public void LogFunctionStarted(FunctionInstanceSnapshot snapshot)
{
// Which operation to run depends on whether or not the entity currently exists in the "queued" status.
IConcurrentDocument <FunctionInstanceSnapshot> existingSnapshot = _store.Read(GetId(snapshot));
bool previouslyQueued;
// If the existing entity doesn't contain a StartTime, it must be in the "queued" status.
if (existingSnapshot != null && existingSnapshot.Document != null && !existingSnapshot.Document.StartTime.HasValue)
{
previouslyQueued = true;
}
else
{
previouslyQueued = false;
}
if (!previouslyQueued)
{
LogFunctionStartedWhenNotPreviouslyQueued(snapshot);
}
else
{
LogFunctionStartedWhenPreviouslyQueued(snapshot, existingSnapshot.ETag);
}
}
public FunctionStatistics Lookup(string functionId)
{
IConcurrentDocument <FunctionStatistics> result = _store.Read(functionId);
if (result == null)
{
return(null);
}
return(result.Document);
}
private bool TryUpdateEntity(string functionId, Action <FunctionStatistics> modifier)
{
IConcurrentDocument <FunctionStatistics> result = _store.Read(functionId);
if (result == null || result.Document == null)
{
FunctionStatistics statistics = new FunctionStatistics();
modifier.Invoke(statistics);
return(_store.TryCreate(functionId, statistics));
}
else
{
FunctionStatistics statistics = result.Document;
modifier.Invoke(statistics);
return(_store.TryUpdate(functionId, result.ETag, statistics));
}
}