JSF 2 - Problem with ManagedBean

[Marcos Vidolin]

Hi guys

Does anyone know how to solve the following problem?
I am developing a simple project built on Maven and Eclipse. Using basically JSF 2 and RichFaces running in Jetty 6.

The project runs, the problem is when I try to access any ManagedBean. Where the following error appears in terminal:

GRAVE: javax.el.PropertyNotFoundException: /pages/commun/menu.xhtml @33,76 action="#{skinBean.configurarSkin}": Target Unreachable, identifier 'skinBean' resolved to null
javax.faces.el.EvaluationException: javax.el.PropertyNotFoundException: /pages/commun/menu.xhtml @33,76 action="#{skinBean.configurarSkin}": Target Unreachable, identifier 'skinBean' resolved to null
	at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:95)
	at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
	at javax.faces.component.UICommand.broadcast(UICommand.java:315)
	at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:787)
	at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1252)
	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:312)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401)
	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:326)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
	at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:945)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: javax.el.PropertyNotFoundException: /pages/commun/menu.xhtml @33,76 action="#{skinBean.configurarSkin}": Target Unreachable, identifier 'skinBean' resolved to null
	at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:107)
	at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
	... 23 more

It turns out that the ManagedBean is not initialized when the class is annotated with @ ManagedBean. If I map it using the faces-config.xml, the method is executed.

The following configuration files:

pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">  
    <modelVersion>4.0.0</modelVersion>  
    <groupId>br.com.plainproject</groupId>  
    <artifactId>plainproject</artifactId>  
    <packaging>war</packaging>  
    <version>1.0-SNAPSHOT</version>  
    <name>Plain Project Maven Webapp</name>  
    <url>http://maven.apache.org</url>  
  
    <repositories>  
        <repository>  
            <id>maven2-repository.dev.java.net</id>  
            <name>Java.net Repository for Maven</name>  
            <url>http://download.java.net/maven/2</url>  
        </repository>  
        <repository>  
            <id>jboss-public-repository-group</id>  
            <name>JBoss Public Maven Repository Group</name>  
            <url>https://repository.jboss.org/nexus/content/groups/public-jboss/</url>  
        </repository>  
    </repositories>  
  
    <properties>  
        <!-- Explicitly declaring the source encoding eliminates the following   
            message: [WARNING] Using platform encoding (UTF-8 actually) to copy filtered   
            resources, i.e. build is platform dependent! -->  
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  
        <java.version>1.6</java.version>  
        <richfaces.version>4.0.0.Final</richfaces.version>  
    </properties>  
  
    <dependencyManagement>  
        <dependencies>  
            <dependency>  
                <groupId>org.richfaces</groupId>  
                <artifactId>richfaces-bom</artifactId>  
                <version>${richfaces.version}</version>  
                <scope>import</scope>  
                <type>pom</type>  
            </dependency>  
        </dependencies>  
    </dependencyManagement>  
  
    <dependencies>  
        <!-- JSF 2 -->  
        <dependency>  
            <groupId>com.sun.faces</groupId>  
            <artifactId>jsf-api</artifactId>  
            <scope>compile</scope>  
        </dependency>  
  
        <dependency>  
            <groupId>com.sun.faces</groupId>  
            <artifactId>jsf-impl</artifactId>  
            <scope>compile</scope>  
        </dependency>  
  
        <dependency>  
            <groupId>javax.servlet</groupId>  
            <artifactId>jstl</artifactId>  
        </dependency>  
  
        <dependency>  
            <groupId>javax.servlet</groupId>  
            <artifactId>servlet-api</artifactId>  
        </dependency>  
  
        <dependency>  
            <groupId>taglibs</groupId>  
            <artifactId>standard</artifactId>  
            <scope>runtime</scope>  
            <version>1.1.1</version>  
        </dependency>  
  
        <dependency>  
            <groupId>taglibs</groupId>  
            <artifactId>c</artifactId>  
            <version>1.1.1</version>  
            <scope>runtime</scope>  
            <type>tld</type>  
        </dependency>  
  
        <dependency>  
            <groupId>com.sun.el</groupId>  
            <artifactId>el-ri</artifactId>  
            <version>1.0</version>  
        </dependency>  
  
        <dependency>  
            <groupId>javax.el</groupId>  
            <artifactId>el-api</artifactId>  
        </dependency>  
  
        <dependency>  
            <groupId>org.glassfish.web</groupId>  
            <artifactId>el-impl</artifactId>  
            <version>2.2.1-b05</version>  
        </dependency>  
  
        <!-- RichFaces -->  
        <dependency>  
            <groupId>org.richfaces.ui</groupId>  
            <artifactId>richfaces-components-ui</artifactId>  
        </dependency>  
        <dependency>  
            <groupId>org.richfaces.core</groupId>  
            <artifactId>richfaces-core-impl</artifactId>  
        </dependency>  
        <dependency>  
            <groupId>org.richfaces.cdk</groupId>  
            <artifactId>annotations</artifactId>  
            <version>${richfaces.version}</version>  
            <scope>provided</scope>  
        </dependency>  
  
        <!-- Hibernate -->  
        <dependency>  
            <groupId>org.hibernate</groupId>  
            <artifactId>hibernate-validator</artifactId>  
            <version>4.2.0.Final</version>  
        </dependency>  
  
        <!-- MySQL -->  
        <dependency>  
            <groupId>mysql</groupId>  
            <artifactId>mysql-connector-java</artifactId>  
            <version>5.1.18</version>  
        </dependency>  
  
        <!-- Teste -->  
        <dependency>  
            <groupId>junit</groupId>  
            <artifactId>junit</artifactId>  
            <version>3.8.1</version>  
            <scope>test</scope>  
        </dependency>  
  
        <!-- Log -->  
        <dependency>  
            <groupId>log4j</groupId>  
            <artifactId>log4j</artifactId>  
            <version>1.2.16</version>  
        </dependency>  
  
    </dependencies>  
  
    <build>  
        <finalName>plainproject</finalName>  
        <plugins>  
            <plugin>  
                <groupId>org.apache.maven.plugins</groupId>  
                <artifactId>maven-compiler-plugin</artifactId>  
                <version>2.3.1</version>  
                <configuration>  
                    <source>1.6</source>  
                    <target>1.6</target>  
                </configuration>  
            </plugin>  
              
            <!-- Eclipse plugin - download source and JavaDoc jars automatically -->  
            <plugin>  
                <groupId>org.apache.maven.plugins</groupId>  
                <artifactId>maven-eclipse-plugin</artifactId>  
                <configuration>  
                    <wtpversion>2.0</wtpversion>  
                    <downloadSources>true</downloadSources>  
                    <downloadJavadocs>true</downloadJavadocs>  
                </configuration>  
            </plugin>  
  
            <!-- Embedded Jetty (jetty:run) -->  
            <plugin>  
                <groupId>org.mortbay.jetty</groupId>  
                <artifactId>maven-jetty-plugin</artifactId>  
                <configuration>  
                    <!-- Delete this block to have Jetty run default port (8080) -->  
                    <connectors>  
                        <connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">  
                            <port>8080</port>  
                        </connector>  
                    </connectors>  
                    <!-- force friendly name instead of artifact name + version -->  
                    <contextPath>${project.build.finalName}</contextPath>  
                    <!-- Where the BeanManager is constructed. This is where you'll declare   
                        datasources. -->  
                    <jettyEnvXml>${basedir}/src/test/resources/jetty-env.xml</jettyEnvXml>  
                    <!-- This parameter will auto-deploy modified classes. -->  
                    <!-- You can save changes in a file or class and refresh your browser   
                        to view the changes. -->  
                    <scanIntervalSeconds>3</scanIntervalSeconds>  
                </configuration>  
            </plugin>  
        </plugins>  
    </build>  
</project>  

web.xml

<?xml version="1.0" encoding="UTF-8"?>  
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">  
  
    <display-name>Plain Project Web Application</display-name>  
  
    <!-- JSF -->  
    <context-param>  
        <param-name>javax.faces.PROJECT_STAGE</param-name>  
        <param-value>Development</param-value>  
    </context-param>  
    <servlet>  
        <servlet-name>Faces Servlet</servlet-name>  
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>  
        <load-on-startup>1</load-on-startup>  
    </servlet>  
    <servlet-mapping>  
        <servlet-name>Faces Servlet</servlet-name>  
        <url-pattern>*.jsf</url-pattern>  
        <url-pattern>*.xhtml</url-pattern>  
    </servlet-mapping>  
  
    <!-- Welcome page -->  
    <welcome-file-list>  
        <welcome-file>index.html</welcome-file>  
    </welcome-file-list>  
</web-app> 

bean

package br.com.plainproject.bean;

import java.io.Serializable;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;
import javax.faces.bean.SessionScoped;

@ManagedBean
@SessionScoped
public class SkinBean implements Serializable {

	private static final long serialVersionUID = 1L;

	private static final String OUT_COME_SKIN = "skin";

	@ManagedProperty(value = "blueSky")
	private String skin;

	public String getSkin() {
		return skin;
	}

	public void setSkin(String skin) {
		this.skin = skin;
	}

	public String configurarSkin() {
		return OUT_COME_SKIN;
	}
}

Thanks for help me.
[] 's

[Alexander Mitenko]

It seems like Jetty6 is not compliant with @ManagedBean annotation - they does not work correctly.
Try latest glassfish, jboss, weblogic containers.