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POa4j:ajax listener exception MethodNotFoundException
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  1. POa4j:ajax listener exception MethodNotFoundException
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    copied!<p>I started study RichFaces 4.2.2 and have a problem in simple example, I have an xml:</p> <pre><code>&lt;ui:define name="content"&gt; &lt;h:form&gt; &lt;rich:panel style="width: 50%"&gt; &lt;h:panelGrid columns="2"&gt; &lt;h:outputText value="Name:"/&gt; &lt;h:inputText id="inp" value="#{echoBean.name}"&gt; &lt;a4j:ajax event="keyup" render="echo count" listener="#{echoBean.countListener}"/&gt; &lt;/h:inputText&gt; &lt;h:outputText value="Echo:"/&gt; &lt;h:outputText id="echo" value="#{echoBean.name}"/&gt; &lt;h:outputText value="Count:"/&gt; &lt;h:outputText id="count" value="#{echoBean.count}"/&gt; &lt;/h:panelGrid&gt; &lt;a4j:commandButton value="Submit" actionListener="#{echoBean.countListener}" render="echo, count"/&gt; &lt;/rich:panel&gt; &lt;/h:form&gt; &lt;/ui:define&gt; </code></pre> <p></p> <p>and a simple bean:</p> <pre><code>@Component("echoBean") @Scope(value = "session") public class EchoBean { private String name; private Integer count = 0; //getter setter methods here public void countListener(ActionEvent event) { count++; } } </code></pre> <p>And when i try to print in inputText i have exception:</p> <pre><code>Caused by: javax.el.MethodNotFoundException: /home.xhtml @35,112 listener="#{echoBean.countListener}": Method not found: com.example.training.bean.EchoBean@d523fa.countListener() at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:102) at org.ajax4jsf.component.behavior.MethodExpressionAjaxBehaviorListener.processAjaxBehavior(MethodExpressionAjaxBehaviorListener.java:71) at javax.faces.event.AjaxBehaviorEvent.processListener(AjaxBehaviorEvent.java:113) at javax.faces.component.behavior.BehaviorBase.broadcast(BehaviorBase.java:98) at org.ajax4jsf.component.behavior.AjaxBehavior.broadcast(AjaxBehavior.java:348) at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:763) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:775) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1267) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82) ... 19 more </code></pre> <p>But why? With button this same listener works just fine and in docs for "listener" parameter in a4j:ajax it says that:</p> <p><em>The expression must evaluate to a public method that takes an ActionEvent parameter, with a return type of void, or to a public method that takes no arguments with a return type of void</em></p> <p>Why it uses <code>countListener()</code> without <code>ActionEvent</code> parameter? I don't get it.</p>
 

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