I forgot to mention that my catch actually looks like
catch(Exception e)
{
writer.print("Component exception : " + e.getMessage());
...
}
so it seems that something is null that I don't expect. I do catch
visitObject == null so I wonder if it might be the snippetGetterMethod?
On 15 jun 2006, at 11.14, I wrote:
I've a strange problem that appears only if my Jetty server was idle
for some time. I get the following exception from one of my library
calls. Can anyone help me out here since I am having a hard time to
debug this (cannot reproduce so easily due to the idle nature of the
problem).
The component is located in a tapestry library and it uses invoke
to call a
database fetching method in the page's visit object. It works
perfect on
start and during the run of the server but fails after the test server
was idle for a long time.
<snip>
Source:
private static String snippetGetter = "getSnippetText";
private static Method snippetGetterMethod;
protected void renderComponent(IMarkupWriter writer, IRequestCycle
cycle)
{
IPage page = cycle.getPage();
Object visitObject = page.getVisit();
if(visitObject == null)
{
System.out.println("No visit object so far. Restarting page.");
throw new PageRedirectException(page);
}
Class visitClass = visitObject.getClass();
try
{
Class[] parameterTypes = new Class[] {String.class, Locale.class};
Object[] arguments = new Object[] {getSnippetID(),
getSnippetLocale()};
if(snippetGetterMethod == null)
snippetGetterMethod = visitClass.getMethod(snippetGetter,
parameterTypes);
>>> String txt = (String)snippetGetterMethod.invoke(visitObject,
arguments);
Trace:
Component exception : null
sun.reflect.GeneratedMethodAccessor211.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:585)
se.pardeike.tapestry.Extras.DBTextSnippet.DBTextSnippet.renderComponen
t(DBTextSnippet.java:43)
org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:
857)
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