Grails 2 multiple dynamic datasources in services

Question

I am working on a Grails application where I must access several datasources. The datasources are defined in the default database (ie. they are stored there and I must make

Answer 1

I worked on similar project where the application has to retrieve list of datasources (connection strings) from the default database, and connect to each datasource and perform operations using quartz jobs.

I implemented it like, connect to each datasource within the application (not from DataSorce.groovy) and write SQL rather tahn HQL.

import groovy.sql.Sql

class SqlService{
    Sql getDbConnection(String connectionString, String dbUser, String dbPassword){
        def sql = Sql.newInstance(connectionString, dbUser, dbPassword, "driver_class")
        return sql
    }
}

Get sql connection from the above code and execute SQL queries using sql.execute "SQL STATEMENT" and close the sql connection. Here is the Sql class documentation.