Exemple #1
0
        public async Task <SimplifiedSchema> GetSchema(int Page = 0, string AccessToken = null, List <ResourcePath> Resources = null)
        {
            const int MaxResources = 500;

            TaskCompletionSource <StanzaIQ> Signal = new TaskCompletionSource <StanzaIQ>();

            StanzaIQ Request = new StanzaIQ(StanzaIQ.StanzaIQType.Get);

            Request.To = DataSourceAddress;
            XElement Payload = new XElement(LWTSD.Namespace + "read-schema");

            Payload.SetAttributeValue("format", SchemaFormat.Simplified.GetSerializedValue());
            Payload.SetAttributeValue("startindex", Page * MaxResources);
            Payload.SetAttributeValue("maxresources", MaxResources);

            if (AccessToken != null)
            {
                XElement AToken = new XElement(LWTSD.Namespace + "accesstoken");
                AToken.SetAttributeValue("name", "urn:clayster:cdo:sessionid");
                AToken.Value = AccessToken;
                Payload.Add(AToken);
            }

            if (Resources != null)
            {
                foreach (var res in Resources)
                {
                    XElement Resource = new XElement(LWTSD.Namespace + "resource");
                    Resource.SetAttributeValue("path", res);
                    Payload.Add(Resource);
                }
            }

            Request.Payload.Add(Payload);
            IQRequests[Request.ID] = Signal;

            Uplink.SendStanza(Request);

            await Signal.Task;

            // Parse signal data

            if (Signal.Task.Result == null)
            {
                throw new Exception("Failed to get schema");
            }

            XElement ReturnedData = Signal.Task.Result.Payload.Element(LWTSD.Namespace + "simplified-schema");

            if (ReturnedData == null)
            {
                throw new Exception("Failed to get schema");
            }

            SimplifiedSchema RVal = new SimplifiedSchema(ReturnedData);

            return(RVal);
        }
Exemple #2
0
        public async Task <Tuple <string, DataPage> > SubscribeToData(SimplifiedSchema KnownSchema,
                                                                      List <ResourcePath> Resources,
                                                                      Action <Tuple <string, DataPage> > NewDataAction,
                                                                      Action <string> SubscriptionCancelled,
                                                                      string AccessToken = null)
        {
            string SubscriptionID = Guid.NewGuid().ToString();

            XElement Payload = new XElement(LWTSD.Namespace + "subscribe");

            Payload.SetAttributeValue("subscriptionid", SubscriptionID);

            foreach (ResourcePath res in Resources)
            {
                XElement Trigger = new XElement(LWTSD.Namespace + "trigger");
                Trigger.SetAttributeValue("onresource", res);
                Payload.Add(Trigger);
            }
            StanzaIQ Request = new StanzaIQ(StanzaIQ.StanzaIQType.Set);

            Request.To = DataSourceAddress;

            Subscription NewSubscription = new Subscription();

            NewSubscription.ID      = SubscriptionID;
            NewSubscription.NewData = NewDataAction;

            TaskCompletionSource <StanzaIQ> Signal = new TaskCompletionSource <StanzaIQ>();

            Request.Payload.Add(Payload);
            IQRequests[Request.ID] = Signal;

            Uplink.SendStanza(Request);

            await Signal.Task;

            if (Signal.Task.Result == null)
            {
                throw new Exception("Failed to subscribe: no data");
            }
            if (Signal.Task.Result.IQType != StanzaIQ.StanzaIQType.Result)
            {
                throw new Exception("Subscription failed");
            }


            DataPage Page = await ReadData(KnownSchema, Resources, AccessToken);

            NewSubscription.KnownSchema           = Page.Schema;
            NewSubscription.Resources             = Resources;
            NewSubscription.AccessToken           = AccessToken;
            NewSubscription.SubscriptionCancelled = SubscriptionCancelled;

            Subscriptions[NewSubscription.ID] = NewSubscription;

            return(new Tuple <string, DataPage>(SubscriptionID, Page));
        }
Exemple #3
0
        public async Task <DataPage> ReadData(SimplifiedSchema KnownSchema,
                                              List <ResourcePath> Resources,
                                              string AccessToken = null,
                                              int Page           = 0)
        {
            const int NrSchemaMissMatchRetries = 10;
            bool      SchemaMissMatched        = true;

            for (int i = 0; i < NrSchemaMissMatchRetries && SchemaMissMatched; i++)
            {
                SchemaMissMatched = false;
                try
                {
                    return(await InnerReadData(KnownSchema, Resources, Page, new List <string>(), AccessToken));
                }
                catch (DataPage.SchemaMissMatchException)
                {
                    SchemaMissMatched = true;
                }
            }
            throw new Exception("Failed to read data" + (SchemaMissMatched ? ": schema miss matched" : ""));
        }
Exemple #4
0
        async Task <DataPage> InnerReadData(SimplifiedSchema KnownSchema,
                                            List <ResourcePath> Resources,
                                            int Page = 0,
                                            List <string> ResubscriptionIDs = null,
                                            string AccessToken = null)
        {
            if (KnownSchema == null)
            {
                KnownSchema = await GetSchema(0, AccessToken, Resources);
            }

            TaskCompletionSource <StanzaIQ> Signal = new TaskCompletionSource <StanzaIQ>();

            StanzaIQ Request = new StanzaIQ(StanzaIQ.StanzaIQType.Get);

            Request.To = DataSourceAddress;
            XElement Payload = new XElement(LWTSD.Namespace + "read-data");

            Payload.SetAttributeValue("maxpoints", DataPage.PointsPerPage.ToString());
            Payload.SetAttributeValue("startindex", (Page * DataPage.PointsPerPage).ToString());
            Payload.SetAttributeValue("relativetimeout", "10");

            if (AccessToken != null)
            {
                XElement AToken = new XElement(LWTSD.Namespace + "accesstoken");
                AToken.SetAttributeValue("name", "urn:clayster:cdo:sessionid");
                AToken.Value = AccessToken;
                Payload.Add(AToken);
            }

            if (ResubscriptionIDs != null)
            {
                foreach (string sid in ResubscriptionIDs)
                {
                    XElement el = new XElement(LWTSD.Namespace + "re-subscribe");
                    el.SetAttributeValue("subscriptionid", sid);
                    Payload.Add(el);
                }
            }

            foreach (ResourcePath Path in Resources)
            {
                XElement el = new XElement(LWTSD.Namespace + "read");
                el.SetAttributeValue("resource-path", Path);
                el.SetAttributeValue("maxpoints", "1");
                Payload.Add(el);
            }

            Request.Payload.Add(Payload);
            IQRequests[Request.ID] = Signal;

            Uplink.SendStanza(Request);

            await Signal.Task;

            // Parse signal data

            if (Signal.Task.Result == null)
            {
                throw new Exception("Failed to get data: no return value");
            }

            XElement ReturnedData = Signal.Task.Result.Payload.Element(LWTSD.Namespace + "data");

            if (ReturnedData == null)
            {
                throw new Exception("Failed to get data: invalid data: " + Signal.Task.Result.Payload.ToString());
            }


            // This is wrong for more than one or two iterations, Need to re-read the data. Recurse?
            DataPage RVal = new DataPage(ReturnedData, KnownSchema, Page);

            return(RVal);
        }
Exemple #5
0
 public DataPage()
 {
     Page         = 0;
     NrTotalPages = 1;
     Schema       = null;
 }
Exemple #6
0
            public DataPage(XElement Element, SimplifiedSchema KnownSchema, int Page)
            {
                if (KnownSchema == null)
                {
                    throw new SchemaMissMatchException();
                }

                string NewSchemaVersion = Element.Attribute("schemaversion").Value;

                if (NewSchemaVersion != KnownSchema.GetVersion())
                {
                    throw new SchemaMissMatchException();
                }

                Schema            = KnownSchema;
                this.NrTotalPages = (int)(((double)Convert.ToInt32(Element.Attribute("totalpoints").Value) + 0.5) / (double)PointsPerPage);


                foreach (var it in Element.Elements(LWTSD.Namespace + "resource"))
                {
                    ResourcePath Path = it.Attribute("path").Value;
                    switch (KnownSchema.Resources[Path].SimpleType)
                    {
                    case SimplifiedType.String:
                        Data.Add(new ResourceString(it));
                        break;

                    case SimplifiedType.Integer:
                        Data.Add(new ResourceInteger(it));
                        break;

                    case SimplifiedType.Base64Binary:
                        Data.Add(new ResourceBase64Binary(it));
                        break;

                    case SimplifiedType.DateTime:
                        Data.Add(new ResourceDateTime(it));
                        break;

                    case SimplifiedType.Boolean:
                        Data.Add(new ResourceBoolean(it));
                        break;

                    case SimplifiedType.Decimal:
                        Data.Add(new ResourceDecimal(it));
                        break;

                    case SimplifiedType.Duration:
                        Data.Add(new ResourceDuration(it));
                        break;

                    case SimplifiedType.Float:
                        Data.Add(new ResourceFloat(it));
                        break;

                    case SimplifiedType.Time:
                        Data.Add(new ResourceTime(it));
                        break;

                    case SimplifiedType.Double:
                        Data.Add(new ResourceDouble(it));
                        break;
                    }
                }
            }