Identifying connection/datasource by application name, machine and user

Question

Hi,
I am implementing a Java app to gather few connection related statistics. As part of this, in the JDBC layer, I want to identify the connection by app name, os/app user and client's machine name. I searched for all the ways an oracle app would set these attributes. I have some queries around them, will be grateful if somone can respond and clarify them. Here are my findings/observations
*1. DataSource.setConnectionProperties() with v$session param and values for program, osuser, machine*
It appears setting the v$session.program, v$session.osuser and v$session.machine on datasource is a preferred way to set the client information for v10.2 and higher. Is my assumption that this is the predominant/preferred way oracle apps would set the client information valid ?
     Properties props = new Properties();
     props.put("v$session.program", "OracleApp");
     props.put("v$session.osuser", "human");
     props.put("v$session.machine", "dale");
     ds.setConnectionProperties(props);*2. OracleConnection.setClientData() with key-value*
There is a method setClientData but available only with OracleConnection as class referrence (needs cast). It seems to be a deprecated in 10g. Does anyone know why is this deprecated and replaced by what ? Hope it is not deprecated due to JDBC 4.0 spec, which is not supported by Oracle
     OracleConnection conn_ = (OracleConnection) con;
     conn_.setClientData("ApplicationName", "OracleApp");
     conn_.setClientData("ClientHostname", "dale");
     conn_.setClientData("ClientUser", "human");*3. Connection.setClientInfo() with ApplicationName, ClientHostname, ClientUser*
Apparently, JDBC 4.0 has exposed api-s to set/get clientInfo values that I am looking for. But surprisingly, oracle doesn't seem to have correctly implemented these methods. I get SQLClientInfoException for the above values and when I do DatabaseMetaData.getClientInfoProperties I get empty Properties object. Does this indicate 0 keys are supported ? Or is there any special setting/configuration I have to executed to allow setting of keys?
     ResultSet clientInfoProperties = con.getMetaData().getClientInfoProperties();
     while (clientInfoProperties.next()) { // next() returns false
          System.out.println(clientInfoProperties.getString(1));
     Properties properties = new Properties();
     properties.put("ApplicationName", "OracleApp");
     properties.put("ClientHostname", "dale");
     properties.put("ClientUser", "human");
     con.setClientInfo(properties);
     // throws java.sql.SQLClientInfoException and e.getFailedProperties() returns
     // {ClientUser=REASON_UNKNOWN, ApplicationName=REASON_UNKNOWN, ClientHostname=REASON_UNKNOWN}
     // and e.getMessage() returns Invalid or unsupported name for clientInfo.*4. Other ways to set/get client info using connection or datasource ?*
Apart from the above, are there other ways to set/get client info on connection or datasource objects ? how do oracle apps in general handle this kind of need.
If someone has some insight on my queries, will appreciate if you can spare some time replying to this thread.
Thanks
Rajesh

Answer 1

bumping it up. Can anyone help ?
-Rajesh