public IDbConnectionSession BeginSession(RequestContext context)
{
if (SessionStore.LocalSession != null)
{
throw new SmartSqlException("SmartSqlMapper could not invoke BeginSession(). A LocalSession is already existed.");
}
var dataSource = DataSourceFilter.Elect(context);
var dbSession = SessionStore.CreateDbSession(dataSource);
dbSession.Begin();
return(dbSession);
}