两篇整合Activiti Modeler到业务系统

整合Activiti Modeler到业务系统（或BPM平台）
http://www.kafeitu.me/activiti/2013/03/10/integrate-activiti-modeler.html

activit 5.12.1集成activiti-modeler 到 自己的业务系统(集成流程跟踪-完美支持IE) http://jhaij.iteye.com/blog/1871635
根据第二篇文章，整合成功;

FAQ:
1. 无法进入editor.
http://localhost:8080/YouPRJ/modeler/service/editor?id=2050，前提是这个id必需存在与act_re_model表里面，
那么，在调用这个之前，如何插入一条记录到这个表么?
待解决........
-------------
看到咖啡兔的例子，是先使用java保存到数据库，然后再打开editor, 保存的代码：
javascript: 一边保存，一边打开，同时保存后的页面又做reload, 很特别很有趣的做法，值得学习....

$(function() {
    	$('#create').button({
    		icons: {
    			primary: 'ui-icon-plus'
    		}
    	}).click(function() {
    		$('#createModelTemplate').dialog({
    			modal: true,
    			width: 500,
    			buttons: [{
    				text: '创建',
    				click: function() {
    					if (!$('#name').val()) {
    						alert('请填写名称！');
    						$('#name').focus();
    						return;
    					}
                        setTimeout(function() {
                            location.reload();
                        }, 1000);
    					$('#modelForm').submit();
    				}
    			}]
    		});
    	});
    });

@RequestMapping(value = "create", method = RequestMethod.POST)
  public void create(@RequestParam("name") String name, @RequestParam("key") String key, @RequestParam("description") String description,
          HttpServletRequest request, HttpServletResponse response) {
    try {
      ObjectMapper objectMapper = new ObjectMapper();
      ObjectNode editorNode = objectMapper.createObjectNode();
      editorNode.put("id", "canvas");
      editorNode.put("resourceId", "canvas");
      ObjectNode stencilSetNode = objectMapper.createObjectNode();
      stencilSetNode.put("namespace", "http://b3mn.org/stencilset/bpmn2.0#");
      editorNode.put("stencilset", stencilSetNode);
      Model modelData = repositoryService.newModel();

      ObjectNode modelObjectNode = objectMapper.createObjectNode();
      modelObjectNode.put(ModelDataJsonConstants.MODEL_NAME, name);
      modelObjectNode.put(ModelDataJsonConstants.MODEL_REVISION, 1);
      description = StringUtils.defaultString(description);
      modelObjectNode.put(ModelDataJsonConstants.MODEL_DESCRIPTION, description);
      modelData.setMetaInfo(modelObjectNode.toString());
      modelData.setName(name);
      modelData.setKey(StringUtils.defaultString(key));

      repositoryService.saveModel(modelData);
      repositoryService.addModelEditorSource(modelData.getId(), editorNode.toString().getBytes("utf-8"));

      response.sendRedirect(request.getContextPath() + "/service/editor?id=" + modelData.getId());
    } catch (Exception e) {
      logger.error("创建模型失败：", e);
    }
  }

2. web editor保存的bpmn20文件到哪里去了？
     会更新ACT_RE_MODEL和ACT_GE_BYTEARRAY表，ACT_GE_BYTEARRAY表保存了图片和xml文件信息( 其实是json格式的字符串)，并关联到ACT_RE_MODEL表。
     ACT_RE_MODEL
       说明：流程设计器设计流程后，保存数据到该表。
                EDITOR_SOURCE_VALUE_ID（流程文件放在ACT_GE_BYTEARRAY中的ID）；
                EDITOR_SOURCE_EXTRA_VALUE_ID(流程文件图像放在ACT_GE_BYTEARRAY中的ID)。

3. 如何去部署保存在数据库里面的ACT_RE_MODEL表里面的工作流？
    咖啡兔的源码： 创建，部署，删除，导出，遍历

package me.kafeitu.demo.activiti.web.workflow;

import java.io.ByteArrayInputStream;
import java.util.List;

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

import org.activiti.bpmn.converter.BpmnXMLConverter;
import org.activiti.bpmn.model.BpmnModel;
import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.editor.language.json.converter.BpmnJsonConverter;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.Model;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.node.ObjectNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

/**
 * 流程模型控制器
 * 
 * @author henryyan
 */
@Controller
@RequestMapping(value = "/workflow/model")
public class ModelController {

  protected Logger logger = LoggerFactory.getLogger(getClass());

  @Autowired
  RepositoryService repositoryService;

  /**
   * 模型列表
   */
  @RequestMapping(value = "list")
  public ModelAndView modelList() {
    ModelAndView mav = new ModelAndView("workflow/model-list");
    List<Model> list = repositoryService.createModelQuery().list();
    mav.addObject("list", list);
    return mav;
  }

  /**
   * 创建模型
   */
  @RequestMapping(value = "create", method = RequestMethod.POST)
  public void create(@RequestParam("name") String name, @RequestParam("key") String key, @RequestParam("description") String description,
          HttpServletRequest request, HttpServletResponse response) {
    try {
      ObjectMapper objectMapper = new ObjectMapper();
      ObjectNode editorNode = objectMapper.createObjectNode();
      editorNode.put("id", "canvas");
      editorNode.put("resourceId", "canvas");
      ObjectNode stencilSetNode = objectMapper.createObjectNode();
      stencilSetNode.put("namespace", "http://b3mn.org/stencilset/bpmn2.0#");
      editorNode.put("stencilset", stencilSetNode);
      Model modelData = repositoryService.newModel();

      ObjectNode modelObjectNode = objectMapper.createObjectNode();
      modelObjectNode.put(ModelDataJsonConstants.MODEL_NAME, name);
      modelObjectNode.put(ModelDataJsonConstants.MODEL_REVISION, 1);
      description = StringUtils.defaultString(description);
      modelObjectNode.put(ModelDataJsonConstants.MODEL_DESCRIPTION, description);
      modelData.setMetaInfo(modelObjectNode.toString());
      modelData.setName(name);
      modelData.setKey(StringUtils.defaultString(key));

      repositoryService.saveModel(modelData);
      repositoryService.addModelEditorSource(modelData.getId(), editorNode.toString().getBytes("utf-8"));

      response.sendRedirect(request.getContextPath() + "/service/editor?id=" + modelData.getId());
    } catch (Exception e) {
      logger.error("创建模型失败：", e);
    }
  }

  /**
   * 根据Model部署流程
   */
  @RequestMapping(value = "deploy/{modelId}")
  public String deploy(@PathVariable("modelId") String modelId, RedirectAttributes redirectAttributes) {
    try {
      Model modelData = repositoryService.getModel(modelId);
      ObjectNode modelNode = (ObjectNode) new ObjectMapper().readTree(repositoryService.getModelEditorSource(modelData.getId()));
      byte[] bpmnBytes = null;

      BpmnModel model = new BpmnJsonConverter().convertToBpmnModel(modelNode);
      bpmnBytes = new BpmnXMLConverter().convertToXML(model);

      String processName = modelData.getName() + ".bpmn20.xml";
      Deployment deployment = repositoryService.createDeployment().name(modelData.getName()).addString(processName, new String(bpmnBytes)).deploy();
      redirectAttributes.addFlashAttribute("message", "部署成功，部署ID=" + deployment.getId());
    } catch (Exception e) {
      logger.error("根据模型部署流程失败：modelId={}", modelId, e);
    }
    return "redirect:/workflow/model/list";
  }

  /**
   * 导出model的xml文件
   */
  @RequestMapping(value = "export/{modelId}")
  public void export(@PathVariable("modelId") String modelId, HttpServletResponse response) {
    try {
      Model modelData = repositoryService.getModel(modelId);
      BpmnJsonConverter jsonConverter = new BpmnJsonConverter();
      JsonNode editorNode = new ObjectMapper().readTree(repositoryService.getModelEditorSource(modelData.getId()));
      BpmnModel bpmnModel = jsonConverter.convertToBpmnModel(editorNode);
      BpmnXMLConverter xmlConverter = new BpmnXMLConverter();
      byte[] bpmnBytes = xmlConverter.convertToXML(bpmnModel);

      ByteArrayInputStream in = new ByteArrayInputStream(bpmnBytes);
      IOUtils.copy(in, response.getOutputStream());
      String filename = bpmnModel.getMainProcess().getId() + ".bpmn20.xml";
      response.setHeader("Content-Disposition", "attachment; filename=" + filename);
      response.flushBuffer();
    } catch (Exception e) {
      logger.error("导出model的xml文件失败：modelId={}", modelId, e);
    }
  }

  @RequestMapping(value = "delete/{modelId}")
  public String delete(@PathVariable("modelId") String modelId) {
     repositoryService.deleteModel(modelId);
    return "redirect:/workflow/model/list";
  }

}

问题：
1. java.lang.NoSuchMethodError: org.activiti.engine.impl.bpmn.diagram.ProcessDiagramCanvas.drawSequenceflowWithoutArrow(IIIIZZ)V
应为本地有两个工程的pom.xml都使用了

        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-engine</artifactId>
            <version>${activiti.version}</version>
        </dependency>

临时关闭或者删除一个工程，就不会提示这个错误了，至于为什么？我也搞不清楚。。。网上几乎没有人碰到这个错误，莫非是我太幸运???