write Junit for JNDI - jndi

Question

I used JNDI connection in my application and it is working. But I need to write Junits to test the connection. We dont use any spring framework. This is the method i wrote to get JNDI connection.
public Connection getConnection() throws SQLException {
DataSource ds = null;
InitialContext ic = null;
Connection con = null;
try {
ic = new InitialContext();
ds = (DataSource) ic.lookup("java:/DBs");
con = ds.getConnection();
return con;
} catch (Exception e) {
throw new SQLException(e);
}
}

Answer 1

You can make use of the SimpleNamingContextBuilder that comes with the spring-test library. You can use this even if you aren't using Spring as it isn't Spring specific.
Below is an example of setting up a JNDI connection in the #Before of the JUnit test.
package com.example;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.mock.jndi.SimpleNamingContextBuilder;
public class SomeTest
{
#Before
public void contextSetup () throws Exception
{
SimpleNamingContextBuilder builder = SimpleNamingContextBuilder.emptyActivatedContextBuilder();
DriverManagerDataSource dataSource = new DriverManagerDataSource("org.hsqldb.jdbcDriver", "jdbc:hsqldb:mem:testdb", "sa", "");
builder.bind("java:comp/env/jdbc/ds1", dataSource);
builder.bind("java:comp/env/jdbc/ds2", dataSource);
}
#Test
public void testSomething () throws Exception
{
/// test with JNDI
}
}
UPDATE: This solution also uses Spring's DriverManagerDataSource. If you want to use that you will also need the spring-jdbc library. But you don't have to use this, you can create any object you like and put it into the SimpleNamingContextBuilder. For example, a DBCP connection pool, a JavaMail Session, etc.

Answer 2

OK. After lot of searching i found a solution.And it is working for me. I want to share this to everybody. Hope this thing might help people who are having the same issue. Please add the below code.Add ojdb6.jar and naming-common-4.1.31.jar in your test libraries
#BeforeClass
public static void setUpClass() throws Exception {
try {
System.setProperty(Context.INITIAL_CONTEXT_FACTORY,
"org.apache.naming.java.javaURLContextFactory");
System.setProperty(Context.URL_PKG_PREFIXES,"org.apache.naming");
InitialContext ic = new InitialContext();
ic.createSubcontext("java:");
ic.createSubcontext("java:/comp");
ic.createSubcontext("java:/comp/env");
ic.createSubcontext("java:/comp/env/jdbc");
OracleConnectionPoolDataSource ocpds = new OracleConnectionPoolDataSource();
ocpds.setURL("your URL");
ocpds.setUser("your username");
ocpds.setPassword("your password");
ic.bind("java:/yourJNDIName", ocpds);
} catch (NamingException ex) {
Logger.getLogger(yourTesTClass.class.getName()).log(Level.SEVERE, null, ex);
}
}

Answer 3

If this is running outside the app server, then you'll likely need to supply parameters to the call for the InitialContext. But also realize that many DataSource implementations are not serializable so they won't work outside the container.
What you're writing is an integration test and it should be run in the container.