Question about javax.ejb package

Hi,
I am new to J2EE (Recently read a bood about it), and want to start writing some very simple session beans. However, I can't find any jar file that contains the interfaces that I have to implement (e.g. javax.ejb.EJBObject). I read somewhere that it's supposed to be in [JAVA_HOME]/lib/ext/j2ee.jar, but I can't find it.
Also, what is a good starting container enviroment for a beginner? JBoss or Weblogic?
Thanks in advand,
AK

In JBoss (at least the 3.0.4 I have installed right now), you'll find the EJB interfaces in $JBOSS_HOME/server/default/lib/jboss-j2ee.jar . Other parts of the API are in different jar files in the same directory.

Similar Messages

Javax.ejb package

Hi
I am new to java, i just want to understand this, does the javax.ejb package come with J2EE jar file or must i download an SDK of some sort to have it my environment? I am currently using NetBeans 5.5 and getting package does not exist error.
Someone please clarify
thank you

Actually the javax.ejb package is not present ordinary J2SE.
It's present in the J2EE v1.4. You can download this from http://java.sun.com/j2ee/1.4/download.html.
The javax.ejb is present in the j2ee.jar which is present in C:\Sun\AppServer\lib\j2ee.jar (installed in C: drive).
Before compiling, classpath needs to declared either in environmental variables or in the command prompt.
classpath: C:\Sun\AppServer\lib\j2ee.jar;C:\Sun\AppServer\bin;
Then your javax.ejb package will be included.

BMP question : got javax.ejb.EJBException error Object state not saved

Could anybody please help me? I could not figure out what i did wrong.
I got the javax.ejb.EJBException error: Object state not saved
when i test the getname() method for findByPrimaryKey() and findAll() methods.
Here is my code:
package org.school.idxc;
import javax.sql.*;
import javax.naming.*;
import javax.ejb.*;
import javax.sql.*;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Enumeration;
import java.util.Vector;
* Bean implementation class for Enterprise Bean: status
public class statusBean implements javax.ejb.EntityBean {
     private javax.ejb.EntityContext myEntityCtx;
     private int id;
     private String name;
     private DataSource ds;
     private String dbname = "jdbc/idxc";
     private Connection con;
     * ejbActivate
public void ejbActivate() {
     * ejbLoad
     public void ejbLoad() {
     System.out.println("Entering EJBLoad");
     try
     Integer primaryKey = (Integer) myEntityCtx.getPrimaryKey();
     String sqlstmt = "select id, name from from status where id =?";
     con = ds.getConnection();
     PreparedStatement stmt = con.prepareStatement(sqlstmt);
     stmt.setInt (1,primaryKey.intValue());
     ResultSet rs = stmt.executeQuery();
     if (rs.next())
          this.id = rs.getInt(1);
          this.name = rs.getString (2).trim();
          stmt.close();
     } // if
     else
          stmt.close();
          throw new NoSuchEntityException ("Invalid id " + id);
     }// else
          } // try
     catch (SQLException e)
     System.out.println("EJBLOad : " + e.getMessage());
          } // catch
     finally
     try
          if (con != null)
          con.close();
          }// try
     catch (SQLException e)
          System.out.println("EJBLOad finally" + e.getMessage());
          } // catch
          }// finally
     * ejbPassivate
     public void ejbPassivate() {
     * ejbRemove
     public void ejbRemove() throws javax.ejb.RemoveException {
     System.out.println ("Entering ejb Removed");
     try
     String sqlstmt = "delete from status where id=" + id;
     con = ds.getConnection();
     Statement stmt = con.createStatement();
     stmt.executeUpdate(sqlstmt);
     stmt.close();
     }// try
     catch (SQLException e)
     System.out.println("Ejb Remove" + e.getMessage());
     } // catch
     finally
     try
          if (con!=null)
               con.close();
     }// try
     catch (SQLException e)
          System.out.println ("EJBRemoved " + e.getMessage());
     } // catch
     } // finally
     * ejbStore
     public void ejbStore() {
     System.out.println("Entering the ejbStore");
     try
String sqlstmt = "update status set id=" + id + ",name='" + name + "' where id=" + id;
     con = ds.getConnection();
     Statement stmt = con.createStatement();
     if (stmt.executeUpdate(sqlstmt) != 1)
          throw new EJBException ("Object state not saved");
stmt.close();
     } // try
     catch (SQLException e)
          System.out.println ("EJBStore : " + e.getMessage());
     }// catch
     finally
     try
          if (con != null)
          con.close();
     } // try
     catch(SQLException e)
          System.out.println ("EJBStore finally " + e.getMessage());
     } // catch
     } // finally
     * getEntityContext
     public javax.ejb.EntityContext getEntityContext() {
          return myEntityCtx;
     * setEntityContext
     public void setEntityContext(javax.ejb.EntityContext ctx) {
          myEntityCtx = ctx;
          try
          InitialContext initial = new InitialContext();
          ds = (DataSource)initial.lookup(dbname);
} // try
          catch (NamingException e)
          throw new EJBException ("set Entity context : Invalid database");
          }// catch
     * unsetEntityContext
     public void unsetEntityContext() {
          myEntityCtx = null;
     * ejbCreate
     public Integer ejbCreate(Integer key, String name) throws javax.ejb.CreateException {
this.id = key.intValue();
this.name = name;
          System.out.println ("Entering ejbCreated!!!");
          try
          String sqlstmt = "insert into status(id,name) values (" + id + ",'" + (name == null ? "" : name) + "')";
          con = ds.getConnection();
          Statement stmt = con.createStatement();
          stmt.executeUpdate(sqlstmt);
          stmt.close();
          }// try
          catch (SQLException e)
          System.out.println("EJBCreate : SQLEXception ");
          }// catch
          finally
          try
          if (con!=null)
               con.close();
          }// try
          catch (SQLException e)
          System.out.println ("EJB Created Finally : SQLException");
          e.getMessage();
          } // catch
          }// finally
          this.id = key.intValue();
          this.name = name;
          return key ;
     * ejbPostCreate
     public void ejbPostCreate(Integer id, String name) throws javax.ejb.CreateException {
     * ejbFindByPrimaryKey
     public Integer ejbFindByPrimaryKey(
          Integer key) throws javax.ejb.FinderException {
          try
          String sqlstmt = "select id from status where id=" + key.intValue();
          con = ds.getConnection();
          Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(sqlstmt);
          if (!rs.next())
          throw new ObjectNotFoundException();
          } // if
          rs.close();
          stmt.close();
          } // try
          catch (SQLException e)
          System.out.println ("EJBFindBYPrimaryKey " + e.getMessage());
          } // catch
          finally
          try
          if (con!=null)
               con.close();
          }// try
          catch (SQLException e)
          System.out.println ("EJB Find by primary key" + e.getMessage());
          }// catch
          }// finally
          return key;
     * @return Returns the name.
     public String getName() {
          return this.name;
     * @return Returns id
     public int getId() {
          return this.id;
     * @param name The name to set.
     public void setName(String xname) {
          this.name = xname;
     * ejbFindByLastnameContaining
     public Enumeration ejbFindAllNamne () throws javax.ejb.FinderException
     try
     String sqlstmt = "select id from status order by id";
     con = ds.getConnection();
     Statement s = con.createStatement();
     ResultSet rs = s.executeQuery(sqlstmt);
     Vector keys = new Vector();
     while (rs.next())
          keys.add(new Integer(rs.getInt(1)));
     }// while
     rs.close();
     s.close();
     con.close();
     return keys.elements();
     } // try
     catch (SQLException e)
          throw new FinderException (e.toString());
     } // catch
}

Hi,
if you look at your error message you will see the problem. In your code you've missed to implement
public void ejbPassivate {}
so your code looks like this
import java.lang.Object;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import java.rmi.RemoteException;
import java.lang.Math;
import java.util.Random;
import java.io.*;
/** * Title: * Description: * Copyright: Copyright (c) 2001 * Company: * @author * @version 1.0 */
public class DiceEJB implements SessionBean, Serializable
     public int[] Roll()
          Random rng = new Random();
          int[] diceArray = new int[5];
          for(int i =0; i < diceArray.length;i++)
               diceArray[i] = (Math.abs (rng.nextInt()) % 6) +1;
          return diceArray;
     public DiceEJB(){}
     public void ejbCreate() {}
     public void ejbRemove() {}
     public void ejbActivate() {}
     public void ejbPassivate() {}
     public void setSessionContext (SessionContext sc)
     private void writeObject(ObjectOutputStream oos) throws IOException
          oos.defaultWriteObject();
     private void readObject(ObjectInputStream ois) throws ClassNotFoundException, IOException
          ois.defaultReadObject();
bye

Questions about the 'filesystem' package

After reading some recent threads and bug reports about the 'filesystem' package, I have the following questions:
1. What is the reason for adding systemd-related users and groups to this package? Why not add them using the install script in the systemd package?
2. Why ship /etc/{shadow,gshadow} files at all? Why not create and manage them by `pwconv`, `grpconv` and such (perhaps by an install script in the shadow package)?
Last edited by ackalker (2014-06-27 17:12:52)

I didn't mean the dev ML, arch-general will do just fine. arch-dev-public is read-only fro non-devs and non-TUs.

Question about Flash iPhone packager

So since Apple now allows it, Adobe picked up development for it again I heard. My question is, additionally to the possibility of creating iPhone apps from scratch I heard there is a packager that allows you to wrap up Actionscript 3 projects as an iPhone app. I didn't get too many infos about it on google since its mostly the same kind of news turning up.
Can you use a previously made Actionscript 3 game or do you have to start a new one and make it with the iPhone in mind? If you can use a previously made project how do you customize it for the touch controls? Does the packager change it into a file useable in Flash again to add these features? I'm totally clueless about the possibilities and it would be great if someone could tell me.
Is it really that I can make an already made as3 game iPhone compatible as long as I have an Apple developer subscription? Or is it limited to simple apps?
Would love for someone to elaborate this. Thanks

http://help.adobe.com/en_US/as3/mobile/flashplatform_optimizing_content.pdf
http://download.macromedia.com/pub/labs/packagerforiphone/packagerforiphone_devguide.pdf
http://forums.adobe.com/community/labs/packagerforiphone?view=discussions&start=0
http://floatlearning.com/2010/10/key-differences-in-air-for-android-and-ios/

A question about CLASSPATH and Package

The configuration of my computer is:
Windows98, C:\j2sdk1.4.0
Which in Autoexec.bat are included like this:
path=C:\j2sdk1.4.0\bin
set CLASSPATH=C:\j2sdk1.4.0\lib
Then I make a new directory named t in C:\j2sdk1.4.0\lib, where there is a compiled file a.class, source code is:
package t;
public class a
And another java file was in D:\t, named b.java, code like this:
import t.*;
class b extends a
public static void main( String[] args )
System.out.println("OK");
Then I compiled like this: javac b.java, it was wrong; but when I compiled like this: javac -CLASSPATH C:\j2sdk1.4.0\lib b.java, It was OK!!! Why?? And then when I execute like this: java b, an error message was prompted(Can not find class t/a)!!! How can I do?

First one general comment: I would not advise putting your own classes into C:\j2sdk1.4.0\lib since this suggests that the classes under this directory belong to the Java distribution. So my advice: create your own directory somewhere like D:\user\Classes or whatever.
The directory (-ies) you specify in CLASSPATH are root entries telling the JVM where to start looking for classes. Why root entries? Well, the package structure is reflected in the directory structure relative to these roots. So a class of package t belongs into the subdirectory t of one of the directories specified in your CLASSPATH. This would be the case of your class a - by the way, the convention says that class names are capitalized. Since class b, on the other hand, is not in any package, it belongs irirectly into one of the directories of your CLASSPATH.
Whereas the compiler is fairly forgiving about the location of your source files, the JVM is not. Invoking a class of some package requires you to provide the fully-qualified name to the java command. So if you wanted to run class a, you would have to invoke "java t.a". Starting class b, simply requires a call of "java b". But make sure the class file of class a is located in the subdirectory t of one of the directories specified in your CLASSPATH.

[SOLVED] Question about Saving Cached Packages

Hey Guys,
I've got a couple of systems running Arch right now, and have a 3rd that I was thinking about setting up this weekend. The second of the 2 I already have is very recent and I haven't cleared out the package cache yet. If I were planning on installing the same applications on the next system, could I just save the package files in /var/cache/pacman to a CD or something and just copy them back to the new system once I have the CORE installed? I figure this would save an hour or so of downloading, which would be nice. If it is possible, is there anything else I need to have aside from the packages themselves (ie. is there like a header file somewhere)?
Thanks!
Swill
Last edited by Mr. Swillis (2008-11-21 06:01:15)

Well - it could work - or it might not. Better solution is to make another repository using your recent packages.
Try to write this to your /etc/pacman.conf:
[name_of_your_own_repo]
Include = /path_to_your_own_repo
I haven't tried it personally, but it should work. If it will prefer packages from other repos (community, extra), then write it somewhere above other repos in /etc/pacman.conf or use pacman -S name_of_your_own_repo/package
You should read about Pacman at Arch-wiki to know more about making your own repository before you will decide to try it.
Either way, write your experience here, please, I'd want to know if it works or not
Last edited by cybermage (2008-11-20 20:19:41)

Question about [org.openide] Package

Hi all,
I want to add to my GUI a popup ColorPicker
I found an example that imports org.openide.windows.WindowManager
, but NetBeans 5 that I am using shown to
me that org.openide.windows package
does not exist.
What I should to solve this problem?
if you have another examples about
popup color picker could you show
me that?
Thanks.

The example that I have mentioned located in the follwoing address:
http://www.netbeans.org/kb/articles/desktopsampler/DesktopSamplerToolbar.html
And
I prefer the popup color picker rather than using JColorChooser, You can see here JColorChooser gives you a lots of tools. I just need from
user to select a specific color from the color picker and the JTextField
value will be changed according to the selection.
So, I need first to fix the import org.openide.windows package first.

Question about the HandHeld Package Configuration

PDA Model - Dell Axim 30 Pocket Pc o/s Windows CE 2003 SE
ZFH Version - 6.5
I have configured the handheld package, program section as follows:
Programs to include on the start menu:
Pocket Explorer
Groupwise
Groupwise Appt
Groupwise Day
Groupwise Note
Groupwise Taks
Groupwise Week
Pocket Word
Pocket Excel
Pocket Adobe
THe Move all other Start Menu / Desktop items to the Programs Folder is checked
The Hide all items in the Programs Folder is checked.
The way that I interept this is that the programs I noted above will show up on the Start menu and no icons should appear on the programs screen.
What I get is: The items do show up in the Start Menu as configured, however when I tap on the programs section of the start menu, the 'desktop' icons for Word, Excel and Adobe show up.
Am I doing something wrong?
Thanks,
Cheryl
Cheryl Fischer
Network / Email Administrator
Horizon Bank

1. First and foremost, my suggestion would be to view the status (and the
details therein) of the Policy Enforcement on the device.
{{To do this, follow device_object > Properties > ZENWorks : Policy Status
tab > Display button > Select the correct row > View button }}
2. If things seem fine there, browse the following location on your device.
My Device >> Windows >> Start Menu >> Programs
Do you see any shortcuts there ? On most devices, this is the location
where the short-cuts of "Programs" folder are located.
Do let us know if this folder is empty or not.
Thanks & Regards
Anand Sinha
"Cheryl Fischer" <[email protected]> wrote in message
news:s_cFd.93$[email protected]..
> PDA Model - Dell Axim 30 Pocket Pc o/s Windows CE 2003 SE
>
> ZFH Version - 6.5
>
> I have configured the handheld package, program section as follows:
>
> Programs to include on the start menu:
>
> Pocket Explorer
> Groupwise
> Groupwise Appt
> Groupwise Day
> Groupwise Note
> Groupwise Taks
> Groupwise Week
> Pocket Word
> Pocket Excel
> Pocket Adobe
>
> THe Move all other Start Menu / Desktop items to the Programs Folder is
checked
> The Hide all items in the Programs Folder is checked.
>
> The way that I interept this is that the programs I noted above will show
up on the Start menu and no icons should appear on the programs screen.
>
> What I get is: The items do show up in the Start Menu as configured,
however when I tap on the programs section of the start menu, the 'desktop'
icons for Word, Excel and Adobe show up.
>
> Am I doing something wrong?
>
> Thanks,
> Cheryl
>
>
>
> Cheryl Fischer
> Network / Email Administrator
> Horizon Bank
>
>
>

Question about javax.naming.Context (JDK 1.5.0)

Hi again
I am migrating from JDK 1.4.2 to 1.5.0 and I have one issue with the interface javax.naming.Context:
Th original code has something like:
(import section)
public class ContextImplementation implements Context {
    public ContextImplementation() {
    [some stuff]
    public NamingEnumeration<NameClassPair> list(String s) throws NamingException
        return list(((Name) (new CompositeName(s))));
    public NamingEnumeration<NameClassPair> list(Name name) throws NamingException {
        return listBindings(name); // <<----- (A)
    public NamingEnumeration<Binding> listBindings(String s) throws NamingException {
        return listBindings(((Name) (new CompositeName(s))));
    public NamingEnumeration<Binding> listBindings(Name name) throws NamingException {
        throw new NamingException("Operation Not Supported");
}(A)
I got the message: Type mismatch: cannot convert from NamingEnumeration<Binding> to NamingEnumeration<NameClassPair>
Researching over the net I found that Binding extends from NameClassPair, but I don't have much experience deailing with this new Generics
Could anyone guide me to the right direction?
Any help would be appreciate.

    public NamingEnumeration<NameClassPair> list(Name name) throws NamingException {
        //return listBindings(name);
         return listBindingsForNameClassPair(name);
    // I wrote another one
    public NamingEnumeration<NameClassPair> listBindingsForNameClassPair(Name name) throws NamingException {
        throw new NamingException("Operation Not Supported");
    }What do you think?

Question about using ejb remote home vs ejb reference

hi guys
i am new to EJB and want to understand the difference between these two. i notice that the ejb reference is declared in the ejb-jar.xml so that the calling ejb can get the home object by using
initCtx.lookup("java:comp/env/ejb/CabinHome");which is declared in
<ejb-ref>
<description>Cruise ship cabin</description>
<ejb-ref-name>ejb/CabinHome</ejb-ref-name>
<ejb-ref-type>Entity</ejb-ref-type>
<home>com.titan.cabin.CabinHome</home>
<remote>com.titan.cabin.Cabin</remote>
<ejb-link>CabinBean</ejb-link>
</ejb-ref>how does this differ from using the JNDI to get the home interface. which one is preferred?
thanks for your help.

Right, portable Java EE applications always access resources via their component environment rather than doing a direct global JNDI lookup. Declaring the ejb dependency provides a level of indirection that allows it to be mapped to the appropriate target ejb in each application server without requiring any code changes. The same principle is used for other kinds of component dependencies such as data sources, queues, etc.
The downside to this in J2EE 1.4 and earlier was the overhead/complexity of declaring the ejb-ref/ejb-local-ref in the deployment descriptor. Java EE 5 improves this by introducing environment annotations such as @EJB that make it easy to declare the dependencies. In Java EE 5, @EJB is equivalent to ejb-ref/ejb-local-ref but doesn't require the use of .xml.
The bottom line is if you're writing code that's running within a Java EE component, always access Java EE resources/dependencies through your component environment or use an environment annotation.
--ken

Some question about javax.mail.Folder

the method Folder.getUnreadMessageCount().
I want to know the result whether include the message which flag is delete but the client do not read it?
the same question with getMessageCount and getNewMessageCount
thaks ahead:)

Yes. This methods run "SEARCH" command with arguments.
Example: SEARCH SEEN Messages that have the \Seen flag set.
see http://www.ietf.org/rfc/rfc2060.txt

Another question about running ejbs

Hi people,
I'm getting this error when I try to run a EJB:
Error instantiating application at file:/C:/TEMP/jdev/system/oc4j-config/applications/bc4j.ear: Unable to find/read assembly info for C:\TEMP\jdev\system\oc4j-config\applications/bc4j (IO error: unable to find bc4j)
Somebody knows the reason or what should I do to fix it?
thanks,
Edilson

Welcome to Apple Discussions!
1. Buy an older PowerPC Mac used or refurbished as my FAQ* explains how to do:
http://www.macmaps.com/usedrefurbished.html
2. Contact the developer of the said software and ask a Mac OS X version be published of their software.
3. Politely ask Apple develop a virtualization program through AppleCare's Customer Relations department, http://www.apple.com/macosx/feedback/ and if you want a free developer account go to http://bugreporter.apple.com/ and submit it as an enhancement request.
4. Tell us what software you want to run that you found is 9 only, and maybe we can tell you an alternative that can open the same documents, play the same style game that is Mac OS X native, or will run under Windows or Linux on your Mac?
- * Links to my pages may give me compensation.
Message was edited by: a brody

Question about the generated package of an RMI stub class.

Does anyone know why rmic tool generated stubs are in the same package as the class that implements the remote interface? For example, say I have an interface, MyRemoteInterface, in the foo.bar package, and an implementing class, MyRemoteImpl, in the baz package. When baz.MyRemoteImpl is compiled by rmic, a stub, MyRemoteImpl_Stub, is generated in the baz package.
Now I would have thought that MyRemoteImpl_Stub would have been generated in the foo.bar package, as the stub is to be used on the client to handle calls at the interface level. In other words, the baz package really only makes sense on the server. This is in fact how stubs are generated for CORBA using the -iiop flag to rmic.
Is there at least a way to specify the generated package?

if u are running rmic on a class called com.yourmi.MyClass the stub will be generated with
exactly the same package.
the only thing that u can change is the location of the stub (for example, in another directory)
but also in that other directory you will find com\yourmi\MyClass_Stub
regards
marco

[SOLVED] Questions about delta mirror/package

My bandwidth is slow and expensive so i use delta package as per this Arch Wiki.
But, for anumber of reasons the delta mirror only provide small number of delta package, and it's geographically far away from where i live so it's kind of slower.
Here's my /etc/pacman.d/mirrorlist:
Server = http://suro.ubaya.ac.id/archlinux/$repo/os/$arch
Server = http://delta.archlinux.fr/$repo/os/$arch
First line is nearest Arch mirror dan second line is delta package mirror.
What i want to achieve with that mirrorlist is Arch download update with delta package if available, if there is no delta package avalaible for that update then Arch will download regular package from the nearest mirror.
Thanx
EDIT: Solved it, well, kind of ...
I end up created a script for update.
#!/bin/sh
sed -i '/suro/s/^Server/#Server/' /etc/pacman.d/mirrorlist
pacman -Syy
sed -i '/suro/s/^#Server/Server/' /etc/pacman.d/mirrorlist
pacman -Su
Last edited by si_kabayan (2014-11-13 05:47:29)

karol wrote:I mean the order in the mirrorlist.
OK.
Lone_Wolf wrote:
The order in mirrorlist is what matters.
pacman will ask the first uncommented mirror , if that has the info required pacman uses that mirror.
If the first uncommented mirror doesn't have the info or doesn't respond, pacman will try the next uncommented mirror
Do you know if delta.archlinux.fr hosting only delta package or mirrorring all Arch package?
Because i just need delta package from this mirror, and regular package must from nearest mirror.

Question about javax.ejb package

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