Hi guys,
/usr/local/tomcat5/webapps/Advanced/WEB-INF/web.xml
===========================================================
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<description>mySQL Test App</description>
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/BooksDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
===========================================================
/usr/local/tomcat5/conf/server.xml
===========================================================
.............
<Context path="/Advanced" docBase="Advanced" debug="5" reloadable="true" crossContext="true">
<Logger className="org.apache.catalina.logger.FileLogger" prefix="Wrox_Advanced_log."
suffix=".txt" timestamp="true"/>
<ResourceParams name="jdbc/BooksDB" auth="Container" type="javax.sql.DataSource">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>100</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>30000</value>
</parameter>
<parameter>
<name>maxWait</name>
<value>100</value>
</parameter>
<parameter>
<name>username</name>
<value>booksuser</value>
</parameter>
<parameter>
<name>password</name>
<value>bookspass</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>org.gjt.mm.mysql.Driver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:mysql://192.1.3.57:3306/books</value>
</parameter>
</ResourceParams>
</Context>
</Host>
</Engine>
</Service>
</Server>
===========================================================
/usr/local/tomcat5/webapps/Advanced/connect.jsp
===========================================================
<html>
<head>
<title>Connection Test</title>
</head>
<body>
<%
com.wrox.library.Connect con = new com.wrox.library.Connect();
con.init();
%>
<h2>Connection Result</h2>
<%= con.getstat() %>
</body>
</html>
===========================================================
/usr/local/tomcat5/webapps/Advanced/WEB-INF/classes/com/wrox/library/Connect.java
===========================================================
package com.wrox.library;
import javax.naming.*;
import javax.sql.*;
import java.sql.*;
public class Connect {
String stat = "Not Connected";
public void init() {
try {
stat = "1";
Context ctx = new InitialContext();
stat = "2";
if(ctx == null )
throw new Exception("Oops - No Context");
stat = "3";
DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/BooksDB");
stat = "4";
if (ds != null) {
Connection conn = ds.getConnection();
stat = "5";
if(conn != null) {
stat = " Got Connection "+conn.toString();
conn.close();
}
}
} catch(Exception e) {
e.printStackTrace();
}
}
public String getstat() {
return stat;
}
}
===========================================================
When I tried to display connect.jsp, what I got display on IE6 is as follow:
=================================================
Connection Results
4
==================================================
Which means that the Connect.class unable to get the DataSource, for which the DataSource is NULL. Pls help !!
/usr/local/tomcat5/webapps/Advanced/WEB-INF/web.xml
===========================================================
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<description>mySQL Test App</description>
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/BooksDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
===========================================================
/usr/local/tomcat5/conf/server.xml
===========================================================
.............
<Context path="/Advanced" docBase="Advanced" debug="5" reloadable="true" crossContext="true">
<Logger className="org.apache.catalina.logger.FileLogger" prefix="Wrox_Advanced_log."
suffix=".txt" timestamp="true"/>
<ResourceParams name="jdbc/BooksDB" auth="Container" type="javax.sql.DataSource">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>100</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>30000</value>
</parameter>
<parameter>
<name>maxWait</name>
<value>100</value>
</parameter>
<parameter>
<name>username</name>
<value>booksuser</value>
</parameter>
<parameter>
<name>password</name>
<value>bookspass</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>org.gjt.mm.mysql.Driver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:mysql://192.1.3.57:3306/books</value>
</parameter>
</ResourceParams>
</Context>
</Host>
</Engine>
</Service>
</Server>
===========================================================
/usr/local/tomcat5/webapps/Advanced/connect.jsp
===========================================================
<html>
<head>
<title>Connection Test</title>
</head>
<body>
<%
com.wrox.library.Connect con = new com.wrox.library.Connect();
con.init();
%>
<h2>Connection Result</h2>
<%= con.getstat() %>
</body>
</html>
===========================================================
/usr/local/tomcat5/webapps/Advanced/WEB-INF/classes/com/wrox/library/Connect.java
===========================================================
package com.wrox.library;
import javax.naming.*;
import javax.sql.*;
import java.sql.*;
public class Connect {
String stat = "Not Connected";
public void init() {
try {
stat = "1";
Context ctx = new InitialContext();
stat = "2";
if(ctx == null )
throw new Exception("Oops - No Context");
stat = "3";
DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/BooksDB");
stat = "4";
if (ds != null) {
Connection conn = ds.getConnection();
stat = "5";
if(conn != null) {
stat = " Got Connection "+conn.toString();
conn.close();
}
}
} catch(Exception e) {
e.printStackTrace();
}
}
public String getstat() {
return stat;
}
}
===========================================================
When I tried to display connect.jsp, what I got display on IE6 is as follow:
=================================================
Connection Results
4
==================================================
Which means that the Connect.class unable to get the DataSource, for which the DataSource is NULL. Pls help !!
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