camunda - 在 Spring Boot 中部署流畅的 BPMN 模型 API

Question

我想问一下spring boot中使用流畅的BPMN模型API的camunda流程。 设置自动部署和重新部署（版本控制）的最佳做法是什么？

@Configuration
public class BpmProcess {

    private final Log logger = LogFactory.getLog(getClass());

    @Autowired
    private ProcessEngine processEngine;

    @Bean
    public BpmnModelInstance bpmnModelInstance() {
        BpmnModelInstance modelInstance = Bpmn.createExecutableProcess("esign-store")
                .name("esign store document")
                .startEvent("esign-startEvent")
                .serviceTask("esign-uploadStorage")
                    .name("upload to storage")
                    .camundaAsyncBefore()
                    .camundaDelegateExpression("${uploadStorageDelegate}")
                .serviceTask("esign-uploadCezar")
                    .name("upload to cezar")
                    .camundaAsyncBefore()
                    .camundaDelegateExpression("${uploadCezarDelegate}")
                .endEvent("esign-endEvent")
                    .camundaAsyncBefore()
                    .messageEventDefinition("esign-endEventDefinition")
                .done();

        MessageEventDefinition event = modelInstance.getModelElementById("esign-endEventDefinition");
        event.setCamundaDelegateExpression("${endReplyDelegate}");
        Bpmn.writeModelToStream(System.out, modelInstance);

        return modelInstance;

    }

    @PostConstruct
    public void deploy(){
        processEngine.getRepositoryService()
                .createDeployment()
                .addModelInstance("esign-store.bpmn", bpmnModelInstance())
                .name("esign-store-service")
                .deploy();
    }

}

不知道对不对。

Answer 1

@PostConstruct 太早了，你必须等到引擎设置好并运行。使用 camunda spring boot，您可以监听 PostDeployEvent 并将其用作钩子：

 @SpringBootApplication
 @EnableProcessApplication
 public class MyApp {
   ...
   @EventListener
   public void onStart(PostDeployEvent event) {
       // deploy here
   }
 }