书接上回
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
@Slf4j
public 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<Model> list = repositoryService.createModelQuery().listPage(offset
, queryVO.getPageSize());
int total = (int) repositoryService.createModelQuery().count();
Page<Model> 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
@Slf4j
public 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
@Slf4j
public 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
@Slf4j
public 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
@Slf4j
public 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：
flow.gif
