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Target (session and entity java files) unreachable in JBoss Seam

开发者 https://www.devze.com 2023-02-20 16:46 出处：网络
I am new to JBoss Seam. I wanted to test some stuff on Eclipse so I created a new project and attached it to a mysql db. I then created a seam entity that I wanted to use to connect to my db. This sea
相关专题：jakarta-eejbossseam

I am new to JBoss Seam. I wanted to test some stuff on Eclipse so I created a new project and attached it to a mysql db. I then created a seam entity that I wanted to use to connect to my db. This seam entity created a .xhtml file and then a .java file. The problem am having now is that when I run the file to see whether I can persist in the db, I get the following error

Exception during request processing:
Caused by javax.servlet.ServletException with message: "/person.xhtml @21,67 value="#{personHome.instance.name}": Target Unreachable, identifier 'personHome' resolved to null"
javax.faces.webapp.FacesServlet.service(FacesServlet.java:277)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)
org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
java.lang.Thread.run(Thread.java:619)
Caused by javax.el.PropertyNotFoundException with message: "/person.xhtml @21,67 value="#{personHome.instance.name}": Target Unreachable, identifier 'personHome' resolved to null"
com.sun.facelets.el.TagValueExpression.getType(TagValueExpression.java:62)
com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getConvertedValue(HtmlBasicInputRenderer.java:92)
javax.faces.component.UIInput.getConvertedValue(UIInput.java:942)
javax.faces.component.UIInput.validate(UIInput.java:868)
javax.faces.component.UIInput.executeValidate(UIInput.java:1072)
javax.faces.component.UIInput.processValidators(UIInput.java:672)
javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1058)
javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1058)
javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1058)
javax.faces.component.UIForm.processValidators(UIForm.java:235)
org.ajax4jsf.component.AjaxViewRoot$3.invokeContextCallback(AjaxViewRoot.java:439)
org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:238)
org.ajax4jsf.component.AjaxViewRoot.processValidators(AjaxViewRoot.java:455)
com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)
org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilte开发者_JAVA技巧rChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
java.lang.Thread.run(Thread.java:619)

Please what could the problem be because I cannot see what am not doing well. Also when starting the server (JBoss), I got this warning 

[PersistentPermissionResolver] no permission store available - please install a PermissionStore with the name 'org.jboss.seam.security.jpaPermissionStore' if persistent permissions are required.

What is the cause of this warning and how can I eliminate it?

Thanks

Person.xhtml and Person.java files

<h:form id="personForm">

    <rich:panel>
        <f:facet name="header">person</f:facet>

        <s:decorate id="nameField" template="layout/edit.xhtml">
            <ui:define name="label">Name</ui:define>
            <h:inputText id="name" required="true"
                         value="#{personHome.instance.name}"/>
        </s:decorate>

        <div style="clear:both"/>

    </rich:panel>

    <div class="actionButtons">
        <h:commandButton id="save"
                      value="Save"
                     action="#{personHome.persist}"
                   rendered="#{!personHome.managed}"/>
        <h:commandButton id="update"
                      value="Save"
                     action="#{personHome.update}"
                   rendered="#{personHome.managed}"/>
        <h:commandButton id="delete"
                      value="Delete"
                     action="#{personHome.remove}"
                  immediate="true"
                   rendered="#{personHome.managed}"/>
        <s:button propagation="end"
                           id="cancel"
                        value="Cancel"
                         view="/personList.xhtml"/>
    </div>

</h:form>

and the java file

package org.domain.work.entity;

import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.GeneratedValue;
import javax.persistence.Version;
import org.hibernate.validator.Length;

@Entity
public class person implements Serializable
{
    // seam-gen attributes (you should probably edit these)
    private Long id;
    private Integer version;
    private String name;

    // add additional entity attributes

    // seam-gen attribute getters/setters with annotations (you probably should edit)

    @Id @GeneratedValue
    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    @Version
    public Integer getVersion() {
        return version;
    }

    private void setVersion(Integer version) {
        this.version = version;
    }

    @Length(max = 20)
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

}

personHome.java

package org.domain.work.session;

import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Begin;
import org.jboss.seam.annotations.web.RequestParameter;
import org.jboss.seam.framework.EntityHome;

import org.domain.work.entity.person;

@Name("personHome")
public class personHome extends EntityHome
{
    @RequestParameter Long personId;

    @Override
    public Object getId()
    {
        if (personId == null)
        {
            return super.getId();
        }
        else
        {
            return personId;
        }
    }

    @Override @Begin
    public void create() {
        super.create();
    }

}

In the file person.xhtml you use Seam component personHome, but these component is not define.

You can try find class PersonHome and add such adnotation:

@Name("personHome")
public class PersonHome {

Mayby some reference can help you:

  1. Registration example - simple Seam application

  2. Home objects - explanation of Home object

In your source file you have a few things that don't follow Java convetion and at least one error:

  1. The personHome component should be declare in that way:

    @Name("personHome")
public class PersonHome extends EntityHome<Person>

    You should add extend EntityHome class with your entity and use capital letter when you declare class name.

  2. You should also use capital letter when you declare Person class:

    @Entity
public class Person implements Serializable

  3. Problem with data source: plese check if you declare data source workDatasource and if proper file exist in your deploy directory. File with data source definition should have name which end -ds.xml. You can also past that file in your query.

Is your personHome class defined in the same project as the JSF pages?

I had a similar problem recently, based around my move to Maven. It turned out that the JBoss Seam jar was in the EAR lib directory and in the WAR web-inf/lib directory, and this caused a conflict.

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