/// <summary>
/// FanIn
/// </summary>
public IEnumerable<Activity> Load(ActivityStream stream, ActivityStreamOptions feedOptions)
{
// At this point we have all the streams with their timestamp
Dictionary<byte[], long> streamsToLoad = new StreamCrawler(streamStore).StreamsToLoad(stream, feedOptions.Paging.Timestamp);
Dictionary<string, DateTime> debug = streamsToLoad.ToDictionary(key => Encoding.UTF8.GetString(key.Key), val => DateTime.FromFileTimeUtc(val.Value));
feedOptions = feedOptions ?? ActivityStreamOptions.Default;
var snapshot = GetSnapshot(streamsToLoad, feedOptions);
SortedSet<Activity> buffer = new SortedSet<Activity>(Activity.ComparerDesc);
// Init
foreach (var str in streamsToLoad)
{
var streamId = str.Key;
FetchNextActivity(snapshot, streamId, buffer);
}
while (buffer.Count > 0)
{
Activity nextActivity = buffer.First();
buffer.Remove(nextActivity);
yield return nextActivity;
FetchNextActivity(snapshot, nextActivity.StreamId, buffer);
}
}
/// <summary>
/// FanIn
/// </summary>
public IEnumerable <Activity> Load(ActivityStream stream, ActivityStreamOptions feedOptions)
{
// At this point we have all the streams with their timestamp
Dictionary <byte[], long> streamsToLoad = new StreamCrawler(streamStore).StreamsToLoad(stream, feedOptions.Paging.Timestamp);
Dictionary <string, DateTime> debug = streamsToLoad.ToDictionary(key => Encoding.UTF8.GetString(key.Key), val => DateTime.FromFileTimeUtc(val.Value));
feedOptions = feedOptions ?? ActivityStreamOptions.Default;
var snapshot = GetSnapshot(streamsToLoad, feedOptions);
SortedSet <Activity> buffer = new SortedSet <Activity>(Activity.ComparerDesc);
// Init
foreach (var str in streamsToLoad)
{
var streamId = str.Key;
FetchNextActivity(snapshot, streamId, buffer);
}
while (buffer.Count > 0)
{
Activity nextActivity = buffer.First();
buffer.Remove(nextActivity);
yield return(nextActivity);
FetchNextActivity(snapshot, nextActivity.StreamId, buffer);
}
}
/// <summary>
/// Gets unordered activities snapshot for the specified streams.
/// </summary>
Dictionary <byte[], Queue <Activity> > GetSnapshot(Dictionary <byte[], long> streams, ActivityStreamOptions options)
{
var snapshot = new Dictionary <byte[], Queue <Activity> >(new ByteArrayEqualityComparer());
foreach (var stremToLoad in streams)
{
var timestamp = stremToLoad.Value < options.Paging.Timestamp ? stremToLoad.Value : options.Paging.Timestamp;
var pagingOptions = new Paging(timestamp, options.Paging.Take);
var newOptions = new ActivityStreamOptions(pagingOptions, options.SortOrder);
snapshot.Add(stremToLoad.Key, new Queue <Activity>(store.LoadStream(stremToLoad.Key, newOptions)));
}
return(snapshot);
}
public ResponseResult<StreamModel> LoadActivities(string streamId, DateTime? before = null, int take = 20, bool ascendingOrder = false)
{
if (before.HasValue == false)
before = DateTime.UtcNow;
var sortOrder = SortOrder.Descending;
if (ascendingOrder == true)
sortOrder = SortOrder.Ascending;
var options = new ActivityStreamOptions(new Paging(before.Value.ToFileTimeUtc(), take), sortOrder);
var streamIdBytes = Encoding.UTF8.GetBytes(streamId);
var stream = WebApiApplication.StreamService.Get(streamIdBytes);
var activities = WebApiApplication.ActivityRepository.Load(stream, options);
return new ResponseResult<StreamModel>(new StreamModel(activities));
}
public IEnumerable<Activity> LoadStream(byte[] streamId, ActivityStreamOptions options)
{
var sortOrder = options.SortOrder;
var paging = options.Paging;
SortedSet<Activity> stream;
if (activityStore.TryGetValue(streamId, out stream))
{
var result = stream.Where(x => x.Timestamp <= paging.Timestamp).Take(paging.Take);
foreach (var activity in result)
{
yield return activity;
}
}
else
{
yield break;
}
}
public IEnumerable <Activity> LoadStream(byte[] streamId, ActivityStreamOptions options)
{
var sortOrder = options.SortOrder;
var paging = options.Paging;
SortedSet <Activity> stream;
if (activityStore.TryGetValue(streamId, out stream))
{
var result = stream.Where(x => x.Timestamp <= paging.Timestamp).Take(paging.Take);
foreach (var activity in result)
{
yield return(activity);
}
}
else
{
yield break;
}
}
public ResponseResult <StreamModel> LoadActivities(string streamId, DateTime?before = null, int take = 20, bool ascendingOrder = false)
{
if (before.HasValue == false)
{
before = DateTime.UtcNow;
}
var sortOrder = SortOrder.Descending;
if (ascendingOrder == true)
{
sortOrder = SortOrder.Ascending;
}
var options = new ActivityStreamOptions(new Paging(before.Value.ToFileTimeUtc(), take), sortOrder);
var streamIdBytes = Encoding.UTF8.GetBytes(streamId);
var stream = WebApiApplication.StreamService.Get(streamIdBytes);
var activities = WebApiApplication.ActivityRepository.Load(stream, options);
return(new ResponseResult <StreamModel>(new StreamModel(activities)));
}
public IEnumerable <Activity> LoadStream(byte[] streamId, ActivityStreamOptions options)
{
options = options ?? ActivityStreamOptions.Default;
var statement = LoadActivityStreamQueryTemplateDesc;
SortedSet <Activity> activities = new SortedSet <Activity>(Activity.ComparerDesc);
var sortOrder = options.SortOrder;
var paging = options.Paging;
if (sortOrder == SortOrder.Ascending)
{
statement = LoadActivityStreamQueryTemplateAsc;
activities = new SortedSet <Activity>(Activity.ComparerAsc);
}
var streamIdQuery = Convert.ToBase64String(streamId);
var prepared = session
.Prepare(statement)
.Bind(streamIdQuery, paging.Timestamp)
.SetAutoPage(false)
.SetPageSize(paging.Take);
var rowSet = session.Execute(prepared);
foreach (var row in rowSet.GetRows())
{
using (var stream = new MemoryStream(row.GetValue <byte[]>("data")))
{
var storedActivity = (Activity)serializer.Deserialize(stream);
activities.Add(storedActivity);
}
}
return(activities);
}
public IEnumerable<Activity> LoadStream(byte[] streamId, ActivityStreamOptions options)
{
options = options ?? ActivityStreamOptions.Default;
var statement = LoadActivityStreamQueryTemplateDesc;
SortedSet<Activity> activities = new SortedSet<Activity>(Activity.ComparerDesc);
var sortOrder = options.SortOrder;
var paging = options.Paging;
if (sortOrder == SortOrder.Ascending)
{
statement = LoadActivityStreamQueryTemplateAsc;
activities = new SortedSet<Activity>(Activity.ComparerAsc);
}
var streamIdQuery = Convert.ToBase64String(streamId);
var prepared = session
.Prepare(statement)
.Bind(streamIdQuery, paging.Timestamp)
.SetAutoPage(false)
.SetPageSize(paging.Take);
var rowSet = session.Execute(prepared);
foreach (var row in rowSet.GetRows())
{
using (var stream = new MemoryStream(row.GetValue<byte[]>("data")))
{
var storedActivity = (Activity)serializer.Deserialize(stream);
activities.Add(storedActivity);
}
}
return activities;
}
/// <summary>
/// Gets unordered activities snapshot for the specified streams.
/// </summary>
Dictionary<byte[], Queue<Activity>> GetSnapshot(Dictionary<byte[], long> streams, ActivityStreamOptions options)
{
var snapshot = new Dictionary<byte[], Queue<Activity>>(new ByteArrayEqualityComparer());
foreach (var stremToLoad in streams)
{
var timestamp = stremToLoad.Value < options.Paging.Timestamp ? stremToLoad.Value : options.Paging.Timestamp;
var pagingOptions = new Paging(timestamp, options.Paging.Take);
var newOptions = new ActivityStreamOptions(pagingOptions, options.SortOrder);
snapshot.Add(stremToLoad.Key, new Queue<Activity>(store.LoadStream(stremToLoad.Key, newOptions)));
}
return snapshot;
}
