资讯推荐:boot-admin整合flowable官方editor-app源码进行BPMN2-0建模（续）

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来源：博客园时间：2023-04-22 09:03:46

boot-admin整合flowable官方editor-app源码进行BPMN2-0建模（续）书接上回

项目源码仓库github项目源码仓库gitee

(资料图)

boot-admin是一款采用前后端分离模式、基于SpringCloud微服务架构的SaaS后台管理框架。系统内置基础管理、权限管理、运行管理、定义管理、代码生成器和办公管理6个功能模块，集成分布式事务Seata、工作流引擎Flowable、业务规则引擎Drools、后台作业调度框架Quartz等，技术栈包括Mybatis-plus、Redis、Nacos、Seata、Flowable、Drools、Quartz、SpringCloud、Springboot Admin Gateway、Liquibase、jwt、Openfeign、I18n等。

在上一篇博文中，已经介绍了 boot-admin 对 editor-app 前端代码的集成改造，接下来我们看看后端代码。

提供汉化资源json数据

/**     * 获取汉化资源     * @return     */    @RequestMapping(value = "/editor/stencilset", method = RequestMethod.GET, produces = "application/json;charset=utf-8")    public String getStencilset() {        InputStream stencilsetStream = this.getClass().getClassLoader().getResourceAsStream("stencilset.json");        try {            return IOUtils.toString(stencilsetStream, "utf-8");        } catch (Exception e) {            throw new FlowableException("Error while loading stencil set", e);        }    }

资源包stencilset.json需放在resources文夹下，这里提供下载：点击下载汉化包

分页获取模型列表

controller：

@RequestMapping("/api/workflow/auth/activiti")@RestController@Slf4jpublic class ModelController extends BaseController {    @Resource    private FormValidator formValidator;    @Autowired    private MyModelService modelService;    @PostMapping("/model/page")    @ApiOperation("分页获取项目数据表列表")    public ResultDTO getTablePage(@Valid @RequestBody ModelQueryVO queryVO, BindingResult bindingResult) throws Exception {        if (bindingResult.hasErrors()) {            return formValidator.generateMessage(bindingResult);        }        return modelService.getPage(queryVO);    }}

service:

@Override    public ResultDTO getPage(ModelQueryVO queryVO) throws Exception {        int offset = (queryVO.getCurrentPage() - 1) * queryVO.getPageSize() + 0;        List list = repositoryService.createModelQuery().listPage(offset                , queryVO.getPageSize());        int total = (int) repositoryService.createModelQuery().count();        Page page = new Page<>();        page.setRecords(list);        page.setTotal(total);        return ResultDTO.success(page);    }

读取模型数据

controller：

@RequestMapping("/api/workflow/auth/activiti")@RestController@Slf4jpublic class ModelController extends BaseController {    @Autowired    private RepositoryService repositoryService;    @Autowired    private ObjectMapper objectMapper;    /**     * 获取用于编辑的模型JSON数据     * @param modelId 模型ID     * @return     */    @GetMapping(value = "/model/json")    public ObjectNode getEditorJson(@RequestParam("modelId") String modelId) {        ObjectNode modelNode = null;        Model model = repositoryService.getModel(modelId);        if (model != null) {            try {                if (StringUtils.isNotEmpty(model.getMetaInfo())) {                    modelNode = (ObjectNode) objectMapper.readTree(model.getMetaInfo());                } else {                    modelNode = objectMapper.createObjectNode();                    modelNode.put(MODEL_NAME, model.getName());                }                modelNode.put(MODEL_ID, model.getId());                ObjectNode editorJsonNode = (ObjectNode) objectMapper.readTree(                        new String(repositoryService.getModelEditorSource(model.getId()), "utf-8"));                modelNode.put("model", editorJsonNode);            } catch (Exception e) {                log.error("Error creating model JSON", e);                throw new FlowableException("Error creating model JSON", e);            }        }        return modelNode;    }}

增加新模型

controller：

@RequestMapping("/api/workflow/auth/activiti")@RestController@Slf4jpublic class ModelController extends BaseController {    @Resource    private FormValidator formValidator;    @Autowired    private MyModelService modelService;        @PostMapping("/model/add")    @ApiOperation("保存数据")    public ResultDTO save(@Valid @RequestBody ModelDataVO dataVO, BindingResult bindingResult) throws Exception {        if (bindingResult.hasErrors()) {            return formValidator.generateMessage(bindingResult);        }        BaseUser baseUser = UserTool.getBaseUser();        return modelService.addNewModel(dataVO, baseUser);    }}

service：

@Override    public ResultDTO addNewModel(ModelDataVO dataVO, BaseUser baseUser) throws Exception {        //初始化一个空模型        Model model = repositoryService.newModel();        //设置一些默认信息        String name = dataVO.getName();        String description = dataVO.getDescription();        int revision = 1;        String key = dataVO.getKey();        ObjectNode modelNode = objectMapper.createObjectNode();        modelNode.put(MODEL_NAME, name);        modelNode.put(MODEL_DESCRIPTION, description);        modelNode.put(ModelDataJsonConstants.MODEL_REVISION, revision);        model.setName(name);        model.setKey(key);        model.setMetaInfo(modelNode.toString());        repositoryService.saveModel(model);        String id = model.getId();        //完善ModelEditorSource        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);        repositoryService.addModelEditorSource(id, editorNode.toString().getBytes("utf-8"));        return ResultDTO.success(id);    }

保存模型数据

/**     * 保存模型数据     * @param modelId     * @param name     * @param description     * @param json_xml     * @param svg_xml     */    @RequestMapping(value = "/model/save", method = RequestMethod.PUT)    @ResponseStatus(value = HttpStatus.OK)    public void saveModel(@RequestParam("modelId") String modelId            , String name, String description            , String json_xml, String svg_xml) {        try {            Model model = repositoryService.getModel(modelId);            ObjectNode modelJson = (ObjectNode) objectMapper.readTree(model.getMetaInfo());            modelJson.put(MODEL_NAME, name);            modelJson.put(MODEL_DESCRIPTION, description);            model.setMetaInfo(modelJson.toString());            model.setName(name);            repositoryService.saveModel(model);            repositoryService.addModelEditorSource(model.getId(), json_xml.getBytes("utf-8"));            InputStream svgStream = new ByteArrayInputStream(svg_xml.getBytes("utf-8"));            TranscoderInput input = new TranscoderInput(svgStream);            PNGTranscoder transcoder = new PNGTranscoder();            // Setup output            ByteArrayOutputStream outStream = new ByteArrayOutputStream();            TranscoderOutput output = new TranscoderOutput(outStream);            // Do the transformation            transcoder.transcode(input, output);            final byte[] result = outStream.toByteArray();            repositoryService.addModelEditorSourceExtra(model.getId(), result);            outStream.close();        } catch (Exception e) {            log.error("Error saving model", e);            throw new FlowableException("Error saving model", e);        }    }

删除模型

controller：

@RequestMapping("/api/workflow/auth/activiti")@RestController@Slf4jpublic class ModelController extends BaseController {    @Resource    private FormValidator formValidator;    @Autowired    private MyModelService modelService;        @PostMapping("/model/del")    @ApiOperation("删除数据")    public ResultDTO del(@Valid @RequestBody GuidContainerVO guidContainerVO, BindingResult bindingResult) throws Exception {        if (bindingResult.hasErrors()) {            return formValidator.generateMessage(bindingResult);        }        return modelService.delete(guidContainerVO.getGuid());    }    }

service：

@Override    public ResultDTO delete(String guid) throws Exception {        repositoryService.deleteModel(guid);        return ResultDTO.success();    }

发布（部署）模型

@RequestMapping("/api/workflow/auth/activiti")@RestController@Slf4jpublic class ModelController extends BaseController {    @Resource    private FormValidator formValidator;    @Autowired    private MyModelService modelService;       @PostMapping("/model/deploy")    public ResultDTO deploy(@Valid @RequestBody GuidContainerVO guidContainerVO, BindingResult bindingResult) throws Exception {        if (bindingResult.hasErrors()) {            return formValidator.generateMessage(bindingResult);        }        return modelService.deploy(guidContainerVO.getGuid());    }}

service：

@Override    public ResultDTO deploy(String guid) throws Exception {        /**获取模型 **/        Model modelData = repositoryService.getModel(guid);        byte[] bytes = repositoryService.getModelEditorSource(modelData.getId());        if (bytes == null) {            return ResultDTO.failureCustom("模型数据为空，请先设计流程并成功保存，再进行发布。");        }        JsonNode modelNode = new ObjectMapper().readTree(bytes);        BpmnModel model = new BpmnJsonConverter().convertToBpmnModel(modelNode);        if (model.getProcesses().size() == 0) {            return ResultDTO.failureCustom("数据模型不符要求，请至少设计一条主线流程。");        }        /** 设置名称 **/        if(StringUtils.isNotBlank(modelData.getCategory())) {            model.setTargetNamespace(modelData.getCategory());        }        byte[] bpmnBytes = new BpmnXMLConverter().convertToXML(model);        /** 发布流程 .bpmn20.xml必需加 **/        String processName = modelData.getName() + ".bpmn20.xml";        Deployment deployment = repositoryService.createDeployment()                .name(modelData.getName())                .category(modelData.getCategory())                .key(modelData.getKey())                .addString(processName, new String(bpmnBytes, "UTF-8"))                .deploy();        modelData.setDeploymentId(deployment.getId());        repositoryService.saveModel(modelData);        return ResultDTO.success();    }

总结：经过集成改造，boot-admin与flowable editor-app模型设计器实现紧密整合，不但实现了BPMN流程编辑、修改、发布等功能，还实现前端携带jwt按权限访问后端资源。boot-admin 集成 flowable editor-app 运行效果如下图所示：

项目源码仓库github项目源码仓库gitee

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