Question

我正在尝试使用适用于AWS的Java流程框架从amazon简单工作流服务中的工作流运行子工作流。以下是主要的工作流程实现代码：

package SWF.ChildWorkFlow;

import org.springframework.core.annotation.Order;

import com.amazonaws.services.simpleworkflow.flow.core.Promise;

public class OrderWorkflowImpl implements OrderWorkflow {

    private OrderActivitiesClient client = new OrderActivitiesClientImpl();

    ProcessPaymentWorkflowClientFactory factory = new ProcessPaymentWorkflowClientFactoryImpl();

    @Override
    public void getCustomerOrder() {
        Promise<String> a = client.getOrder();


        ProcessPaymentWorkflowClient childWorkflowClient = factory.getClient("ChildWorkflow");
        childWorkflowClient.paymentProcessor(a);

    }

}

主要工作流程的活动正在运行，但来自childorkflow（paymentProcessor）的活动在抛出一些错误后正在运行。

下面是错误消息 -

Dec 08, 2014 3:11:21 PM com.amazonaws.services.simpleworkflow.flow.worker.AsyncDecisionTaskHandler createDecider
SEVERE: Received decision task for workflow type not configured with a worker: workflowType={Name: OrderWorkflow.getCustomerOrder,Version: 1.1}, taskToken=AAAAKgAAAAIAAAAAAAAAAjtd06ct8IXpzt5gbkfiKHXQbZci9kmJuSq1rKtpPVW+l+7hhLESuQDt5e3oVobCfbjEhfrRae26bnGLV3Kz2zsOUDBxpMGlFGReCBKeUc9BNGzKyOj4uiX5bPMdvez6zn8/Xfy69KTARDWvy15EsoP/4fp/9z3t4XJkzuk/Ks857gvtfNEZ1RfnlBqaqv2i9hpVBgHQXeoly0soewELhUxdOWHhYOxsGnGnM/MsEPFaXwKgzqwddXfuco7Pho0qle2xViYudOs7wcEECfi2Tgw=, workflowExecution={WorkflowId: workflow,RunId: 22fW/b5Qf+8M5AYj7S2PHY9N74LQGlouoWwszAFXH8VFI=}
Dec 08, 2014 3:11:21 PM com.amazonaws.services.simpleworkflow.flow.worker.DecisionTaskPoller pollAndProcessSingleTask
WARNING: DecisionTask failure: taskId= 9, workflowExecution={WorkflowId: workflow,RunId: 22fW/b5Qf+8M5AYj7S2PHY9N74LQGlouoWwszAFXH8VFI=}
java.lang.IllegalArgumentException: No implementation was found for {Name: OrderWorkflow.getCustomerOrder,Version: 1.1}
    at com.amazonaws.services.simpleworkflow.flow.worker.AsyncDecisionTaskHandler.createDecider(AsyncDecisionTaskHandler.java:111)
    at com.amazonaws.services.simpleworkflow.flow.worker.AsyncDecisionTaskHandler.handleDecisionTask(AsyncDecisionTaskHandler.java:49)
    at com.amazonaws.services.simpleworkflow.flow.worker.DecisionTaskPoller.pollAndProcessSingleTask(DecisionTaskPoller.java:201)
    at com.amazonaws.services.simpleworkflow.flow.worker.GenericWorker$PollServiceTask.run(GenericWorker.java:94)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Dec 08, 2014 3:11:21 PM com.amazonaws.services.simpleworkflow.flow.worker.GenericWorker uncaughtException
SEVERE: Failure in thread SWF Decider HelloWorldListParallel 1
java.lang.IllegalArgumentException: No implementation was found for {Name: OrderWorkflow.getCustomerOrder,Version: 1.1}
    at com.amazonaws.services.simpleworkflow.flow.worker.AsyncDecisionTaskHandler.createDecider(AsyncDecisionTaskHandler.java:111)
    at com.amazonaws.services.simpleworkflow.flow.worker.AsyncDecisionTaskHandler.handleDecisionTask(AsyncDecisionTaskHandler.java:49)
    at com.amazonaws.services.simpleworkflow.flow.worker.DecisionTaskPoller.pollAndProcessSingleTask(DecisionTaskPoller.java:201)
    at com.amazonaws.services.simpleworkflow.flow.worker.GenericWorker$PollServiceTask.run(GenericWorker.java:94)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

有谁可以帮我解决这个问题。而且我也无法在互联网上的AWS SWF服务中找到有关子工作流的任何适当文档。提前谢谢。

Answer 1

该异常意味着WorkflowWorker（决策者）接收未配置为运行的工作流的决策任务。我的猜测是，您有两个WorkflowWorkers，一个用于父级，另一个用于子工作流，共享相同的任务列表名称。并且由于任务列表名称相同，因此任何一个都可以从另一个获取任务。因此，解决方案是使用单个WorkflowWorker注册两个工作流，或者为每个工作者使用不同的任务列表。请注意，如果更改了任务列表名称，则应该使工作流程版本受到影响，因为一旦注册，工作流程类型属

Amazon Simple Workflow和子工作流程

1 个答案: