gistfile1.java

// This in BootStrap.groovy

class BootStrap {
  def dataService

  def init = { servletContext ->
    dataService.initBeans()
  }
  def destroy = {
  }
}

// Then this is the DataService

class DataService implements ApplicationContextAware {
  ApplicationContext  applicationContext

  boolean transactional = false

  // Get an Sql instance for a DataSource
  def getSql( species, version ) {
    Sql.newInstance( applicationContext.getBean( "${species}_${version}_db" ) )
  }

  // Register all BasicDataSource beans
  def initBeans() {
    Species.list().each { species ->
      species.versions.each { version ->
        registerBean( species, version )
      }
    }
  }

  // Register a single bean
  def registerBean( Species species, SpeciesVersion version ) {
    def bb = new grails.spring.BeanBuilder()
    bb.beans {
      "${species.internalName}_${version.name}_db"( BasicDataSource ) {
        driverClassName = "com.mysql.jdbc.Driver"
        url = "jdbc:mysql://localhost/${species.dbName}_${version.name}"
        username = "XXXXXXXXX"
        password = "XXXXXXXXX"
      }
    }
    bb.registerBeans( applicationContext )
  }
}