Get the return parameters of the called method of VO to bean

Similar Questions

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  Hello

  Can I get the SIM card or in any other way caller ID. ?

  anyone has an idea about this. Please give suggestion/Reference / code for this example.

  Thank you.

  Narendra

  the two abbreviations are words smart cards related:
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  Java Card Remote Method Invocation is the communication unit between a smartcard reader and a smart card.

  they can be used only to communicate with applications on a sim card.
  Source:
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• Threads Java - how to prevent the calling methods between objects

  I have two objects i.e. ObjectClass1 and ObjectClass2 and two threads Thread1 and Thread2. I need Thread1 to run the methods A and B of 1 of the ObjectClass and keep him execution methods C and D on ObjectClass2 and at the same time (at the same instance), I need Thread2 to run C and D of ObjectClass2 methods and keep him execution of methods A and B on 1 ObjectClass without producing a blockage.
  
  How can it be possible? I tried to use flags, but does not work for some reason any. I could also use synchronize (obj2) 1 wire and synchronize (obj1) in Thread2 - but that leads to a dead end
  

  public class InterlockingExample{
       public static void main(String[] args){
            
            final ObjectClass1 obj1 = new ObjectClass1();
            final ObjectClass2 obj2 = new ObjectClass2();
            //final boolean obj1Callable = false;
            //final boolean obj2Callable = false;
            Thread t1 = new Thread(new Runnable(){
                 public void run(){
                      //System.out.println("This is Thread1 ");
                      synchronized(obj1){
                                obj1.obj1Callable = true;
                                obj2.obj2Callable = false;
                                     try{
                                          Thread.sleep(1000);
                                          System.out.println(Thread.currentThread().getName());
                                          // We could call methods on obj1 here
                                          obj1.methodA();
                                          obj1.methodB();
                                          System.out.println("Trying to call Object2 methods");
                                          if(obj2.obj2Callable == true){
                                               obj2.methodC();
                                               obj2.methodD();
                                          }
                                     }
                                     catch(InterruptedException ex){
                                          System.out.println("Error occurred: " + ex.getMessage());
                                     }
                                          
                                
                                                    
                      }
                 }
                 
            });
            
            Thread t2 = new Thread(new Runnable(){
                 public void run(){
                      //System.out.println("This is Thread2 ");
                      synchronized(obj2){
                           obj2.obj2Callable = true;
                           obj1.obj1Callable = false;
                           try{
                                Thread.sleep(1000);
                                // We could call methods on obj2 here
                                System.out.println(Thread.currentThread().getName());
                                obj2.methodC();
                                obj2.methodD();
                                System.out.println("Trying to call Object1 methods");
                                if(obj1.obj1Callable == true){
                                     //System.out.println("Thread2: Cannot call obj1 methods...");
                                     //System.out.println("Thread2: obj1 methods are locked! ");
                                     obj1.methodA();
                                     obj1.methodB();
                                }
                                
                                //System.out.println(Thread.currentThread().getName());
                                
                           }
                           catch(InterruptedException ex){
                                System.out.println("Error occurred: " + ex.getMessage());
                           }
                                                    
                      }
                 }
                 
            });
            
            t1.start();
            t2.start();
       }
       
       private static class ObjectClass1{
            public boolean obj1Callable;
            public void methodA(){
                 System.out.println("ObjectClass1: methodA() ");
            }
            public void methodB(){
                 System.out.println("ObjectClass1: methodB() ");
            }
       }
       private static class ObjectClass2{
            public boolean obj2Callable;
            public void methodC(){
                 System.out.println("ObjectClass2: methodC() ");
            }
            public void methodD(){
                 System.out.println("ObjectClass2: methodD() ");
            }
       }
       
  }

  Edited by: njguy March 1, 2011 20:01
  
  Edited by: njguy March 1, 2011 20:26
  
  Edited by: njguy March 1, 2011 20:37

  has njguy writes:
  jverd: according to your suggestion, I coded that follows, but do you not think that this would lead to a dead end for sure.

  If you are coding according to my suggestions, deadlock will be impossible.

  Please see the order in which I get the locks
  Thread1: {obj1, obj2} and Thread2: {obj2 obj1} which is the case perfect deadlock.

  This is exactly the opposite of my suggestion, and I even stated explicitly that if you do this, you define yourself in deadlock.

  What I said:

  1. you avoid deadlock so that any thread that needs to acquire lock1 both QL2 always does in a consistent order, like first on lock1, then inside this block synchronization, sync on QL2. If a son not {lock1 {QL2}} and the other not {QL2 {lock1}}, that's how you get blocked.

  Sorry if I wasn't clear enough. All threads need to acquire locks in the same order:

  //  ----- What I suggested ---
  // T1
  sync (lock1) {
    sync (lock2) {
      // stuff
    }
  }
  
  // T2
  sync (lock1) {
    sync (lock2) {
      // stuff
    }
  }
  
  // ---- What I said not to do, but you did ---
  // T1
  sync (lock1) {
    sync (lock2) {
      // stuff
    }
  }
  
  // T2
  sync (lock2) {
    sync (lock1) {
      // stuff
    }
  }
  

  Edited by: jverd March 2, 2011 09:23

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• The same method works OK a bean, cause of error in another

  For the experienced:
  
  I use JDeveloper 10.1.3.4 and the backup of a page bean, to get an instance of a module application I do this way:
  

      public ZBOVStaffModuleImpl getZBOVStaffAm() {
          FacesContext fc = FacesContext.getCurrentInstance();
          ValueBinding vb = fc.getApplication().createValueBinding("#{data}");
          BindingContext bc = (BindingContext)vb.getValue(fc);
          DCDataControl dc = bc.findDataControl("ZBOVStaffModuleDataControl");
          ApplicationModule am = (ApplicationModule)dc.getDataProvider();
          return (ZBOVStaffModuleImpl)am;
      }
  
      public String commandButton1_action() {
          ZBOVStaffModuleImpl zbovStaffModule = getZBOVStaffAm();
          // ... lines omitted
          return null;
      }

  Before you add only one line in the commandButton action method, it can be called and clicked commandButton1 without causing any problems. Now, simply by adding a line that calls the getZBOVStaffAm() method when you click commandButton1, I got the error in the browser:
  

  javax.faces.FacesException: #{staffLogin.commandButton1_action}: javax.faces.el.EvaluationException: java.lang.NullPointerException

  I removed the line in the commandButton1_action() method and copied the lines of the getZBOVStaffAm() to the commandButton1_action() method method, one line at a time and run the pages and found that when this last line shown here is added, the error has been spilled in the browser:
  

      public String commandButton1_action() {
          FacesContext fc = FacesContext.getCurrentInstance();
          ValueBinding vb = fc.getApplication().createValueBinding("#{data}");
          BindingContext bc = (BindingContext)vb.getValue(fc);
          DCDataControl dc = bc.findDataControl("ZBOVStaffModuleDataControl");
          ApplicationModule am = (ApplicationModule)dc.getDataProvider(); // line causing problem
          // ...
          return null;
      }

  I have no idea why this line would spill error. The getZBOVStaffAm() method is copied word for Word from another bean of support, and in this bean support, this method is called in the same way but has not caused any problems. I checked doulbe ZBOVStaffModuleDataControl data control name is correct. Hope that experienced developers would have some suggestions.
  
  My application is in two parts. For the part of the student, the application module is ZBOVModule. During the construction of the part of the staff, I added the ZBOVStaffModule and built pages and tested features, without joining them with cases of navigation. The bean to support one of these pages, I created this getZBOVStaffAm() methods to avoid repeating the same code. And it has worked very well.
  
  Now all these pages are built and worked, I restarted right at the end of the part of the student, created a diagram vacuum staff-faces - config.xml for testing each reconstructed page, adding the login page and join them in case of navigation. But leader, in the first two pages involving login and required the use of the getZBOVStaffAm(), I went to the problem described above.
  
  Thanks a lot for your help!
  
  Newman

  Hello Newman,

  I see nothing wrong in your code.
  Do you have links in your pagedefinition? If this isn't the case, you can try adding just a few link by drag / drop some attribute on the page and see.

  Sometimes back I faced the same question when I don't have the links in my pagedefinition and adding a component and linking to some datacontrol method/attribute this problem resolved. Not sure if this is a bug, but you can give it a try.

  Jean Lou

• How to get the value of varStatus in managed Bean

  Hi all

  I use jDeveloper 11.1.2.4 version.

  I had a table with table with departments view object. I added an extra column to the table to display the serial numbers of the lines like this.

  < af:table...

  varStatus = 'vs' rowSelection = "multiple" id = "t1" binding = "#{ReferenceBeans.departmentTable}"> "

  < af:column id = "c5" headerText = "varStatus" >

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  at the bean, I get all the values of the selected line, but I don't get the varStatus value of the column.

  If I use

  Object varStatus is getVarStatus () .getValue ();.

  System.out.println("varstatus::"+varStatus);

  That's the impression first value only, but not the values of the selected line.

  

  How to get the varStatus value in the bean selected lines.

  Best regards

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  Hi all
  I'm NameNotFoundException while trying to watch the stopwatch of the startup class.
  
  Commonj.timers.TimerManager, I have it configured in the ejb - jar file. My MDB XML. I use the statrtup class to initialize some static immidiate of components to the active state of the MDB. I have to initialize the timer Manager object immidiate active state of the MDB that is configured in the file ejb - jar.Xml. I wrote this search logic in the postStart() of the ApplicationLifecycleListener method, the called method but the search fail logic, the same logical aspect works in class MDB (MDBTimer.java). I tried different ways, I don't find a solution, finally, I write the problem here.
  
  
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  WebLogic - application.Xml
  
  
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  <>earpiece
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  < / weblogic application >
  
  
  EJB - jar. XML
  
  < ejb - jar 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."
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  my.examples.mdb.timer.MDBTimer < the ejb class >-
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  < resource-ref >
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  Container < res-auth > < / res-auth >
  < res-sharing-scope > shared < / res-sharing-scope >
  < / resource-ref >
  < / message-driven >
  < / enterprise beans >
  < / ejb - jar >
  
  
  MDBTimer.java
  
  
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  Import javax.ejb.MessageDriven;
  Import javax.ejb.TransactionAttribute;
  Import javax.ejb.TransactionAttributeType;
  Import javax.jms.Message;
  to import javax.jms.MessageListener;
  Import javax.jms.ObjectMessage;
  
  Import commonj.timers.Timer;
  Import commonj.timers.TimerManager;
  
  @MessageDriven (mappedName = "TEST_Q" name = "MyTimerMDB", activationConfig = {}
  @javax.ejb.ActivationConfigProperty (propertyName = "acknowledgeMode", propertyValue = "Auto-reconnaître").
  @javax.ejb.ActivationConfigProperty (propertyName = "destinationType", propertyValue = "javax.jms.Queue").
  ({@javax.ejb.ActivationConfigProperty (propertyName = "transactionType", propertyValue = "Container")})
  @TransactionAttribute (TransactionAttributeType.REQUIRED)
  / public class MDBTimer implements MessageListener {}
  
  public static TimerManager Manager = null;
  
  @Override
  {} public void onMessage (Message arg0)
  System.out.println ("onMessage () method called...\n\n");
  
  If (arg0 instanceof ObjectMessage) {}
  
  ObjectMessage msg = (ObjectMessage) arg0;
  try {}
  
  If (msg.getObject instanceof String ()) {}
  Thread.Sleep (1000);
  System.out
  .println ("received message > >" + msg.getObject ());
  }
  } catch (Exception e) {}
  e.printStackTrace ();
  }
  }
  System.out.println ("onMessage () method returned...\n\n");
  {if(Manager==null)}
  Manager = MyUtil.getTimerManager ();
  }
  }
  
  }
  
  
  TestApplicationListener.java
  
  package my.examples.mdb.timer;
  
  Import commonj.timers.TimerManager;
  
  Import weblogic.application.ApplicationException;
  Import weblogic.application.ApplicationLifecycleEvent;
  Import weblogic.application.ApplicationLifecycleListener;
  
  SerializableAttribute public class TestApplicationListener extends ApplicationLifecycleListener {}
  Public Sub preStart (ApplicationLifecycleEvent evt) throws ApplicationException {}
  String logStr = "> > > > () TestApplicationListener.preStart > > > >";
  System.out.println (logStr + "entered...");
  super.preStart (evt);
  System.out.println (logStr + "leveaing...");
  }
  
  Public Sub postStart (ApplicationLifecycleEvent evt) throws ApplicationException {}
  String logStr = "> > > > () TestApplicationListener.postStart > > > >";
  System.out.println (logStr + "entered...");
  super.postStart (evt);
  TimerManager timerManager = MyUtil.getTimerManager ();
  System.out.println (logStr + "timer Got Manager == >" + timerManager);
  System.out.println (logStr + "leveaing...");
  }
  Public Sub preStop (ApplicationLifecycleEvent evt) throws ApplicationException {}
  String logStr = "> > > > () TestApplicationListener.preStop > > > >";
  System.out.println (logStr + "entered...");
  TimerManager timerManager = MyUtil.getTimerManager ();
  System.out.println (logStr + "timer Got Manager == >" + timerManager);
  super.preStop (evt);
  System.out.println (logStr + "leveaing...");
  }
  
  Public Sub postStop (ApplicationLifecycleEvent evt) throws ApplicationException {}
  String logStr = "> > > > () TestApplicationListener.postStop > > > >";
  System.out.println (logStr + "entered...");
  super.preStop (evt);
  System.out.println (logStr + "leveaing...");
  }
  
  }
  
  
  MyUtil.java
  
  package my.examples.mdb.timer;
  
  Import javax.naming.InitialContext;
  Import javax.naming.NamingException;
  
  Import commonj.timers.TimerManager;
  
  public class MyUtil {}
  
  public static TimerManager getTimerManager() {}
  TimerManager timerManager = null;
  try {}
  InitialContext ctx = new world;
  timerManager = ctx (TimerManager)
  . Lookup("Java:COMP/env/Timer/MyDefaultTimer");
  System.out
  .println ("@@@Looked - up using java: comp/env/timer/MyDefaultTimer:")
  (+ timerManager);
  } catch (NamingException e) {}
  e.printStackTrace ();
  }
  Return timerManager;
  }
  
  
  
  }

  Podie salvation,

  I tested your program as long as your have posted in the forums. And I got the same error NameNotFoundException. After debugging some more on what I find pre-departure that until the ApplicationLifecycleListener) (as well as the postStart() method runs correctly the EJB Module isn't really gets activated laugh.. why the resource-ref <>which we specified in the file "ejb - jar.xml" doesn't get nvoked so until that time, there is no such Timer available on the server while we get NameNotFoundException.)

  If somehow we can do search for "timer/MyDefaultTimer' after the preStart() and postStart() method is executed successfully, then we have no problem.

  .
  .
  Thank you
  Jay SenSharma

• Get the parent in the child VO inst value

  I have a master detail on the page and in a column of vo child I want to display the current line of a master vo.
  
  Then, how to refer to the master vo-current rank in the child attribute in line on UI? in the same fields vo can be accessed as #{rank. AttrbiuteName.inputValue}

  Maybe this can help: http://www.gebs.ro/blog/oracle/adf-bc-viewlink-viewlinkaccessor-and-groovy/
  or you can bind the value property in the retail method column in managed bean that can extract value iterator parent, something like this:

  public String getSomeFieldFromParent(){
      return (String)ADFUtils.findIterator("parentIterator").getCurrentRow().getAttribute("SomeAttribute");
  }
  

  Dario