dream00csdn 2016-02-17
在Activiti Modeler尚未推出之前,我们使用Activiti进行流程设计的时候,优先会使用官方提供的Eclipse插件来进行设计,然后再通过代码把流程设计文件发布至系统中,然后再调用启动流程,这会导致一个问题,当我们需要进行流程修改的时候,麻烦来了,解决这种问题方案有以下方式:
1.重新在eclipse设计器流程,然后再次通过代码发布至系统中,然后再次执行。
2.通过自身开发的界面,在线重新设计
Activiti Modeler提供了我们一种全新的方式,即允许用户在eclipse中进行设计,然后再上传,上传后可直接转为Modeler的格式,可在Modeler中打开,然后再修改。
如我们上传eclipse设计器中的流程设计文件:
通过上传配置,把eclipse设计的文件上传:
通过代码可以转化为Activiti Modeler在线设计的文件格式:
通过这种方式可以有效实现eclipse设计,在线设计的相互转换.
eclipse转为Modeler的格式的转化代码如下:
import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.xml.stream.XMLInputFactory; import javax.xml.stream.XMLStreamReader; import org.activiti.bpmn.converter.BpmnXMLConverter; import org.activiti.bpmn.model.BpmnModel; import org.activiti.editor.language.json.converter.BpmnJsonConverter; import org.activiti.engine.RepositoryService; import org.activiti.engine.repository.Model; import org.apache.commons.lang.StringUtils; ... XMLInputFactory xif = XmlUtil.createSafeXmlInputFactory(); Map<String, MultipartFile> files = request.getFileMap(); Iterator<MultipartFile> it = files.values().iterator(); while(it.hasNext()){ MultipartFile f = it.next(); InputStream is = f.getInputStream(); InputStreamReader in = new InputStreamReader(is, "UTF-8"); XMLStreamReader xtr = xif.createXMLStreamReader(in); BpmnModel bpmnModel = new BpmnXMLConverter().convertToBpmnModel(xtr); if (bpmnModel.getMainProcess() == null || bpmnModel.getMainProcess().getId() == null) { msg="上传流程文件解析有问题!"; } else { BpmnJsonConverter converter = new BpmnJsonConverter(); ObjectNode modelNode = converter.convertToJson(bpmnModel); Model modelData = repositoryService.newModel(); ObjectNode modelObjectNode = new ObjectMapper().createObjectNode(); modelObjectNode.put("name", subject); modelObjectNode.put("revision", 1); modelObjectNode.put("documentation", bpmDef.getDescp()); modelData.setMetaInfo(modelObjectNode.toString()); modelData.setName(subject); modelData.setTenantId(ContextUtil.getCurrentTenantId()); repositoryService.saveModel(modelData); //modelNode.put("resourceId", modelData.getId()); logger.debug("json:"+modelNode.toString()); repositoryService.addModelEditorSource(modelData.getId(), modelNode.toString().getBytes("utf-8")); if(StringUtils.isEmpty(bpmDef.getDefId())){//创建新的流程定义 bpmDef.setMainDefId(idGenerator.getSID()); bpmDef.setModelId(modelData.getId()); bpmDefManager.createEntity(bpmDef); }else if("true".equals(isDeployNew)){//发布新的版本 //发布新的 bpmDefManager.doDeployNew(bpmDef, modelData.getId()); }else{//生成一新版本,关联该流程定义,不发布流程定义 bpmDefManager.doCopyNewVersion(bpmDef,modelData.getId()); } msg="成功上传BPMN流程文件!"; success=true; }
发布流程定义后,可以通过以下代码取到bpmn文件:
/** * 取得流程定义的XML * * @param deployId * @return */ public String getDefXmlByDeployId(String deployId){ String sql = "select a.* from ACT_GE_BYTEARRAY a where NAME_ LIKE '%bpmn20.xml' and DEPLOYMENT_ID_= ? "; final LobHandler lobHandler = new DefaultLobHandler(); // reusable final ByteArrayOutputStream contentOs = new ByteArrayOutputStream(); String defXml = null; try{ jdbcTemplate.query(sql, new Object[]{deployId },new AbstractLobStreamingResultSetExtractor<Object>(){ public void streamData(ResultSet rs) throws SQLException, IOException{ FileCopyUtils.copy(lobHandler.getBlobAsBinaryStream(rs, "BYTES_"), contentOs); } } ); defXml = new String(contentOs.toByteArray(), "UTF-8"); } catch (Exception ex){ ex.printStackTrace(); } return defXml; }
具体访问效果如:
http://www.redxun.cn:8020/saweb/login.jsp
访问流程管理—》流程定义设计