JSF :: How To Access Application Scoped Bean From A Scheduled Job
Mar 29, 2015
I am coming from a Seam 2 and ATG background, and working on re-writing an old Seam 2 application using JSF 2 on Tomcat 8. I've run into a snag:
I have an application scoped managed bean, let's call it EMail. It holds a collection of Email objects, and does some other stuff.
I have an IMAPClient, which is currently setup as an application scoped managed bean (mostly to simply configuration, etc...).
I need to call a method on the IMAPClient to go check email every X seconds (let's call it 60 seconds), and add any new email into the Email managed bean's collection of email. In Seam 2 this was easy with the @Asynchronous annotation. In JSF 2 I can't figure out how to do it. I've tried using Quartz, which will happily run my IMAPCheckJob every 60 seconds, but I am so far unable to figure out how the IMAPCheckJob can get access to either the IMAPClient or the EMail beans.. There's no dependency injection into the Quartz Job, and since it's not executing in a HTTP request flow, there's no Faces context available.
It seems like there has to be some way to allow for scheduling and still have access to the benefits of the Application scoped managed bean DI system...
Or do I need to give up and move to JBoss with EJBs and CDI instead of JSF beans?
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Feb 18, 2015
I have an application scoped and i want to edit it from request scoped data. I use this code but application scoped data are not updating. What i am doing wrong?
Application Scoped Data
@ManagedBean
@ApplicationScoped
public class ApplicationData {
protected String contactEmail;
public String getContactEmail() {
return contactEmail;
[Code] ....
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Nov 26, 2014
I'm not able to access my bean class (not an EJB) using a given JNDI name in JBoss 5.0.1, where the same is working in Tommcat 7.0.
META-INF/context.xml
<Context>
<Resource name="test/TestDAO" auth="Container"
type="ws.jndi.MyBeanDAO"
factory="org.apache.naming.factory.BeanFactory"/>
[code]....
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Jan 10, 2010
I've got a CDI bean which is a facade for a JPA entity. Such entity has got a many to one relationship with itself and I've got the following method:
public Set<Account> getChildren() {
return this.children;
}
which is called in a JSF/Facelets page:
<h:commandLink action="#{accountController.destroy}" value="#{bundle.ListAccountDestroyLink}" rendered="#{item.children.size() == 0}"/>I then decided to return an unmodifiable set and changed getChildren() accordingly:
public Set<Account> getChildren() {
return Collections.unmodifiableSet(children);
}
The page now reports this error:
java.lang.IllegalAccessException: Class javax.el.BeanELResolver can not access a member of class java.util.Collections$UnmodifiableCollection with modifiers "public"
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:65)
at java.lang.reflect.Method.invoke(Method.java:588)
[Code] ....
javax.el.BeanELResolver is incorrectly failing because it's trying to invoke the size() method using reflection without correctly taking into account the method visibility (which is indeed invokable programmatically). I'm running NetBeans 6.8, Glassfish 3.0 and jdk1.6.0_17.
Is this a bug in BeanELResolver?
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Jan 30, 2015
When i create an application Bean how i can update it from another bean? Lets say application Bean has variable h=1 and i want to update from another bean and make it 2 how i can do it? And how i can access the value of a session bean from another bean?
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Feb 18, 2014
Class UserAssessBean{
private String username;
private int userid;
private ArrayList<ModuleBean> module;
--{get/set}--
[Code] ....
How can i access the getters/setters of module bean, when it was returned as array list in UserAssessBean?
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Sep 25, 2014
I do Java for decades, but am a FXML beginner. Currently I do FXMLLoader.load(fxmlFile) in Application.start(), which is working well. My Application instance is creating a background thread in Application.init() which feeds several custom application properties with incoming data taken from a remote model (wrapping a sensor hardware). Some of my windows shall later be able to access those properties. So the question is: How can I inject my Application instance into the FXMLLoader-created controller instances auto-bound to the FXML-created Scene instances?
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Oct 31, 2014
Is there any option to access OBIEE server home page through java, without sending username and password through URL.
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Jul 25, 2014
I have my own web application system now i want access a cash register machine from my web application to print receipt
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Feb 14, 2014
We generally use [URL] ..... for running web applications.
What I want is to access my web app using something like this: [URL] ....
How to achieve this? Actually what i want to ask is that how URL like WWW.example.com is mapped to web applications? Assuming that i am using tomcat server.
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Nov 13, 2014
I am new to JMS and Websphere server and I am trying to access a JMS queue configured on Websphere Application Server 8 from my Java code. But I am getting the exception mentioned below:
Exception in thread "main" java.lang.NoClassDefFoundError: com.ibm.ws.naming.util.CommonHelpers
at com.ibm.websphere.naming.WsnInitialContextFactory.getInitialContext(Unknown Source)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:230)
at javax.naming.InitialContext.initializeDefaultInitCtx(InitialContext.java:313)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:343)
at javax.naming.InitialContext.internalInit(InitialContext.java:281)
[code]...
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May 24, 2014
If I have the next request scoped JSF bean for example:
public class UserBean {
private String name;
private String surname;
public String saveUser(){
//service is called to save a user
}
public String updateUser(){
//service is called to update a user
[Code] ....
1.In struts for example the Action classes are singletons and I think is the way it has to be because they contain business logic and is the same logic for every user but in JSF because of you mix properties from a form and methods with business logic, these beans have to be request scoped like the above one but is very wierd that a bean which contains business logic(saveUser()....) be request scoped;I dont see it effective, is like creating a new servlet each time you want to save a user but I think is the way JSF works, right?
2 To avoid the mixing of form properties in a bean with business logic, some people say to have the form beans request scoped and actions beans session scoped.
- Is this right?
- How then can you get the request form bean in the action bean?
- The scopes in JSF are request, session and view so you cannot create singleton action beans, the best you can get is a session action bean, right?. Once again I dont see the point of creating action beans with session scoped,they should be application scoped if it existed
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Feb 23, 2013
I am doing this
@Startup
@Singleton
@ConcurrencyManagement(ConcurrencyManagementType.CONTAINER)
@Lock(LockType.READ)
public class ResourceBean {
[Code] ....
And I call this singleton bean from a stateless session bean like this
@Stateless
public class ClientBean {
@EJB
ResourceBean resource;
public String create(String r)
{
String res=resource.returnString(r);
return res;
}
}
But resource.returnString(r); gives a org.apache.jasper.JasperException: java.lang.NullPointerException I started the glassfish server in debug mode and found out that "resource" was null. but @PostConstruct in singleton does print which means singleton bean exists.
Can we call singleton beans with no interface in such a way form a session bean? I actually want to acquire instance of singleton bean when a client invokes method in Client bean...
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Nov 21, 2013
I'm new to JSP but I've to use it to grab data coming from an external site, pass data to a Bean, write data in a DB and redirect the user to another page. Follow the JSP page.
<%@page import="EJB.getResponse"%>
<%
long paymentID = Long.parseLong(request.getParameter("paymentid"));
String responsecode = "9999";
getResponse g = new getResponse();
[Code] ....
This is the bean:
@ManagedBean
@RequestScoped
public class getResponse implements Serializable {
private Long paymentId;
private String result;
private String auth;
[Code] ....
On the console I see the prints but I receive the NullPointerException
WARNING: StandardWrapperValve[jsp]: PWC1406: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at EJB.getResponse.printData(getResponse.java:72)
at org.apache.jsp.notify_jsp._jspService(notify_jsp.java from :60)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
[Code] ....
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Nov 9, 2014
I have tried this example ([URL].../) with CarDao extending the BaseDao, it works like a charm.However, from the CarDao class, my NetBeans underlined the class name “CarDao” with the error message “A session bean must not extend another session bean.” But I can compile, deploy and run the application without any problem.
I have also heard that a session bean cannot extend another session bean, but why it works here?
I am using Java EE 6, NetBeans 8.0.1 and WebLogic 12c for this code testing.
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Nov 17, 2014
convert or move standalone java thread application into Tomcat server container for accessing its JNDI services? Also is it possible to schedule this thread application in Tomcat server? is it possible to keep this app in tomcat as web application and schedule in window's scheduler.
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Mar 11, 2014
I am new to work on JNLP program. I have created a SWING program, JNLP file when i deploy the ear file i am getting 404 error. Please find the steps in details.
1.Created a dynamic web project JWStartProject in eclipse
2.Create a HelloWorld.java class under default package.
import javax.swing.*;
public class HelloWorld extends JFrame {
private static final long serialVersionUID = 4968624166243565348L;
private JLabel label = new JLabel("Hello Java Web START!");
public HelloWorld() {
super("Jave Web Start Example");
this.setSize(350, 200);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
this.setLayout(null);
[Code] ....
Now I exported this project as JWStartProject.war contains following code.
Created Server in Websphere Admin console
Deployed this war file under the server and started.
I have added MIME types also.
I am unable to launch the application. I am getting 404 errors. May I know where I went wrong?
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Aug 8, 2014
I have a managed bean for a form. I map the fields filled in the form with managed bean properties. when I submit the form and click new form , values from the previous form submitted gets displayed in the input fields. I used the scope of the from bean to session. what should be its scope so that values should be destroyed after I submit the form .For every new form ,new bean has to be initialized. On submit I navigate to another bean with session scope.
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Nov 7, 2014
Getting JS -> JSF value to Bean class? I have tried with below code:
JSF code:
<h:commandButton styleClass="buttonpos" value="Get Value" action="#{myBean.action}" onclick="document.getElementById('crForm:hiddenInput').value">
<h:inputHidden id="hiddenInput" value="#{myBean.action}"/>
</h:commandButton>
Java Beans
public class CurrencyExchangeBean {
protected static Logger logger = ILogger.getLogger(CurrencyExchangeBean.class);
[Code] .....
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May 11, 2014
Will it make any difference if I put the last line of code inside the useBean tag ?
<jsp:useBean id="person" class="foo.Person" scope="page" >
<jsp:setProperty name="person" property="name" value="Fred" />
</jsp:useBean>
<jsp:getProperty name="person" property="name" />
It gives me the same output though....
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Mar 29, 2014
I am working on eclipse kepler, JSF 2.2 with PrimeFaces 4.0 / Mojarra 2.2 library.
actually there are 2 Problems:
I still get this server message no matter what I do.
(( javax.el.PropertyNotFoundException: /Order.xhtml @28,76 value="#{kk.refugee.id}": Target Unreachable, 'refugee' returned null))
and if I delete the input text puls the hidden, the message keeps pop up for 'material' selectOneMenu. -
I have no chance to examin : ((is this javascript code correct, to copy the value of one component to the other.)) these are my xhtml file and java calsses.
**kk.java**
-----------
package khldqr.beans;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
@SessionScoped
@ManagedBean
public class kk {
[code]....
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Mar 7, 2014
I am new to JSF and was trying to find an example.
My question is in the processPage() method... how do i pass the managed bean to the ProjectDAO insert statement?
Faces-config.xml
<managed-bean>
<managed-bean-name>projectBean_backing</managed-bean-name>
<managed-bean-class>com.att.ped.backing.Project</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
[Code] .....
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Jun 5, 2014
I have a JSF bean which is request scope and corresponding JSF UI page. when user tries to open this page, we are getting exception 'Cannot instantiate user.java class <default constructor>'. This does not come always. It comes very rarely. JSF version is 1.2
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Feb 28, 2011
I have following bean:
public class LoginBean {
private String email;
private String password;
private SessionId sessionId;
private UserController userController;
public LoginBean() {
this.email = "";
this.password = "";
[code]....
And the jsp page is html and css and next part
<h:form id="form">
<p><h:inputText value="#{loginBean.email}" /></p>
<p><h:inputSecret value="#{loginBean.password}" /></p>
<p><h:message for="form"/></p>
<p><h:commandButton value="login" action="#{loginBean.login}" /></p>
</h:form>
I can't get the values out of the inputtext in any way?
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Mar 24, 2015
I'm trying to debug a program and I need to see the values in a Bean. I tried
" system.out.println("OrderManager.java: packagePricing, packBean= "+packBean);"
but that just gives me
"OrderManager.java: packagePricing, packBean=com.voxportal.web.device.PackageBean@73dde7ae"
which I think is a reference to the bean but not the actual contents of the Bean.
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Mar 6, 2014
I have a bean that represents data been collected from a form on a jsp page. Currently I would like to validate my fields and write some test cases for them. As you can see from my test case example I test a string in the hope that it fails because it contains only one letter. My problem is my unit test is passing. The reason this is from what I can tell is that at runtime it fails when I try to persist my object using my entity manager. During my unit test I just I don’t call my entity manager I just try and set the field.
What I thought would happen was that when I use my bean fields set method the annotations would be checked and fail at that point. Hence why I expected my unit test in this case to fail.
What I would like to know is
1.Are annotations specifically designed to validate when I persist my object and am I using them incorrectly at this point?
2.Is this the best method to use to validate fields, is there a better way, should I write my own code to validate for me when I set my value?
a. Should I throw an exception from the set method of each bean field?
Unit Test:
@Test
public void testName(){
Human h=new Human();
try {
h.setFname("a");
} catch (Exception e) {
// TODO Auto-generated catch block
fail("failed");
e.printStackTrace();
[code]....
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