package me.kafeitu.demo.activiti.web.workflow;
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import java.io.ByteArrayInputStream;
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import java.util.List;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import com.fasterxml.jackson.databind.JsonNode;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.fasterxml.jackson.databind.node.ObjectNode;
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import org.activiti.bpmn.converter.BpmnXMLConverter;
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import org.activiti.bpmn.model.BpmnModel;
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import org.activiti.editor.constants.ModelDataJsonConstants;
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import org.activiti.editor.language.json.converter.BpmnJsonConverter;
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import org.activiti.engine.RepositoryService;
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import org.activiti.engine.repository.Deployment;
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import org.activiti.engine.repository.Model;
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import org.apache.commons.io.IOUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.annotation.PathVariable;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestMethod;
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import org.springframework.web.bind.annotation.RequestParam;
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import org.springframework.web.servlet.ModelAndView;
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import org.springframework.web.servlet.mvc.support.RedirectAttributes;
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/**
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* 流程模型控制器
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*
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* @author henryyan
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*/
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@Controller
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@RequestMapping(value = "/workflow/model")
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public class ModelController {
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protected Logger logger = LoggerFactory.getLogger(getClass());
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@Autowired
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RepositoryService repositoryService;
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/**
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* 模型列表
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*/
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@RequestMapping(value = "list")
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public ModelAndView modelList() {
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ModelAndView mav = new ModelAndView("workflow/model-list");
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List<Model> list = repositoryService.createModelQuery().list();
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mav.addObject("list", list);
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return mav;
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}
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/**
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* 创建模型
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*/
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@RequestMapping(value = "create", method = RequestMethod.POST)
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public void create(@RequestParam("name") String name, @RequestParam("key") String key, @RequestParam("description") String description,
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HttpServletRequest request, HttpServletResponse response) {
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try {
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ObjectMapper objectMapper = new ObjectMapper();
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ObjectNode editorNode = objectMapper.createObjectNode();
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editorNode.put("id", "canvas");
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editorNode.put("resourceId", "canvas");
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ObjectNode stencilSetNode = objectMapper.createObjectNode();
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stencilSetNode.put("namespace", "http://b3mn.org/stencilset/bpmn2.0#");
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editorNode.put("stencilset", stencilSetNode);
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Model modelData = repositoryService.newModel();
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ObjectNode modelObjectNode = objectMapper.createObjectNode();
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modelObjectNode.put(ModelDataJsonConstants.MODEL_NAME, name);
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modelObjectNode.put(ModelDataJsonConstants.MODEL_REVISION, 1);
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description = StringUtils.defaultString(description);
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modelObjectNode.put(ModelDataJsonConstants.MODEL_DESCRIPTION, description);
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modelData.setMetaInfo(modelObjectNode.toString());
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modelData.setName(name);
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modelData.setKey(StringUtils.defaultString(key));
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repositoryService.saveModel(modelData);
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repositoryService.addModelEditorSource(modelData.getId(), editorNode.toString().getBytes("utf-8"));
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response.sendRedirect(request.getContextPath() + "/service/editor?id=" + modelData.getId());
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} catch (Exception e) {
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logger.error("创建模型失败：", e);
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}
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}
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/**
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* 根据Model部署流程
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*/
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@RequestMapping(value = "deploy/{modelId}")
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public String deploy(@PathVariable("modelId") String modelId, RedirectAttributes redirectAttributes) {
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try {
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Model modelData = repositoryService.getModel(modelId);
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ObjectNode modelNode = (ObjectNode) new ObjectMapper().readTree(repositoryService.getModelEditorSource(modelData.getId()));
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byte[] bpmnBytes = null;
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BpmnModel model = new BpmnJsonConverter().convertToBpmnModel(modelNode);
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bpmnBytes = new BpmnXMLConverter().convertToXML(model);
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String processName = modelData.getName() + ".bpmn20.xml";
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Deployment deployment = repositoryService.createDeployment().name(modelData.getName()).addString(processName, new String(bpmnBytes)).deploy();
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redirectAttributes.addFlashAttribute("message", "部署成功，部署ID=" + deployment.getId());
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} catch (Exception e) {
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logger.error("根据模型部署流程失败：modelId={}", modelId, e);
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}
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return "redirect:/workflow/model/list";
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}
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/**
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* 导出model的xml文件
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*/
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@RequestMapping(value = "export/{modelId}")
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public void export(@PathVariable("modelId") String modelId, HttpServletResponse response) {
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try {
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Model modelData = repositoryService.getModel(modelId);
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BpmnJsonConverter jsonConverter = new BpmnJsonConverter();
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JsonNode editorNode = new ObjectMapper().readTree(repositoryService.getModelEditorSource(modelData.getId()));
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BpmnModel bpmnModel = jsonConverter.convertToBpmnModel(editorNode);
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BpmnXMLConverter xmlConverter = new BpmnXMLConverter();
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byte[] bpmnBytes = xmlConverter.convertToXML(bpmnModel);
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ByteArrayInputStream in = new ByteArrayInputStream(bpmnBytes);
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IOUtils.copy(in, response.getOutputStream());
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String filename = bpmnModel.getMainProcess().getId() + ".bpmn20.xml";
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response.setHeader("Content-Disposition", "attachment; filename=" + filename);
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response.flushBuffer();
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} catch (Exception e) {
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logger.error("导出model的xml文件失败：modelId={}", modelId, e);
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}
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}
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@RequestMapping(value = "delete/{modelId}")
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public String delete(@PathVariable("modelId") String modelId) {
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repositoryService.deleteModel(modelId);
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return "redirect:/workflow/model/list";
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}
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}
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