Camunda ProcessDefinition 在部署后不可用

Question

我有一个 Camunda 7.3 独立 h2-in-mem 配置，我想将其集成到我自己的应用程序中。当我基于（有效）bpmn xml 字符串创建部署时，我没有得到任何流程定义作为回报：

public String deployProcess(WorkflowDef workflowDef) throws IOException, SQLException {
    //prepare resources
    String name = workflowDef.getTitle()+".bpmn";
    InputStream stream = new ByteArrayInputStream(workflowDef.getBpmnXml().getBytes(Charset.defaultCharset()));

    //prepare deployment
    RepositoryService repositoryService = processEngine.getRepositoryService();
    final DeploymentBuilder deploymentBuilder = repositoryService.createDeployment();
    deploymentBuilder.name(workflowDef.getId());
    DeploymentEntity deploymentResult;

    try {
        deploymentResult = (DeploymentEntity) repositoryService.createDeployment().addInputStream(name, stream).deploy();
    } finally {
        stream.close();
    }

    //read the result
    String deploymentId = deploymentResult.getId();
    ProcessDefinition processDef = repositoryService.createProcessDefinitionQuery().deploymentId(deploymentId).singleResult();

    //return the process definition id for later query
    String processDefinitionId = processDef.getId();
    return processDefinitionId;
}

注意： 对象workflowDef 只是一个包装器，其中包含来自bpmn.io 建模器的定义，例如名称和作为字符串的bpmn XML。我还确保引擎和数据库已初始化并运行。

部署后，我在该行收到 NullPointerException

String processDefinitionId = processDef.getId();

即使我尝试通过

获取定义

repositoryService.createProcessDefinitionQuery().list();

我刚刚收到一个空列表。我的代码中是否存在误解？

Answer 1

您似乎忘记了已部署流程定义上的

isExecutable

标志。请检查您的流程模型是否包含

isExecutable

标志。如果您使用 camunda 建模器，只需在流程的属性面板中设置此选项即可。