Session bean behaves as ask the Bean

Similar Questions

• To access the Session Bean?

  Hello

  With the help of Jdev 11.1.1.7.0. mrequirement is I need to access session Bean on the Module of the Application.

  
  

  so I use this way in my implementation of the application module class .

  SessionBeanClassName sessionBeanClassObject is JsfUtils.getManagedBean ("recorded in the adfc-config sessionBeanName").

  I can able to access via the module of the application.

  My question is:

  1. is this good sense?

  2. No Impact on this approach?

  3. is this a good practice?

  4 is one way to access the variable from Session Bean on the application module.

  Thank you.

  Q2) the impact is that you break the mvc pattern and therefore the model of coupling to the display. Later, this can be a problem because your application doesn't fit. Add pass you ui state model (am) you might encounter problems when querying comes into play.

  Sample of Q4) Chris did not access to a bean in scope session leave an application module, but how to get there from an another view layer bean.

  Joel Ramamoorthy-Oracle and Cvele_new_account and myself you asked before, without a real use case all we can say is: don't access scope the model layer session bean.

  Timo

• [ADF, JDev12.1.3] Scope of session bean: it can contain attributes related to the Value property of user interface components?

  Hallo,

  I have a defined session bean in which I put a string attribute that is bound to the Value property of an InputText in my testPage.

  public class SessionClass {
  
    private String text;
  
    public void setText(String text) {
      this.text = text;
    }
  
    public String getText() {
      return text;
    }
  }
  

  

  When I run the testPage, it is not displayed.

  Perhaps this kind of linking is not possible?

  Thank you

  Federico

  Never use prefix in scope to the standard servlet scopes (request, session, application)

  So it would be: #{sessionClass.text}

  Dario

• Error during the generation of session bean

  Hi all
  
  EPCO: 12.1.1.1.0
  
  I created the entities JPA through the Assistant of "JPA entities from Tables" for employees and departments.
  Now, I want to create the bean in session using the Wizard "Session Bean of JPA entities.
  I give it a name and select all of the available features and click on "Finish". Then I got the following error:

  Error running the session bean generation task.

  In the console error log, I see the following:

  org.eclipse.core.commands.ExecutionException: 
       at oracle.eclipse.tools.webtier.ui.wizards.existing.EJBProjectFromExistingDataModelOperation.execute(EJBProjectFromExistingDataModelOperation.java:67)
       at oracle.eclipse.tools.adf.view.ui.internal.wizard.datamodel.NewSessionBeanFromEntitiesWizard.addEJBFacetOperation(NewSessionBeanFromEntitiesWizard.java:249)
       at oracle.eclipse.tools.adf.view.ui.internal.wizard.datamodel.NewSessionBeanFromEntitiesWizard.createNewServiceDefnAndGenBeans(NewSessionBeanFromEntitiesWizard.java:219)
       at oracle.eclipse.tools.adf.view.ui.internal.wizard.datamodel.NewSessionBeanFromEntitiesWizard.doFinish(NewSessionBeanFromEntitiesWizard.java:169)
       at oracle.eclipse.tools.adf.view.ui.internal.wizard.datamodel.NewSessionBeanFromEntitiesWizard.access$0(NewSessionBeanFromEntitiesWizard.java:160)
       at oracle.eclipse.tools.adf.view.ui.internal.wizard.datamodel.NewSessionBeanFromEntitiesWizard$1.run(NewSessionBeanFromEntitiesWizard.java:133)
       at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
  Caused by: org.eclipse.core.runtime.CoreException: 
       at oracle.eclipse.tools.webtier.ui.wizards.existing.EJBProjectConverter.convert(EJBProjectConverter.java:281)
       at oracle.eclipse.tools.webtier.ui.wizards.existing.EJBProjectFromExistingDataModelOperation.execute(EJBProjectFromExistingDataModelOperation.java:61)
       ... 6 more
  Caused by: java.lang.NullPointerException
       at org.eclipse.jst.j2ee.project.facet.J2EEModuleFacetInstallDataModelProvider.hasValidRuntime(J2EEModuleFacetInstallDataModelProvider.java:213)
       at org.eclipse.jst.j2ee.project.facet.J2EEModuleFacetInstallDataModelProvider.propertySet(J2EEModuleFacetInstallDataModelProvider.java:162)
       at org.eclipse.jst.j2ee.internal.ejb.project.operations.EjbFacetInstallDataModelProvider.propertySet(EjbFacetInstallDataModelProvider.java:137)
       at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelImpl.internalSetProperty(DataModelImpl.java:182)
       at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelImpl.setProperty(DataModelImpl.java:172)
       at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelImpl.setStringProperty(DataModelImpl.java:201)
       at oracle.eclipse.tools.webtier.ui.wizards.existing.EJBProjectConverter.convert(EJBProjectConverter.java:126)
       at oracle.eclipse.tools.webtier.ui.wizards.existing.EJBProjectConverter.convert(EJBProjectConverter.java:273)
       ... 7 more

  Anyone has any idea what happened and how can I fix?
  
  Thank you in advance.
  
  Filip Huysmans.

  To work around this problem, follow these steps:
  -On the model JPA project
  RT - click on, and then select Properties
  -Select project facets
  -Unlock and deselect the facet utility Module
  -Select the facet of the EJB Module and Oracle WebLogic EJB Extensions

  Your project must be ready to perform the given operation.

• Failed to retrieve the scope session bean

  Hello
  I'm working on JDeveloper 11.1.1.6.0.
  
  I use a session bean extended for the storage of information about the logged-on user. I have a page and a reading of the data of this extended session bean managed bean. It works very well. But now, I created another page also using the bean managed to read the data of the extended session bean. But he always returned null for the bean.
  
  Anyone has an idea why this might happen? It is not really clear to me why she is working with the first page and not with the second page, even when they both use the 'same' bean managed.
  
  Thanks in advance.
  Alex

  Alex,

  Kind of how convoluted to get a reference to a bean.

  Have you tried to create a managed property in the bean where is your code (set the value of the property #{SessionBean} in faces-config.) (XML)?

  John

• How to set the session bean of backing bean variable

  Hi all -
  
  I have a bean with a session variable and I want to set the value of this variable to a bean of support. Could someone please suggest how to achieve this.
  
  I use ADF 11 g.
  
  Greetings-
  Rohit

  Hello

  First of all, you need get the referral of bean in the bean to support session, and call the method that sets the value of the attribute. Getting session bean reference - you can use dependency injection, which is the best way, but you must register your bean in faces-config. XML (not adfc - config.xml, see http://biemond.blogspot.com/2010/04/ejb-injection-in-jsf-managed-bean.html).
  An alternative is to search the session bean's JNDI.
  Third option involves data controls: you create a session bean data control and then expose the method to fix your attribute value, in the calling page to jspx pageDef. To do this, you can't use method that begins with 'set', because you will not be able to exhibit in the pageDef (at least not with the Visual Editor). Then, you can call this method from the bean to support using this code:

          BindingContainer bindings = BindingContext.getCurrent().getCurrentBindingsEntry();
          OperationBinding operationBinding = bindings.getOperationBinding("yourSessionBeanMethodExposedInPageDef");
          operationBinding.execute();
  

  I hope this helps.
  Pedja

• Why the method in the several times called session bean

  Hello
  I work with Jdev 11 g.
  I created an example Web J2ee Application.
  In the model project, I created:
  1 - entity Bean
  2 - stateless session bean (which contains a method that get the list of username == > em.createNamedQuery("OsaUser.findAll").getResultList ();)
  
  In the view controller project I created:
  1 - managed bean, session scope, a getter that calls the session bean and retrieve the result of the query.
  2 - a JSF page with af:table element with the value bound to the list in the managed bean.
  
  When I run the application, the data is displayed, but since I put system.out message I get this message several times.
  When I try to debug the application the breakpoints on the managed bean and session bean are available several times.
  
  Can you please advice why this happens.
  Concerning
  Emile BITAR

  Hello

  partially, it's the cycle of life and partially a known bug. The method is called during ApplyRequest and RenderResponse. If you check this in your output, so you see that make answer calls at least three times, which is the bug that we set. As a temporary work around, set a flag within the scope of the request (since your bean's scope of session that you use a requestScope attribute). The first time you run, you set the attribute flag. So every time its called again, you check to see if the indicator exists and if ignore the request. Because the flag is set to request scope, you needn't clean it explicitly

  Frank

• Jdev 11 g, error when you try to run the session bean

  Hello
  
  I created a session façade for my entity beans. I don't know what happened but when I try to launch it I get the error below. I restarted my computer.
  
  Someone has an idea?
  Thank you.
  
  
  Redeploy the Application...
  < 7 May 2009 22:27:22 CEST > < WARNING > < hats > < BEA-149124 > < failures have been detected all introducing deploy task for application 'wd_tickets '. Error is: "[Deployer: 149164] modification of domain lock belongs to another session in exclusive mode - where the deployment operation cannot continue." >
  weblogic.management.ManagementException: [Deployer: 149164] modification of domain lock belongs to another session in exclusive mode - where the deployment operation cannot take place.
  # Incomplete deployment. # May 7, 2009 16:27:23
  oracle.jdeveloper.deploy.DeployException
  at oracle.jdevimpl.deploy.common.Jsr88RemoteDeployer.doDeploymentAction(Jsr88RemoteDeployer.java:247)
  at oracle.jdevimpl.deploy.common.Jsr88RemoteDeployer.deployImpl(Jsr88RemoteDeployer.java:157)
  at oracle.jdeveloper.deploy.common.AbstractDeployer.deploy(AbstractDeployer.java:94)
  at oracle.jdevimpl.deploy.fwk.WrappedDeployer.deployImpl(WrappedDeployer.java:39)
  at oracle.jdeveloper.deploy.common.AbstractDeployer.deploy(AbstractDeployer.java:94)
  at oracle.jdeveloper.deploy.common.BatchDeployer.deployImpl(BatchDeployer.java:82)
  at oracle.jdeveloper.deploy.common.AbstractDeployer.deploy(AbstractDeployer.java:94)
  at oracle.jdevimpl.deploy.fwk.WrappedDeployer.deployImpl(WrappedDeployer.java:39)
  at oracle.jdeveloper.deploy.common.AbstractDeployer.deploy(AbstractDeployer.java:94)
  at oracle.jdevimpl.deploy.fwk.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:436)
  at oracle.jdeveloper.deploy.DeploymentManager.deploy(DeploymentManager.java:209)
  at oracle.jdevimpl.runner.adrs.AdrsStarter$ $5 1.run(AdrsStarter.java:1365)
  Caused by: oracle.jdeveloper.deploy.DeployException
  at oracle.jdevimpl.deploy.common.Jsr88DeploymentHelper.redeployApplications(Jsr88DeploymentHelper.java:561)
  at oracle.jdevimpl.deploy.weblogic.common.Jsr88WeblogicDeploymentHelper.redeployApplications(Jsr88WeblogicDeploymentHelper.java:259)
  at oracle.jdevimpl.deploy.common.Jsr88RemoteDeployer.doDeploymentAction(Jsr88RemoteDeployer.java:222)
  ... 11 more
  Caused by: oracle.jdeveloper.deploy.DeployException: deployment failed
  at oracle.jdevimpl.deploy.common.Jsr88DeploymentHelper.redeployApplications(Jsr88DeploymentHelper.java:542)
  ... 13 more
  # Failed executing wd_tickets request because of the deployment error to DefaultServer.
  
  Published by: amcgator on May 7, 2009 13:38

  Once you start your weblogic Server

  Enter the URL: http://127.0.0.1:7101 / console

  username: weblogic
  password: weblogic

  hope this helps,

  Thank you

• Session Bean vs Entity Bean?

  We have a contractor who joined us recently. He is our specialist in the ADF. We don't know much about ADF. He said the layer of data model in the ADF, he must choose between the session beans and entity beans. I am especially ignorant of these things and their implications. I come to know objects entity and visualization of objects from access DB. Can someone give me an idea of what these are? Why not just create entity objects and some objects view and link as I always see in the tutorials? I would ask him, but I'm eager to check what it says of a 3rd party because it seems that it may be misleading us.

  He wants to use Java Beans EJB (Enterprise), while you tell the ADF business components

  Entity Beans

  What is an entity bean?

  https://blogs.Oracle.com/Shay/entry/adf_business_components_or_top

• [ADF, JDev12.1.3] viewScope bean can not recover sessionScope bean. Why? (How to day uploading of a session bean scope whenever a page with params is called)

  Hallo,

  to the login page of my application, I created a viewScope managed bean loginView.

  In the login page, I put a "dummy" inputText (whose value is related to dummyInitEditValue bean attr) to perform lazy loading of the page itself.

  In the initData() function I call a function of a bean sessionScope connection which should initlialize some of its attributes.

  public class LoginView {
    private Integer dummyInitEditValue;
  
    public LoginView() {
    }
  
    private void initData() {
      Login loginBean = (Login) FacesUtils.getManagedBeanInSession("login"); // loginBean = null !!!
      loginBean.initData();
      dummyInitEditValue = 1;
    }
  
    public void setDummyInitEditValue(Integer dummyInitEditValue) {
      this.dummyInitEditValue = dummyInitEditValue;
    }
  
    public Integer getDummyInitEditValue() {
      // Per lazy loading
      if (dummyInitEditValue == null)
        initData();
      return dummyInitEditValue;
    }
  }
  
  
  

  The problem is that the initData() rises a null pointer exception because the bean connection is not found.

  What's not in my approach?

  I create this hoping to resolve this issue: the login page has 2 URL parameters (defined in his point of view in the config.xml file - adfc) and I have according to them I need to update some of the bean sessionScope uploading connection every time the page is called / refreshes (possibly with new values for the parameters).

  BdW I do not know if there is a better alternative you can advice me.

  Thank you

  Federico

  Well, you need to instantiate bean connection somehow.

  You can try to link an attribute of connection bean to the page and see if this will help or you can try to resolve expression programmatically (something like #{connection}).

  Or you can try adding session bean defined as managed property for your bean view extended (something like this: http://umeshagarwal24.blogspot.ba/2012/09/using-managed-property-to-evaluate.html).

  Dario

• Does container managed entity manager is thread-safe in stateless session bean?

  Hello

  I have read JEE6 doc and confused with

  Manager managed entity containing does (injected by PersistenceContext annotation) is thread-safe in bean of stateless session in env mutiple-thread?

  See code below, if there are 2 requests to stateless session bean in 2 concurrent threads, is it using the same Instance of the managing body or not?

  @Stateless (name = "HRFacade", mappedName = "HR_FACES_EJB_JPA-HRFacade-HRFacade")

  / public class HRFacadeBean implements HRFacade, HRFacadeLocal {}

  @Resource

  SessionContext sessionContext;

  @PersistenceContext (unitName = "HRFacade")

  Private EntityManager em;

  public places (places sites) persistLocations {}
  EM. Persist (rentals);
  return places;
  }

  public places (places sites) mergeLocations {}
  Return em.merge (rentals);
  }

  {} public void removeLocations (places sites)
  location = em.find (Locations.class, locations.getLocationId ());
  EM. Remove (rentals);
  }

  / * < code > o selection of the places where < code > * /.
  @TransactionAttribute (TransactionAttributeType.NOT_SUPPORTED)
  public list < location > getLocationsFindAll() {}
  Return em.createNamedQuery ("Locations.findAll", Locations.class) .getResultList ();
  }

  }

  Yes its safe. Stateless beans would be useless if it wasn't the case. That's the bit of "controlled container" description, as long as you leave the container do its job, you don't have to worry about such details.

• Access EJB session bean in JSF managed bean

  Components of the project: Weblogic 11 G + 12 c, 12 c EJB3 JPA 2 Jdeveloper-ADF

  I need to access EJB session bean in JSF managed bean and some methods of execution by program

  Work method and return EJB below
  Is this fair? Another way

  public static Object getEjbForDataControl (String name) {}
  BindingContainer DCBindingContainer = (DCBindingContainer) BindingContext.getCurrent () .getCurrentBindingsEntry ();
  DCDataControl cDataControl = bindingContainer.findDataControl (name);
  Return cDataControl.getDataProvider ();
  }

  Thank you

  Mohsen

  Hi Isabelle,.

  I assumed that his Session EJB bean has not been exposed as a data control (my bad, didn't read any of the discussion).

  Antonis

• NullPointerException when trying to data Get Session Bean in scope in an another ManagedBean

  Hello

  I used to access some data in my session bean brought a request bean so when I try to get all this data, I get

  com.sun.faces.mgbean.ManagedBeanCreationException: An error occurred performing resource injection
   on managed bean «discussionlaoder» 

  


  at the end of the exception, there are

  Caused by: java.lang.NullPointerException at Hiber.discussionlaoder.init(discussionlaoder.java:35)

  
  

  


  This is my code:

  1 - the scope application bean

  @ManagedBean
  @RequestScoped
  public class discussionlaoder {}

  private MyadmninHelper halper;

  @ManagedProperty(value="#{serviceBean}")
  Private ServicesBean serviceBean;
  @PostConstruct
  public void init() {}
  Halper = getServiceBean () .getHalper ();  line 35

  }

  code Seter and Giraudeau

  }

  2 - the scope sessions bean

  @ManagedBean (impatient = true)
  @SessionScoped
  public class ServicesBean {}

  
  
  private MyadmninHelper halper;

  code Seter and Giraudeau

  }

  uses the glassfish 3.1 Server

  Thanks for the help

  Oky this is work I just put the attribute like this name

  @ManagedBean (impatient = true, name = "serviceBean")
  @SessionScoped
  public class ServicesBean {}

  private MyadmninHelper halper;

  code Seter and Giraudeau

  }

• Stateful session bean store module in EJB?

  Hello
  
  I want to use my EJB Stateful Session Bean (SFSB) module. But it seems that I can't use it because I should not inject my SFSB to a managed bean, or message driven bean (because if I do, the SFSB is communicated to all customers)
  
  I found that the proposed solution is to store SFSB in HttpSession.
  
  I'm doing this way, but I have null pointer exception.
  

  HttpSession session = (HttpSession) facesContext.getExternalContext().getSession(true); 

  So, how can I do this in the EJB module?
  
  Thank you

  Well me: hardly. Generally there is a web layer involved with a perfectly good session (or conversation) in what state can be maintained.

  Alas, you don't want to not seem to really say what is on your mind with or without my eyes so I'll offer just a hunch I have. A stateless bean remains "active" that as long as you keep a connection active IE. the reference that you are looking for or inject into your client code. The 'storage in the session bean' you refer to your first post is the Act of perpetuating the bean; as long as the reference is stored in the session you can continue to use it for the same customer without being cleaned by the container. However: when you are working from a web layer there is not a lot of use for a stateful bean because you can simply use the session itself directly to keep the substance. His personal preference if you use them or not really.

  Where you were going wrong in your initial post, is that you get the the HTTP session object in your EJB code. But you probably already figured out for yourself.

• Cluster server: Replication Session bean

  I use JDeveloper 11.1.1.6.0
  
  I am currently developing our application for a clustered environment, and I was following section 20.4.3 the following document: http://docs.oracle.com/cd/E23943_01/web.1111/b31974/web_getstarted.htm#CHDIJCIE
  
  The document mentions that I need to make the beans of sight, pageflow and session as "serializable" and this bean pageflow view range shall be marked as dirty when they are updated. However, session bean did not have to be marked. I have to do something else in order to ensure that changes to the scope of the session is replicated in the cluster? ADF or somehow detect that there is a change and manage this replication for me?
  
  Thank you.

  The reason why you only need to do this for the beans to view range and pageflow is the way in which they are stored. These scopes are stored as cards in the scope of the session. If you change a bean inside the scope of session card don't know it because she knows that the reference and value.
  Changes to the session scope objects are tracked by the framework.

  Timo