在Wicket中阻止重複請求

Question

Wicket頁面的鏈接正在通過按數字鍵進行激活。 onClick()方法調用數據庫邏輯來保存一些值。 當用戶連續按下按鈕並且wicket在完成第一個請求之前收到一個請求時，會出現此問題。結果是StalePageException。

org.apache.wicket.request.mapper.StalePageException 
at org.apache.wicket.request.handler.PageProvider.getStoredPage(PageProvider.java:301) 
at org.apache.wicket.request.handler.PageProvider.resolvePageInstance(PageProvider.java:257) 
at org.apache.wicket.request.handler.PageProvider.getPageInstance(PageProvider.java:165) 
at org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.getPage(ListenerInterfaceRequestHandler.java:100) 
at org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:165) 
at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:784) 
at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64) 
at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:255) 
at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:212) 
at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:283) 
at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188) 
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:244) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198) 
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240) 
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164) 
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462) 
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164) 
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) 
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562) 
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395) 
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250) 
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188) 
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166) 
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) 
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) 
at java.lang.Thread.run(Thread.java:662) 

問題是如何過濾所有的請求，直到第一個完成？

Answer 1

在檢票用戶列表中提出了類似問題，答案是禁用組件/阻止進一步的交互，直到請求結束。

就你而言，僅僅刪除/阻止onClick()的行爲就足夠了。

• Double click on submit button
• Preventing double-click of AjaxButtons in ModalWindow
• How to prevent user from double-clicking a non-Ajax component

另外值得一提的是，如果請求是阿賈克斯，您可以在多個請求被髮送的場景指定拖放行爲，這樣，只處理最後一個。您可以通過覆蓋AbstractDefaultAjaxBehavior.getChannelName()並返回任何以|d結尾的內容來實現此目的。