Dapper and OrmLite IDBConnectionFactory in ServiceStack - oracle

Question

I am impressed with the speed that I can create services using ServiceStack, but for a while now I have not been able to grasp the concept of using OrmLite and Dapper simultaneously in my project. I am registering a IDbConnectionFactory like this in my Global.asax.cs
public override void Configure(Funq.Container container)
{
var dbConnectionFactory =
new OrmLiteConnectionFactory(ConfigUtils.GetConnectionString("test"), true, OracleDialect.Provider);
container.Register<IDbConnectionFactory>(dbConnectionFactory);
container.Register<ISubscriberRepository>(
c => new SubscriberRepository(c.Resolve<IDbConnectionFactory>()));
}
That works fine for OrmLite but it is a not as simple for Dapper. Maybe I am just thinking this should be more convenient than it really is. In my repository I am trying to call a Oracle stored procedure. That is my main reason for using Dapper and not OrmLite for this process. This is my repository:
public class SubscriberRepository : ISubscriberRepository {
public SubscriberRepository(IDbConnectionFactory conn) {
_conn = conn;
}
public IDbConnectionFactory _conn { get; set; }
public SubscriberResponse GetSubscriber(SubscriberRequest request) {
using (IDbConnection db = _conn.OpenDbConnection()) {
var resp = new SubscriberResponse();
List<Subscriber> s = db.Select<Subscriber>(
q => q.Subscribernum == request.Subscribernum &&
q.Personcode == request.Personcode &&
q.Clientcode == request.Clientcode);
resp.Subscriber = s[0];
return resp;
}
}
public SubscribersResponse SearchSubscribers(SubscribersRequest request) {
var response = new SubscribersResponse();
using (var cnn = new OracleConnection("this is my conneciton string")) {
cnn.Open();
var p = new OracleDynamicParameters();
p.Add("#username", "uname", OracleDbType.Varchar2);
p.Add("#Subscribernum", "", OracleDbType.Varchar2);
p.Add("#Personcode", "", OracleDbType.Varchar2);
p.Add("#Lastname", "TEST", OracleDbType.Varchar2);
p.Add("#Firstname", "HA", OracleDbType.Varchar2);
p.Add("#Mi", "", OracleDbType.Varchar2);
p.Add("#Dob", null, OracleDbType.Date);
p.Add("#MaxResults", 200, OracleDbType.Int32);
p.Add("#Curs", dbType: OracleDbType.RefCursor, direction: ParameterDirection.Output);
using (SqlMapper.GridReader multi = cnn.QueryMultiple("SEARCHSUBSCRIBER", p,
commandType: CommandType.StoredProcedure)) {
List<SearchSubscriberResults> r = multi.Read<SearchSubscriberResults>().ToList();
response.Results = r;
}
}
return response;
}
}
This works. But it isn't really using the IDbConnectionFactory at all in the SearchSubscribers function. I don't want to look at connection strings in my repository really since I could really register them all up front in the service itself.
I tried to use ServiceStack.Razor.Dapper.SqlMapper.QueryMultiple() but that doesn't work because I can't map the Oracle sys_refcursor back to anything without using the OracleDynamicParamaters workaround.
So, my question is can I create a connection for Dapper from the IDBConnectionFactory?
Thanks!

Answer 1

I haven't used Oracle in .NET (not since my Perl days), but OracleConnection implements the interface IDbConnection.
You should be able to cast the db connection you grab from:
IDbConnection db = _conn.OpenDbConnection()
and cast it to OracleConnection (assuming the OrmLite provider creates that same instance).
var cnn = db as OracleConnection;
... then you can try calling all that Oracle-specific stuff, like OracleDynamicParameters.
You may have to set this in AppHost.Configure() or somewhere:
OrmLiteConfig.DialectProvider = new OracleOrmLiteDialectProvider();