Dispatch[/ActionName ] to method method1 returned an exception

[Rajeev Ja]

Hi,
whenever i am creating new instance of form it is required because form contains a constructor while it is using getters and setters of another dto.then form is coming as null.
our formbean is like
public class Person extends ActionForm
{
private PatientDetail patientDetail;
}
public class PatientDetail extends ActionForm
{
private String patientId;
}
How to acess patientId in JSTL
requestParameter.patientDetail.patientId
Please reply.

Thanks and Regards
Rajeev

[Chris Boldon]

If you are using JSTL you do not use ActionForms. You add your object to the request as an Attribute.

[Brent Sterling]

I am not quite sure what you are asking. I would think that your form would have to have a parameter-less constructor (or no constructors with parameters specified). Otherwise I do not think that Struts would be able to instantiate your form. Also, I am not sure you really want both Person and PatientDetail to extend ActionForm. It might be better design to have PersonForm class which contained a Person (or a PatientDetail).

- Brent

[Chris Boldon]

Map your form to a bean, then set the bean as an attribute.
[ October 19, 2007: Message edited by: Chris Boldon ]

[Rajeev Ja]

Thanks for the replies
but i have made all the changes but it is throwing null pointer exception
get me some code of that kind

[Chris Boldon]

Which variable is coming up as null? Post your code.

[Myyron Murray Latorilla]

Hi, im also receiving this message in glassfish whenever I create a JSONObject object.

Sample log:
Dispatch[/role] to method 'getUsers' returned an exception
java.lang.reflect.InvocationTargetException

Sample code:
public ActionForward getUsers(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
throws Exception {
response.setContentType("text/html;charset=utf-8");

JSONObject json = new JSONObject(); //HERE IS WHERE THE EXCEPTION IS OCCURRING
json.put("userName", "Juan dela Cruz");
json.put("userID", "12345");
json.put("role", "System Administrator");
json.put("active", "true");
response.getWriter().write((new StringBuilder("[")).append(json.toString()).append("]").toString());

return null;
}

Any idea why this exception is occurring?..Thanks in advance

[Chris Boldon]

myyron latorilla wrote:Hi, im also receiving this message in glassfish whenever I create a JSONObject object.

Sample log:
Dispatch[/role] to method 'getUsers' returned an exception
java.lang.reflect.InvocationTargetException

Sample code:
public ActionForward getUsers(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
throws Exception {
response.setContentType("text/html;charset=utf-8");

JSONObject json = new JSONObject(); //HERE IS WHERE THE EXCEPTION IS OCCURRING
json.put("userName", "Juan dela Cruz");
json.put("userID", "12345");
json.put("role", "System Administrator");
json.put("active", "true");
response.getWriter().write((new StringBuilder("[")).append(json.toString()).append("]").toString());

return null;
}

Any idea why this exception is occurring?..Thanks in advance

Can you debug the call? It's really hard to tell what's going on with a basic Exception and no stack track. Where exactly is the exception being thrown, and what is the complete stack trace when the exception is thrown?

[Myyron Murray Latorilla]

Nevermind Chris, I've already found the problem. It's my fault that I rushed to use the JSON library without reading its documentation first. Found from log that there were missing classes and needs the following jars inorder for it to work.

- commons-lang-2.4.jar
- commons-collections-3.2.1.jar
- ezmorph-1.0.jar

Anyway, thanks for your time man.

Before I forgot, heres the trace of the exception.
[#|2009-12-10T20:22:53.221+0800|SEVERE|sun-appserver2.1|org.apache.struts.actions.DispatchAction|_ThreadID=23;_ThreadName=httpSSLWorkerThread-8108-2;_RequestID=1bc6ac94-7be0-41b3-af14-621827cc9dc9;|Dispatch[/role] to method 'getUsers' returned an exception
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:269)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:170)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:315)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:287)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:218)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:98)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:222)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:166)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:288)
at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:647)
at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:579)
at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:831)
at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)
at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)
at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableRuntimeException
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at com.sun.enterprise.loader.EJBClassLoader.findClass(EJBClassLoader.java:688)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at com.onsemi.rdc.mes.webclmc.action.Role.getUsers(Role.java:27)
... 39 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeException
at com.sun.enterprise.loader.EJBClassLoader.findClassData(EJBClassLoader.java:738)
at com.sun.enterprise.loader.EJBClassLoader.findClass(EJBClassLoader.java:628)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 46 more
|#]