Amazon Simple Workflow和子工作流程

Question

我正在嘗試使用適用於AWS的Java流框架從亞馬遜簡單工作流服務中的工作流運行子工作流。 以下是主要的工作流程實施代碼：

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);

    }

}

主要工作流程中的活動正在運行，但是childorkflow（paymentProcessor）中的活動在引發某些錯誤后正在運行。

以下是錯誤消息-

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)

誰能幫我解決這個問題。 而且我也無法在互聯網上的AWS SWF服務中找到有關子工作流的任何適當文檔。 提前致謝。

Answer 1

該異常表示WorkflowWorker（決策程序）收到未配置為運行的工作流的決策任務。 我的猜測是，您有兩個WorkflowWorkers，一個用於父級工作流程，另一個用於子級工作流程，它們共享相同的任務列表名稱。 並且由於任務列表名稱相同，因此它們中的任何一個都可以從另一個任務中獲取任務。 因此，解決方案是向一個WorkflowWorker注冊兩個工作流，或者為每個工作人員使用不同的任務列表。 請注意，如果更改了任務列表名稱，則應該更改工作流程版本，因為一旦注冊，工作流程類型屬性就不會更改。