protected override void Execute()
{
var start = Environment.TickCount;
var random = new Random(TesterId);
do
{
// for simulating a broken lock to verify that this test does what is intended, use x as conditional on _lock calls
// var x = _testerId != random.Next(0, 1000);
_lock.Lock();
Interlocked.Increment(ref _counter);
try
{
Thread.Sleep(random.Next(1, 20)); // add some variability to iteration length so that threads aren't just running in lock step
Assert.AreEqual(1, _counter, @"Tester {0} entered lock while another tester has lock", TesterId);
FlagFailed(_counter != 1);
}
finally
{
Interlocked.Decrement(ref _counter);
_lock.Unlock();
}
} while (Environment.TickCount - start < TestLengthMs);
}
internal DataAccessContext(string mutexName, string databaseFilename)
{
if (!string.IsNullOrEmpty(mutexName))
{
_mutex = ExclusiveLock.CreateFileSystemLock(SqlCeDatabaseHelper <DicomStoreDataContext> .GetDatabaseFilePath(mutexName + databaseFilename));
_mutex.Lock();
}
try
{
// initialize a connection and transaction
_databaseFilename = databaseFilename;
_connection = CreateConnection();
_transaction = _connection.BeginTransaction(IsolationLevel.ReadCommitted);
_context = new DicomStoreDataContext(_connection);
//_context.Log = Console.Out;
}
catch
{
_mutex.Unlock();
_mutex.Dispose();
_mutex = null;
throw;
}
lock (_syncLock)
{
if (_staticConnection == null)
{
// This is done for performance reasons. It forces a connection to remain open while the
// the app domain is running, so that the database is kept in memory.
try
{
_staticConnection = CreateConnection();
}
catch (Exception ex)
{
Platform.Log(LogLevel.Debug, ex, "Failed to initialize static connection to data store database");
}
}
}
}