/// <summary>
/// Releases expired host structures.
/// </summary>
public void TimerCallback()
{
int now = GenuineUtility.TickCount;
HostInformation hostInformation = null;
// the released host
ArrayList hostsToDelete = new ArrayList();
// the entries being deleted
ArrayList urisToDelete = new ArrayList();
lock (this.SyncRoot)
{
// through all registered hosts
foreach (DictionaryEntry entry in this._hashtable)
{
ArrayList hosts = (ArrayList)entry.Value;
for (int i = 0; i < hosts.Count;)
{
hostInformation = (HostInformation)hosts[i];
// if the time has run out
if (GenuineUtility.IsTimeoutExpired(hostInformation.ExpireTime, now) || hostInformation.IsDisposed)
{
// exclude the host
hosts.RemoveAt(i);
hostsToDelete.Add(hostInformation);
// check on entry excluding
if (hosts.Count <= 0)
{
urisToDelete.Add(entry.Key);
}
continue;
}
i++;
}
}
// it is very important to remove all references to the host before disposing it
foreach (string key in urisToDelete)
{
this._hashtable.Remove(key);
}
// dispose all hosts
foreach (HostInformation hostInformationExcluded in hostsToDelete)
{
// LOG:
BinaryLogWriter binaryLogWriter = GenuineLoggingServices.BinaryLogWriter;
if (binaryLogWriter != null && binaryLogWriter[LogCategory.HostInformation] > 0)
{
binaryLogWriter.WriteEvent(LogCategory.HostInformation, "KnownHosts.this[string]",
LogMessageType.HostInformationReferencesDisassociated, GenuineExceptions.Get_Debugging_GeneralWarning("The association between HostInformation and its URL or URI has been broken."),
null, hostInformationExcluded, null,
GenuineUtility.CurrentThreadId, Thread.CurrentThread.Name,
null, null, -1, 0, 0, 0, hostInformationExcluded.Uri, hostInformationExcluded.Url, null, null,
"The current HostInformation does not refer to \"{0}\" and \"{1}\" any longer.",
hostInformationExcluded.Uri == null ? string.Empty : hostInformationExcluded.Uri,
hostInformationExcluded.Url == null ? string.Empty : hostInformationExcluded.Url);
}
GenuineThreadPool.QueueUserWorkItem(new WaitCallback(this.ReleaseHostResources), new HostInformationAndReason(hostInformationExcluded, GenuineExceptions.Get_Channel_ClientDidNotReconnectWithinTimeOut(hostInformationExcluded.ToString())), true);
}
}
}