Wicket, WicketComponent

[locrianmode]

Hi,

I am getting an error in my Seam/Wicket application.

public class TimesheetApplication extends SeamWebApplication {

.
.
.


    @Override
    public RequestCycle newRequestCycle(final Request request, final Response response) {
        return new SeamWebRequestCycle(this, (WebRequest) request, (WebResponse) response) {

            @Override
            public Page onRuntimeException(Page page, RuntimeException e) {
                return new CustomeExceptionPage(e);
            }

        };
    }
}

I will get the errors if I try override methods in the SeamWebRequestCycle, even just putting an empty curly brackets gives the error

@Override
    public RequestCycle newRequestCycle(final Request request, final Response response) {
        return new SeamWebRequestCycle(this, (WebRequest) request, (WebResponse) response) 
        {}; // <--------
}

|SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
        at org.jboss.seam.wicket.WicketComponent.<init>(WicketComponent.java:171)
        at com.smoe.timesheet.web.wicket.TimesheetApplication$1.<clinit>(TimesheetApplication.java)
        at com.smoe.timesheet.web.wicket.TimesheetApplication.newRequestCycle100(TimesheetApplication.java:43)
        at com.smoe.timesheet.web.wicket.TimesheetApplication.newRequestCycle(TimesheetApplication.java)
        at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:351)
        at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:201)
        at org.jboss.seam.web.WicketFilter.doFilter(WicketFilter.java:132)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
|

Everything is fine if I just do this ...

@Override
    public RequestCycle newRequestCycle(final Request request, final Response response) {
        return new SeamWebRequestCycle(this, (WebRequest) request, (WebResponse) response);
}

Any pointers? Thanks.

[cpopetz]

It looks like your anonymous inner classes of your WebApplication subclass are being instrumented, which you do not want.  You need to exclude those classes from ending up in WEB-INF/wicket (or if you are using build-time instrumentation from the trunk, you need to exclude them in ant or maven.)

-Clint

[locrianmode]

Thanks Clint. Things are progressing a bit now :)

BTW, for those starting out using maven for your Seam/Wicket project, here's how I configure mine.

Check out an build the seam-instrument-wicket maven plugin from http://anonsvn.jboss.org/repos/seam/ (under maven-plugins/trunk).
Then you can use it in your maven project.

        <plugins>
            <plugin>
                <executions>
                    <execution>
                        <goals>
                            <goal>instrument</goal>
                        </goals>
                        <phase>compile</phase>
                    </execution>
                </executions>
                <groupId>org.jboss.seam</groupId>
                <artifactId>seam-instrument-wicket</artifactId>
                <version>2.1.2-SNAPSHOT</version>
                <configuration>
                    <scanAnnotations>false</scanAnnotations>
                    <includes>
                        <!-- include packages that need to be instrumented -->
                        <include>com.x.y.web.wicket.page.*</include>
                        <include>com.x.y.web.wicket.panel.*</include>
                    </includes>
                </configuration>
                <dependencies>
                    <dependency>
                        <!-- jars that your instrumented classes need -->
                        <groupId>javax.persistence</groupId>
                        <artifactId>persistence-api</artifactId>
                        <version>1.0</version>
                    </dependency>
                </dependencies>
            </plugin>

     .
     .
     .
     </plugins>

- Iskandar