On Mon, Apr 28, 2025 at 1:07 PM Mark Thomas <ma...@apache.org> wrote:
> > On 28/04/2025 16:35, Christopher Schultz wrote: > > > ABT, > > > > > > On 4/28/25 9:05 AM, A Name wrote: > > >> We are looking at adding a second instance of our app (named > > >> differently -- > > >> myappA and myappB) to our Tomcat 9. We currently have the app > > >> installed at > > >> a number of customer locations, we are looking at dropping 1 app > > >> > > >> Currently, our database connections are established inside the GLOBAL > > >> web.xml in /conf/web.xml - and have been forever. This was a design > > >> decision made long ago - that way the app doesn't have a separate > > >> configuration for each location - it is the same app WAR file, and the > > >> connections are established at the server. > > >> > > >> Our customer doesn't want any code changes - is there a way to have > some > > >> sort of conditional statements in the web.xml? > > > > > > No, but maybe you don't need them. > > > > > > JDBC configurations are never stored in web.xml, regardless of > location. > > > So maybe you are talking about <datasource-ref> or something like that? > > > > > > Unless your application is collecting some configuration from web.xml > > > and then making its own connections or establish its own JDBC data > > > source, your configuration should be in META-INF/context.xml in the > web > > > application. If you don't want to bundle that with your web > application, > > > you can deploy a site-specific configuration file in Tomcat's conf/ > > > [Engine]/[Host]/[appname].xml file which contains this configuration. > > > Then your web.xml only has to reference the name of the data-source in > > > datasource-ref which can be static. The local configuration file gives > > > the details, and web.xml references them. > > > > > > Will this approach not work for you? > > > > > >> Or if we set it up so Tomcat is hosting 2 sites (www.sitea.com/myapp > and > > >> www.siteb.com/myapp) and have the global web.xml with different > settings > > >> based on host/site? > > > > > > As Mark says, "global is global". > > > Thinking about this some more and to expand on Chris's excellent > suggestion. > > > > You can define multiple JDBC connection pools in conf/web.xml and then > > use <ResourceLink /> in the context.xml > > > > > https://tomcat.apache.org/tomcat-11.0-doc/config/globalresources.html#Resource_Links > <https://tomcat.apache.org/tomcat-11.0-doc/config/globalresources.html#Resource_Links> > > > > There are also Host level configuration files for context.xml and > > web.xml that apply to all applications within that Host. > > > > HTH, > > > > Mark > Right now - in our conf/web.xml we have: <context-param> <param-name>type</parm-name> <param-value>SIMPLE</param-value> </context-param> <context-param> <param-name>datasource</parm-name> <param-value>mydatasource</param-value> </context-param> <context-param> <param-name>driver</parm-name> <param-value>oracle.jdbc.OracleDriver</param-value> </context-param> <context-param> <param-name>url</parm-name> <param-value>jdbc:oracle:thin:@dbserver:port:sid</param-value> </context-param> <context-param> <param-name>username</parm-name> <param-value>mydbuser</param-value> </context-param> <context-param> <param-name>password</parm-name> <param-value>mydbuserpassword</param-value> </context-param> I'm not "fluent" in tomcat - this is the configuration that has always been there in the conf/web.xml. But I see those are Context-Params - so maybe they'd be appropriate in the conf/Context.xml? In the new world, I'd need 2 sets of those parameters (basically with the same names for the app to find them). one pointing to dbserver-site1 and one pointing to dbserver-site2. Basically I'm looking for ideas that would not involve App code changes if possible. I can change the XML configs in the conf directory without issue... but for program reasons, at this time, the app code (or the META-INF/xml files) are not supposed to be touched on considering this adventure. I think your host/site context.xml file ideas are interesting. Would I be able to take the context info that I put here out of web.xml and put it in the conf/Catalina/localhost/site1app.xml and put another copy in conf/Catalina/localhost/site2app.xml with the different url/username/password? That would be an ideal and simple answer. ABT > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
