Configuración

dataSource {
  dbCreate = "create-drop"
  url = "jdbc:mysql://localhost/DATABASE_NOMBRE"
  driverClassName = "com.mysql.jdbc.Driver"
  username = "USERNAME"
  password = "PASSWORD"
  pooled = true
  properties {
    maxActive = -1
    minEvictableIdleTimeMillis=1800000
    timeBetweenEvictionRunsMillis=1800000
    numTestsPerEvictionRun=3
    testOnBorrow=true
    testWhileIdle=true
    testOnReturn=true
    validationQuery="SELECT 1"
  }
}