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Issue with Vaanilla Struts 2/Hibernate CRUD example

Sean Romocki
Greenhorn

Joined: Oct 13, 2011
Posts: 2
Hello all,

I have been trying to build a struts 2/hibernate web application that is based off of this example:
http://www.vaannila.com/struts-2/struts-2-example/struts-2-crud-example-1.html

My problem is this same as this thread, but the solutions there did not work for me:
http://www.coderanch.com/t/528498/Struts/Struts-valuestack-error

I've been stuck on this for several days. Here are the different classes/config files/jsp of my code:

The model class: Dnis.java



The Controllers: DnisDAO.java & DnisDAOImpl.java





The Action class: DnisAction.java



The struts.xml



And finally the Jsp: index.jsp



I try and run the application and it gives me this stack trace:

  • SEVERE: Servlet.service() for servlet [jsp] in context with path [/IVRSupportv1.1] threw exception [tag 'push', field 'value': You must specify a value to push on the stack. Example: person - [unknown location]] with root cause
    tag 'push', field 'value': You must specify a value to push on the stack. Example: person - [unknown location]
    at org.apache.struts2.components.Component.fieldError(Component.java:230)
    at org.apache.struts2.components.Component.findValue(Component.java:351)
    at org.apache.struts2.components.Push.start(Push.java:128)
    at org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:53)
    at org.apache.jsp.index_jsp._jspx_meth_s_005fpush_005f0(index_jsp.java:183)
    at org.apache.jsp.index_jsp._jspx_meth_s_005fform_005f0(index_jsp.java:152)
    at org.apache.jsp.index_jsp._jspService(index_jsp.java:108)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:433)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:73)
    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:224)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:185)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:151)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:269)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)


  • Thanks for the help!!!
    Joe Ess
    Bartender

    Joined: Oct 29, 2001
    Posts: 8971
        
        9

    Looking at this error:
    tag 'push', field 'value': You must specify a value to push on the stack. Example: person - [unknown location]

    and the push tag documentation, my guess would be that a textfield tag is not a value and can't be pushed on the stack.


    [How To Ask Questions On JavaRanch]
    Sean Romocki
    Greenhorn

    Joined: Oct 13, 2011
    Posts: 2
    Hey Joe,

    Thanks for your response. I looked again at the Vaanilla exmaple and they used a textfield as part of the value in their example. The actual value is "value = user" in their example, or in my case "value = dnis" which is the Dnis.java object and the textfield names are the different fields. But anyways, maybe if I clarify how I want this page setup it will be easier for you to help me. These have to be textfields because they have to be user inputs.

    This .jsp page should have all the input text boxes for the addition of a Dnis object to the database at the top. Right below all the input fields is a submit button. Below that is the list of all the current records in the database. When I add a record the list should refresh with the new record included. If I click edit, the values of that object should be populated into the textfields. Now, when I click submit the record's info will be updated in the database and the list. I was thinking maybe there is a disconnect between the clicking the edit button and having those values populate the above textfields. But how do I make that linkage? I know this is super simple, but have pity for I'm just a humble greenhorn. Thanks for you help!
     
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    subject: Issue with Vaanilla Struts 2/Hibernate CRUD example