I just test PetaPoco Transaction in a multithread way...
I have a simple test case :
-- Simple value object call it MediaDevice -- Insert a record an update it for 1000 times
void TransactionThread(Object object)
{
Database db = (Database) object;
for(int i= 0; i < 1000;i++)
{
Transaction transaction = db.GetTransaction();
MediaDevice device = new MediaDevice();
device.Name = "Name";
device.Brand = "Brand";
db.Insert(device);
device.Name = "Name_Updated";
device.Brand = "Brand_Updated";
db.Update(device);
transaction.Complete();
}
long count = db.ExecuteScalar<long>("SELECT Count(*) FROM MediaDevices");
Console.WriteLine("Number of all records:" + count);
}
And I call this in two threads like this:[ Single Database object for both threads]
void TransactionTest()
{
Database db = GetDatabase();
Thread tThread1 = ... // thread for TransactionTest()
Thread tThread2 = ... // thread for TransactionTest()
tThread1.Start(db); // pass Database to TransactionTest()
tThread2.Start(db); // pass same Database to TransactionTest()
}
I get Null error or sometimes Object disposed error for Database..
But when i supply two Database instance,
void TransactionTest()
{
Database db = GetDatabase();
Database db2 = GetDatabase();
Thread tThread1 = ... // thread for TransactionTest()
Thread tThread2 = ... // thread for TransactionTest()
tThread1.Start(db); // pass Database instance db to TransactionTest()
tThread2.Start(db2); // pass Database intance db2 to TransactionTest()
}
Everthing is OK...
Well When I check PetaPoco source code at transaction I see that at transaction.Complete
public virtual void Complete()
{
_db.CompleteTransaction();
_db = null;
}
My question is that to able to use transaction from multiple threads Do I have to use new copy of Database object? Or what am i doing wrong?
And to make it thread safe do i have to open and close NEW database at every data update-query?