SpringBoot整合Flowable工作流-3（全局事件监听）

左手的ㄟ右手 2022-10-06 11:46 309阅读 0赞

![在这里插入图片描述][20210613115736784.png]

### 文章目录 ###

*  1. 前言
 *  2. 代码实现
 *   *  2.1 实现 FlowableEventListener 接口
     *  2.2 添加全局事件监听器
 *  3. SpringBoot整合Flowable工作流相关文章

# 1. 前言 #

> 上一篇博客【[SpringBoot整合Flowable工作流-2（代码整合）][SpringBoot_Flowable_-2] 】介绍代码整合部分。
> 
> --------------------
> 
> 这篇博客主要介绍 Flowable 的全局事件监听器，并且基于事件监听器实现业务的通知等业务。

# 2. 代码实现 #

## 2.1 实现 FlowableEventListener 接口 ##

@Component
    @Slf4j
    public class FlowableBaseEventListenerImpl implements FlowableEventListener { 
    
        @Autowired
        private FlowableTaskCreatedCallback flowableTaskCreatedCallback;
        @Autowired
        private FlowableTaskCompletedCallback flowableTaskCompletedCallback;
        @Autowired
        private FlowableInstanceFinishedCallback flowableInstanceFinishedCallback;
        @Autowired
        private FlowableInstanceDeletedCallback flowableInstanceDeletedCallback;
        //
        @Autowired
        private RuntimeService runtimeService;
        @Autowired
        private RepositoryService repositoryService;
        @Qualifier("processEngine")
        @Autowired
        private ProcessEngine processEngine;
        @Autowired
        private TaskService taskService;
        @Autowired
        protected ManagementService managementService;
        @Autowired
        protected HistoryService historyService;
        @Autowired
        private AuthHelper authHelper;
    
        @Override
        public void onEvent(FlowableEvent event) { 
            FlowableEventType type = event.getType();
            ProcessInstanceNotifyRequestDTO requestDTO = null;
            if (type == FlowableEngineEventType.TASK_CREATED) { 
                // 用户任务创建完成
                if (event instanceof org.flowable.common.engine.impl.event.FlowableEntityEventImpl) { 
                    org.flowable.common.engine.impl.event.FlowableEntityEventImpl eventImpl = (org.flowable.common.engine.impl.event.FlowableEntityEventImpl) event;
                    TaskEntityImpl taskEntity = (TaskEntityImpl) eventImpl.getEntity();
                    requestDTO = flowableTaskCreatedCallback.call(eventImpl, taskEntity);
                }
            } else if (type == FlowableEngineEventType.TASK_COMPLETED) { 
                // 用户审批任务
                if (event instanceof org.flowable.engine.delegate.event.impl.FlowableEntityWithVariablesEventImpl) { 
                    org.flowable.engine.delegate.event.impl.FlowableEntityWithVariablesEventImpl eventImpl = (org.flowable.engine.delegate.event.impl.FlowableEntityWithVariablesEventImpl) event;
                    TaskEntityImpl taskEntity = (TaskEntityImpl) eventImpl.getEntity();
                    requestDTO = flowableTaskCompletedCallback.call(eventImpl, taskEntity);
                }
            } else if (type == FlowableEngineEventType.PROCESS_COMPLETED) { 
                // 流程完成
                if (event instanceof org.flowable.engine.delegate.event.impl.FlowableEntityEventImpl) { 
                    org.flowable.engine.delegate.event.impl.FlowableEntityEventImpl eventImpl = (org.flowable.engine.delegate.event.impl.FlowableEntityEventImpl) event;
                    ExecutionEntityImpl taskEntity = (ExecutionEntityImpl) eventImpl.getEntity();
                    requestDTO = flowableInstanceFinishedCallback.call(eventImpl, taskEntity);
                }
            } else if (type == FlowableEngineEventType.PROCESS_CANCELLED) { 
                // 流程删除
                if (event instanceof org.flowable.engine.delegate.event.impl.FlowableProcessCancelledEventImpl) { 
                    org.flowable.engine.delegate.event.impl.FlowableProcessCancelledEventImpl eventImpl = (org.flowable.engine.delegate.event.impl.FlowableProcessCancelledEventImpl) event;
                    requestDTO = flowableInstanceDeletedCallback.call(eventImpl, null);
                }
            }
            if (requestDTO != null) { 
                BpmnModel bpmnModel = repositoryService.getBpmnModel(requestDTO.getProcessDefinitionId());
                Map<String, String> dataObjectMap = bpmnModel.getMainProcess().getDataObjects().stream()
                        .collect(Collectors.toMap(v -> v.getId(), v -> v.getValue() == null ? "" : v.getValue().toString()));
                String businessNotifyUri = dataObjectMap.get(WorkflowConstants.BUSINESS_NOTIFY_URI);
                //
                log.info("processInstanceId:[{}] businessNotifyUri: [{}], requestDTO: {}",
                         requestDTO.getProcessInstanceId(),
                         businessNotifyUri,
                         JSON.toJSONString(requestDTO));
                //
                if (StringUtils.isNotEmpty(businessNotifyUri)) { 
                    if (businessNotifyUri.startsWith("/")) { 
                        HttpServletRequest request = SpringContextUtil.getHttpServletRequest();
                        String origin = request.getHeader("gateway-forwarded-origin");
                        //
                        businessNotifyUri = origin + businessNotifyUri;
                    }
                    //
                    ProcessInstanceNotifyRequestDTO finalRequestDTO = requestDTO;
                    String finalBusinessNotifyUri = businessNotifyUri;
                    String token = authHelper.getToken();
                    //noinspection AlibabaAvoidManuallyCreateThread
                    new Thread(() -> { 
                    	// TODO 以后完善为线程池异步
                        try { 
                            Thread.sleep(2000);
                            // 延迟2秒
                        } catch (InterruptedException e) { 
                            e.printStackTrace();
                        }
                        String data = "";
                        try (FastHttpClient httpClient = FastHttpClient.builder().build()) { 
                            //
                            Map<String, String> queryMap = finalRequestDTO.toMap();
                            queryMap.put("sign", WorkflowSignerUtil.sign(WorkflowSignerUtil.mapToSignText(queryMap), finalRequestDTO.getProcessInstanceId()));
                            //
                            StringJoiner joiner = new StringJoiner("&");
                            queryMap.forEach((key, val) -> joiner.add(key + "=" + URLEncoder.ALL.encode(val == null ? "" : val, StandardCharsets.UTF_8)));
                            HttpGet httpGet = httpClient.buildGet(finalBusinessNotifyUri + "?" + joiner.toString());
                            httpGet.setHeader(Constant.TOKEN_NAME, token);
                            Response<String> response = httpClient.execute(httpGet, ResponseHandler.ofString(StandardCharsets.UTF_8));
                            data = response.getData();
                        } catch (Exception e) { 
                            log.warn("", e);
                            data = e.getMessage();
                        }
                        data = StringUtils.abbreviate(data, 1000);
                        log.info("processInstanceId:[{}] notify response: {}", finalRequestDTO.getProcessInstanceId(), data);
                    }).start();
                }
            }
    
        }
    
        @Override
        public boolean isFailOnException() { 
            return false;
        }
    
        @Override
        public boolean isFireOnTransactionLifecycleEvent() { 
            return false;
        }
    
        @Override
        public String getOnTransaction() { 
            return null;
        }
    }

## 2.2 添加全局事件监听器 ##

@Slf4j
    @Component
    @Configuration
    public class InitConfig implements CommandLineRunner { 
    
        @Autowired
        private RuntimeService runtimeService;
        @Autowired
        private FlowableBaseEventListenerImpl flowableBaseEventListener;
        
        @Override
        public void run(String... args) { 
            runtimeService.addEventListener(flowableBaseEventListener);
        }
        
    }

# 3. SpringBoot整合Flowable工作流相关文章 #

*  [SpringBoot整合Flowable工作流-1（画流程定义）][SpringBoot_Flowable_-1]
 *  [SpringBoot整合Flowable工作流-2（代码整合）][SpringBoot_Flowable_-2]
 *  [SpringBoot整合Flowable工作流-3（全局事件监听）][SpringBoot_Flowable_-3]

--------------------

*  公众号：IT加载中（it\_loading）
 *  CSDN：https://blog.csdn.net/JinglongSource
 *  博客：https://ihouyu.cn/
 *  邮箱：for.houyu@qq.com

[20210613115736784.png]: /images/20221005/17ac31f8d89f41c988f59b968b578418.png
[SpringBoot_Flowable_-2]: https://blog.csdn.net/JinglongSource/article/details/117444554
[SpringBoot_Flowable_-1]: https://blog.csdn.net/JinglongSource/article/details/117397879
[SpringBoot_Flowable_-3]: https://blog.csdn.net/JinglongSource/article/details/117871594