In Java,how can I get remote oracle server's system time using a XAOracle datasource

Question

I want to get remote oracle server's system time,for example,I use a TxDataSource:
DRIVER className:weblogic.jdbc.oci.xa.XADataSource
URL:jdbc:weblogic:oracle:lanhaibo
JNDI Name:
the following is the code which shows the exception that: sqlexception:the JDBC2.0
method is not implemented,why? what should I do?:
Properties prop = new Properties();
prop.put(Context.INITIAL_CONTEXT_FACTORY,
"weblogic.jndi.WLInitialContextFactory");
prop.put(Context.PROVIDER_URL,"t3://"+"localhost"+":" + "7001");
initCtx = new InitialContext(prop);
DataSource ds = (DataSource)initCtx.lookup(strDataSource);
Connection conn = ds.getConnection();
String sqlQuery = "select to_char(sysdate,'yyyy') YYYY,to_char(sysdate, 'MM')
MM,to_char(sysdate, '" +
"dd') DD,to_char(sysdate, 'hh24') HH,to_char(sysdate, 'mi') MI,to_char(sysdate,
'" +
"ss') SS from dual"
preparedStatement pstmt = conn.prepareStatement(sqlQury);
StringBuffer sb = new StringBuffer();
ResultSet resultset = pstmt.executeQuery();
if(rs.next()){
strYear = rs.getString("yyyy");
strMonth = rs.getString("MM");
strDay = rs.getString("DD");
strHour = rs.getString("HH");
strMinute = rs.getString("MI");
strSecond = rs.getString("SS");
sb.append(strYear);
sb.append("/");
sb.append(strMonth);
sb.append("/");
sb.append(strDay);
sb.append(" ");
sb.append(strHour);
sb.append(":");
sb.append(strMinute);
sb.append(":");
sb.append(strSecond);

Answer 1

Joden asked:
"I want to get a remote oracle server's time by XADataSource,
use:"select sysdate from dual", but return a null value,and give
the message"sqlexception the jdbc2.0 method is not implemented",
why?"
Let me see your code. A simple executeQuery() should do the trick:
Statement s = c.createStatement();
ResultSet r = s.executeQuery("select sysdate from dual");
while (r.next())
java.sql.Timestamp t = r.getTimestamp(1);
Guillaume Grussenmeyer wrote:
Hi.
I guess you are using weblogic.jdbc.oci.xa.XADataSource as a
datasource.
Weblogic JDriver for Oracle "implementation" is really weak as a lot
of methods are not implemented.
This is why you get this message.
You may find the (very impressive) list of non implemented methods at
http://e-docs.bea.com/wls/docs70/oracle/API_joci.html#1162621 (sorry
HTML links don't seem to work here).
Any call to one of this methods will give you these nasty message and
exception.
Try to use the "official" Oracle JDBC driver XA Datasource
(oracle.jdbc.xa.client.OracleXADataSource) instead of Weblogic JDriver
for Oracle one's.