5 Replies Latest reply on Nov 6, 2003 7:32 AM by darranl

    Basic doubt on Initial Context Factory

    mukesh_babu
    mukesh_babu Nov 5, 2003 6:03 AM

      Hi,
      I am new to J2EE and Jboss. I have a small doubt in initial context. I have a bean deployed and from client i want to access it so i should do a JNDI look up.
      For this i am using the following code :
      Properties p = new Properties();
      p.setProperty("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
      p.setProperty("java.naming.provider.url","jnp://" +m_serverHost + ":" + m_serverPort);
      tx= new InitialContext(p);
      home = ctx.lookup(beanName);

      The above code is working fine but i am able to look up the bean in following way also :
      Context ctx = new InitialContext();
      home = ctx.lookup(beanName);
      So my doubt is what is the advantage of setting the org.jnp.interfaces.NamingContextFactory and provider.url ?

      I will be thankful if some one can help in understanding the above doubt.
      I appreciate your help in this regard.
      Thankyou in advance.

      Regards,
      Vamsee.

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        • 1. Re: Basic doubt on Initial Context Factory
          darranl
          darranl Nov 5, 2003 6:20 AM (in response to mukesh_babu)

          Do you have any jndi.properties files in the classpath of the client, if you do the properties will be retrieved from there if you do not provide them yourself.

          I think some of the JBoss jar files contain a jndi.properties so depending on which jar files you have included is could be one of those.

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          • 2. Re: Basic doubt on Initial Context Factory
            mukesh_babu
            mukesh_babu Nov 5, 2003 6:54 AM (in response to mukesh_babu)

            Hi,
            Thankyou for your response.
            I dont have any properties file in classpath.
            Is there any advantage of specifying the properties while look up instead of using the default properties?

            Regards,
            Vamsee.

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            • 3. Re: Basic doubt on Initial Context Factory
              darranl
              darranl Nov 5, 2003 7:14 AM (in response to mukesh_babu)

              What is the full classpath that you are using for the client and which version of JBoss are you using?

              The connection details have got to be obtained from somewhere.

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              • 4. Re: Basic doubt on Initial Context Factory
                mukesh_babu
                mukesh_babu Nov 5, 2003 10:27 PM (in response to mukesh_babu)

                Hi,
                I am using Jboss 3.0.8 and in my classpath i have only run.jar. Actually i am doing a lookup of local home interface.
                Is it because i am doing a lookup of local home interface i am able to do it without specifying the properties?

                Thanks a lot for your support.
                Regards,
                Vamsee.

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                • 5. Re: Basic doubt on Initial Context Factory
                  darranl
                  darranl Nov 6, 2003 7:32 AM (in response to mukesh_babu)

                  That makes sense now,

                  If you are running a client inside the same JBoss JVM do not provide any properties for the InitialContext and the JBoss defaults will be used.

                  If you are running a client outside of the JBoss JVM you will need to supply all the properties either as properties supplied to the InitialContext constructor or within a jndi.properties file on the classpath.

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