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

You can add multiple data sources in a single application, and access them in the services.

Firstly you need to add basic data sources in the resources.groovy.

first import BasicDataSource

import org.apache.commons.dbcp.BasicDataSource;

Then

    switch (grails.util.GrailsUtil.environment) {
    case "development":
        firstDataSource( BasicDataSource ) {
            driverClassName = "net.sourceforge.jtds.jdbc.Driver"
            url = "jdbc:jtds:sqlserver://localhost:1433;DatabaseName="
            username = "sa"
            password = "root"
            String SqlServerInstance = "SQLEXPRESS";
            url = url + ";" + SqlServerInstance;
        }
        break

    case "test":
        firstDataSource( BasicDataSource ) {

            driverClassName = "net.sourceforge.jtds.jdbc.Driver"
            url = "jdbc:jtds:sqlserver://localhost:1433;DatabaseName="
            username = "sa"
            password = "root"
            String SqlServerInstance = "SQLEXPRESS";
            url = url + ";" + SqlServerInstance;            }
        break;

}

In the same way you can add more data sources, above code will give you one more datasource to access other than the default one. I used switch to configure same data source for the different environments, same way more can be added.

and in the service it can be accessed in the services as:

BasicDataSource firstDataSource;
Connection con = firstDataSource.getConnection();

and then connection object can be used.

I think it should help