jsf method not found Exception though it is there, javax.el.MethodNotFoundException

Question

I got following JSF construct:

index.xhtml:

<h:form>
    <h:commandButton class="btn btn-success pull-left left-puffer right-puffer" value="Test" action="#{bean.debugCode()}" />
</h:form>

bean.java => bean which is used between view and DataBaseController

package db_container;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

@ManagedBean(name = "bean")
@SessionScoped

public class Bean {
/*
 * VARIABLES
 */
// Database
private DataBaseController xy = null;

/*
 * CONSTRUCTOR
 */
public Bean() throws Exception {
    this.xy = new DataBaseController();     
}

/*
 * METHODS
 */

public void debugCode() {
    xy.DebugtoDB("DEBUG", "hallo", "welt", "neu");
 }
}

Stack Trace:

WARNING: #{bean.debugCode()}:
javax.el.MethodNotFoundException: /index.xhtml @330,139 action="
{bean.debugCode}": Method not found:
[email protected]()
javax.faces.FacesException: #{bean.debugCode()}: javax.el.MethodNotFoundException: /index.xhtml @330,139 action="#{bean.debugCode}": Method not found: [email protected]()
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:110)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at net.sourceforge.spnego.SpnegoHttpFilter.doFilter(SpnegoHttpFilter.java:318)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:491)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:764)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1388)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)

Now when I start the view and click on the button, the exception appears. Unfortunately it does not seem logic to me, since there is the function in the bean, which is ready to call.

What am I doing wrong?

Answer 1

Your method expects a boolean value:

public void debugCode(Boolean test) {
    xy.DebugtoDB("DEBUG", "hallo", "welt", "neu");
 }

In that case, the method call in your xhtml must actually pass a true or false value like this:

<h:form>
    <h:commandButton class="btn btn-success pull-left left-puffer right-puffer" value="Test" action="#{bean.debugCode(true)}" />
</h:form>