EmbeddedConnectionPoolDataSource ds = new EmbeddedConnectionPoolDataSource();
ds.setCreateDatabase("create");
ds.setDatabaseName("target/ExternalVariableTest");
_ds = ds;
_jdbcext = new JdbcExternalVariableModule();
_jdbcext.registerDataSource("testds", _ds);
_server.registerExternalVariableEngine(_jdbcext);
Connection conn = _ds.getConnection();
Statement s = conn.createStatement();