[LONG]Tomcat jdbc connection pb
From: Gluon (No.Spam_at_cnil.fr)
Date: 08/16/04
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Date: Mon, 16 Aug 2004 12:28:07 +0200
Hy,
i'm newbie with Tomcat and i tried to use Hibernate to build some demo
app. As it fails with the jdbc connection, i move for a more basic
example from jakarta:
Can someone help with this?
Here is the various files:
my webapp is called hibernate:
webapps\hibernate\WEB-INF\web.xml:
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app>
<display-name>Struts with Hibernate</display-name>
<!-- Standard Action Servlet Configuration (with debugging) -->
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>2</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>2</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<!-- Standard Action Servlet Mapping -->
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<!-- The Usual Welcome File List -->
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!-- Struts Tag Library Descriptors -->
<taglib>
<taglib-uri>/tags/struts-bean</taglib-uri>
<taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/tags/struts-html</taglib-uri>
<taglib-location>/WEB-INF/struts-html.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/tags/struts-logic</taglib-uri>
<taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/tags/struts-nested</taglib-uri>
<taglib-location>/WEB-INF/struts-nested.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/tags/struts-tiles</taglib-uri>
<taglib-location>/WEB-INF/struts-tiles.tld</taglib-location>
</taglib>
<!-- -->
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/hibernate</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
Here is the Tomcat 5.0\conf\Catalina\localhost\Hibernate.xml
<?xml version='1.0' encoding='utf-8'?>
<Context displayName="Struts with Hibernate" docBase="hibernate"
path="/Hibernate" reloadable="true" workDir="D:\Program Files\Apache
Software Foundation\Tomcat 5.0\webapps\hibernate\work">
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="hibernateWebApp." timestamp="true" verbosity="0"/>
<Manager className="org.apache.catalina.session.StandardManager"
maxActiveSessions="4" maxInactiveInterval="1800">
</Manager>
<Resource name="jdbc/hibernate" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/hibernate">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<parameter>
<name>validationQuery</name>
<value>select id from item;</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:mysql://localhost:3306/test?autoReconnect=true</value>
</parameter>
<parameter>
<name>password</name>
<value>testuser</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>10</value>
</parameter>
<parameter>
<name>maxWait</name>
<value>1000</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>com.mysql.jdbc.Driver</value>
</parameter>
<parameter>
<name>username</name>
<value>testuser</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>30</value>
</parameter>
</ResourceParams>
</Context>
and now the jsp webapps\hibernate\pages\Test.jsp:
<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<sql:query var="rs" dataSource="jdbc/hibernate">
select * from item
</sql:query>
<html>
<head>
<title>DB Test</title>
</head>
<body>
<h2>Results</h2>
<c:forEach var="row" items="${rs.rows}">
ID ${row.id}<br/>
NAME ${row.name}<br/>
DESCRIPTION ${row.description}<br/>
</c:forEach>
</body>
</html>
the mySQL connection works fine:
C:\mysql\bin>mysql test -utestuser -ptestuser
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2 to server version: 4.0.20a-nt-max
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| item |
+----------------+
1 row in set (0.05 sec)
mysql> show columns in item;
+-------------+-------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+-------------+------+-----+---------+----------------+
| id | bigint(11) | | PRI | NULL | auto_increment |
| name | varchar(32) | | | | |
| description | longtext | YES | | NULL | |
+-------------+-------------+------+-----+---------+----------------+
3 rows in set (0.05 sec)
but the servelt raise the following exception:
javax.servlet.ServletException: Unable to get connection, DataSource
invalid: "org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC
driver of class '' for connect URL 'null'"
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.pages.Test_jsp._jspService(Test_jsp.java:81)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:298)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
cause mère
javax.servlet.jsp.JspException: Unable to get connection, DataSource
invalid: "org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC
driver of class '' for connect URL 'null'"
org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.getConnection(QueryTagSupport.java:276)
org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.doStartTag(QueryTagSupport.java:159)
org.apache.jsp.pages.Test_jsp._jspx_meth_sql_query_0(Test_jsp.java:100)
org.apache.jsp.pages.Test_jsp._jspService(Test_jsp.java:58)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:298)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
- Next message: Wolfgang Ott: "Re: executeUpdate with InnoDB"
- Previous message: Wolfgang Ott: "executeUpdate with InnoDB"
- Next in thread: Gluon: "Re: [LONG]Tomcat jdbc connection pb"
- Reply: Gluon: "Re: [LONG]Tomcat jdbc connection pb"
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