Yikes. With a big setup like that, I'm surprised there's no automagically configured clustered setup where the DB engine is handling all that load sharing. I give up... ;)
----- Original Message ----- From: "Johan Wasserman" <[EMAIL PROTECTED]> To: "Struts Users Mailing List" <[EMAIL PROTECTED]> Sent: Wednesday, March 26, 2003 9:30 AM Subject: RE: [newbie]dbcp pools with Struts... the saga continues Oh, it get much more complicated than that, I have multiple physical db servers, databases are created round-robin style on the different servers, a new dbserver can be added and then databases are created there until the load is equal to the others. When the load on one server gets too high, a database can be moved to another server, and the companies web app gets is informed of the move, that's where the .properties file should do its work. -----Original Message----- From: Ian Hunter [mailto:[EMAIL PROTECTED] Sent: 26 March 2003 16:19 To: Struts Users Mailing List Subject: Re: [newbie]dbcp pools with Struts... the saga continues Maybe have them share a database connection, but use different databases within that database server. I'm not that familiar with Postgres, but here's the idea as applied to SQL Server (Oracle would be similar) 1) They subscribe, and your app copies everything it needs to get running. A new database is created called "acme" (where do you store the customer's name, "acme" in this case? I'm assuming it's available to the app somehow). 2) In your code to get an actual connection, you get the datasource via JNDI, then the first statement executed is "use acmeDB" 3) Proceed as before, and now they are using their own database. Another option would be doing multitenancy in the tables, so everyone shares the same database (there are advantages and disadvantages to this; you could have *some* groups with access to other groups' data, if that's appropriate) Going the other direction philosophically, yet another option would be creating a new DB login for each customer, and the DB specifies which database they have access to (e.g. "acme" login has default database = "acmeDB" and "widgetco" login has default database = "widgetcoDB"). You would have to set the username and password in the datasource before getting the connections, and I'm not sure exactly how/if that would work, but it would imply another layer of "security" in a way... ----- Original Message ----- From: "Johan Wasserman" <[EMAIL PROTECTED]> To: "Struts Users Mailing List" <[EMAIL PROTECTED]> Sent: Wednesday, March 26, 2003 9:01 AM Subject: RE: [newbie]dbcp pools with Struts... the saga continues Problem is, as soon as a new company subscribes, I have automated processes to copy the app from [example] http://myweb.com/template to http://myweb.com/acme and create the relevant .propperties and .xml files, etc... I even automate the creation of the new "acme" database from a postgres template database. I can automate the addition of a datasource in server.xml, but then the server needs to restart and I cannot automate the addition of another constant in my Constants class. -----Original Message----- From: Ian Hunter [mailto:[EMAIL PROTECTED] Sent: 26 March 2003 15:48 To: Struts Users Mailing List Subject: Re: [newbie]dbcp pools with Struts... the saga continues You should be able to set up multiple database connections in server.xml; I don't see why there's a problem. As long as you're using unique names for the resources, you should be OK. BTW, a "standard" for naming such things would be "com.mycompany.myapp.Constants.DATABASE_KEY" -- not likely to ever step on someone else's resource name that way. I have a Tomcat instance with two separate dbcp pools set up now, where one application uses one of them, the another uses the other, and everything is happy. ----- Original Message ----- From: "Johan Wasserman" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, March 26, 2003 3:40 AM Subject: [newbie]dbcp pools with Struts... the saga continues Hi, This might me out of context, but please be patient with me. I am now building a DAO (thanks for putting me on the right track Mr. Graham) and I'm trying to find a way for the DAO to establish it's own connection to the database pool/s created by the ActionServlet. Again, I must stress that I am very new to struts and dbcp. I would prefer not to pre-established connection (using getConnection) and passing that to the DAO, and I believe the method I'm trying to use below should be helpful in a lot of other circumstances as well. I know that would be very easy if my pool/s where configured in server.xml and then would be accessable through initialContext. But being configured in strust-config (servlet context) I cannot set up a <resource-ref> for it in web.xml. (in servlet and not container context, because multiple companies share the same web-server, but have their own app connecting to their unique db instance). --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
