Selectively using H2 database for Grails in Datasource.groovy

gistfile1.groovy

dataSource_DSName {
	dbCreate = "update"
	pooled = true
	
	boolean useFastLocalH2DB = true
	if ( useFastLocalH2DB ) {
	        assert grails.util.Environment == grails.util.Environment.DEVELOPMENT.current, 'Only use H2 DB in Development mode!'
		driverClassName = "org.h2.Driver"
		username = "sa"
		password = ""
		url = "jdbc:h2:file:DSName;LOCK_TIMEOUT=10000"
	}
	else {
		url = 'jdbc:postgresql://192.168.1.1/DB'
		username = 'user'
		password = 'pass'
		driverClassName = 'org.postgresql.Driver'
		dialect = 'org.hibernate.dialect.PostgreSQLDialect'
		properties {
			maxActive = 10
		}
	}
}