public bool RemoveConnection(long smtpSessionId, IPAddress remoteIPAddress)
{
if (remoteIPAddress == null)
{
throw new ArgumentNullException("remoteIPAddress");
}
MailboxDatabaseConnectionManager.ConnectionInfo connectionInfo = null;
if (!this.connections.TryGetValue(smtpSessionId, out connectionInfo))
{
return(false);
}
if (!remoteIPAddress.Equals(connectionInfo.RemoteIPAddress))
{
return(false);
}
bool active = connectionInfo.Active;
connectionInfo.Active = false;
bool result = false;
lock (this.syncObject)
{
result = this.RemoveConnectionTrackingItems(smtpSessionId);
if (active)
{
this.ActivateNextConnection();
}
}
return(result);
}
public void UpdateLastActivityTime(long smtpSessionId)
{
MailboxDatabaseConnectionManager.ConnectionInfo connectionInfo = null;
if (this.connections.TryGetValue(smtpSessionId, out connectionInfo))
{
connectionInfo.LastActivityTime = ExDateTime.UtcNow;
}
}
private bool RemoveConnectionTrackingItems(long smtpSessionId)
{
MailboxDatabaseConnectionManager.ConnectionInfo connectionInfo = null;
bool result = this.connections.TryRemove(smtpSessionId, out connectionInfo);
PooledEvent value = null;
bool flag = this.sessionEvents.TryRemove(smtpSessionId, out value);
if (flag)
{
this.eventPool.Release(value);
}
return(result);
}
public int GetThreadCount()
{
int num = 0;
foreach (long key in this.connections.Keys)
{
MailboxDatabaseConnectionManager.ConnectionInfo connectionInfo = null;
if (this.connections.TryGetValue(key, out connectionInfo) && connectionInfo.Active)
{
num++;
}
}
return(num);
}
private bool IsPending(IPAddress remoteIPAddress)
{
lock (this.syncObject)
{
MailboxDatabaseConnectionManager.ConnectionInfo connectionInfo = null;
foreach (long key in this.pendingConnections)
{
if (this.connections.TryGetValue(key, out connectionInfo) && !connectionInfo.Active && connectionInfo.RemoteIPAddress.Equals(remoteIPAddress))
{
return(true);
}
}
}
return(false);
}
public void ProcessStaleConnections(ExDateTime current, TimeSpan connectionMaxAge)
{
List <MailboxDatabaseConnectionManager.ConnectionInfo> list = new List <MailboxDatabaseConnectionManager.ConnectionInfo>();
foreach (long key in this.connections.Keys)
{
MailboxDatabaseConnectionManager.ConnectionInfo connectionInfo = null;
if (this.connections.TryGetValue(key, out connectionInfo) && ExDateTime.TimeDiff(current, connectionInfo.LastActivityTime).TotalMilliseconds > connectionMaxAge.TotalMilliseconds)
{
list.Add(connectionInfo);
}
}
foreach (MailboxDatabaseConnectionManager.ConnectionInfo connectionInfo2 in list)
{
this.RemoveConnection(connectionInfo2.SmtpSessionId, connectionInfo2.RemoteIPAddress);
}
}
private bool ActivateNextConnection()
{
if (this.pendingConnections.Count == 0)
{
return(false);
}
long key = 0L;
MailboxDatabaseConnectionManager.ConnectionInfo connectionInfo = null;
while (connectionInfo == null && this.pendingConnections.TryDequeue(out key))
{
if (this.connections.TryGetValue(key, out connectionInfo))
{
connectionInfo.Active = true;
this.SetSessionEvent(connectionInfo.SmtpSessionId);
}
}
return(true);
}
public XElement GetDiagnosticInfo(XElement parentElement)
{
XElement xelement = new XElement("Database");
xelement.Add(new XElement("id", this.mdbGuid));
int num = 0;
DeliveryThrottling.Instance.TryGetDatabaseHealth(this.mdbGuid, out num);
xelement.Add(new XElement("databaseHealthMeasure", num));
XElement xelement2 = new XElement("activeConnectionCount");
XElement xelement3 = new XElement("pendingConnectionCount");
xelement.Add(xelement2);
xelement.Add(xelement3);
XElement xelement4 = new XElement("Sessions");
xelement.Add(xelement4);
int num2 = 0;
foreach (long num3 in this.connections.Keys)
{
XElement xelement5 = new XElement("Session");
xelement4.Add(xelement5);
xelement5.Add(new XElement("id", num3));
MailboxDatabaseConnectionManager.ConnectionInfo connectionInfo = null;
if (this.connections.TryGetValue(num3, out connectionInfo))
{
if (connectionInfo.Active)
{
num2++;
}
xelement5.Add(new XElement("state", connectionInfo.Active ? "Active" : "Pending"));
}
}
xelement2.SetValue(num2);
xelement3.SetValue(this.pendingConnections.Count);
parentElement.Add(xelement);
return(parentElement);
}
public bool GetMdbHealthAndAddConnection(long smtpSessionId, IPAddress remoteIPAddress, out int mdbHealthMeasure, out List <KeyValuePair <string, double> > healthMonitorList, out int currentConnectionLimit)
{
mdbHealthMeasure = -1;
healthMonitorList = null;
currentConnectionLimit = -1;
if (remoteIPAddress == null)
{
throw new ArgumentNullException("remoteIPAddress");
}
lock (this.syncObject)
{
if (this.IsPending(remoteIPAddress))
{
return(false);
}
currentConnectionLimit = DeliveryThrottling.Instance.GetMDBThreadLimitAndHealth(this.mdbGuid, out mdbHealthMeasure, out healthMonitorList);
if (!this.sessionEvents.TryAdd(smtpSessionId, this.eventPool.Acquire()))
{
throw new InvalidOperationException("Unable to initialize synchronization events for the session.");
}
MailboxDatabaseConnectionManager.ConnectionInfo orAdd = this.connections.GetOrAdd(smtpSessionId, new MailboxDatabaseConnectionManager.ConnectionInfo(smtpSessionId, remoteIPAddress, ExDateTime.UtcNow, false));
if (this.connections.Keys.Count <= currentConnectionLimit && this.pendingConnections.Count == 0)
{
orAdd.Active = true;
this.SetSessionEvent(smtpSessionId);
}
else
{
this.pendingConnections.Enqueue(smtpSessionId);
if (this.connections.Keys.Count <= currentConnectionLimit)
{
this.ActivateNextConnection();
}
}
}
return(true);
}
