public void InitializeChannels(ReceiveLinkDescription[] receiveLinks)
{
InitializeConnectionAndSession();
foreach (var link in receiveLinks)
{
// Some sanity checks first
if (link.Type != LinkType.Receive) continue;
if (!this.partitions.Contains(link.PartitionId.ToString()))
{
throw new Exception(string.Format(
"Partition '{0}' does not exist in this event hub and cannot be initialized.",
link.PartitionId));
}
string partitionAddress = string.Format(
"{0}/ConsumerGroups/{1}/Partitions/{2}",
this.settings.EventHubName,
link.ConsumerGroup,
link.PartitionId);
var filters = BuildFilter(link);
var amqpLink = new ReceiverLink(
this.amqpSession,
string.Format("receiver-{0}-{1}", this.Name, link.PartitionId),
new Source()
{
Address = partitionAddress,
FilterSet = filters
},
null);
this.channels.Add(link.Name, new ReceiveChannel()
{
Connection = amqpConnection,
Session = amqpSession,
Link = amqpLink,
Name = link.Name,
PartitionId = link.PartitionId.ToString()
});
}
}
protected Map BuildFilter(ReceiveLinkDescription receiveLink)
{
string filter = string.Empty;
Map filters = null;
if (receiveLink.SequenceCheckPoint > -1)
{
filter = string.Format(
"amqp.annotation.x-opt-offset > {0}",
receiveLink.SequenceCheckPoint);
}
else if (receiveLink.TimeCheckPoint > DateTime.MinValue)
{
// Get milliseconds since start of 1970
long msOffset = (long)receiveLink.TimeCheckPoint.Subtract(
new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalMilliseconds;
filter = string.Format(
"amqp.annotation.x-opt-enqueuedtimeutc > {0}",
msOffset);
}
if (!string.IsNullOrWhiteSpace(filter))
{
filters = new Map();
filters.Add(new Symbol("apache.org:selector-filter:string"),
new DescribedValue(
new Symbol("apache.org:selector-filter:string"),
filter));
}
return filters;
}