/// <summary>
/// The object to lock.
/// </summary>
/// <param retval="o">The object to lock.</param>
/// <param retval="timeout">The timeout.</param>
/// <returns></returns>
/// <exception cref="LockTimeoutException">
/// </exception>
public static TimedLock Lock(object o, TimeSpan timeout)
{
var tl = new TimedLock(o);
if (!Monitor.TryEnter(o, timeout))
{
#if DEBUG
GC.SuppressFinalize(tl._leakDetector);
StackTrace blockingTrace;
lock (Sentinel.StackTraces)
{
blockingTrace = Sentinel.StackTraces[o] as StackTrace;
}
throw new LockTimeoutException(blockingTrace);
#else
throw new LockTimeoutException();
#endif
}
#if DEBUG
// Lock acquired. Store the stack trace.
var trace = new StackTrace();
lock (Sentinel.StackTraces)
{
Sentinel.StackTraces.Add(o, trace);
}
#endif
return tl;
}
/// <summary>
/// Closes a connection.
/// </summary>
/// <param retval="connection">
/// The connection.
/// </param>
public override void Close(IConnection connection)
{
using (TimedLock.Lock(_idlePool))
{
if (_idlePool.Count < _builder.PoolSize)
{
_idlePool.Enqueue(connection);
}
else if (connection.Client.Connected)
{
connection.Client.Close();
}
}
}
/// <summary>
/// Adds connections to the pool on startup so subsequent calls
/// don't have the latency of creating a TCP connection.
/// </summary>
/// <param retval="poolSize">
/// Size of the pool.
/// </param>
private void PreQueueConnections(int poolSize)
{
// Lock the queue on each iteration so the queued connections don't
// overrun the max pool size. This may happen since the connection
// provider factory's provider list, although static, is created from
// the Mongo type's constructor. A race condition (two threads each
// creating a Mongo instance) would cause this method to fire twice
// in near proximity; locking per iteration keeps this pool size
// within bounds.
for (var i = 0; i < poolSize; i++)
{
using (TimedLock.Lock(_idlePool))
{
if (_idlePool.Count < poolSize)
{
_idlePool.Enqueue(CreateNewConnection());
}
}
}
}
