Hi,
We are trying to integrate WebWork 2 into our web application.
Incoming HTTP request are served by another framework (AbaXX). The integration occurs in a JSP through webwork:include tag. And there we get the following exception:
[Do Nov 27 15:32:04 CET] Error: payback: java.lang.NullPointerException
at com.opensymphony.webwork.dispatcher.SessionMap.entrySet(SessionMap.java:52)
at java.util.AbstractMap.containsKey(AbstractMap.java:131)
at com.loyaltypartner.lm.cms.ui.interceptor.PageflowInterceptor.before(PageflowInterceptor.java:33)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:36)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:116)
at com.opensymphony.webwork.dispatcher.ServletDispatcher.serviceAction(ServletDispatcher.java:181)
at com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:161)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:103)
at com.caucho.server.http.FilterChainServlet.doFilter(FilterChainServlet.java:96)
at com.caucho.server.http.Invocation.service(Invocation.java:315)
at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
at com.caucho.server.http.QRequestDispatcher.include(QRequestDispatcher.java:363)
at com.caucho.server.http.QRequestDispatcher.include(QRequestDispatcher.java:274)
at com.opensymphony.webwork.views.jsp.IncludeTag.include(IncludeTag.java:121)
at com.opensymphony.webwork.views.jsp.IncludeTag.doEndTag(IncludeTag.java:234)
at _templates._Funktion._render__jsp._jspService(_render__jsp.java:277)
at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
at com.caucho.jsp.Page.subservice(Page.java:506)
at com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:182)
at com.caucho.server.http.Invocation.service(Invocation.java:315)
at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
at com.caucho.server.http.QRequestDispatcher.include(QRequestDispatcher.java:363)
at com.caucho.server.http.QRequestDispatcher.include(QRequestDispatcher.java:274)
at com.caucho.jsp.QPageContext.include(QPageContext.java:546)
at _templates._Funktion._renderTeaser__jsp._jspService(_renderTeaser__jsp.java:57)
at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
What could it be? Is it because of the fact, that initial request processing does not go through WebWork Dispatcher?
If it could help I attach PageflowInterceptor.before method source code.
protected void before(ActionInvocation actionInvocation) throws Exception {
String ptoken = null;
Map pageflowContext = null;
Map requestParams = actionInvocation.getInvocationContext().getParameters();
Map sessionParams = actionInvocation.getInvocationContext().getSession();
if (!requestParams.containsKey("ptoken")) {
ptoken = GUID.generateGUID();
} else {
ptoken = requestParams.get("ptoken").toString();
}
if (!sessionParams.containsKey("pageflow" + ptoken)) { // <-------------------------------- here the exception occurs
pageflowContext = new HashMap();
sessionParams.put("pageflow" + ptoken, pageflowContext);
} else {
pageflowContext = (Map) sessionParams.get("pageflow" + ptoken);
}
Map p = new HashMap(2);
p.put("ptoken", ptoken);
p.put("pageflowContext", pageflowContext);
OgnlUtil.setProperties(p, actionInvocation.getAction(), ActionContext.getContext().getContextMap());
}
The idea of this interceptor is to have some Map where actions participating in a pageflow can share data. It is not acceptible to share that data through HTTP Session, because other actions from other pageflows can overwrite this data.
Viele Gruesse,
Sergiy
