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POJava JDBC Connection Pooling (How to check)?
 

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    <p>First of all, I'm new to <code>Java/JSP/Eclipse</code>. However, I've many many years of .Net experience. I have just learned in Java how to make a connection to MS SQL Server using the <code>javax.sql.DataSource</code> (so that I don't need to key in the userid/password).</p> <p>Right now, I've created a class to handle DB query, and in that class, I have a function that I can just call to return a <code>RowSet</code>.</p> <pre><code> import javax.naming.Context; import javax.naming.InitialContext; import java.sql.Connection; import javax.sql.DataSource; import javax.sql.rowset.JdbcRowSet; import com.sun.rowset.JdbcRowSetImpl; public abstract class ClsDBAccessBASE { public boolean prbAutoCommit = true; public String prsDataSourceName = ""; public ClsDBAccessBASE( String pvsDataSourceName ) { prsDataSourceName = pvsDataSourceName; } public JdbcRowSet fnorsSQLText( String pvsSQLText ) { JdbcRowSet voRS = null; try { Context voContext = new InitialContext(); DataSource voDS = (DataSource)voContext.lookup(prsDataSourceName); Connection voConn = (Connection)voDS.getConnection(); voRS = new JdbcRowSetImpl((voConn.createStatement()).executeQuery(pvsSQLText)); } catch (Exception e) {e.printStackTrace();} return voRS; } } } </code></pre> <p>My objective is to ensure that I am using Connection Pooling. I understand that the <code>JdbcRowSet</code> implements that automatically? However, the problem (I think) is that I am casting the <code>(voConn.createStatement()).executeQuery(pvsSQLText)</code> from a <code>ResultSet</code> to a <code>JdbcRowSet</code>. Would this mean that the underlying connection used is still <code>ResultSet</code>? and not <code>RowSet</code>? Is there a way for me to check that I am indeed using Connection Pooling?</p> <p>I'm sorry, if my question sounds silly. I am very new to Java development &amp; Eclipse. Please bear with me and I will appreciate any guidance you can provide me.</p> <p>I am using: <code>sqljdbc4.jar</code> from <code>Microsoft</code> (which seems to give me error whenever I call the <code>JdbcRowSet.execute()</code> function and/or .next() function. Something about NullReference. But that's another problem.</p>
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