Question

I’m trying to make a connection to an oracle database using the sample codes like this:

public static Connection getConnection() throws ClassNotFoundException {
    Class.forName("oracle.jdbc.driver.OracleDriver");
    Properties env = new Properties();
    //env.put(Context.INITIAL_CONTEXT_FACTORY, "com.ibm.websphere.naming.WsnInitialContextFactory");
    env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
    env.put(Context.PROVIDER_URL, "ldap://192.168.1.1:389/o=myo,dc=mydc,dc=us");
    Connection connection = null;

    try {
        InitialContext context = new InitialContext(env);
        DataSource dataSource = (DataSource) context.lookup("jdbc/DataSource");
        connection = dataSource.getConnection();
    } catch (NamingException e) {
        e.printStackTrace();
    } catch (SQLException e) {
        e.printStackTrace();
    }

    return connection;
}

But it always throw exception like this:

javax.naming.InvalidNameException: jdbc: [LDAP: error code 34 - invalid DN]; remaining name 'jdbc/DataSource'

Where and how should i specify that jdbc/DataSource?

I’m confused as I was given a working project using codes similar as above but nowhere tells what DataSource is.
I’m wondering if jdbc/DataSource should be a DN in LDAP, but I find nothing seem relavent in my given ldap data. Sorry if that question is stupid or not make sense, i’m new to that all stuff.

Thanks!

Answer 1

Having studied for weeks, finally make a solution out as below. Hope this may help others in case they are facing the same issue.

I was to switch a web application from WebSphere to Tomcat which the app get the connections from a directory in WebSphere. Tomcat has no that directory, but it can specify that in server.xml/context.xml/web.xml, but i was never able to make it works! So my solution is to use a file based directory:

public static Connection getConnection() throws ClassNotFoundException {
    Class.forName("oracle.jdbc.driver.OracleDriver");
    Properties env = new Properties();

    env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.fscontext.RefFSContextFactory");
    env.put(Context.PROVIDER_URL, "file:/C://JNDI");

    Connection connection = null;

    try {
        InitialContext context = new InitialContext(env);
        DataSource dataSource = (DataSource) context.lookup("jdbc/DataSource");
        connection = dataSource.getConnection();
    } catch (NamingException e) {
        e.printStackTrace();
    } catch (SQLException e) {
        e.printStackTrace();
    }

    return connection;
}

Just changed two lines in env.put and works fine. But there is some preparation work to create the file based directory and here is the program which create a file C:\JNDI.binding

public static void main(String args[]) throws SQLException, NamingException {

    Context ctx = null;
    try {
        Properties prop = new Properties();
        prop.setProperty(Context.INITIAL_CONTEXT_FACTORY,
                "com.sun.jndi.fscontext.RefFSContextFactory");
        prop.setProperty(Context.PROVIDER_URL, "file:/C:/JNDI");
        ctx = new InitialContext(prop);

        OracleDataSource ds = new OracleDataSource();
        ds.setDriverType("thin");
        ds.setServerName("123.123.123.123");
        ds.setPortNumber(1521);
        ds.setDatabaseName("xe");
        ds.setUser("username");
        ds.setPassword("password");
        ctx.bind("jdbc/DataSource", ds);

    } catch (NamingException ne) {
        System.err.println(ne.getMessage());

        ne.printStackTrace();
    }

}

To make it works in my production websphere and testing tomcat, i just use different INITIAL_CONTEXT_FACTORY settings depends on properties file,

Thanks Olaf for the great help!