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Tomcat 5.0 Database Change

Posted on 2010-11-23
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Last Modified: 2012-08-14
Hi,

I need to change my database connection.  My current configuration is:

<Host name="www.website.com" appBase="webapps">
        <Alias>*.www.website.com</Alias>
        <Alias>website.com</Alias>
<Context path="" docBase="/home/www/www.website.com/web" debug="1" reloadable="true" crossContext="false">
            <Resource name="jdbc/trampoline" auth="Container" type="javax.sql.DataSource" />
                    <ResourceParams name="jdbc/trampoline">
                    <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>30</value>
                    </parameter>
                    <parameter>
                            <name>maxWait</name>
                            <value>10000</value>
                    </parameter>
                    <parameter>
                            <name>username</name>
                            <value>invoke</value>
                    </parameter>
                    <parameter>
                            <name>password</name>
                            <value>$12_o</value>
                    </parameter>

                    <parameter>
                            <name>driverClassName</name>
                            <value>com.mysql.jdbc.Driver</value>
                    </parameter>
                    <parameter>
                            <name>url</name>
                            <value>jdbc:mysql://localhost:3306/databaseA?autoReconnect=true</value>
                    </parameter>

                    </ResourceParams>
        </Context>
</Host>


Can I simply change the line:
<value>jdbc:mysql://localhost:3306/databaseA?autoReconnect=true</value>

to:
<value>jdbc:mysql://localhost:3306/databaseB?autoReconnect=true</value>

Or do I need to edit additional file?

Thank you! ~Wendi
0
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Question by:FrostyGirl
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7 Comments
 
LVL 27

Expert Comment

by:mrcoffee365
ID: 34199606
Yes, you can change the connection string to go to a different database.  Then all your code will go to the new database connection, and you will not be accessing the databaseA.

It's easy to try -- is there something else you're concerned about?  Or did you try it and it didn't work?
0
 

Author Comment

by:FrostyGirl
ID: 34200116
Tried it and it didn't work.
0
 

Author Comment

by:FrostyGirl
ID: 34200119
It's still using DB A
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LVL 10

Expert Comment

by:Hegemon
ID: 34200527
It looks correct - make sure you have restarted the server.
0
 
LVL 27

Accepted Solution

by:
mrcoffee365 earned 500 total points
ID: 34200853
After making sure that you have re-started your server --  changes to web.xml do not occur unless the webapp is reloaded -- then you need to post the exception you're getting.

If your code has the url for the database hard-coded somewhere, then it will use that regardless of what you write into this context parameter.  The parameters have to be used in the code -- nothing in the webapp makes any use of them.
0
 
LVL 13

Expert Comment

by:LinuxGuru
ID: 34201656
As mentioned above you need to restart the tomcat. First stop the tomcat using the script "shutdown.sh" and start using the "startup.sh" in your tomcat's bin directory.

Cheers!
0
 
LVL 3

Expert Comment

by:eicheled
ID: 34321940
And make sure that the username and password are correct for databaseB :-)
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