Commons DBCP problem

Hi friends,
I am implementing the Commons DBCP package in one of my JSP pages.
This is the scenario :
In my CATALINA_HOME/common/lib I have the files :
commons-dbcp-1.1.jar
commons-pool-1.1.jar
commons-collections.jar
I have set the CLASSPATHS in my Environment variables to the appropriate JARs.
I have added a Context to my server.xml file as :

<Context path="/CPool" docBase="CPool" debug="5" reloadable="true" crossContext="true">
<Logger className="org.apache.catalina.logger.FileLogger" prefix="localhost_CPool_Log." suffix=".txt" timestamp="true"/>
<Resource name="jdbc/test_dsn" auth="Container" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/test_dsn">
<parameter>
          <name>factory</name>
          <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
     </parameter>
     <parameter>
          <name>maxActive</name> 
          <value>0</value> 
     </parameter>
     <parameter>
          <name>maxIdle</name> 
          <value>0</value> 
     </parameter>
     <parameter>
     <name>maxWait</name> 
          <value>10000</value> 
     </parameter>
     
     <parameter>
          <name>username</name>
          <value></value>
          <name>password</name>
          <value></value>
     </parameter>

     <parameter>
          <name>driverClassName</name>
          <value>org.gjt.mm.mysql.Driver</value>
     </parameter>
     
     <parameter>
          <name>url</name>
          <value>jdbc:mysql://localhost:8080/omamconsultants_com?autoreconnect=true</value>
     </parameter>
     </ResourceParams>
</Context>
and I have made a new web.xml file in my CPool/WEB-INF directory as :
<web-app>
<description> MySQL Test Application for Connection Pooling.</description>

<resource-ref>
     <description>Connection Pooling</description>
     <res-ref-name>jdbc/test_dsn</res-ref-name>
     <res-type>javax.sql.DataSource</res-type>
     <res-auth>Container</res-auth>
</resource-ref>
</web-app>
Finally, I have made a JSP to access the database table as :
<%
int i=0;
try
Context ctx = new InitialContext();
     if (ctx == null)
          throw new Exception("No Context available");
     DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/test_dsn");
     if (ds != null)
          Connection con = ds.getConnection();
          if (con != null)
               System.out.println("Connection " + con.toString() + " established.");
               Statement stmt = con.createStatement();
               ResultSet rs = stmt.executeQuery("SELECT * FROM t_sherbir");
               while (rs.next())
                    System.out.println("Fetching record " + (i+1) + " from table...");
               con.close();
catch(Exception e) {}
%>
But when I run the program, I am getting this error :
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 18 in the jsp file: /CPool/pool2.jsp
Generated servlet error:
[javac] Compiling 1 source file
C:\jakarta-tomcat-4.1.29\work\Standalone\localhost\examples\CPool\pool2_jsp.java:76: cannot resolve symbol
symbol : class DataSource
location: class org.apache.jsp.pool2_jsp
     DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/test_dsn");
^
An error occurred at line: 18 in the jsp file: /CPool/pool2.jsp
Generated servlet error:
C:\jakarta-tomcat-4.1.29\work\Standalone\localhost\examples\CPool\pool2_jsp.java:76: cannot resolve symbol
symbol : class DataSource
location: class org.apache.jsp.pool2_jsp
     DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/test_dsn");
^
2 errors
     at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:130)
     at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:293)
     at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:353)
     at org.apache.jasper.compiler.Compiler.compile(Compiler.java:370)
     at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:473)
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:190)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:781)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:549)
     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:589)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:666)
     at java.lang.Thread.run(Thread.java:536)
So any1 has an idea where I'm going wrong ?
Please help immediately.

It seems to be a simple issue :). You need to import the relevant classes in your JSP file. To access the data source the following classes need to be imported.
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;
You also need to import JDBC related classes - ResultSet, Statement etc.

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***uploadPhoto.jsp ***
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="org.apache.commons.fileupload.*"%>
<%@ page import="org.apache.commons.fileupload.servlet.*"%>
<%@ page import="org.apache.commons.fileupload.portlet.*"%>
<%@ page import="org.apache.commons.collections.*"%>
<%@ page import="java.util.*"%>
<%
     boolean isMultipart = ServletFileUpload.isMultipartContent(request);
     out.println("" + isMultipart);
//      Parse the request
     FileItemIterator iter = upload.getItemIterator(request);
     while (iter.hasNext()) {
         FileItemStream item = iter.next();
         String name = item.getFieldName();
         InputStream stream = item.openStream();
         if (item.isFormField()) {
             out.println("Form field " + name + " with value "
                 + StreamUtil.asString(stream) + " detected.");
         } else {
             out.println("File field " + name + " with file name "
                 + item.getName() + " detected.");
             // Process the input stream
%>The first line returns true. So I know I have a file. But the next one I get an error saying "Cannot find type FileItemIterator.
I tried to include as much libraries as I thought needed, but still the same error.
I have put the commons fileupload jar in my WEB-INF/lib directory, and also in my application.jar file.
Can someone help me please?
Message was edited by:
asgshe

Yes I found this out right before you posted it.
I think the documentation is very poor. No where did
it say that I needed this. Luckily I read a post here
that someone had suggested this.I have to disagree on that! It is mentioned here: http://jakarta.apache.org/commons/fileupload/using.html and here: http://jakarta.apache.org/commons/fileupload/dependencies.html
Where else should they mention it?

Commons DBCP problem

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