/// <summary>
/// Get offset from cached message. Left to derived class, as only it knows how to get this from the cached message.
/// </summary>
public virtual string GetOffset(CachedMessage lastItemPurged)
{
// TODO figure out how to get this from the adapter
int readOffset = 0;
return(SegmentBuilder.ReadNextString(lastItemPurged.Segment, ref readOffset)); // read offset
}
protected override string GetOffset(CachedEventHubMessage lastItemPurged)
{
int readOffset = 0;
SegmentBuilder.ReadNextString(lastItemPurged.Segment, ref readOffset); // read namespace, not needed so throw away.
return(SegmentBuilder.ReadNextString(lastItemPurged.Segment, ref readOffset)); // read offset
}
private void OnPurged(CachedEventHubMessage lastItemPurged)
{
int readOffset = 0;
SegmentBuilder.ReadNextString(lastItemPurged.Segment, ref readOffset); // read namespace, not needed so throw away.
string offset = SegmentBuilder.ReadNextString(lastItemPurged.Segment, ref readOffset); // read offset
checkpoint.Update(offset, DateTime.UtcNow);
}
public IBatchContainer GetBatchContainer(ref CachedEventHubMessage cachedMessage)
{
int readOffset = 0;
string streamNamespace = SegmentBuilder.ReadNextString(cachedMessage.Segment, ref readOffset);
string offset = SegmentBuilder.ReadNextString(cachedMessage.Segment, ref readOffset);
ArraySegment <byte> payload = SegmentBuilder.ReadNextBytes(cachedMessage.Segment, ref readOffset);
return(new EventHubBatchContainer(cachedMessage.StreamGuid, streamNamespace, offset, cachedMessage.SequenceNumber, payload.ToArray()));
}
public bool IsInStream(ref CachedEventHubMessage cachedMessage, Guid streamGuid, string streamNamespace)
{
// fail out early if guids does not match. Don't incur cost of decoding namespace unless necessary.
if (cachedMessage.StreamGuid != streamGuid)
{
return(false);
}
int readOffset = 0;
string decodedStreamNamespace = SegmentBuilder.ReadNextString(cachedMessage.Segment, ref readOffset);
return(decodedStreamNamespace == streamNamespace);
}
/// <summary>
/// Duplicate of EventHub's EventData class.
/// </summary>
/// <param name="cachedMessage"></param>
public EventHubMessage(CachedEventHubMessage cachedMessage)
{
int readOffset = 0;
StreamIdentity = new StreamIdentity(cachedMessage.StreamGuid, SegmentBuilder.ReadNextString(cachedMessage.Segment, ref readOffset));
Offset = SegmentBuilder.ReadNextString(cachedMessage.Segment, ref readOffset);
PartitionKey = SegmentBuilder.ReadNextString(cachedMessage.Segment, ref readOffset);
SequenceNumber = cachedMessage.SequenceNumber;
EnqueueTimeUtc = cachedMessage.EnqueueTimeUtc;
DequeueTimeUtc = cachedMessage.DequeueTimeUtc;
Properties = SegmentBuilder.ReadNextBytes(cachedMessage.Segment, ref readOffset).DeserializeProperties();
Payload = SegmentBuilder.ReadNextBytes(cachedMessage.Segment, ref readOffset).ToArray();
}
public bool Equals(CachedEventHubMessage cachedMessage, IStreamIdentity streamIdentity)
{
int result = cachedMessage.StreamGuid.CompareTo(streamIdentity.Guid);
if (result != 0)
{
return(false);
}
int readOffset = 0;
string decodedStreamNamespace = SegmentBuilder.ReadNextString(cachedMessage.Segment, ref readOffset);
return(string.Compare(decodedStreamNamespace, streamIdentity.Namespace, StringComparison.Ordinal) == 0);
}
public EventHubMessage(CachedEventHubMessage cachedMessage)
{
int readOffset = 0;
StreamIdentity = new StreamIdentity(cachedMessage.StreamGuid, SegmentBuilder.ReadNextString(cachedMessage.Segment, ref readOffset));
Offset = SegmentBuilder.ReadNextString(cachedMessage.Segment, ref readOffset);
SequenceNumber = cachedMessage.SequenceNumber;
EnqueueTimeUtc = cachedMessage.EnqueueTimeUtc;
DequeueTimeUtc = cachedMessage.DequeueTimeUtc;
Properties = SegmentBuilder.ReadNextBytes(cachedMessage.Segment, ref readOffset).DeserializeProperties();
object offsetObj;
PartitionKey = Properties.TryGetValue("PartitionKey", out offsetObj)
? offsetObj as string
: default(string);
Payload = SegmentBuilder.ReadNextBytes(cachedMessage.Segment, ref readOffset).ToArray();
}
