public void EndSend(IAsyncResult asyncResult)
{
var smtpResult = asyncResult as SmtpWorkerAsyncResult;
if (smtpResult == null)
{
throw new ArgumentException("IAsyncResult is of the wrong type.", "asyncResult");
}
SmtpWorkerAsyncResult.End(smtpResult);
}
public IAsyncResult BeginSend(MailMessage message, AsyncCallback callback, object state)
{
var asyncResult = new SmtpWorkerAsyncResult(message, callback, state);
lock (queueLock)
{
// lock keeps queue count and active client count in sync
messageQueue.Enqueue(asyncResult);
EnsureWorker();
}
return asyncResult;
}
public IAsyncResult BeginSend(MailMessage message, AsyncCallback callback, object state)
{
var asyncResult = new SmtpWorkerAsyncResult(message, callback, state);
lock (queueLock)
{
// lock keeps queue count and active client count in sync
messageQueue.Enqueue(asyncResult);
EnsureWorker();
}
return(asyncResult);
}
private void SendCompleted(object sender, AsyncCompletedEventArgs e)
{
SmtpWorkerAsyncResult completedAsyncResult = (SmtpWorkerAsyncResult)e.UserState;
if (e.Error != null)
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "SendCompleted Exception: {0}", e.Error));
}
completedAsyncResult.Complete(e.Error, false);
completedAsyncResult.Dispose();
// Use the completed thread to check for any new messages in queue
var smtpClient = (SmtpClient)sender;
ProcessQueue(smtpClient);
}
public IAsyncResult BeginSend(MailMessage message, AsyncCallback callback, object state)
{
var asyncResult = new SmtpWorkerAsyncResult(message, callback, state);
SmtpClient newWorker = null;
lock (queueLock)
{
// lock keeps queue count and active client count in sync
messageQueue.Enqueue(asyncResult);
newWorker = CheckNewWorker();
}
if (newWorker != null)
{
ProcessQueue(newWorker);
}
return asyncResult;
}
public IAsyncResult BeginSend(MailMessage message, AsyncCallback callback, object state)
{
var asyncResult = new SmtpWorkerAsyncResult(message, callback, state);
SmtpClient newWorker = null;
lock (queueLock)
{
// lock keeps queue count and active client count in sync
messageQueue.Enqueue(asyncResult);
newWorker = CheckNewWorker();
}
if (newWorker != null)
{
ProcessQueue(newWorker);
}
return(asyncResult);
}
internal static void End(SmtpWorkerAsyncResult asyncResult)
{
// This method assumes that only 1 thread calls EndInvoke
// for this object
if (!asyncResult.IsCompleted)
{
// If the operation isn't done, wait for it
asyncResult.AsyncWaitHandle.WaitOne();
asyncResult.AsyncWaitHandle.Close();
// Allow early GC
asyncResult.m_AsyncWaitHandle = null;
}
// Operation is done: if an exception occured, throw it
if (asyncResult.m_exception != null)
{
throw asyncResult.m_exception;
}
}
private void ProcessQueue(SmtpClient clientToUse)
{
SmtpWorkerAsyncResult asyncResultToProcess = null;
lock (queueLock)
{
// lock keeps queue count and active client count in sync
if (messageQueue.Count > 0)
{
asyncResultToProcess = messageQueue.Dequeue();
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:mm':'ss.ffffff}: ProcessQueue, active count = {1}, queue length = {2}", DateTimeOffset.Now, activeSmtpClients.Count, messageQueue.Count));
}
else
{
// Nothing to process; shut down the SmtpClient
activeSmtpClients.Remove(clientToUse);
}
};
if (asyncResultToProcess != null)
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:mm':'ss.ffffff}: Before SendAsync, active count = {1}, queue length = {2}", DateTimeOffset.Now, activeSmtpClients.Count, messageQueue.Count));
Exception exception = null;
try
{
clientToUse.SendAsync(asyncResultToProcess.Message, asyncResultToProcess);
}
catch (Exception ex)
{
exception = ex;
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "SendAsync Exception: {0}", exception));
}
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:mm':'ss.ffffff}: After SendAsync, active count = {1}, queue length = {2}", DateTimeOffset.Now, activeSmtpClients.Count, messageQueue.Count));
if (exception != null)
{
asyncResultToProcess.Complete(exception, true);
}
}
else
{
TryDisposeSmtpClient(clientToUse);
}
}
private void ThreadStart()
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:mm':'ss.ffffff}: ThreadStart, pool count = {1}, queue length = {2}", DateTimeOffset.Now, pool.smtpWorkerPool.Count, pool.messageQueue.Count));
SmtpClient smtpClient = null;
try
{
smtpClient = new SmtpClient();
Stopwatch idleTimeout = new Stopwatch();
bool running = true;
while (running)
{
SmtpWorkerAsyncResult asyncResultToProcess = null;
lock (pool.queueLock)
{
// lock keeps queue count and active client count in sync
if (pool.messageQueue.Count > 0)
{
asyncResultToProcess = pool.messageQueue.Dequeue();
}
else
{
if (idleTimeout.IsRunning && idleTimeout.ElapsedMilliseconds > idleTimeoutMilliseconds)
{
pool.smtpWorkerPool.Remove(this);
running = false;
}
}
}
if (asyncResultToProcess != null)
{
if (idleTimeout.IsRunning)
{
isIdle = false;
idleTimeout.Reset();
}
var message = asyncResultToProcess.Message;
Exception exception = null;
try
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:mm':'ss.ffffff}: Before Send, pool count = {1}, queue length = {2}", DateTimeOffset.Now, pool.smtpWorkerPool.Count, pool.messageQueue.Count));
smtpClient.Send(message);
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:mm':'ss.ffffff}: After Send, pool count = {1}, queue length = {2}", DateTimeOffset.Now, pool.smtpWorkerPool.Count, pool.messageQueue.Count));
}
catch (Exception ex)
{
exception = ex;
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "Error sending: {0}", exception));
}
asyncResultToProcess.Complete(exception, false);
}
else
{
if (!idleTimeout.IsRunning)
{
isIdle = true;
idleTimeout.Start();
}
}
Thread.Sleep(0);
}
}
catch (Exception ex)
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:mm':'ss.ffffff}: Exception: {1}", DateTimeOffset.Now, ex));
}
finally
{
if (smtpClient != null)
{
TryDisposeSmtpClient(smtpClient);
}
}
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:mm':'ss.ffffff}: ThreadEnding, pool count = {1}, queue length = {2}", DateTimeOffset.Now, pool.smtpWorkerPool.Count, pool.messageQueue.Count));
}
internal static void End(SmtpWorkerAsyncResult asyncResult)
{
// This method assumes that only 1 thread calls EndInvoke
// for this object
if (!asyncResult.IsCompleted)
{
// If the operation isn't done, wait for it
asyncResult.AsyncWaitHandle.WaitOne();
asyncResult.AsyncWaitHandle.Close();
// Allow early GC
asyncResult.m_AsyncWaitHandle = null;
}
// Operation is done: if an exception occured, throw it
if (asyncResult.m_exception != null)
{
throw asyncResult.m_exception;
}
}
