JDBC Realm help

Question

Hi,
I have been trying to get the JDBC Realm to work, but with no success,
I get the following error:
Catalina.start: LifecycleException: Exception opening database connection: java.sql.SQLException
LifecycleException: Exception opening database connection: java.sql.SQLException
(see bottom of page for more detail)
I have successfully connected to the database and retrieved data using the following code
// Define the JDBP Driver and the database connection URL
public static final String driver = "org.gjt.mm.mysql.Driver";
public static final String url = "jdbc:mysql://localhost/db?user=un&password=pw";
public static void main(String args[])
Connection conn;
try
Class.forName(driver); // load the driver dynamically
conn = DriverManager.getConnection(url); // connect to the database
// perform a query. first create a Statement object from the connection
Statement select = conn.createStatement();
// next execute a query (SQL string) and return the results in a ResultSet object
ResultSet result = select.executeQuery("select * from users");
// print out the results
while(result.next())
String user = result.getString("user_name"); // note these match the columns in the
String password = result.getString("user_pass"); // SELECT statement
System.out.println(user + " " + password);
select.close(); //Close the query
conn.close(); //Close the database connection
however I have no luck in connecting using the JDBC Realm, I am using j2re1.4.1_01, jwsdp-1_0_01 & mysql-connector-java-3.1.0-alpha and the com & org directories are in $JWSDP_HOME/common/lib/ I have also put a copy of the mysql-connector-java-3.1.0-alpha.jar in $JWSDP_HOME/server/lib/ in an effort to get this to work!!
my $JWSDP_HOME/conf/server.xml contains
<Realm className="org.apache.catalina.realm.JDBCRealm" debug="99" driver="org.gjt.mm.mysql.Driver"
connectionURL="jdbc:mysql://localhost/db?user=un;password=pw"
userTable="users" usserNameCol="user_name" userCredCol="user_pass"
userRoleTable="user_roles" roleNameCol="role_name" />
I hope someone can shed some light on this as I have been reading a lot of threads about this however they all seem to have the driver name included in the Exception error and I don't get that in the error message, so I am assuming that the driver is working and there is another error.....
Cheers in advance
Contentents of $JWSDP_HOME/logs/catalina.outStarting service Internal Services
Java Web Services Developer Pack/1.0_01-fcs
Catalina.start: LifecycleException: Exception opening database connection: java.sql.SQLException
LifecycleException: Exception opening database connection: java.sql.SQLException
at org.apache.catalina.realm.JDBCRealm.start(JDBCRealm.java:683)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1175)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347)
at org.apache.catalina.core.StandardService.start(StandardService.java:499)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:2187)
at org.apache.catalina.startup.Catalina.start(Catalina.java:504)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:399)
at org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.launcher.Launcher.main(Launcher.java:208)
----- Root Cause -----
java.sql.SQLException
at org.apache.catalina.realm.JDBCRealm.open(JDBCRealm.java:606)
at org.apache.catalina.realm.JDBCRealm.start(JDBCRealm.java:681)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1175)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347)
at org.apache.catalina.core.StandardService.start(StandardService.java:499)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:2187)
at org.apache.catalina.startup.Catalina.start(Catalina.java:504)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:399)
at org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.launcher.Launcher.main(Launcher.java:208)
Stopping service Internal Services
Catalina.stop: LifecycleException: Coyote connector has not been started
LifecycleException: Coyote connector has not been started
at org.apache.coyote.tomcat4.CoyoteConnector.stop(CoyoteConnector.java:1043)
at org.apache.catalina.core.StandardService.stop(StandardService.java:549)
at org.apache.catalina.core.StandardServer.stop(StandardServer.java:2223)
at org.apache.catalina.startup.Catalina.start(Catalina.java:535)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:399)
logs/catalina.out

Answer 1

okayyyy.... now i got ur point. I think its not much
difficult. Lets take it step-by-step.
That's what I thought and it's still not working .....
As a first step, you have to create 3 tables in your
mySql database for authentication purposes. Lets name
those tables: (1) user, (2) roles (3) user_roles.
'user' will contain fields regarding user name and
password, 'roles' will contain only 1 field specific
to role names and finally 'user_roles' is a mapping
table which contain user names and their
corresponding role names (obviously from 'roles'
table). This completes the database in mySQL that
will help you to authenticate your users.
I have added the roles table, not that they are referenced in the JDBC Realm connector ????
>
Now, its time to configure your web container, i.e.
Tomcat to use this database (in terms of JDBCRealm).
Make sure that tomcat services are stopped and then
open server.xml file in any ANSII compliant editor.
Search for any real tag (<Realm ... ) already placed
in your xml file. If there would be any, then you
should find under the <Engine> tag. Now place your own
<Realm> tag under the <Engine> tag.
It should be something like:
<Realm className="org.apache.catalina.realm.JDBCRealm"
debug="99"
driverName="org.gjt.mm.mysql.Driver"
connectionURL="jdbc:mysql://localhost:3306/tomcatusers"
connectionName="root"
connectionPassword=""
userTable="users"
userNameCol="user_name"
userCredCol="user_pass"
userRoleTable="user_roles"
roleNameCol="role_name"/>
Yup already done... now slightly modified
>
Plz double check "connectionName" and
"connectionPassword" attributes to match your own
user-name and passwords for your mySql db. This will
complete the whole process, just start your Tomcat
services again and see if that work. I hope it will
help you, plz must tell me about progress -:)
Raheel.
mysql -u tomcat -p
mysql> select a.user_name, b.role_name from users a, user_roles b
-> where a.user_name=b.user_name;
----------------------+
| user_name | role_name |
----------------------+
| daren | employee |
| tomcat | admin |
| tomcat | manager |
| tomcat | provider |
----------------------+
can you guess what happened????
IT DONT WORK :(