public static EntryElement ToEntry(EventRecord evnt, string userHostName)
{
if (evnt == null || userHostName == null)
{
return(null);
}
var entry = new EntryElement();
entry.SetTitle(String.Format("{0} #{1}", evnt.EventStreamId, evnt.EventNumber));
entry.SetId(HostName.Combine(userHostName, "/streams/{0}/{1}", evnt.EventStreamId, evnt.EventNumber));
entry.SetUpdated(evnt.TimeStamp);
entry.SetAuthor(AtomSpecs.Author);
entry.SetSummary(String.Format("Entry #{0}", evnt.EventNumber));
entry.AddLink(HostName.Combine(userHostName, "/streams/{0}/{1}", evnt.EventStreamId, evnt.EventNumber), "edit", null);
entry.AddLink(
HostName.Combine(userHostName, "/streams/{0}/event/{1}?format=text", evnt.EventStreamId, evnt.EventNumber),
null,
ContentType.PlainText);
entry.AddLink(
HostName.Combine(userHostName, "/streams/{0}/event/{1}?format=json", evnt.EventStreamId, evnt.EventNumber),
"alternate",
ContentType.Json);
entry.AddLink(
HostName.Combine(userHostName, "/streams/{0}/event/{1}?format=xml", evnt.EventStreamId, evnt.EventNumber),
"alternate",
ContentType.Xml);
return(entry);
}
public static FeedElement ToAllEventsBackwardFeed(ClientMessage.ReadAllEventsBackwardCompleted msg, Uri requestedUrl, EmbedLevel embedContent)
{
var self = HostName.Combine(requestedUrl, "/streams/{0}", AllEscaped);
var feed = new FeedElement();
feed.SetTitle(string.Format("All events"));
feed.SetId(self);
feed.SetUpdated(msg.Events.Length > 0 && msg.Events[0].Event != null ? msg.Events[0].Event.TimeStamp : DateTime.MinValue.ToUniversalTime());
feed.SetAuthor(AtomSpecs.Author);
feed.AddLink("self", self);
feed.AddLink("first", HostName.Combine(requestedUrl, "/streams/{0}/head/backward/{1}", AllEscaped, msg.MaxCount));
if (!msg.IsEndOfStream)
{
feed.AddLink("last", HostName.Combine(requestedUrl, "/streams/{0}/{1}/forward/{2}", AllEscaped, new TFPos(0, 0).AsString(), msg.MaxCount));
feed.AddLink("next", HostName.Combine(requestedUrl, "/streams/{0}/{1}/backward/{2}", AllEscaped, msg.NextPos.AsString(), msg.MaxCount));
}
feed.AddLink("previous", HostName.Combine(requestedUrl, "/streams/{0}/{1}/forward/{2}", AllEscaped, msg.PrevPos.AsString(), msg.MaxCount));
feed.AddLink("metadata", HostName.Combine(requestedUrl, "/streams/{0}/metadata", AllEscaped));
for (int i = 0; i < msg.Events.Length; ++i)
{
feed.AddEntry(
ToEntry(
new ResolvedEvent(msg.Events[i].Event, msg.Events[i].Link, msg.Events[i].ResolveResult),
requestedUrl, embedContent));
}
return(feed);
}
public static ResponseConfiguration WriteEventsCompleted(HttpResponseConfiguratorArgs entity, Message message, string eventStreamId)
{
var msg = message as ClientMessage.WriteEventsCompleted;
if (msg != null)
{
switch (msg.Result)
{
case OperationResult.Success:
var location = HostName.Combine(entity.RequestedUrl, "/streams/{0}/{1}",
Uri.EscapeDataString(eventStreamId), msg.FirstEventNumber);
return new ResponseConfiguration(HttpStatusCode.Created, "Created", "text/plain", Helper.UTF8NoBom,
new KeyValuePair<string, string>("Location", location));
case OperationResult.PrepareTimeout:
case OperationResult.CommitTimeout:
case OperationResult.ForwardTimeout:
return InternalServerError("Write timeout");
case OperationResult.WrongExpectedVersion:
return BadRequest("Wrong expected EventNumber");
case OperationResult.StreamDeleted:
return Gone("Stream deleted");
case OperationResult.InvalidTransaction:
return InternalServerError("Invalid transaction");
case OperationResult.AccessDenied:
return Unauthorized();
default:
throw new ArgumentOutOfRangeException();
}
}
var notHandled = message as ClientMessage.NotHandled;
if (notHandled != null)
return HandleNotHandled(entity.RequestedUrl, notHandled);
return InternalServerError();
}
public static FeedElement ToStreamEventBackwardFeed(ClientMessage.ReadStreamEventsBackwardCompleted msg,
Uri requestedUrl, EmbedLevel embedContent, bool headOfStream)
{
Ensure.NotNull(msg, "msg");
string escapedStreamId = Uri.EscapeDataString(msg.EventStreamId);
var self = HostName.Combine(requestedUrl, "/streams/{0}", escapedStreamId);
var feed = new FeedElement();
feed.SetTitle(string.Format("Event stream '{0}'", msg.EventStreamId));
feed.StreamId = msg.EventStreamId;
feed.SetId(self);
feed.SetUpdated(msg.Events.Length > 0 && msg.Events[0].Event != null
? msg.Events[0].Event.TimeStamp
: DateTime.MinValue.ToUniversalTime());
feed.SetAuthor(AtomSpecs.Author);
feed.SetHeadOfStream(headOfStream); //TODO AN: remove this ?
feed.SetSelfUrl(self);
//TODO AN: remove this ?
if (headOfStream) //NOTE: etag workaround - to be fixed with better http handling model
{
feed.SetETag(Configure.GetPositionETag(msg.LastEventNumber, ContentType.AtomJson));
}
var prevEventNumber = Math.Min(msg.FromEventNumber, msg.LastEventNumber) + 1;
var nextEventNumber = msg.FromEventNumber - msg.MaxCount;
feed.AddLink("self", self);
feed.AddLink("first",
HostName.Combine(requestedUrl, "/streams/{0}/head/backward/{1}", escapedStreamId, msg.MaxCount));
if (!msg.IsEndOfStream)
{
if (nextEventNumber < 0)
{
throw new Exception(string.Format("nextEventNumber is negative: {0} while IsEndOfStream",
nextEventNumber));
}
feed.AddLink("last",
HostName.Combine(requestedUrl, "/streams/{0}/{1}/forward/{2}", escapedStreamId, 0, msg.MaxCount));
feed.AddLink("next",
HostName.Combine(requestedUrl, "/streams/{0}/{1}/backward/{2}", escapedStreamId, nextEventNumber,
msg.MaxCount));
}
feed.AddLink("previous",
HostName.Combine(requestedUrl, "/streams/{0}/{1}/forward/{2}", escapedStreamId, prevEventNumber,
msg.MaxCount));
feed.AddLink("metadata", HostName.Combine(requestedUrl, "/streams/{0}/metadata", escapedStreamId));
for (int i = 0; i < msg.Events.Length; ++i)
{
feed.AddEntry(ToEntry(msg.Events[i], requestedUrl, embedContent));
}
return(feed);
}
public static ServiceDocument ToServiceDocument(IEnumerable <string> userStreams,
IEnumerable <string> systemStreams,
string userHostName)
{
if (userStreams == null || systemStreams == null || userHostName == null)
{
return(null);
}
var document = new ServiceDocument();
var userWorkspace = new WorkspaceElement();
userWorkspace.SetTitle("User event streams");
var systemWorkspace = new WorkspaceElement();
systemWorkspace.SetTitle("System event streams");
foreach (var userStream in userStreams)
{
var collection = new CollectionElement();
collection.SetTitle(userStream);
collection.SetUri(HostName.Combine(userHostName, "/streams/{0}", userStream));
collection.AddAcceptType(ContentType.Xml);
collection.AddAcceptType(ContentType.Atom);
collection.AddAcceptType(ContentType.Json);
collection.AddAcceptType(ContentType.AtomJson);
userWorkspace.AddCollection(collection);
}
foreach (var systemStream in systemStreams)
{
var collection = new CollectionElement();
collection.SetTitle(systemStream);
collection.SetUri(HostName.Combine(userHostName, "/streams/{0}", systemStream));
collection.AddAcceptType(ContentType.Xml);
collection.AddAcceptType(ContentType.Atom);
collection.AddAcceptType(ContentType.Json);
collection.AddAcceptType(ContentType.AtomJson);
systemWorkspace.AddCollection(collection);
}
document.AddWorkspace(userWorkspace);
document.AddWorkspace(systemWorkspace);
return(document);
}
public static FeedElement ToFeed(string eventStreamId,
int start,
int count,
DateTime updateTime,
EventRecord[] items,
Func <EventRecord, string, EntryElement> itemToEntry,
string userHostName)
{
if (string.IsNullOrEmpty(eventStreamId) || items == null || userHostName == null)
{
return(null);
}
if (start == -1)
{
start = GetActualStart(items);
}
var self = HostName.Combine(userHostName, "/streams/{0}", eventStreamId);
var feed = new FeedElement();
feed.SetTitle(String.Format("Event stream '{0}'", eventStreamId));
feed.SetId(self);
feed.SetUpdated(updateTime);
feed.SetAuthor(AtomSpecs.Author);
feed.AddLink(self, "self", null);
feed.AddLink(HostName.Combine(userHostName,
"/streams/{0}/range/{1}/{2}",
eventStreamId,
AtomSpecs.FeedPageSize - 1,
AtomSpecs.FeedPageSize),
"first",
null);
feed.AddLink(HostName.Combine(userHostName,
"/streams/{0}/range/{1}/{2}",
eventStreamId,
PrevStart(start),
AtomSpecs.FeedPageSize),
"prev",
null);
feed.AddLink(HostName.Combine(userHostName,
"/streams/{0}/range/{1}/{2}",
eventStreamId,
NextStart(start),
AtomSpecs.FeedPageSize),
"next",
null);
foreach (var item in items)
{
feed.AddEntry(itemToEntry(item, userHostName));
}
return(feed);
}
public static FeedElement ToNextNPersistentMessagesFeed(ClientMessage.ReadNextNPersistentMessagesCompleted msg,
Uri requestedUrl, string streamId, string groupName, int count, EmbedLevel embedContent)
{
string escapedStreamId = Uri.EscapeDataString(streamId);
string escapedGroupName = Uri.EscapeDataString(groupName);
var self = HostName.Combine(requestedUrl, "/subscriptions/{0}/{1}", escapedStreamId, escapedGroupName);
var feed = new FeedElement();
feed.SetTitle(string.Format("Messages for '{0}/{1}'", streamId, groupName));
feed.SetId(self);
feed.SetUpdated(msg.Events.Length > 0 && msg.Events[0].ResolvedEvent.Event != null
? msg.Events[msg.Events.Length - 1].ResolvedEvent.Event.TimeStamp
: DateTime.MinValue.ToUniversalTime());
feed.SetAuthor(AtomSpecs.Author);
if (msg.Events != null && msg.Events.Length > 0)
{
var ackAllQueryString = String.Format("?ids={0}",
String.Join(",", msg.Events.Select(x => x.ResolvedEvent.OriginalEvent.EventId)));
var ackAll =
HostName.Combine(requestedUrl, "/subscriptions/{0}/{1}/ack", escapedStreamId, escapedGroupName) +
ackAllQueryString;
feed.AddLink("ackAll", ackAll);
var nackAllQueryString = String.Format("?ids={0}",
String.Join(",", msg.Events.Select(x => x.ResolvedEvent.OriginalEvent.EventId)));
var nackAll =
HostName.Combine(requestedUrl, "/subscriptions/{0}/{1}/nack", escapedStreamId, escapedGroupName) +
nackAllQueryString;
feed.AddLink("nackAll", nackAll);
}
var prev = HostName.Combine(requestedUrl, "/subscriptions/{0}/{1}/{2}", escapedStreamId, escapedGroupName,
count);
feed.AddLink("previous", prev);
feed.AddLink("self", self);
for (int i = msg.Events.Length - 1; i >= 0; --i)
{
var entry = ToEntry(msg.Events[i].ResolvedEvent.WithoutPosition(), requestedUrl, embedContent);
var ack = HostName.Combine(requestedUrl, "/subscriptions/{0}/{1}/ack/{2}", escapedStreamId,
escapedGroupName, msg.Events[i].ResolvedEvent.OriginalEvent.EventId);
var nack = HostName.Combine(requestedUrl, "/subscriptions/{0}/{1}/nack/{2}", escapedStreamId,
escapedGroupName, msg.Events[i].ResolvedEvent.OriginalEvent.EventId);
entry.AddLink("ack", ack);
entry.AddLink("nack", nack);
entry.AddRetryCount(msg.Events[i].RetryCount);
feed.AddEntry(entry);
}
return(feed);
}
private static void SetEntryProperties(string stream, int eventNumber, DateTime timestamp, Uri requestedUrl, EntryElement entry)
{
var escapedStreamId = Uri.EscapeDataString(stream);
entry.SetTitle(eventNumber + "@" + stream);
entry.SetId(HostName.Combine(requestedUrl, "/streams/{0}/{1}", escapedStreamId, eventNumber));
entry.SetUpdated(timestamp);
entry.SetAuthor(AtomSpecs.Author);
entry.AddLink("edit",
HostName.Combine(requestedUrl, "/streams/{0}/{1}", escapedStreamId, eventNumber));
entry.AddLink("alternate",
HostName.Combine(requestedUrl, "/streams/{0}/{1}", escapedStreamId, eventNumber));
}
public static FeedElement ToStreamEventForwardFeed(ClientMessage.ReadStreamEventsForwardCompleted msg,
Uri requestedUrl, EmbedLevel embedContent)
{
Ensure.NotNull(msg, "msg");
string escapedStreamId = Uri.EscapeDataString(msg.EventStreamId);
var self = HostName.Combine(requestedUrl, "/streams/{0}", escapedStreamId);
var feed = new FeedElement();
feed.SetTitle(string.Format("Event stream '{0}'", msg.EventStreamId));
feed.StreamId = msg.EventStreamId;
feed.SetId(self);
feed.SetUpdated(msg.Events.Length > 0 && msg.Events[0].Event != null
? msg.Events[0].Event.TimeStamp
: DateTime.MinValue.ToUniversalTime());
feed.SetAuthor(AtomSpecs.Author);
feed.SetHeadOfStream(msg.IsEndOfStream);
var prevEventNumber = Math.Min(msg.FromEventNumber + msg.MaxCount - 1, msg.LastEventNumber) + 1;
var nextEventNumber = msg.FromEventNumber - 1;
feed.AddLink("self", self);
feed.AddLink("first",
HostName.Combine(requestedUrl, "/streams/{0}/head/backward/{1}", escapedStreamId, msg.MaxCount));
if (nextEventNumber >= 0)
{
feed.AddLink("last",
HostName.Combine(requestedUrl, "/streams/{0}/{1}/forward/{2}", escapedStreamId, 0, msg.MaxCount));
feed.AddLink("next",
HostName.Combine(requestedUrl, "/streams/{0}/{1}/backward/{2}", escapedStreamId, nextEventNumber,
msg.MaxCount));
}
if (!msg.IsEndOfStream || msg.Events.Length > 0)
{
feed.AddLink("previous",
HostName.Combine(requestedUrl, "/streams/{0}/{1}/forward/{2}", escapedStreamId, prevEventNumber,
msg.MaxCount));
}
if (!escapedStreamId.StartsWith("$$"))
{
feed.AddLink("metadata", HostName.Combine(requestedUrl, "/streams/{0}/metadata", escapedStreamId));
}
for (int i = msg.Events.Length - 1; i >= 0; --i)
{
feed.AddEntry(ToEntry(msg.Events[i], requestedUrl, embedContent));
}
return(feed);
}
public static FeedElement ToAllEventsBackwardFeed(ReadAllResult result,
Func <EventRecord, string, EntryElement> itemToEntry,
string userHostName)
{
var self = HostName.Combine(userHostName, "/streams/$all");
var feed = new FeedElement();
feed.SetTitle(String.Format("All events"));
feed.SetId(self);
var items = result.Records.Select(rer => rer.Event).ToList();
feed.SetUpdated(items.Any() ? items.First().TimeStamp : DateTime.MinValue.ToUniversalTime());
feed.SetAuthor(AtomSpecs.Author);
feed.AddLink(self, "self", null);
feed.AddLink(HostName.Combine(userHostName,
"/streams/$all/{0}",
result.MaxCount),
"first",
null);
feed.AddLink(HostName.Combine(userHostName,
"/streams/$all/after/{0}/{1}",
new TFPos(0, 0).AsString(),
result.MaxCount),
"last",
null);
feed.AddLink(HostName.Combine(userHostName,
"/streams/$all/after/{0}/{1}",
result.PrevPos.AsString(),
result.MaxCount),
"prev",
null);
feed.AddLink(HostName.Combine(userHostName,
"/streams/$all/before/{0}/{1}",
result.NextPos.AsString(),
result.MaxCount),
"next",
null);
foreach (var item in items)
{
feed.AddEntry(itemToEntry(item, userHostName));
}
return(feed);
}
public static ResponseConfiguration WriteEventsCompleted(HttpEntity entity, Message message)
{
Debug.Assert(message.GetType() == typeof(ClientMessage.WriteEventsCompleted));
var completed = message as ClientMessage.WriteEventsCompleted;
if (completed == null)
{
return(InternalServerEror(entity, message));
}
switch (completed.ErrorCode)
{
case OperationErrorCode.Success:
return(new ResponseConfiguration(HttpStatusCode.Created,
"Created",
null,
new KeyValuePair <string, string>("Location",
HostName.Combine(entity.UserHostName,
"/streams/{0}/{1}",
completed.EventStreamId,
completed.EventNumber == 0 ? 1 : completed.EventNumber))));
case OperationErrorCode.PrepareTimeout:
case OperationErrorCode.CommitTimeout:
case OperationErrorCode.ForwardTimeout:
return(new ResponseConfiguration(HttpStatusCode.InternalServerError, "Write timeout", null));
case OperationErrorCode.WrongExpectedVersion:
return(new ResponseConfiguration(HttpStatusCode.BadRequest, "Wrong expected version", null));
case OperationErrorCode.StreamDeleted:
return(new ResponseConfiguration(HttpStatusCode.Gone, "Stream deleted", null));
case OperationErrorCode.InvalidTransaction:
return(new ResponseConfiguration(HttpStatusCode.InternalServerError, "Invalid transaction", null));
default:
throw new ArgumentOutOfRangeException();
}
}
public static FeedElement ToAllEventsForwardFilteredFeed(ClientMessage.FilteredReadAllEventsForwardCompleted msg,
Uri requestedUrl, EmbedLevel embedContent)
{
var self = HostName.Combine(requestedUrl, "/streams/{0}", AllFilteredEscaped);
var feed = new FeedElement();
feed.SetTitle("All events");
feed.SetId(self);
feed.SetUpdated(msg.Events.Length > 0 && msg.Events[0].Event != null
? msg.Events[msg.Events.Length - 1].Event.TimeStamp
: DateTime.MinValue.ToUniversalTime());
feed.SetAuthor(AtomSpecs.Author);
feed.AddLink("self", self);
feed.AddLink("first",
HostName.Combine(requestedUrl, "/streams/{0}/head/backward/{1}", AllFilteredEscaped, msg.MaxCount));
if (msg.CurrentPos.CommitPosition != 0)
{
feed.AddLink("last",
HostName.Combine(requestedUrl, "/streams/{0}/{1}/forward/{2}", AllFilteredEscaped,
new TFPos(0, 0).AsString(), msg.MaxCount));
feed.AddLink("next",
HostName.Combine(requestedUrl, "/streams/{0}/{1}/backward/{2}", AllFilteredEscaped, msg.PrevPos.AsString(),
msg.MaxCount));
}
if (!msg.IsEndOfStream || msg.Events.Length > 0)
{
feed.AddLink("previous",
HostName.Combine(requestedUrl, "/streams/{0}/{1}/forward/{2}", AllFilteredEscaped, msg.NextPos.AsString(),
msg.MaxCount));
}
for (int i = msg.Events.Length - 1; i >= 0; --i)
{
feed.AddEntry(ToEntry(msg.Events[i].WithoutPosition(), requestedUrl, embedContent));
}
return(feed);
}
public static EntryElement ToEntry(ResolvedEvent eventLinkPair, Uri requestedUrl, EmbedLevel embedContent, bool singleEntry = false)
{
if (eventLinkPair.Event == null || requestedUrl == null)
{
return(null);
}
var evnt = eventLinkPair.Event;
EntryElement entry;
if (embedContent > EmbedLevel.Content)
{
var richEntry = new RichEntryElement();
entry = richEntry;
richEntry.EventType = evnt.EventType;
richEntry.EventNumber = evnt.EventNumber;
richEntry.StreamId = evnt.EventStreamId;
richEntry.PositionEventNumber = eventLinkPair.OriginalEvent.EventNumber;
richEntry.PositionStreamId = eventLinkPair.OriginalEvent.EventStreamId;
richEntry.IsJson = (evnt.Flags & PrepareFlags.IsJson) != 0;
if (embedContent >= EmbedLevel.Body)
{
if (richEntry.IsJson)
{
if (embedContent >= EmbedLevel.PrettyBody)
{
try
{
richEntry.Data = Helper.UTF8NoBom.GetString(evnt.Data);
// next step may fail, so we have already assigned body
richEntry.Data = FormatJson(Helper.UTF8NoBom.GetString(evnt.Data));
}
catch
{
// ignore - we tried
}
}
else
{
richEntry.Data = Helper.UTF8NoBom.GetString(evnt.Data);
}
}
else if (embedContent >= EmbedLevel.TryHarder)
{
try
{
richEntry.Data = Helper.UTF8NoBom.GetString(evnt.Data);
// next step may fail, so we have already assigned body
richEntry.Data = FormatJson(richEntry.Data);
// it is json if successed
richEntry.IsJson = true;
}
catch
{
// ignore - we tried
}
}
// metadata
if (embedContent >= EmbedLevel.PrettyBody)
{
try
{
richEntry.MetaData = Helper.UTF8NoBom.GetString(evnt.Metadata);
richEntry.IsMetaData = richEntry.MetaData.IsNotEmptyString();
// next step may fail, so we have already assigned body
richEntry.MetaData = FormatJson(richEntry.MetaData);
}
catch
{
// ignore - we tried
}
var lnk = eventLinkPair.Link;
if (lnk != null)
{
try
{
richEntry.LinkMetaData = Helper.UTF8NoBom.GetString(lnk.Metadata);
richEntry.IsLinkMetaData = richEntry.LinkMetaData.IsNotEmptyString();
// next step may fail, so we have already assigned body
richEntry.LinkMetaData = FormatJson(richEntry.LinkMetaData);
}
catch
{
// ignore - we tried
}
}
}
}
}
else
{
entry = new EntryElement();
}
var escapedStreamId = Uri.EscapeDataString(evnt.EventStreamId);
entry.SetTitle(evnt.EventNumber + "@" + evnt.EventStreamId);
entry.SetId(HostName.Combine(requestedUrl, "/streams/{0}/{1}", escapedStreamId, evnt.EventNumber));
entry.SetUpdated(evnt.TimeStamp);
entry.SetAuthor(AtomSpecs.Author);
entry.SetSummary(evnt.EventType);
if ((singleEntry || embedContent == EmbedLevel.Content) && ((evnt.Flags & PrepareFlags.IsJson) != 0))
{
entry.SetContent(AutoEventConverter.CreateDataDto(eventLinkPair));
}
entry.AddLink("edit", HostName.Combine(requestedUrl, "/streams/{0}/{1}", escapedStreamId, evnt.EventNumber));
entry.AddLink("alternate", HostName.Combine(requestedUrl, "/streams/{0}/{1}", escapedStreamId, evnt.EventNumber));
return(entry);
}
