private void ReadEventInternal(IPSEventQueue queue)
{
List <PSEvent> eventList = null;
if (Wait.IsPresent)
{
if (queue.HasEvents == false)
{
// need to launch new thread here -- blocking the pipeline thread with a wait
// deadlocks something, but joining does not - not sure what's going on here, yet.
var t = new Thread(WaitForEventOrBreak);
t.IsBackground = true;
t.Start(queue);
while (t.IsAlive)
{
// process messages
Application.DoEvents();
Thread.Sleep(100);
}
t.Join();
}
}
eventList = queue.DequeueAll(this.NoFlush);
if (eventList != null)
{
WriteObject(eventList, true);
}
}
/// <summary>
/// Worker thread for listening to spool
/// </summary>
private static void WaitForEventOrBreak(object state)
{
IPSEventQueue queue = (IPSEventQueue)state;
PSQueueHelper helper = PSQueueHelper.Instance;
while (queue.HasEvents == false && (!helper.CtrlCHit))
{
// com/sendmessage pumping
Thread.CurrentThread.Join(100);
}
}
protected override void EndProcessing()
{
Dump("Begin");
IPSEventQueue queue = GetQueue();
try
{
ReadEventInternal(queue);
}
catch (Exception ex)
{
Trace.WriteLine(ex.ToString(), "GetEvent Error");
var error = new ErrorRecord(ex, "EventReadFailed", ErrorCategory.ReadError, null);
ThrowTerminatingError(error);
}
Dump("End");
}
protected override void EndProcessing()
{
IEnumerable queueNames = (this.QueueName ?? (IEnumerable)PSQueueHelper.Instance.QueueNames);
foreach (string queueName in queueNames)
{
IPSEventQueue queue = PSQueueHelper.Instance.GetEventQueue(queueName);
if (queue.Count > 0 || ShowEmpty.IsPresent)
{
PSObject obj = new PSObject();
obj.Properties.Add(new PSNoteProperty("QueueName", queueName));
obj.Properties.Add(new PSNoteProperty("Count", queue.Count));
//obj.Properties.Add(new PSNoteProperty("Last", queueName));
WriteObject(obj);
}
else
{
WriteVerbose("Skipping empty queue: " + queueName);
}
}
}
protected override void BeginProcessing()
{
m_queue = (this.QueueName == null) ?
PSQueueHelper.Instance.DefaultQueue
: PSQueueHelper.Instance.GetEventQueue(this.QueueName);
}