配置Grails应用程序以在Heroku上使用ClearDB / MySQL

Question

I have a Grails (2.0.0) application and have successfully:

1. Deployed it to Heroku using the H2 database
2. Configured it to use a local MySQL database
3. Added the ClearDB addon

However, I get a HTTP 503 error when I try to run the application while attempting to use the ClearDB instance.

Here are snippets from DataSource.groovy (a combination of tricks from various posts, including this tutorial from ClearDB and this help page from Heroku )

dataSource {
  pooled = true
  driverClassName = "com.mysql.jdbc.Driver"
}

...

production {        
  dataSource {
    dbCreate = "update"
      uri = new URI(System.env.DATABASE_URL?:"mysql://99784530f103:934c2a0@server.cleardb.com/heroku_0ac7f6f45fa34")
      url = "jdbc:mysql://"+uri.host+uri.path
      username = uri.userInfo.split(":")[0]
      password = uri.userInfo.split(":")[1]
    }
}

where the MySQL URL string comes from the DATABASE_URL environment variable.

Any advice?

Answer 1

Figures... Soon after I post the question, I figured it out. Change "DATABASE_URL" to "CLEARDB_DATABASE_URL_A". At least this is now an official Grails2.0/Heroku/ClearDB answer!