在另一个未完成时创建一个新的 FlowScoped bean

Question

我正在 weblogic 上使用 JSF (Primeface) 和 j2ee。

所以，我的应用程序中有两个不同的流程：

流程配置：

public class RequestFlow implements Serializable {
@Produces
@FlowDefinition
public Flow defineFlow(@FlowBuilderParameter FlowBuilder flowBuilder) {
    String flowId = "requestFlow";
    flowBuilder.id("", flowId);
    flowBuilder.viewNode(flowId, "/inside/customer/request/flow/requestFlow.xhtml").markAsStartNode();
    flowBuilder.viewNode("requestFlowCart", "/inside/customer/request/flow/requestFlowCart.xhtml");
    flowBuilder.viewNode("requestFlowCheckout", "/inside/customer/request/flow/requestFlowCheckout.xhtml");
    flowBuilder.returnNode("finishRequest").fromOutcome("/inside/customer/request/requests.xhtml");

    return flowBuilder.getFlow();
}
}

CDI 的流 bean：

@Named
@FlowScoped("requestFlow")
public class RequestFlowBean implements Serializable {
   //some logic
}

第二种配置：

public class OrderFlow 实现 Serializable {

@Produces
@FlowDefinition
public Flow defineFlow(@FlowBuilderParameter FlowBuilder flowBuilder) {
    String flowId = "orderFlow";
    flowBuilder.id("", flowId);
    flowBuilder.viewNode(flowId, "/inside/customer/order/flow/orderFlow.xhtml").markAsStartNode();
    flowBuilder.viewNode("orderFlowSelectRequests", "/inside/customer/order/flow/orderFlowSelectRequests.xhtml");
    flowBuilder.viewNode("orderFlowReviewRequests", "/inside/customer/order/flow/orderFlowReviewRequests.xhtml");
    flowBuilder.viewNode("orderFlowCheckoutOrder", "/inside/customer/order/flow/orderFlowCheckoutOrder.xhtml");
    flowBuilder.returnNode("finishOrder").fromOutcome("/inside/customer/order/orders.xhtml");

    return flowBuilder.getFlow();
}
}

CDI 的流 bean：

@Named
@FlowScoped("orderFlow")
public class OrderFlowBean implements Serializable {
    //some logic
}

我的案例：

用户打开页面，点击 h:button 启动 "requestFlow"（未完成！）
使用菜单导航到另一个页面，通过单击 h:button 尝试启动 "orderFlow"。

问题： "OrderFlow" 没有在控制台中没有任何错误的情况下启动！第一个流还在内存中，但根据文档，它必须被销毁。

所以，我希望能够在其他 bean 未完成时创建一个新的 FlowScoped bean。

有什么建议吗？

Answer 1

所以，正好在 2 个月内我找到了答案。诀窍在于你如何开始你的流程。如果您想要运行新的 JSF 流程，而没有完成其他流程，则必须从 JSF 上下文中删除任何流程的先前实例。为此，您在控制器中添加了方法：

public String initFlow() {
    FacesContext context = FacesContext.getCurrentInstance();
    FlowHandler handler = context.getApplication().getFlowHandler();

    ExternalContext extContext = context.getExternalContext();
    String sessionKey = extContext.getClientWindow().getId() + "_flowStack";
    Map<String, Object> sessionMap = extContext.getSessionMap();
    if (sessionMap.containsKey(sessionKey)) {
        sessionMap.remove(sessionKey);
    }
    handler.transition(context, null, handler.getFlow(context, "", getFlowName()), null, "");
    return getFlowName();
}

并按以下方式启动流量页：

<p:commandButton value="Start Flow"
    action="#{controller.initFlow}"/>
</p:panelGrid>

在另一个未完成时创建一个新的 FlowScoped bean

Create a new FlowScoped bean when other one was not finished

jsf

cdi

flow-scope

jakarta-ee