public void Create(FeedEntry entry)
{
if (IsValid(entry))
{
IFeedEntryEntityWrapper cWrapper = FeedEntryWrapperFactory.Create(_context.ResourceKind, _context);
SdataTransactionResult trResult = cWrapper.Add(entry);
if (trResult.HttpStatus == System.Net.HttpStatusCode.Created ||
trResult.HttpStatus == System.Net.HttpStatusCode.OK)
{
if (string.IsNullOrEmpty(entry.Id))
{
entry.Id = trResult.Location;
}
_request.Response.FeedEntry = entry;
_request.Response.Protocol.SendKnownResponseHeader(System.Net.HttpResponseHeader.Location, entry.Id);
}
else
{
_request.Response.StatusCode = trResult.HttpStatus;
_request.Response.Diagnoses = new Diagnoses();
_request.Response.Diagnoses.Add(GetDiagnosis(trResult));
//throw new InvalidDataException(trResult.HttpStatus + ": " + trResult.HttpMessage);
}
}
else
{
throw new RequestException("Please use valid single resource url");
}
}
public CRUD(IRequest request)
{
_context = new RequestContext(request.Uri);
_wrapper = FeedEntryWrapperFactory.Create(_context.ResourceKind, _context);
_request = request;
}
public void Update(FeedEntry entry)
{
// only atom entry supported!!!
if (_request.ContentType != Sage.Common.Syndication.MediaType.AtomEntry)
{
throw new RequestException("Atom entry content type expected");
}
// resource key must exist in url
if (string.IsNullOrEmpty(_requestContext.ResourceKey))
{
throw new RequestException("ResourceKey missing in requested url.");
}
string requestEndPointUrl;
RequestContext entryResourceAsRequestContext;
string url; // The url that references an existing resource
string localId; // will be parsed from urlAttrValue and set to the key attribute of the result resource payload
Guid uuid; // the new uuid
// retrieve the feed entry
//entry = FeedComponentFactory.Create<ILinkingResourceFeedEntry>(request.Stream);
// Get the uuid from query
uuid = (Guid)TypeDescriptor.GetConverter(typeof(Guid)).ConvertFrom(_requestContext.ResourceKey);
if (null == entry)
{
throw new RequestException("sdata payload element missing");
}
// the consumer MUST provide an sdata:url attribute that references an existing resource.
url = entry.Uri;
if (string.IsNullOrEmpty(url))
{
throw new RequestException("sdata url attribute missing for resource payload element.");
}
// Parse the url of thew url attribute to get the local id.
// Additionally we check for equality of the urls of the request url and
// in the linked element up to the resourceKind.
requestEndPointUrl = _requestContext.OriginEndPoint;
entryResourceAsRequestContext = new RequestContext(new Sage.Common.Syndication.SDataUri(url)); // TODO: not really nice here.
string linkedResourceUrl = entryResourceAsRequestContext.OriginEndPoint;
if (!string.Equals(requestEndPointUrl, linkedResourceUrl, StringComparison.InvariantCultureIgnoreCase))
{
throw new RequestException("Request url and linked entry resource not matching.");
}
string resourceKindName = _requestContext.ResourceKind.ToString();
localId = entryResourceAsRequestContext.ResourceKey;
// The correlation store
ICorrelatedResSyncInfoStore correlatedResSyncInfoStore = NorthwindAdapter.StoreLocator.GetCorrelatedResSyncStore(_requestContext.SdataContext);
// update the correlation entry in the sync store.
// if uuid is not in use -> throw exception
// if resource is already linked -> remove existing link, reassign link
// if resource is not yet linked -> reassign link
CorrelatedResSyncInfo[] correlations;
CorrelatedResSyncInfo correlationToModify = null;
// retrieve the correlation we want to reassign by given uuid
correlations = correlatedResSyncInfoStore.GetByUuid(resourceKindName, new Guid[] { uuid });
if (correlations.Length > 0)
{
correlationToModify = correlations[0];
}
else
{
throw new RequestException("Uuid not in use");
}
//remember the old Correlation for the new localId, will be deleted after the update.
CorrelatedResSyncInfo[] oldCorrelations = correlatedResSyncInfoStore.GetByLocalId(resourceKindName, new string[] { localId });
// change the local ID to link to the new resource.
// change the modification stamp and reset the tick
correlationToModify.LocalId = localId;
correlationToModify.ResSyncInfo.ModifiedStamp = DateTime.Now;
correlationToModify.ResSyncInfo.Tick = 1;
// update the correlation
correlatedResSyncInfoStore.Update(resourceKindName, correlationToModify);
//If updating went OK, delete the old correlation for the new localId (should be only 1, for-loop just to be sure to catch em all)
foreach (CorrelatedResSyncInfo oldCorrelation in oldCorrelations)
{
correlatedResSyncInfoStore.Delete(resourceKindName, oldCorrelation.ResSyncInfo.Uuid);
}
// If the service consumer only needs to retrieve the URL, not the actual payload,
// it may do so by adding an empty select parameter to its request:
// a) select parameter not exist -> return deep resource payload
// b) select exists and empty -> return no resource payload
// c) select exists and not empty -> return deep resource payload as we do not yet support payload filtering
// with select parameter.
string tmpValue;
// ?select
bool includeResourcePayloads = true; // default value, but check for select parameter now
if (_requestContext.SdataUri.QueryArgs.TryGetValue("select", out tmpValue))
{
if (string.IsNullOrEmpty(_requestContext.SdataUri.QueryArgs["select"]))
{
includeResourcePayloads = false;
}
}
// Create an entity wrapper if resource data should be requested. Otherwise
// leave wrapper null.
IFeedEntryEntityWrapper wrapper = null;
//if (includeResourcePayloads) //TODO: Comment this in as soon as there is a possibility to send empty payload objects
wrapper = FeedEntryWrapperFactory.Create(_requestContext.ResourceKind, _requestContext);
/* Create the response entry */
_request.Response.FeedEntry = (FeedEntry)this.BuildFeedEntryForCorrelation(correlationToModify, wrapper);
_request.Response.ContentType = MediaType.AtomEntry;
}
public void Create(FeedEntry entry)
{
// only atom entry supported!!!
if (_request.ContentType != Sage.Common.Syndication.MediaType.AtomEntry)
{
throw new RequestException("Atom entry content type expected");
}
string requestEndPointUrl;
RequestContext entryResourceAsRequestContext;
string url; // The url that references an existing resource
string localId; // will be parsed from urlAttrValue and set to the key attribute of the result resource payload
Guid uuid; // the new uuid
if (null == entry)
{
throw new RequestException("sdata payload element missing");
}
// the consumer MUST provide an sdata:url attribute that references an existing resource.
url = entry.Uri;
if (string.IsNullOrEmpty(url))
{
throw new RequestException("sdata url attribute missing for resource payload element.");
}
// Parse the url of thew url attribute to get the local id.
// Additionally we check for equality of the urls of the request url and
// in the linked element up to the resourceKind.
requestEndPointUrl = _requestContext.OriginEndPoint;
entryResourceAsRequestContext = new RequestContext(new Sage.Common.Syndication.SDataUri(url)); // TODO: not really nice here.
string linkedResourceUrl = entryResourceAsRequestContext.OriginEndPoint;
if (!string.Equals(requestEndPointUrl, linkedResourceUrl, StringComparison.InvariantCultureIgnoreCase))
{
throw new RequestException("Request url and linked entry resource not matching.");
}
string resourceKindName = _requestContext.ResourceKind.ToString();
localId = entryResourceAsRequestContext.ResourceKey;
ICorrelatedResSyncInfoStore correlatedResSyncInfoStore = NorthwindAdapter.StoreLocator.GetCorrelatedResSyncStore(_requestContext.SdataContext);
CheckExisting(correlatedResSyncInfoStore, localId);
// try to get the new uuid from uuid attribute
// if this attribute is not set a new one is created
if (null == entry.UUID || entry.UUID == Guid.Empty)
{
uuid = Guid.NewGuid();
}
else
{
uuid = entry.UUID;
}
// store a new correlation entry to the sync store
ResSyncInfo newResSyncInfo = new ResSyncInfo(uuid, requestEndPointUrl, 0, string.Empty, DateTime.Now);
CorrelatedResSyncInfo newInfo = new CorrelatedResSyncInfo(localId, newResSyncInfo);
correlatedResSyncInfoStore.Add(resourceKindName, newInfo);
// If the service consumer only needs to retrieve the URL, not the actual payload,
// it may do so by adding an empty select parameter to its request:
// a) select parameter not exist -> return deep resource payload
// b) select exists and empty -> return no resource payload
// c) select exists and not empty -> return deep resource payload as we do not yet support payload filtering
// with select parameter.
string tmpValue;
// ?select
bool includeResourcePayloads = true; // default value, but check for select parameter now
if (_requestContext.SdataUri.QueryArgs.TryGetValue("select", out tmpValue))
{
if (string.IsNullOrEmpty(_requestContext.SdataUri.QueryArgs["select"]))
{
includeResourcePayloads = false;
}
}
// Create an entity wrapper if resource data should be requested. Otherwise
// leave wrapper null.
IFeedEntryEntityWrapper wrapper = null;
//if (includeResourcePayloads) //TODO: Comment this in as soon as there is a possibility to send empty payload objects
wrapper = FeedEntryWrapperFactory.Create(_requestContext.ResourceKind, _requestContext);
/* Create the response entry */
_request.Response.FeedEntry = (FeedEntry)this.BuildFeedEntryForCorrelation(newInfo, wrapper);
_request.Response.ContentType = MediaType.AtomEntry;
_request.Response.StatusCode = System.Net.HttpStatusCode.Created;
_request.Response.Protocol.SendUnknownResponseHeader("location", FeedMetadataHelpers.BuildLinkedEntryUrl(_requestContext, uuid));
}
public void Read()
{
string resourceKindName;
EntryRequestType entryRequestType; // Multi or Single
bool includeResourcePayloads;
ICorrelatedResSyncInfoStore correlatedResSyncStore;
CorrelatedResSyncInfo[] correlatedResSyncInfos;
int totalResult; // number of correlations found
PageInfo normalizedPageInfo; // normalized pageInfo -> will be used for paging, etc.
resourceKindName = _requestContext.ResourceKind.ToString();
// multi or single entry request?
entryRequestType = (String.IsNullOrEmpty(_requestContext.ResourceKey)) ? EntryRequestType.Multi : EntryRequestType.Single;
// get store to request the correlations
correlatedResSyncStore = NorthwindAdapter.StoreLocator.GetCorrelatedResSyncStore(_requestContext.SdataContext);
// receive correlated resource synchronization entries
if (entryRequestType == EntryRequestType.Multi)
{
int pageNumber = PagingHelpers.GetPageNumber(_request.Uri.StartIndex, _request.Uri.Count);
correlatedResSyncInfos = correlatedResSyncStore.GetPaged(resourceKindName, pageNumber, (int)(_request.Uri.Count ?? DEFAULT_ITEMS_PER_PAGE), out totalResult);
}
else
{
Guid uuid = (Guid)TypeDescriptor.GetConverter(typeof(Guid)).ConvertFrom(_requestContext.ResourceKey);
correlatedResSyncInfos = correlatedResSyncStore.GetByUuid(resourceKindName, new Guid[] { uuid });
totalResult = correlatedResSyncInfos.Length;
if (totalResult > 1)
{
throw new ApplicationException("More than one resource for uuid exists.");
}
if (totalResult == 0)
{
throw new RequestException("No resource found");
}
}
// If the service consumer only needs to retrieve the URL, not the actual payload,
// it may do so by adding an empty select parameter to its request:
// a) select parameter not exist -> return deep resource payload
// b) select exists and empty -> return no resource payload
// c) select exists and not empty -> return deep resource payload as we do not yet support payload filtering
// with select parameter.
string tmpValue;
// ?select
includeResourcePayloads = true; // default value, but check for select parameter now
if (_requestContext.SdataUri.QueryArgs.TryGetValue("select", out tmpValue))
{
if (string.IsNullOrEmpty(_requestContext.SdataUri.QueryArgs["select"]))
{
includeResourcePayloads = false;
}
}
if (entryRequestType == EntryRequestType.Single)
{
IFeedEntryEntityWrapper wrapper = null;
//if (includeResourcePayloads) //TODO: Comment this in as soon as there is a possibility to send empty payload objects
wrapper = FeedEntryWrapperFactory.Create(_requestContext.ResourceKind, _requestContext);
_request.Response.FeedEntry = this.BuildFeedEntryForCorrelation(correlatedResSyncInfos[0], wrapper);
_request.Response.ContentType = MediaType.AtomEntry;
}
else
{
// Create an empty feed
Feed <FeedEntry> feed = new Feed <FeedEntry>();
feed.Author = new FeedAuthor();
feed.Author.Name = "Northwind Adapter";
feed.Category = new FeedCategory("http://schemas.sage.com/sdata/categories", "collection", "Resource Collection");
DateTime updateTime = DateTime.Now;
string feedUrl = _requestContext.SdataUri.ToString(); // the url requested
string feedUrlWithoutQuery = (new Uri(feedUrl)).GetLeftPart(UriPartial.Path); // the url without query
normalizedPageInfo = PagingHelpers.Normalize(_request.Uri.StartIndex, _request.Uri.Count, totalResult);
IFeedEntryEntityWrapper wrapper = null;
//if (includeResourcePayloads) //TODO: Comment this in as soon as there is a possibility to send empty payload objects
wrapper = FeedEntryWrapperFactory.Create(_requestContext.ResourceKind, _requestContext);
// create a feed entry for each correlation.
IEnumerator <CorrelatedResSyncInfo> pagedCorrelationEnumerator = PagingHelpers.GetPagedEnumerator <CorrelatedResSyncInfo>(normalizedPageInfo, correlatedResSyncInfos);
while (pagedCorrelationEnumerator.MoveNext())
{
// Create and append a feed entry per each id
FeedEntry entry = this.BuildFeedEntryForCorrelation(pagedCorrelationEnumerator.Current, wrapper);
if (entry != null)
{
feed.Entries.Add(entry);
}
}
// set feed title
feed.Title = string.Format("{0} linked {1}", feed.Entries.Count, resourceKindName);
// set feed update
feed.Updated = updateTime;
// set id
feed.Id = feedUrl;
// add links (general)
feed.Links.AddRange(LinkFactory.CreateFeedLinks(_requestContext, feedUrl));
#region PAGING & OPENSEARCH
// add links (paging)
feed.Links.AddRange(LinkFactory.CreatePagingLinks(normalizedPageInfo, totalResult, feedUrlWithoutQuery));
/* OPENSEARCH */
feed.ItemsPerPage = normalizedPageInfo.Count;
feed.StartIndex = normalizedPageInfo.StartIndex;
feed.TotalResults = totalResult;
#endregion
_request.Response.Feed = feed;
_request.Response.ContentType = MediaType.Atom;
}
}
// Asynchronous called method
private void Execute(NorthwindConfig config, Digest targetDigest)
{
#region Declaration
SdataContext sdataContext;
SupportedResourceKinds resource;
IAppBookmarkInfoStore appBookmarkInfoStore;
ICorrelatedResSyncInfoStore correlatedResSyncInfoStore;
ISyncSyncDigestInfoStore syncDigestStore;
ISynctickProvider tickProvider;
string resourceKind;
string EndPoint;
int nexttick = 1;
Token lastToken;
Token nextToken;
Identity[] changedIdentites;
IFeedEntryEntityWrapper wrapper;
#endregion
#region init
sdataContext = _parentPerformer._requestContext.SdataContext;
resource = _parentPerformer._requestContext.ResourceKind;
resourceKind = resource.ToString();
EndPoint = _parentPerformer._requestContext.DatasetLink + resourceKind;
appBookmarkInfoStore = NorthwindAdapter.StoreLocator.GetAppBookmarkStore(sdataContext);
correlatedResSyncInfoStore = NorthwindAdapter.StoreLocator.GetCorrelatedResSyncStore(sdataContext);
syncDigestStore = NorthwindAdapter.StoreLocator.GetSyncDigestStore(sdataContext);
tickProvider = NorthwindAdapter.StoreLocator.GettickProvider(sdataContext);
wrapper = FeedEntryWrapperFactory.Create(resource, _parentPerformer._requestContext);
#endregion
#region get last token or create a new one
if (!appBookmarkInfoStore.Get <Token>(resourceKind, out lastToken))
{
lastToken = new Token();
lastToken.InitRequest = true;
}
#endregion
#region Get local identities of changed entries since last synchronisation
changedIdentites = wrapper.Entity.GetLastChanges(lastToken, config, out nextToken);
#endregion
if (resource == SupportedResourceKinds.phoneNumbers)
{
#region workaround for phones
for (int index = 0; index < changedIdentites.Length; index++)
{
string phoneid = changedIdentites[index].Id + Sage.Integration.Northwind.Application.API.Constants.PhoneIdPostfix;
string faxId = changedIdentites[index].Id + Sage.Integration.Northwind.Application.API.Constants.FaxIdPostfix;
// receive the resource payloads for the phone id and for the fax id
// so that we can calculate their current etags.
FeedEntry phoneResourcePayloadContainer = wrapper.GetFeedEntry(phoneid);
FeedEntry faxResourcePayloadConatainer = wrapper.GetFeedEntry(faxId);
string etag;
CorrelatedResSyncInfo[] correlatedResSyncInfos;
#region Phone
if (phoneResourcePayloadContainer != null)
{
// calculate etag of the resource
etag = EtagServices.ComputeEtag(phoneResourcePayloadContainer, true); // new etag
// retrieve correlations for the current identity from synch storage
correlatedResSyncInfos = correlatedResSyncInfoStore.GetByLocalId(resourceKind, new string[] { phoneid });
// if no correlation exists AND resource has been deleted:
// -> continue with next id
// else if no correlation exists:
// -> get next tick, create new correlation and add correlation to synch store
// otherwise and if the etag stored in synch store is different than etag previously calculated:
// -> get next tick, modify existing correlation and update it in synch store.
if (correlatedResSyncInfos.Length == 0 && phoneResourcePayloadContainer.IsDeleted)
{
continue;
}
else if (correlatedResSyncInfos.Length == 0)
{
nexttick = tickProvider.CreateNexttick(resourceKind); // create next tick
ResSyncInfo resyncInfo = new ResSyncInfo(Guid.NewGuid(), EndPoint, nexttick, etag, DateTime.Now);
CorrelatedResSyncInfo info = new CorrelatedResSyncInfo(phoneid, resyncInfo);
correlatedResSyncInfoStore.Put(resourceKind, info);
syncDigestStore.PersistNewer(resourceKind, info.ResSyncInfo);
}
else if (!correlatedResSyncInfos[0].ResSyncInfo.Etag.Equals(etag))
{
nexttick = tickProvider.CreateNexttick(resourceKind);
correlatedResSyncInfos[0].ResSyncInfo.Etag = etag;
correlatedResSyncInfos[0].ResSyncInfo.Tick = nexttick;
correlatedResSyncInfos[0].ResSyncInfo.EndPoint = EndPoint;
correlatedResSyncInfos[0].ResSyncInfo.ModifiedStamp = DateTime.Now;
correlatedResSyncInfoStore.Put(resourceKind, correlatedResSyncInfos[0]);
syncDigestStore.PersistNewer(resourceKind, correlatedResSyncInfos[0].ResSyncInfo);
}
}
#endregion
#region Fax
if (faxResourcePayloadConatainer != null)
{
// calculate etag of the resource
etag = EtagServices.ComputeEtag(faxResourcePayloadConatainer, true); // new etag
// retrieve correlations for the current identity from synch storage
correlatedResSyncInfos = correlatedResSyncInfoStore.GetByLocalId(resourceKind, new string[] { faxId });
// if no correlation exists AND resource has been deleted:
// -> continue with next id
// else if no correlation exists:
// -> get next tick, create new correlation and add correlation to synch store
// otherwise and if the etag stored in synch store is different than etag previously calculated:
// -> get next tick, modify existing correlation and update it in synch store.
if (correlatedResSyncInfos.Length == 0 && faxResourcePayloadConatainer.IsDeleted)
{
continue;
}
else if (correlatedResSyncInfos.Length == 0)
{
nexttick = tickProvider.CreateNexttick(resourceKind); // create next tick
ResSyncInfo resyncInfo = new ResSyncInfo(Guid.NewGuid(), EndPoint, nexttick, etag, DateTime.Now);
CorrelatedResSyncInfo info = new CorrelatedResSyncInfo(faxId, resyncInfo);
correlatedResSyncInfoStore.Put(resourceKind, info);
syncDigestStore.PersistNewer(resourceKind, info.ResSyncInfo);
}
else if (!correlatedResSyncInfos[0].ResSyncInfo.Etag.Equals(etag))
{
nexttick = tickProvider.CreateNexttick(resourceKind);
correlatedResSyncInfos[0].ResSyncInfo.Etag = etag;
correlatedResSyncInfos[0].ResSyncInfo.Tick = nexttick;
correlatedResSyncInfos[0].ResSyncInfo.EndPoint = EndPoint;
correlatedResSyncInfos[0].ResSyncInfo.ModifiedStamp = DateTime.Now;
correlatedResSyncInfoStore.Put(resourceKind, correlatedResSyncInfos[0]);
syncDigestStore.PersistNewer(resourceKind, correlatedResSyncInfos[0].ResSyncInfo);
}
}
#endregion
}
#endregion
}
else
{
string id;
FeedEntry resourcePayloadContainer;
CorrelatedResSyncInfo[] correlatedResSyncInfos;
string etag;
// iterate through the collection of ids of all changed resources.
for (int index = 0; index < changedIdentites.Length; index++)
{
// current id from iterated collection
id = changedIdentites[index].Id;
// get resource payload container for the current identity so that we can calculated the
// etag.
// continue with next identity if no resource was found.
resourcePayloadContainer = wrapper.GetFeedEntry(id);
// calculate etag of the current resource payload
etag = EtagServices.ComputeEtag(resourcePayloadContainer, true);
// retrieve correlations for the current identity from synch storage
correlatedResSyncInfos = correlatedResSyncInfoStore.GetByLocalId(resourceKind, new string[] { id });
// if no correlation exists AND resource has been deleted:
// -> continue with next id
// else if no correlation exists:
// -> get next tick, create new correlation and add correlation to synch store
// otherwise and if the etag stored in synch store is different than etag previously calculated:
// -> get next tick, modify existing correlation and update it in synch store.
if (resourcePayloadContainer == null || (correlatedResSyncInfos.Length == 0 && resourcePayloadContainer.IsDeleted))
{
continue;
}
else if (correlatedResSyncInfos.Length == 0)
{
nexttick = tickProvider.CreateNexttick(resourceKind); // create next tick
ResSyncInfo resyncInfo = new ResSyncInfo(Guid.NewGuid(), EndPoint, nexttick, etag, DateTime.Now);
CorrelatedResSyncInfo info = new CorrelatedResSyncInfo(id, resyncInfo);
correlatedResSyncInfoStore.Put(resourceKind, info);
syncDigestStore.PersistNewer(resourceKind, info.ResSyncInfo);
}
else if (!correlatedResSyncInfos[0].ResSyncInfo.Etag.Equals(etag))
{
nexttick = tickProvider.CreateNexttick(resourceKind);
correlatedResSyncInfos[0].ResSyncInfo.Etag = etag;
correlatedResSyncInfos[0].ResSyncInfo.Tick = nexttick;
correlatedResSyncInfos[0].ResSyncInfo.EndPoint = EndPoint;
correlatedResSyncInfos[0].ResSyncInfo.ModifiedStamp = DateTime.Now;
correlatedResSyncInfoStore.Put(resourceKind, correlatedResSyncInfos[0]);
syncDigestStore.PersistNewer(resourceKind, correlatedResSyncInfos[0].ResSyncInfo);
}
}
}
#region store next token
appBookmarkInfoStore.Put(resourceKind, nextToken);
#endregion
// set tracking phase
lock (_parentPerformer._asyncStateObj)
{
_parentPerformer._asyncStateObj.Tracking.Phase = TrackingPhase.GETCHANGESBYtick;
}
if (null != targetDigest)
{
ICorrelatedResSyncInfoEnumerator enumerator;
List <string> EndPoints = new List <string>();
#warning remove this workaround
if (targetDigest.Entries != null)
{
foreach (DigestEntry targetDigestEntry in targetDigest.Entries)
{
EndPoints.Add(targetDigestEntry.EndPoint);
enumerator = correlatedResSyncInfoStore.GetSincetick(resourceKind, targetDigestEntry.EndPoint, ((int)targetDigestEntry.Tick) - 1);
while (enumerator.MoveNext())
{
// No lock needed, as we expect that CorrelatedResSyncInfos list is
// only acceeded anywhere else when Tracking phase is 'finish'.
//lock(_parentPerformer._asyncStateObj)
//{
_parentPerformer._asyncStateObj.CorrelatedResSyncInfos.Add(enumerator.Current);
//}
}
}
}
SyncDigestInfo sourceSyncDigestInfo = syncDigestStore.Get(resourceKind);
foreach (SyncDigestEntryInfo digestEntry in sourceSyncDigestInfo)
{
if (EndPoints.Contains(digestEntry.EndPoint))
{
continue;
}
EndPoints.Add(digestEntry.EndPoint);
enumerator = correlatedResSyncInfoStore.GetSincetick(resourceKind, digestEntry.EndPoint, -1);
while (enumerator.MoveNext())
{
// No lock needed, as we expect that CorrelatedResSyncInfos list is
// only acceeded anywhere else when Tracking phase is 'finish'.
//lock(_parentPerformer._asyncStateObj)
//{
_parentPerformer._asyncStateObj.CorrelatedResSyncInfos.Add(enumerator.Current);
//}
}
}
if (!EndPoints.Contains(EndPoint))
{
enumerator = correlatedResSyncInfoStore.GetSincetick(resourceKind, EndPoint, -1);
while (enumerator.MoveNext())
{
// No lock needed, as we expect that CorrelatedResSyncInfos list is
// only acceeded anywhere else when Tracking phase is 'finish'.
//lock(_parentPerformer._asyncStateObj)
//{
_parentPerformer._asyncStateObj.CorrelatedResSyncInfos.Add(enumerator.Current);
//}
}
}
}
// Set tracking phase to FINISH
lock (_parentPerformer._asyncStateObj.Tracking)
{
_parentPerformer._asyncStateObj.Tracking.Phase = TrackingPhase.FINISH;
}
}
/// <summary>
///
/// </summary>
/// <param name="config"></param>
/// <returns></returns>
/// <remarks>This method is not threadsafe as the performer must be finished when calling this method.</remarks>
public Feed <FeedEntry> GetFeed(NorthwindConfig config, PageInfo normalizedPageInfo)
{
Feed <FeedEntry> syncSourceFeed;
SdataContext sdataContext;
SupportedResourceKinds resource;
string resourceKind;
string EndPoint;
Guid trackingId;
List <CorrelatedResSyncInfo> correlatedResSyncInfos;
sdataContext = _parentPerformer._requestContext.SdataContext;
resource = _parentPerformer._requestContext.ResourceKind;
resourceKind = resource.ToString();
correlatedResSyncInfos = _parentPerformer._asyncStateObj.CorrelatedResSyncInfos;
EndPoint = _parentPerformer._requestContext.DatasetLink + resourceKind;
trackingId = _parentPerformer._requestContext.TrackingId;
//ISyncSyncDigestInfoStore syncDigestStore = RequestReceiver.NorthwindAdapter.StoreLocator.GetSyncDigestStore(sdataContext);
ISyncSyncDigestInfoStore syncDigestStore = NorthwindAdapter.StoreLocator.GetSyncDigestStore(sdataContext);
SyncDigestInfo syncDigestInfo = syncDigestStore.Get(resourceKind);
// Create a new Feed instance
syncSourceFeed = new Feed <FeedEntry>();//FeedComponentFactory.Create<ISyncSourceFeed>();
syncSourceFeed.Author = new FeedAuthor();
syncSourceFeed.Author.Name = "Northwind Adapter";
syncSourceFeed.Category = new FeedCategory("http://schemas.sage.com/sdata/categories", "collection", "Resource Collection");
#region Digest
syncSourceFeed.Digest = new Digest();
syncSourceFeed.Digest.Entries = (syncDigestInfo == null) ? new DigestEntry[0] : new DigestEntry[syncDigestInfo.Count];
// set digest origin
syncSourceFeed.Digest.Origin = _parentPerformer._requestContext.OriginEndPoint;
if (syncDigestInfo != null)
{
// convert and set digest entries from synch store object to feed object
for (int i = 0; i < syncDigestInfo.Count; i++)
{
syncSourceFeed.Digest.Entries[i] = new DigestEntry();
syncSourceFeed.Digest.Entries[i].ConflictPriority = syncDigestInfo[i].ConflictPriority;
syncSourceFeed.Digest.Entries[i].EndPoint = syncDigestInfo[i].EndPoint;
syncSourceFeed.Digest.Entries[i].Tick = (int)syncDigestInfo[i].Tick;
syncSourceFeed.Digest.Entries[i].Stamp = DateTime.Now;
}
}
#endregion
#region Entries
// retrieve the data connection wrapper
IFeedEntryEntityWrapper wrapper = FeedEntryWrapperFactory.Create(resource, _parentPerformer._requestContext);
IEnumerator <CorrelatedResSyncInfo> correlationEnumerator = PagingHelpers.GetPagedEnumerator <CorrelatedResSyncInfo>(normalizedPageInfo, correlatedResSyncInfos.ToArray());
while (correlationEnumerator.MoveNext())
{
syncSourceFeed.Entries.Add(this.BuildFeedEntry(correlationEnumerator.Current, wrapper));
}
#endregion
// initialize the feed
string feedUrl = string.Format("{0}/$syncSource('{1}')", EndPoint, trackingId);
string feedUrlWithoutQuery = (new Uri(feedUrl)).GetLeftPart(UriPartial.Path); // the url without query
// set id tag
syncSourceFeed.Id = feedUrl;
// set title tag
syncSourceFeed.Title = string.Format("{0} synchronization source feed {1}", resourceKind.ToString(), trackingId);
// set update
// syncSourceFeed.Updated = DateTime.Now;
// set syncMode
syncSourceFeed.SyncMode = SyncMode.catchUp;// syncModeenum.catchUp;
// add links (general)
syncSourceFeed.Links.AddRange(LinkFactory.CreateFeedLinks(_parentPerformer._requestContext, feedUrl));
#region PAGING & OPENSEARCH
// add links (paging)
syncSourceFeed.Links.AddRange(LinkFactory.CreatePagingLinks(normalizedPageInfo, correlatedResSyncInfos.Count, feedUrlWithoutQuery));
/* OPENSEARCH */
syncSourceFeed.ItemsPerPage = normalizedPageInfo.Count;
syncSourceFeed.StartIndex = normalizedPageInfo.StartIndex;
syncSourceFeed.TotalResults = correlatedResSyncInfos.Count;
#endregion
return(syncSourceFeed);
}
// Asynchronous called method
private void Execute(NorthwindConfig config, IFeed feed, Digest sourceDigest)
{
#region Declarations
SdataContext sdataContext;
SupportedResourceKinds resource;
IAppBookmarkInfoStore appBookmarkInfoStore;
ICorrelatedResSyncInfoStore correlatedResSyncInfoStore;
ISyncSyncDigestInfoStore syncDigestStore;
GuidConverter guidConverter = new GuidConverter();
string resourceKind;
string EndPoint;
//Digest sourceDigest;
SyncDigestInfo targetDigest;
IFeedEntryEntityWrapper wrapper;
#endregion
#region init
sdataContext = _parentPerformer._requestContext.SdataContext;
resource = _parentPerformer._requestContext.ResourceKind;
resourceKind = resource.ToString();
EndPoint = _parentPerformer._requestContext.DatasetLink + resourceKind;
appBookmarkInfoStore = NorthwindAdapter.StoreLocator.GetAppBookmarkStore(sdataContext);
correlatedResSyncInfoStore = NorthwindAdapter.StoreLocator.GetCorrelatedResSyncStore(sdataContext);
syncDigestStore = NorthwindAdapter.StoreLocator.GetSyncDigestStore(sdataContext);
//#warning implement this
//sourceDigest = new Digest();
//sourceDigest = ((Feed<FeedEntry>)feed).Digest;
targetDigest = syncDigestStore.Get(resourceKind);
wrapper = FeedEntryWrapperFactory.Create(resource, _parentPerformer._requestContext);
#endregion
#region process entries
bool sourceIsDeleteMode;
SdataTransactionResult sdTrResult;
SyncState sourceState;
SyncState targetState;
foreach (FeedEntry entry in feed.Entries)
{
sdTrResult = null;
try
{
// Check whether the source entry had been deleted.
// if not we expect a payload!
// The variable 'sourceIsDeleteMode' holds the result of this check for later calls.
if (entry.IsDeleted)
{
sourceIsDeleteMode = true;
}
/*else if (null == entry.Payload)
* throw new Exception("Payload missing.");*/
else
{
sourceIsDeleteMode = false;
}
// get the source syncstate
sourceState = entry.SyncState;
string uuidString = entry.UUID.ToString();
Guid uuid = entry.UUID;
// Look into the store to get all correlations of the uuid received from source
CorrelatedResSyncInfo[] corelations = correlatedResSyncInfoStore.GetByUuid(resourceKind, new Guid[] { uuid });
if (corelations.Length == 0)
{
if (sourceIsDeleteMode)
{
// the source entry had been deleted and no correlation exists for this
// entry in the target.
// So we do nothing here.
sdTrResult = new SdataTransactionResult();
sdTrResult.HttpStatus = HttpStatusCode.OK;
sdTrResult.HttpMessage = "OK";
sdTrResult.HttpMethod = HttpMethod.DELETE;
sdTrResult.ResourceKind = resource;
sdTrResult.Uuid = uuidString;
}
else
{
// no target entry exists for the updated or added source entry.
// So we add the source entry to the application and add a new correlation to the sync store.
// If this operation fails we will have to set the result state to conflict.
try
{
// add the entry to application
sdTrResult = wrapper.Add(entry);
if ((sdTrResult != null) && ((sdTrResult.HttpStatus == HttpStatusCode.OK) || (sdTrResult.HttpStatus == HttpStatusCode.Created)))
{
string etag = EtagServices.ComputeEtag(entry, true);
ResSyncInfo resSyncInfo =
new ResSyncInfo(uuid, entry.SyncState.EndPoint,
(entry.SyncState.Tick > 0) ? entry.SyncState.Tick : 1, etag, entry.SyncState.Stamp);
CorrelatedResSyncInfo correlatedResSyncInfo = new CorrelatedResSyncInfo(sdTrResult.LocalId, resSyncInfo);
// store the new correlation to the sync store
correlatedResSyncInfoStore.Put(resourceKind, correlatedResSyncInfo);
// update the sync digest entry if the tick of the source entry is newer than the actual tick of the target.
syncDigestStore.PersistNewer(resourceKind, correlatedResSyncInfo.ResSyncInfo);
}
}
catch (Exception e)
{
// in case of an unexpected error while adding a new entry to target
// we create a transaction result with the state 'Conflict'
sdTrResult = new SdataTransactionResult();
sdTrResult.HttpStatus = HttpStatusCode.Conflict;
sdTrResult.HttpMethod = HttpMethod.POST;
sdTrResult.HttpMessage = e.ToString();
sdTrResult.ResourceKind = resource;
sdTrResult.Uuid = uuidString;
}
}
}
else
{
string key = corelations[0].LocalId;
// a correlation was found for the source entry.
#region update or delete
try
{
bool doUpdate = false;
//bool doDelete = false;
bool isConflict = true;
// set the Key from correlation to the entry.Payload.Key property
// only if source had not been deleted.
if (!sourceIsDeleteMode)
{
entry.Key = corelations[0].LocalId;
}
targetState = Helper.GetSyncState(corelations[0]);
//If sourceState.EndPoint = targetState.EndPoint,
//there is no conflict and the update must be applied
//if sourceState.Tick > targetState.tick.
if (targetState.EndPoint.Equals(sourceState.EndPoint, StringComparison.InvariantCultureIgnoreCase))
{
isConflict = false;
if (sourceState.Tick > targetState.Tick)
{
//if (!sourceIsDeleteMode)
doUpdate = true;
//else
// doDelete = true;
}
}
else
{
SyncState sourceDigestSyncState = Helper.GetSyncState(sourceDigest, targetState.EndPoint);;
SyncState targetDigestSyncState = Helper.GetSyncState(targetDigest, sourceState.EndPoint);
//If targetState is contained in sourceDigest,
//i.e. if sourceDigest has a digest entry E such that E.EndPoint = targetState.EndPoint
//and E.Tick >= targetState.Tick, there is no conflict and the update must be applied.
if (sourceDigestSyncState != null)
{
if (sourceDigestSyncState.Tick > targetState.Tick)
{
doUpdate = true;
isConflict = false;
}
}
//If sourceState is contained in targetDigest,
//i.e. if targetDigest has a digest entry E such that E.EndPoint = sourceState.EndPoint
//and E.Tick >= sourceState.Tick, there is no conflict and the update must be ignored
//(target has the most recent version).
if (targetDigestSyncState != null)
{
if (targetDigestSyncState.Tick > sourceState.Tick)
{
doUpdate = false;
isConflict = false;
}
}
//Otherwise (targetState not contained in sourceDigest, sourceState not contained in targetDigest),
//there is a conflict.
if ((sourceDigestSyncState == null) && (targetDigestSyncState == null))
{
isConflict = true;
}
}
//****************** Conflict ****************
//In case of conflict, the target EndPoint uses the following algorithm to resolve the conflict:
//Let sourceEntry be the sourceDigest digest entry such that sourceEntry.EndPoint = sourceState.EndPoint.
//Let targetEntry be the targetDigest digest entry such that targetEntry.EndPoint = targetState.EndPoint.
//If sourceEntry .conflictPriority <> targetEntry .conflictPriority, the side with lowest priority wins.
if (isConflict)
{
int sourceConflictPriority = Helper.GetConflictPriority(sourceDigest, sourceState.EndPoint);
int targetConflictPriority = Helper.GetConflictPriority(targetDigest, targetState.EndPoint);
if (sourceConflictPriority > targetConflictPriority)
{
doUpdate = true;
}
else if (sourceConflictPriority < targetConflictPriority)
{
doUpdate = false;
}
else
{
//Otherwise (sourceEntry .conflictPriority = targetEntry .conflictPriority),
//then sourceState.stamp and targetState.stamp are compared
//and the entry with the most recent timestamp wins.
if (sourceState.Stamp > targetState.Stamp)
{
doUpdate = true;
}
}
}
ResSyncInfo resSyncInfo =
new ResSyncInfo(uuid, entry.SyncState.EndPoint,
(entry.SyncState.Tick > 0)?entry.SyncState.Tick:1, "", entry.SyncState.Stamp);
if (doUpdate && !sourceIsDeleteMode)
{
// update the entry in the application and update the sync store
sdTrResult = wrapper.Update(entry);
if ((sdTrResult != null) && (sdTrResult.HttpStatus == HttpStatusCode.OK))
{
string etag = EtagServices.ComputeEtag(entry, true);
resSyncInfo =
new ResSyncInfo(uuid, entry.SyncState.EndPoint,
(entry.SyncState.Tick > 0) ? entry.SyncState.Tick : 1, etag, entry.SyncState.Stamp);
CorrelatedResSyncInfo correlatedResSyncInfo = new CorrelatedResSyncInfo(sdTrResult.LocalId, resSyncInfo);
correlatedResSyncInfoStore.Put(resourceKind, correlatedResSyncInfo);
}
}
else if (!doUpdate && !sourceIsDeleteMode)
{
sdTrResult = new SdataTransactionResult();
sdTrResult.HttpStatus = HttpStatusCode.Conflict;
sdTrResult.HttpMethod = HttpMethod.PUT;
sdTrResult.HttpMessage = "";
sdTrResult.ResourceKind = resource;
sdTrResult.Uuid = uuidString;
sdTrResult.LocalId = key;
}
else if (doUpdate && sourceIsDeleteMode)
{
// delete the entry in the application and update the sync store
// we do not support nested deletion. So only TradingAccounts and SalesOrders can be deleted.
if (resource == SupportedResourceKinds.tradingAccounts ||
resource == SupportedResourceKinds.salesOrders)
{
sdTrResult = wrapper.Delete(corelations[0].LocalId);
if ((sdTrResult != null) && (sdTrResult.HttpStatus == HttpStatusCode.OK))
{
correlatedResSyncInfoStore.Delete(resource.ToString(), corelations[0].ResSyncInfo.Uuid);
}
}
else
{
// this does not correspond to real fact, what we did at target side!
sdTrResult = new SdataTransactionResult();
sdTrResult.HttpStatus = HttpStatusCode.OK;
sdTrResult.HttpMessage = "OK";
sdTrResult.HttpMethod = HttpMethod.DELETE;
sdTrResult.ResourceKind = resource;
sdTrResult.Uuid = uuidString;
sdTrResult.LocalId = key;
}
}
else
{
sdTrResult = new SdataTransactionResult();
sdTrResult.HttpStatus = HttpStatusCode.Conflict;
sdTrResult.HttpMessage = "";
sdTrResult.HttpMethod = HttpMethod.DELETE;
sdTrResult.ResourceKind = resource;
sdTrResult.Uuid = uuidString;
sdTrResult.LocalId = key;
}
syncDigestStore.PersistNewer(resourceKind, resSyncInfo);
}
catch (Exception e)
{
sdTrResult = new SdataTransactionResult();
sdTrResult.HttpStatus = HttpStatusCode.Conflict;
sdTrResult.HttpMethod = HttpMethod.PUT;
sdTrResult.HttpMessage = e.ToString();
sdTrResult.ResourceKind = resource;
sdTrResult.Uuid = uuidString;
sdTrResult.LocalId = key;
}
#endregion
}
}
catch (Exception e)
{
sdTrResult = new SdataTransactionResult();
sdTrResult.HttpStatus = HttpStatusCode.Conflict;
sdTrResult.HttpMessage = e.ToString();
sdTrResult.ResourceKind = resource;
//sdTrResult.Uuid = entry.Payload.PayloadContainer.Uuid;
}
#region store transaction result
if (sdTrResult != null)
{
lock (_parentPerformer._asyncStateObj)
{
this._parentPerformer._asyncStateObj.TransactionResults.Add(sdTrResult);
}
}
#endregion
}
#endregion
// Set tracking phase
lock (_parentPerformer._asyncStateObj.Tracking)
{
_parentPerformer._asyncStateObj.Tracking.Phase = TrackingPhase.FINISH;
}
}
/// <summary>
///
/// </summary>
/// <param name="config"></param>
/// <returns></returns>
/// <remarks>This method is not threadsafe as the performer must be finished when calling this method.</remarks>
public Feed <FeedEntry> GetFeed(NorthwindConfig config, PageInfo normalizedPageInfo)
{
Feed <FeedEntry> syncTargetFeed = new Feed <FeedEntry>();
syncTargetFeed.Author = new FeedAuthor();
syncTargetFeed.Author.Name = "Northwind Adapter";
syncTargetFeed.Category = new FeedCategory("http://schemas.sage.com/sdata/categories", "collection", "Resource Collection");
SdataContext sdataContext;
SupportedResourceKinds resource;
string resourceKind;
string EndPoint;
Guid trackingId;
List <SdataTransactionResult> transactinResults;
sdataContext = _parentPerformer._requestContext.SdataContext;
resource = _parentPerformer._requestContext.ResourceKind;
resourceKind = resource.ToString();
transactinResults = _parentPerformer._asyncStateObj.TransactionResults;
EndPoint = _parentPerformer._requestContext.DatasetLink + resourceKind;;
trackingId = _parentPerformer._requestContext.TrackingId;
// Create a new Feed instance
// retrieve the data connection wrapper
IFeedEntryEntityWrapper wrapper = FeedEntryWrapperFactory.Create(resource, _parentPerformer._requestContext);
IEnumerator <SdataTransactionResult> transactionResultEnumerator = PagingHelpers.GetPagedEnumerator <SdataTransactionResult>(normalizedPageInfo, transactinResults.ToArray());
while (transactionResultEnumerator.MoveNext())
{
syncTargetFeed.Entries.Add(this.BuildFeedEntry(transactionResultEnumerator.Current, wrapper));
}
// initialize the feed
string feedUrl = string.Format("{0}/$syncTarget('{1}')", EndPoint, trackingId);
string feedUrlWithoutQuery = (new Uri(feedUrl)).GetLeftPart(UriPartial.Path); // the url without query
// set id tag
syncTargetFeed.Id = feedUrl;
// set title tag
syncTargetFeed.Title = string.Format("{0} synchronization target feed {1}", resourceKind.ToString(), trackingId);
// set update
#warning implement this
//syncTargetFeed.Updated = DateTime.Now;
// set syncMode
syncTargetFeed.SyncMode = SyncMode.catchUp;
// add links (general)
syncTargetFeed.Links.AddRange(LinkFactory.CreateFeedLinks(_parentPerformer._requestContext, feedUrl));
#region PAGING & OPENSEARCH
// add links (paging)
syncTargetFeed.Links.AddRange(LinkFactory.CreatePagingLinks(normalizedPageInfo, transactinResults.Count, feedUrlWithoutQuery));
/* OPENSEARCH */
syncTargetFeed.ItemsPerPage = normalizedPageInfo.Count;
syncTargetFeed.StartIndex = normalizedPageInfo.StartIndex;
syncTargetFeed.TotalResults = transactinResults.Count;
#endregion
return(syncTargetFeed);
}