public class TestingJndiDatasource {

    private static final String driver = "org.postgresql.Driver";
    private static final String url = "jdbc:postgresql://localhost/dotcms";
    private static final String username = "postgres";
    private static final String password = "postgres";
    private static final int maxTotal = 60;
    private static Hashtable<String, DataSource> dataSources = new Hashtable<>();


    public static void init() throws Exception {

        NamingManager.setInitialContextFactoryBuilder(new InitialContextFactoryBuilder() {


            @Override
            public InitialContextFactory createInitialContextFactory(Hashtable<?, ?> environment)
                    throws NamingException {
                return new InitialContextFactory() {

                    @Override
                    public Context getInitialContext(Hashtable<?, ?> environment)
                            throws NamingException {
                        return new InitialContext() {

                            @Override
                            public Object lookup(String name) throws NamingException {

                                if (dataSources.isEmpty()) { // init datasources

                                    BasicDataSource dataSource = new BasicDataSource();
                                    dataSource.setDriverClassName(driver);
                                    dataSource.setUrl(url);
                                    dataSource.setUsername(username);
                                    dataSource.setPassword(password);
                                    dataSource.setRemoveAbandoned(true);
                                    dataSource.setLogAbandoned(true);
                                    dataSource.setMaxIdle(10);
                                    dataSource.setMaxActive(60);
                                    dataSources.put("jdbc/dotCMSPool", dataSource);

                                }

                                if (dataSources.containsKey(name)) {
                                    return dataSources.get(name);
                                }

                                throw new NamingException("Unable to find datasource: " + name);
                            }
                        };
                    }

                };
            }

        });

    }
}