Injecting_jndi_datasources

Question

I know in standalone client cannot access java:comp/env which is used in my server application from my previous post, so I try another method as follow to test the server method
public void getEnvironment() throws Exception{
     try{
          System.setProperty(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
          /*System.setProperty(Context.PROVIDER_URL, "t3://127.0.0.1:7001");
          System.setProperty(Context.SECURITY_PRINCIPAL, "weblogic");
          System.setProperty(Context.SECURITY_CREDENTIALS, "password");*/
          InitialContext ic = new InitialContext();
          ic.createSubcontext("java:");
          ic.createSubcontext("java:/comp");
          ic.createSubcontext("java:/comp/env");
          ic.createSubcontext("java:/comp/env/jdbc");               
          // Construcvt Datasource
          OracleConnectionPoolDataSource ds = new OracleConnectionPoolDataSource();          
          ds.setURL("jdbc:oracle:thin:@cdcehr29:14985");
          ds.setUser("als_app_ro_user");
          ds.setPassword("ai1pass");
          //Connection conn = ds.getConnection();
          ic.bind("java:/comp/env/jdbc/test", ds);
          System.out.println("see?");
          Context envIc = (Context) ic.lookup("java:/comp/env");
          envIc.bind("THIS_SERVICE_CD", "");
          envIc.bind("THIS_SERVICE_VER", "");
          envIc.bind("SERVICE_DATA_SOURCE_JNDI", "jdbc/test");
          envIc.bind("ALS_PROJECT_CD", "");
          envIc.bind("ALS_SYSTEM_CD", "");
          envIc.bind("EHR_CONFIG_DATA_SOURCE_JNDI", "");
          envIc.bind("SGR_PATH", "");
          envIc.bind("AUDIT_TABLE_NAME", "");
          envIc.bind("DEBUG_TABLE_NAME", "");
          InitialContext ic2 = new InitialContext();
          Context ctx = (Context)ic2.lookup("java:/comp/env");  // error
          //Context ctx = (Context)ic2.lookup("java:comp/env");
          System.out.println("see2?");
     }catch(NamingException ex){
          ex.printStackTrace();
     }catch(Exception ex){
          ex.printStackTrace();
}but when the code run to
Context ctx = (Context)ic2.lookup("java:/comp/env"); // error
error as following is thrown
>
javax.naming.NameNotFoundException: remaining name: /comp/env
     at weblogic.j2eeclient.SimpleContext.resolve(SimpleContext.java:35)
     at weblogic.j2eeclient.SimpleContext.resolve(SimpleContext.java:39)
     at weblogic.j2eeclient.SimpleContext.lookup(SimpleContext.java:59)
     at weblogic.j2eeclient.SimpleContext.lookup(SimpleContext.java:64)
     at weblogic.jndi.factories.java.ReadOnlyContextWrapper.lookup(ReadOnlyContextWrapper.java:45)
     at weblogic.jndi.internal.AbstractURLContext.lookup(AbstractURLContext.java:130)
     at javax.naming.InitialContext.lookup(InitialContext.java:392)
     at jdbc.test.ConnectOracle.getEnvironment(ConnectOracle.java:84)
     at jdbc.test.ConnectOracle.main(ConnectOracle.java:178)
what is the reason?
I get this inspiration from a website [https://blogs.oracle.com/randystuph/entry/injecting_jndi_datasources_for_junit|https://blogs.oracle.com/randystuph/entry/injecting_jndi_datasources_for_junit]
which mention
>
Context initContext = new InitialContext();
Context webContext = (Context)initContext.lookup("java:/comp/env");
after create the initialcontext in @BeforeClass

Answer 1

seem the problem related to
System.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.apache.naming.java.javaURLContextFactory");
System.setProperty(Context.URL_PKG_PREFIXES, "org.apache.naming");because the following has no error when create the second InitialContext() and then called
Context webContext = (Context) initContext.lookup("java:/comp/env");
public void getEnvironment() throws Exception{
    try {
            System.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.apache.naming.java.javaURLContextFactory");
            System.setProperty(Context.URL_PKG_PREFIXES, "org.apache.naming");
               /* if using these, will throw error
                * createSubcontext not allowed in a ReadOnlyContext;remaining name ''
                * when call initialContext.createSubcontext("java:/comp");
             System.setProperty(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
             System.setProperty(Context.URL_PKG_PREFIXES, "weblogic.jndi.factories:weblogic.corba.j2ee.naming.url");
            InitialContext initialContext = new InitialContext();
            initialContext.createSubcontext("java:");
            initialContext.createSubcontext("java:/comp");
            initialContext.createSubcontext("java:/comp/env");
            initialContext.createSubcontext("java:/comp/env/jdbc");
            Context initContext = new InitialContext();
            Context webContext = (Context) initContext.lookup("java:/comp/env");
            //DataSource dataSource = (DataSource) webContext.lookup("jdbc/mydatasourcename1");
            System.out.println("see");
        catch (NamingException ne) {
            System.err.println("Problem with the jndi name.");
            ne.printStackTrace();
}But the detail reason is still unknown, anyone could help?