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From Alexa Petrean <>
Subject Re: JDBC Realm Questions Tomcat 3.2.2
Date Thu, 05 Jul 2001 13:21:27 GMT

I think I have a similar problem, but for Tomcat3.2.1 (NT platform). The ideea
is that I've configured the server.xml to access an Oracle DB, like this:

            roleNameCol="RolName" />

As I know, to give role based access to the users, we have to configure web.xml
for the application. Here is a sample, from my app:


Now, when somebody wants to access myServlet resource, he/she must have the role
of an Administrator or Operator. I think this should be checked into the
database.  The problem is that, when I've tried to access myServlet for the
first time, the following message was generated in the tomcat console:

2001-07-05 04:11:49 - ContextManager: JDBCRealm: JDBCRealm.authenticate: SELECT
2001-07-05 04:11:50 - ContextManager: JDBCRealm: Authentication unsuccessful for
user null

In the same time, the login window has appeard on Netscape browser, but after
I'd entered a valid user name and password (from myUserTable) the message was
the same:

2001-07-05 04:14:19 - ContextManager: JDBCRealm: Authentication unsuccessful for
user null

It seems for me that the user name is null every time, no matter if I enter a
valid (user, passwd) or not. Is that a Tomcat bug, or I've missed something....?

Any ideea would be highly appreciated


"Rajehswar V. Rao" wrote:

> I am looking for same....
> -----Original Message-----
> From: []
> Sent: Thursday, July 05, 2001 4:02 AM
> To:
> Subject: Fwd:JDBC Realm Questions Tomcat 3.2.2
> Someone please respond to these questions so I know whether JDBC Realms are
> a
> supported feature of Tomcat3.2.2. I posted the question a few days ago and
> have
> gotten no responses.
> Has anyone been successful in referencing a jdbc datasource configured in
> the
> server.xml of Tomcat 3.2.2? If so, how?
> Jonathan
> ____________________Forward Header_____________________
> Subject:    JDBC Realm Questions Tomcat 3.2.2
> Author:
> Date:       7/3/2001 8:21 PM
> This may be a stupid question but I've found hundreds of messages from
> confused
> users on the subject of JDBC Realms and Tomcat and no good explanation or
> example. There is a documentation file JDBCRealm.howto but it doesn't
> describe
> how to instantiate the datasource with a code example or what additional
> property files need to be included to configure jndi properties.
> Like lots of other people, I'm trying to use the release Tomcat 3.2.2,
> configure
> multiple jdbc datasources in the server.xml file, and reference it in my
> servlet. I am only interested in using a shared database ID to connect to
> the
> database for all users of my servlet. The database connect info needs to be
> in
> Tomcat conf files since the passwords need to be reconfigured at deployment
> time
> outside my war file.
> 1. Is this behavior supported by Tomcat 3.2.2? How do I configure multiple
> database datasources and instantiate them in my code?
> 2. Assuming I setup the datasources like below, what properties do I use to
> assign a name to the datasource so I can reference it?
> <RequestInterceptor
>     className="org.apache.tomcat.request.JDBCRealm"
>     debug="99"
>     driverName="oracle.jdbc.driver.OracleDriver"
>     connectionURL="jdbc:oracle:thin:@ntserver:1521:ORCL"
>     connectionName="scott"
>     connectionPassword="tiger"
> />
> <RequestInterceptor
>     className="org.apache.tomcat.request.JDBCRealm"
>     debug="99"
>     driverName="oracle.jdbc.driver.OracleDriver"
>     connectionURL="jdbc:oracle:thin:@ntserver2:1521:ORCL"
>     connectionName="scott"
>     connectionPassword="tiger"
> />
> 3. What do I need to add to a config file in order to access the initial
> context
> so I can retrieve the datasource?
> import javax.servlet.*;
> import javax.servlet.http.*;
> import javax.naming.*;
> import javax.sql.*;
> String          theDataSourceName = "???";
> String          theNamingProviderURL = "???";
> String          theInitialContextNamingFactory = "???";
> Properties theProperties = new Properties ();
> theProperties.put("java.naming.provider.url", theNamingProviderURL);
> theProperties.put("java.naming.factory.initial",theInitialContextNamingFacto
> ry);
> Context theInitialContext = new InitialContext(theProperties);
> DataSource theDataSource = (DataSource) theInitialContext.lookup
> (theDatasourceName);

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