private void BrowseMessagesWorker(BlockingCollection <WsMessage> output, IBrowseFilter filter, CancellationToken ct, MQQueue queue, byte[] startingPointMessageId)
{
var browseOption = MQC.MQGMO_BROWSE_FIRST;
if (startingPointMessageId != null)
{
if (SetBrowseCursorAtMessageId(queue, startingPointMessageId))
{
browseOption = MQC.MQGMO_BROWSE_NEXT;
}
}
var getMsgOpts = new MQGetMessageOptions()
{
Options = MQC.MQGMO_FAIL_IF_QUIESCING | browseOption
};
try
{
while (!ct.IsCancellationRequested)
{
var msg = new MQMessage();
queue.Get(msg, getMsgOpts);
var localMsg = new WsMessage(msg, this);
if (filter == null || filter.IsMatch(localMsg))
{
output.Add(localMsg, ct);
}
else
{
output.Add(null, ct);
}
getMsgOpts.Options = MQC.MQGMO_FAIL_IF_QUIESCING | MQC.MQGMO_BROWSE_NEXT;
}
}
catch (OperationCanceledException)
{
}
catch (MQException ex)
{
if (ex.ReasonCode != MQC.MQRC_NO_MSG_AVAILABLE)
{
throw;
}
}
}
public IEnumerable <IMessage> BrowseMessages(int numberOfMessages, CancellationToken ct, byte[] startingPointMessageId = null, IBrowseFilter filter = null, IProgress <int> progress = null)
{
MQQueue ibmQueue;
var browseOption = MQC.MQGMO_BROWSE_FIRST;
try
{
ibmQueue = OpenQueueCore(OpenQueueMode.ForBrowse);
if (startingPointMessageId != null)
{
if (SetBrowseCursorAtMessageId(ibmQueue, startingPointMessageId))
{
browseOption = MQC.MQGMO_BROWSE_NEXT;
}
}
}
catch (MQException ibmEx)
{
throw ibmEx.ToMqException(AddExtraInfoToError);
}
int count = 0;
var getMsgOpts = new MQGetMessageOptions()
{
Options = MQC.MQGMO_FAIL_IF_QUIESCING | browseOption
};
try
{
while (!ct.IsCancellationRequested)
{
var msg = new MQMessage();
try
{
ibmQueue.Get(msg, getMsgOpts);
}
catch (MQException ibmEx)
{
if (ibmEx.ReasonCode == MQC.MQRC_NO_MSG_AVAILABLE)
{
break;
}
throw ibmEx.ToMqException(AddExtraInfoToError);
}
count++;
var localMsg = new WsMessage(msg, this);
if (filter == null || filter.IsMatch(localMsg))
{
progress?.Report(count);
localMsg.Index = count;
yield return(localMsg);
}
numberOfMessages--;
if (numberOfMessages == 0)
{
break;
}
getMsgOpts.Options = MQC.MQGMO_FAIL_IF_QUIESCING | MQC.MQGMO_BROWSE_NEXT;
}
}
finally
{
ibmQueue?.Close();
}
}