Troy, I'd suggest you not use the JSTL SQL tags, ever, because that embeds activity into your JSP that really, desperately shouldn't be there. It's one thing to do so in a hacked-together app that has a short lifecycle or is understandably and vibrantly underarchitected, but to do so in a production application is... a scary thought.
SQL tags are the sort of thing I'd really hoped the JSTL would have avoided. >From: "Campano, Troy" <[EMAIL PROTECTED]> >Reply-To: A mailing list about Java Server Pages specification and >reference <[EMAIL PROTECTED]> >To: [EMAIL PROTECTED] >Subject: JSTL and Connection Pooling >Date: Mon, 7 Oct 2002 15:55:11 -0400 > > Hello, >I am having a problem trying to figure out JSTL with connection pooling. >I am using Tomcat. I understand that <sql:setDataSource> can't handle >connection pooling. > > > So I create a datasource the way I always do without JSTL (using >JNDI). >I'm having a problem passing that connection to <sql:query> >I don't know how to use variables in the tags. > > My datasource is called 'ds', but I don't know how to use it with >sql:query. > > pageScope.ds doesn't work. > > I'm a complete JSTL newbie and totally confused. > > > Does anyone have any ideas? > > Below is the code > > > thank you for the help! > > > Troy Campano > > > ------------------------- CODE HERE >----------------------------------------- > > > <%@ page contentType="text/html; charset=iso-8859-1" >language="java" >import="java.sql.*,javax.sql.*,oracle.jdbc.pool.*,javax.naming.*,java.io.*" >%> > > <%@ taglib prefix="mt" >uri="http://jakarta.apache.org/taglibs/mailer-1.0 ><http://jakarta.apache.org/taglibs/mailer-1.0> " %> ><%@ taglib prefix="c" uri="http://java.sun.com/jstl/core ><http://java.sun.com/jstl/core> " %> ><%@ taglib prefix="sql" uri="http://java.sun.com/jstl/sql ><http://java.sun.com/jstl/sql> " %> >Step 1: Starting Page<br> ><br> >Step 2: Creating a list of groups to get the report > > > > <% >Connection conn = null; >try >{ >//************************************************************************** >*********************** >// Request Connection from Connection Pool >//************************************************************************** >*********************** >Context initContext = new InitialContext(); >Context envContext = (Context) initContext.lookup("java:/comp/env"); >DataSource ds = (DataSource) envContext.lookup("jdbc/ReportManagerPool"); >conn = ds.getConnection(); >//************************************************************************** >*********************** >%> > > > > > > <sql:query dataSource="${pageScope.ds}" var="myresultset" >sql="SELECT table_name FROM all_tables" /> > > > > > <% >} >catch(SQLException e) >{ > throw new SQLException(e.getMessage()); >} > > finally > { > if (conn != null) > { > try > { > conn.close(); > } > catch (SQLException e) > { > // Nothing coherent to do here. > // Pray nothing else goes wrong. > e.printStackTrace(); > } > } > } >%> > >=========================================================================== >To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff >JSP-INTEREST". >For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST >DIGEST". >Some relevant FAQs on JSP/Servlets can be found at: > > http://archives.java.sun.com/jsp-interest.html > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.jsp > http://www.jguru.com/faq/index.jsp > http://www.jspinsider.com ----------------------------------------------- Joseph B. Ottinger [EMAIL PROTECTED] http://enigmastation.com IT Consultant _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx =========================================================================== To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant FAQs on JSP/Servlets can be found at: http://archives.java.sun.com/jsp-interest.html http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.jsp http://www.jguru.com/faq/index.jsp http://www.jspinsider.com
