OracleDataSource vs. Oracle UCP PoolDataSource

Question

I was researching some JDBC Oracle Connection Pooling items and came across a new(er) Oracle Pool implementation called Universal Connection Pool (UCP). Now this uses a new

Answer 1

I tried ucp and the performance is better... May be the key is using this

oracle.ucp.jdbc.PoolDataSource ds = (oracle.ucp.jdbc.PoolDataSource)envContext.lookup(url_r);
MyConnectionLabelingCallback callback = new MyConnectionLabelingCallback();
ds.registerConnectionLabelingCallback( callback );


Properties label = new Properties();
label.setProperty(pname, KEY);
conn = ds.getConnection(label);

This helps to borrow the connection and never closing it.. so the performance is great

The code for the callback class is

public class MyConnectionLabelingCallback
implements ConnectionLabelingCallback {

      public MyConnectionLabelingCallback()
      {
      }

      public int cost(Properties reqLabels, Properties currentLabels)
      {

        // Case 1: exact match
        if (reqLabels.equals(currentLabels))
        {
          System.out.println("## Exact match found!! ##");
          return 0;
        }

        // Case 2: some labels match with no unmatched labels
        String iso1 = (String) reqLabels.get("TRANSACTION_ISOLATION");
        String iso2 = (String) currentLabels.get("TRANSACTION_ISOLATION");
        boolean match =
          (iso1 != null && iso2 != null && iso1.equalsIgnoreCase(iso2));
        Set rKeys = reqLabels.keySet();
        Set cKeys = currentLabels.keySet();
        if (match && rKeys.containsAll(cKeys))
        {
          System.out.println("## Partial match found!! ##");
          return 10;
        }

        // No label matches to application's preference.
        // Do not choose this connection.
        System.out.println("## No match found!! ##");
        return Integer.MAX_VALUE;
      }

      public boolean configure(Properties reqLabels, Object conn)
      {

          System.out.println("Configure################");
        try
        {
          String isoStr = (String) reqLabels.get("TRANSACTION_ISOLATION");
          ((Connection)conn).setTransactionIsolation(Integer.valueOf(isoStr));
          LabelableConnection lconn = (LabelableConnection) conn;

          // Find the unmatched labels on this connection
          Properties unmatchedLabels =
           lconn.getUnmatchedConnectionLabels(reqLabels);

          // Apply each label  in unmatchedLabels to conn
          for (Map.Entry label : unmatchedLabels.entrySet())
          {
            String key = (String) label.getKey();
            String value = (String) label.getValue();
            lconn.applyConnectionLabel(key, value);
          }
        }
        catch (Exception exc)
        {

          return false;
        }
        return true;
      }
    }