treeNode4ProcessDescriptor.setDescription(descriptor.getDescription());
treeNode4ProcessDescriptor.setLeaf(true);
treeNode4ProcessDescriptor.setActionUrl("/servlet/ListDefinitionsServlet?workflowActionType=LOAD_DEFINITION&processDescriptorId="+descriptor.getId());
parentTreeNode.addChild(treeNode4ProcessDescriptor);
}
}
return rootNode;
}
private TreeNode insertPackageIntoTree(TreeNode rootTreeNode,String pakcageId){
StringTokenizer tokenizer = new StringTokenizer(pakcageId,".");
TreeNode parentTreeNode = rootTreeNode;
while(tokenizer.hasMoreTokens()){
String pkgFragment = tokenizer.nextToken();
TreeNode existNode = findExistTreeNode(parentTreeNode,pkgFragment);
if (existNode==null){
//创建一个字节点
existNode = new TreeNode();
existNode.setTreeId(pkgFragment);
existNode.setName(pkgFragment);
existNode.setLeaf(false);
existNode.setDescription(pkgFragment);
parentTreeNode.addChild(existNode);
}
parentTreeNode = existNode;
}
return parentTreeNode;
}
private TreeNode findExistTreeNode(TreeNode treeNode,String fragment){
List<TreeNode> children = treeNode.getChildren();
if (treeNode.getTreeId().equals(fragment)){
return treeNode;
}else if (children!=null && children.size()>0){
for (TreeNode tnd : children){
TreeNode tmp = findExistTreeNode(tnd,fragment);
if (tmp!=null){
return tmp;
}
}
return null;
}else{
return null;
}
}
}