C# QueueContinuationToken类代码示例

 public Task<QueueResultSegment> ListQueuesSegmentedAsync(string prefix, QueueContinuationToken currentToken)
 {
     return this.ListQueuesSegmentedAsync(prefix, currentToken, CancellationToken.None);
 }

 /// <summary>
 /// Begins an asynchronous operation to return a result segment containing a collection of queue items.
 /// </summary>
 /// <param name="prefix">The queue name prefix.</param>
 /// <param name="currentToken">A <see cref="QueueContinuationToken"/> returned by a previous listing operation.</param>
 /// <param name="callback">The callback delegate that will receive notification when the asynchronous operation completes.</param>
 /// <param name="state">A user-defined object that will be passed to the callback delegate.</param>
 /// <returns>An <see cref="ICancellableAsyncResult"/> that references the asynchronous operation.</returns>
 public ICancellableAsyncResult BeginListQueuesSegmented(string prefix, QueueContinuationToken currentToken, AsyncCallback callback, object state)
 {
     return this.BeginListQueuesSegmented(prefix, QueueListingDetails.None, null, currentToken, null, null, callback, state);
 }

 /// <summary>
 /// Returns a result segment containing a collection of queues.
 /// </summary>
 /// <param name="currentToken">A <see cref="QueueContinuationToken"/> token returned by a previous listing operation.</param>
 /// <returns>A result segment of queues.</returns>
 public IAsyncOperation<QueueResultSegment> ListQueuesSegmentedAsync(QueueContinuationToken currentToken)
 {
     return this.ListQueuesSegmentedAsync(null, QueueListingDetails.None, 0, currentToken, null);
 }

        /// <summary>
        /// Returns a result segment containing a collection of queues.
        /// </summary>
        /// <param name="currentToken">A <see cref="QueueContinuationToken"/> token returned by a previous listing operation.</param>
        /// <returns>A result segment of queues.</returns>
#if ASPNET_K || PORTABLE 
        public Task<QueueResultSegment> ListQueuesSegmentedAsync(QueueContinuationToken currentToken)

 internal QueueResultSegment(IEnumerable<CloudQueue> queues, QueueContinuationToken continuationToken)
 {
     this.Results = queues;
     this.ContinuationToken = continuationToken;
 }

 /// <summary>
 /// Returns a result segment containing a collection of queues.
 /// </summary>
 /// <param name="currentToken">A <see cref="QueueContinuationToken"/> continuation token returned by a previous listing operation.</param>
 /// <returns>A <see cref="QueueResultSegment"/> object.</returns>
 public virtual QueueResultSegment ListQueuesSegmented(QueueContinuationToken currentToken)
 {
     return this.ListQueuesSegmented(null, QueueListingDetails.None, null, currentToken, null, null);
 }

 public virtual Task<QueueResultSegment> ListQueuesSegmentedAsync(QueueContinuationToken currentToken)
 {
     return this.ListQueuesSegmentedAsync(currentToken, CancellationToken.None);
 }

        public void QueueContinuationTokenVerifySerializer()
        {
            XmlSerializer serializer = new XmlSerializer(typeof(QueueContinuationToken));

            XmlWriterSettings settings = new XmlWriterSettings();
            settings.Indent = true;

            StringReader reader;
            string tokenxml;

            QueueContinuationToken writeToken = new QueueContinuationToken
            {
                NextMarker = Guid.NewGuid().ToString(),
                TargetLocation = StorageLocation.Primary
            };

            QueueContinuationToken readToken = null;

            // Write with XmlSerializer
            using (StringWriter writer = new StringWriter())
            {
                serializer.Serialize(writer, writeToken);
                tokenxml = writer.ToString();
            }

            // Read with XmlSerializer
            reader = new StringReader(tokenxml);
            readToken = (QueueContinuationToken)serializer.Deserialize(reader);
            Assert.AreEqual(writeToken.NextMarker, readToken.NextMarker);

            // Read with token.ReadXml()
            using (XmlReader xmlReader = XmlReader.Create(new StringReader(tokenxml)))
            {
                readToken = new QueueContinuationToken();
                readToken.ReadXml(xmlReader);
            }
            Assert.AreEqual(writeToken.NextMarker, readToken.NextMarker);

            // Read with token.ReadXml()
            using (XmlReader xmlReader = XmlReader.Create(new StringReader(tokenxml)))
            {
                readToken = new QueueContinuationToken();
                readToken.ReadXml(xmlReader);
            }

            // Write with token.WriteXml
            StringBuilder sb = new StringBuilder();
            using (XmlWriter writer = XmlWriter.Create(sb, settings))
            {
                writeToken.WriteXml(writer);
            }

            // Read with XmlSerializer
            reader = new StringReader(sb.ToString());
            readToken = (QueueContinuationToken)serializer.Deserialize(reader);
            Assert.AreEqual(writeToken.NextMarker, readToken.NextMarker);

            // Read with token.ReadXml()
            using (XmlReader xmlReader = XmlReader.Create(new StringReader(sb.ToString())))
            {
                readToken = new QueueContinuationToken();
                readToken.ReadXml(xmlReader);
            }
            Assert.AreEqual(writeToken.NextMarker, readToken.NextMarker);
        }

        public void QueueContinuationTokenVerifyXmlWithinXml()
        {
            CloudQueueClient client = GenerateCloudQueueClient();
            string prefix = "dotnetqueuetest" + Guid.NewGuid().ToString("N");
            List<string> queueNames = new List<string>();
            int count = 30;
            for (int i = 0; i < count; i++)
            {
                queueNames.Add(prefix + i);
                client.GetQueueReference(prefix + i).Create();
            }

            QueueContinuationToken token = null;
            List<CloudQueue> results = new List<CloudQueue>();

            do
            {
                QueueResultSegment segment = client.ListQueuesSegmented(prefix, QueueListingDetails.None, 5, token, null, null);
                token = segment.ContinuationToken;
                results.AddRange(segment.Results);
                if (token != null)
                {
                    Assert.AreEqual(null, token.GetSchema());

                    XmlWriterSettings settings = new XmlWriterSettings();
                    settings.Indent = true;
                    StringBuilder sb = new StringBuilder();
                    using (XmlWriter writer = XmlWriter.Create(sb, settings))
                    {
                        writer.WriteStartElement("test1");
                        writer.WriteStartElement("test2");
                        token.WriteXml(writer);
                        writer.WriteEndElement();
                        writer.WriteEndElement();
                    }

                    using (XmlReader reader = XmlReader.Create(new StringReader(sb.ToString())))
                    {
                        token = new QueueContinuationToken();
                        reader.ReadStartElement();
                        reader.ReadStartElement();
                        token.ReadXml(reader);
                        reader.ReadEndElement();
                        reader.ReadEndElement();
                    }
                }
            }
            while (token != null);

            foreach (CloudQueue queue in results)
            {
                if (queueNames.Remove(queue.Name))
                {
                    queue.Delete();
                }
                else
                {
                    Assert.Fail();
                }
            }

            Assert.AreEqual<int>(0, queueNames.Count);
        }

 public virtual Task<QueueResultSegment> ListQueuesSegmentedAsync(string prefix, QueueContinuationToken currentToken)
 {
     return this.ListQueuesSegmentedAsync(prefix, QueueListingDetails.None, null, currentToken, null, null);
 }

        /// <summary>
        /// Core implementation for the ListQueues method.
        /// </summary>
        /// <param name="prefix">The queue prefix.</param>
        /// <param name="detailsIncluded">The details included.</param>
        /// <param name="currentToken">The continuation token.</param>
        /// <param name="maxResults">A non-negative integer value that indicates the maximum number of results to be returned at a time, up to the 
        /// per-operation limit of 5000. If this value is <c>null</c>, the maximum possible number of results will be returned, up to 5000.</param>
        /// <returns>A <see cref="TaskSequence"/> that lists the queues.</returns>
        private RESTCommand<ResultSegment<CloudQueue>> ListQueuesImpl(string prefix, int? maxResults, QueueListingDetails detailsIncluded, QueueRequestOptions options, QueueContinuationToken currentToken)
        {
            ListingContext listingContext = new ListingContext(prefix, maxResults)
            {
                Marker = currentToken != null ? currentToken.NextMarker : null
            };

            RESTCommand<ResultSegment<CloudQueue>> getCmd = new RESTCommand<ResultSegment<CloudQueue>>(this.Credentials, this.StorageUri);

            options.ApplyToStorageCommand(getCmd);
            getCmd.CommandLocationMode = CommonUtility.GetListingLocationMode(currentToken);
            getCmd.RetrieveResponseStream = true;
            getCmd.BuildRequest = (cmd, uri, builder, cnt, serverTimeout, ctx) => QueueHttpRequestMessageFactory.List(uri, serverTimeout, listingContext, detailsIncluded, cnt, ctx, this.GetCanonicalizer(), this.Credentials);
            getCmd.PreProcessResponse = (cmd, resp, ex, ctx) => HttpResponseParsers.ProcessExpectedStatusCodeNoException(HttpStatusCode.OK, resp, null /* retVal */, cmd, ex);
            getCmd.PostProcessResponse = (cmd, resp, ctx) =>
            {
                return Task.Factory.StartNew(() =>
                {
                    ListQueuesResponse listQueuesResponse = new ListQueuesResponse(cmd.ResponseStream);

                    List<CloudQueue> queuesList = listQueuesResponse.Queues.Select(item => new CloudQueue(item.Metadata, item.Name, this)).ToList();

                    QueueContinuationToken continuationToken = null;
                    if (listQueuesResponse.NextMarker != null)
                    {
                        continuationToken = new QueueContinuationToken()
                        {
                            NextMarker = listQueuesResponse.NextMarker,
                            TargetLocation = cmd.CurrentResult.TargetLocation,
                        };
                    }

                    return new ResultSegment<CloudQueue>(queuesList)
                    {
                        ContinuationToken = continuationToken,
                    };
                });
            };

            return getCmd;
        }

        public void QueueContinuationTokenVerifyEmptyTargetDeserializer()
        {
            QueueContinuationToken queueContinuationToken = new QueueContinuationToken { TargetLocation = null };
            StringBuilder stringBuilder = new StringBuilder();
            using (XmlWriter writer = XmlWriter.Create(stringBuilder))
            {
                queueContinuationToken.WriteXml(writer);
            }

            string stringToken = stringBuilder.ToString();
            QueueContinuationToken parsedToken = new QueueContinuationToken();
            parsedToken.ReadXml(XmlReader.Create(new System.IO.StringReader(stringToken)));
            Assert.AreEqual(parsedToken.TargetLocation, null);
        }

        /// <summary>
        /// Returns a result segment containing a collection of queues
        /// whose names begin with the specified prefix.
        /// </summary>
        /// <param name="prefix">The queue name prefix.</param>
        /// <param name="detailsIncluded">A value that indicates whether to return queue metadata with the listing.</param>
        /// <param name="maxResults">A non-negative integer value that indicates the maximum number of results to be returned 
        /// in the result segment, up to the per-operation limit of 5000. If this value is <c>null</c>, the maximum possible number of results will be returned, up to 5000.</param>         
        /// <param name="currentToken">A <see cref="QueueContinuationToken"/> token returned by a previous listing operation.</param>
        /// <param name="options">An object that specifies additional options for the request.</param>
        /// <param name="operationContext">An <see cref="OperationContext"/> object that represents the context for the current operation.</param>
        /// <returns>A result segment of queues.</returns>
        public IAsyncOperation<QueueResultSegment> ListQueuesSegmentedAsync(string prefix, QueueListingDetails detailsIncluded, int? maxResults, QueueContinuationToken currentToken, QueueRequestOptions options, OperationContext operationContext)
        {
            QueueRequestOptions modifiedOptions = QueueRequestOptions.ApplyDefaults(options, this);
            operationContext = operationContext ?? new OperationContext();

            return AsyncInfo.Run(async (token) =>
            {
                ResultSegment<CloudQueue> resultSegment = await Executor.ExecuteAsync(
                    this.ListQueuesImpl(prefix, maxResults, detailsIncluded, modifiedOptions, currentToken),
                    this.RetryPolicy,
                    operationContext,
                    token);

                return new QueueResultSegment(resultSegment.Results, (QueueContinuationToken)resultSegment.ContinuationToken);
            });
        }

 /// <summary>
 /// Returns a result segment containing a collection of queues in the storage account.
 /// </summary>
 /// <param name="prefix">The queue name prefix.</param>
 /// <param name="currentToken">A <see cref="QueueContinuationToken"/> continuation token returned by a previous listing operation.</param>
 /// <returns>A result segment containing objects that implement <see cref="CloudQueue"/>.</returns>
 public QueueResultSegment ListQueuesSegmented(string prefix, QueueContinuationToken currentToken)
 {
     return this.ListQueuesSegmented(prefix, QueueListingDetails.None, null, currentToken, null, null);
 }

        /// <summary>
        /// Core implementation of the ListQueues method.
        /// </summary>
        /// <param name="prefix">The queue name prefix.</param>
        /// <param name="maxResults">A non-negative integer value that indicates the maximum number of results to be returned at a time, up to the 
        /// per-operation limit of 5000. If this value is <c>null</c>, the maximum possible number of results will be returned, up to 5000.</param>
        /// <param name="queueListingDetails">A <see cref="QueueListingDetails"/> enumeration describing which items to include in the listing.</param>
        /// <param name="options">An object that specifies additional options for the request.</param>
        /// <param name="currentToken">The continuation token.</param>
        /// <returns>A <see cref="RESTCommand{T}"/> that lists the queues.</returns>
        private RESTCommand<ResultSegment<CloudQueue>> ListQueuesImpl(string prefix, int? maxResults, QueueListingDetails queueListingDetails, QueueRequestOptions options, QueueContinuationToken currentToken)
        {
            QueueListingContext listingContext = new QueueListingContext(prefix, maxResults, queueListingDetails)
            {
                Marker = currentToken != null ? currentToken.NextMarker : null
            };

            RESTCommand<ResultSegment<CloudQueue>> getCmd = new RESTCommand<ResultSegment<CloudQueue>>(this.Credentials, this.BaseUri);

            getCmd.ApplyRequestOptions(options);
            getCmd.RetrieveResponseStream = true;
            getCmd.BuildRequestDelegate = (uri, builder, serverTimeout, ctx) => QueueHttpWebRequestFactory.List(uri, serverTimeout, listingContext, queueListingDetails, ctx);
            getCmd.SignRequest = this.AuthenticationHandler.SignRequest;
            getCmd.PreProcessResponse = (cmd, resp, ex, ctx) => HttpResponseParsers.ProcessExpectedStatusCodeNoException(HttpStatusCode.OK, resp, null /* retVal */, cmd, ex);
            getCmd.PostProcessResponse = (cmd, resp, ctx) =>
            {
                ListQueuesResponse listQueuesResponse = new ListQueuesResponse(cmd.ResponseStream);

                List<CloudQueue> queuesList = new List<CloudQueue>(
                    listQueuesResponse.Queues.Select(item => new CloudQueue(item.Name, this)));

                QueueContinuationToken continuationToken = null;
                if (listQueuesResponse.NextMarker != null)
                {
                    continuationToken = new QueueContinuationToken()
                    {
                        NextMarker = listQueuesResponse.NextMarker,
                    };
                }

                return new ResultSegment<CloudQueue>(queuesList)
                {
                    ContinuationToken = continuationToken,
                };
            };

            return getCmd;
        }