messengerapi.Broker/code/MessengerBroker/Factories/BrokerDbContextFactory.cs

using MessengerApi.Configuration.Model.Persistence;
using MessengerBroker.Configuration.Model;
using MessengerBroker.Db;
using MessengerBroker.Db.Sql;

namespace MessengerBroker.Factories
{
    public class BrokerDbContextFactory
    {
        private readonly BrokerConfiguration configuration;

        public BrokerDbContextFactory(BrokerConfiguration configuration)
        {
            this.configuration = configuration;
        }

        public BrokerDbContext CreateDbContext()
        {
            if(this.configuration.BrokerPersistenceConfiguration.PersistenceType == MessengerApi.Configuration.Enums.PersistenceTypes.Sql)
            {
                return new BrokerSqlDbContext((this.configuration.BrokerPersistenceConfiguration as SqlPersistenceConfiguration).ConnectionString);
            }

            throw new NotImplementedException();
        }
    }
}