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// Licensed under the MIT License.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Threading;

using System.Threading.Tasks;

using Microsoft.Azure.Documents;

using Microsoft.Azure.Documents.Client;

using Microsoft.Azure.Documents.Linq;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Serialization;

namespace Microsoft.Bot.Builder.Azure

{

/// <summary>

/// Implements an CosmosDB based storage provider for a bot.

/// </summary>

public class CosmosDbStorage : IStorage

{

// When setting up the database, calls are made to CosmosDB. If multiple calls are made, we'll end up setting the

// collectionLink member variable more than once. The semaphore is for making sure the initialization of the

// database is done only once.

private static SemaphoreSlim _semaphore = new SemaphoreSlim(1);

private readonly JsonSerializer _jsonSerializer = JsonSerializer.Create(new JsonSerializerSettings { TypeNameHandling = TypeNameHandling.All });

private readonly string _databaseId;

private readonly string _partitionKey;

private readonly string _collectionId;

private readonly RequestOptions _documentCollectionCreationRequestOptions = null;

private readonly RequestOptions _databaseCreationRequestOptions = null;

private readonly IDocumentClient _client;

private string _collectionLink = null;

/// <summary>

/// Initializes a new instance of the <see cref="CosmosDbStorage"/> class.

/// using the provided CosmosDB credentials, database ID, and collection ID.

/// </summary>

/// <param name="cosmosDbStorageOptions">Cosmos DB storage configuration options.</param>

public CosmosDbStorage(CosmosDbStorageOptions cosmosDbStorageOptions)

{

if (cosmosDbStorageOptions == null)

{

throw new ArgumentNullException(nameof(cosmosDbStorageOptions));

}

if (cosmosDbStorageOptions.CosmosDBEndpoint == null)

{

throw new ArgumentNullException(nameof(cosmosDbStorageOptions.CosmosDBEndpoint), "Service EndPoint for CosmosDB is required.");

}

if (string.IsNullOrEmpty(cosmosDbStorageOptions.AuthKey))

{

throw new ArgumentException("AuthKey for CosmosDB is required.", nameof(cosmosDbStorageOptions.AuthKey));

}

if (string.IsNullOrEmpty(cosmosDbStorageOptions.DatabaseId))

{

throw new ArgumentException("DatabaseId is required.", nameof(cosmosDbStorageOptions.DatabaseId));

}

if (string.IsNullOrEmpty(cosmosDbStorageOptions.CollectionId))

{

throw new ArgumentException("CollectionId is required.", nameof(cosmosDbStorageOptions.CollectionId));

}

_databaseId = cosmosDbStorageOptions.DatabaseId;

_collectionId = cosmosDbStorageOptions.CollectionId;

_partitionKey = cosmosDbStorageOptions.PartitionKey;

_documentCollectionCreationRequestOptions = cosmosDbStorageOptions.DocumentCollectionRequestOptions;

_databaseCreationRequestOptions = cosmosDbStorageOptions.DatabaseCreationRequestOptions;

// Inject BotBuilder version to CosmosDB Requests

var version = GetType().Assembly.GetName().Version;

var connectionPolicy = new ConnectionPolicy { UserAgentSuffix = $"Microsoft-BotFramework {version}" };

// Invoke CollectionPolicy delegate to further customize settings

cosmosDbStorageOptions.ConnectionPolicyConfigurator?.Invoke(connectionPolicy);

_client = new DocumentClient(cosmosDbStorageOptions.CosmosDBEndpoint, cosmosDbStorageOptions.AuthKey, connectionPolicy);

}

/// <summary>

/// Initializes a new instance of the <see cref="CosmosDbStorage"/> class.

/// using the provided CosmosDB credentials, database ID, and collection ID.

/// </summary>

/// <param name="cosmosDbStorageOptions">Cosmos DB storage configuration options.</param>

/// <param name="jsonSerializer">If passing in a custom JsonSerializer, we recommend the following settings:

/// <para>jsonSerializer.TypeNameHandling = TypeNameHandling.All.</para>

/// <para>jsonSerializer.NullValueHandling = NullValueHandling.Include.</para>

/// <para>jsonSerializer.ContractResolver = new DefaultContractResolver().</para>

/// </param>

public CosmosDbStorage(CosmosDbStorageOptions cosmosDbStorageOptions, JsonSerializer jsonSerializer)

: this(cosmosDbStorageOptions)

{

if (jsonSerializer == null)

{

throw new ArgumentNullException(nameof(jsonSerializer));

已保存差异

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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Azure.Documents;
using Microsoft.Azure.Documents.Client;
using Microsoft.Azure.Documents.Linq;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json.Serialization;

namespace Microsoft.Bot.Builder.Azure
{
    /// <summary>
    /// Implements an CosmosDB based storage provider for a bot.
    /// </summary>
    public class CosmosDbStorage : IStorage
    {
        // When setting up the database, calls are made to CosmosDB. If multiple calls are made, we'll end up setting the
        // collectionLink member variable more than once. The semaphore is for making sure the initialization of the
        // database is done only once.
        private static SemaphoreSlim _semaphore = new SemaphoreSlim(1);

private readonly JsonSerializer _jsonSerializer = JsonSerializer.Create(new JsonSerializerSettings { TypeNameHandling = TypeNameHandling.All });

private readonly string _databaseId;
        private readonly string _partitionKey;
        private readonly string _collectionId;
        private readonly RequestOptions _documentCollectionCreationRequestOptions = null;
        private readonly RequestOptions _databaseCreationRequestOptions = null;
        private readonly IDocumentClient _client;
        private string _collectionLink = null;

if (cosmosDbStorageOptions.CosmosDBEndpoint == null)
            {
                throw new ArgumentNullException(nameof(cosmosDbStorageOptions.CosmosDBEndpoint), "Service EndPoint for CosmosDB is required.");
            }

if (string.IsNullOrEmpty(cosmosDbStorageOptions.AuthKey))
            {
                throw new ArgumentException("AuthKey for CosmosDB is required.", nameof(cosmosDbStorageOptions.AuthKey));
            }

if (string.IsNullOrEmpty(cosmosDbStorageOptions.DatabaseId))
            {
                throw new ArgumentException("DatabaseId is required.", nameof(cosmosDbStorageOptions.DatabaseId));
            }

if (string.IsNullOrEmpty(cosmosDbStorageOptions.CollectionId))
            {
                throw new ArgumentException("CollectionId is required.", nameof(cosmosDbStorageOptions.CollectionId));
            }

_databaseId = cosmosDbStorageOptions.DatabaseId;
            _collectionId = cosmosDbStorageOptions.CollectionId;
            _partitionKey = cosmosDbStorageOptions.PartitionKey;
            _documentCollectionCreationRequestOptions = cosmosDbStorageOptions.DocumentCollectionRequestOptions;
            _databaseCreationRequestOptions = cosmosDbStorageOptions.DatabaseCreationRequestOptions;

// Inject BotBuilder version to CosmosDB Requests
            var version = GetType().Assembly.GetName().Version;
            var connectionPolicy = new ConnectionPolicy { UserAgentSuffix = $"Microsoft-BotFramework {version}" };

// Invoke CollectionPolicy delegate to further customize settings
            cosmosDbStorageOptions.ConnectionPolicyConfigurator?.Invoke(connectionPolicy);
            _client = new DocumentClient(cosmosDbStorageOptions.CosmosDBEndpoint, cosmosDbStorageOptions.AuthKey, connectionPolicy);
        }

/// <summary>
        /// Initializes a new instance of the <see cref="CosmosDbStorage"/> class.
        /// using the provided CosmosDB credentials, database ID, and collection ID.
        /// </summary>
        /// <param name="cosmosDbStorageOptions">Cosmos DB storage configuration options.</param>
        /// <param name="jsonSerializer">If passing in a custom JsonSerializer, we recommend the following settings:
        /// <para>jsonSerializer.TypeNameHandling = TypeNameHandling.All.</para>
        /// <para>jsonSerializer.NullValueHandling = NullValueHandling.Include.</para>
        /// <para>jsonSerializer.ContractResolver = new DefaultContractResolver().</para>
        /// </param>
        public CosmosDbStorage(CosmosDbStorageOptions cosmosDbStorageOptions, JsonSerializer jsonSerializer)
            : this(cosmosDbStorageOptions)
        {
            if (jsonSerializer == null)
            {
                throw new ArgumentNullException(nameof(jsonSerializer));
            }

_jsonSerializer = jsonSerializer;
        }

/// <summary>
        /// Initializes a new instance of the <see cref="CosmosDbStorage"/> class.
        /// This constructor should only be used if the default behavior of the DocumentClient needs to be changed.
        /// The <see cref="CosmosDbStorage(CosmosDbStorageOptions)"/> constructor is preferer for most cases.
        /// </summary>
        /// <param name="documentClient">The custom implementation of IDocumentClient.</param>
        /// <param name="cosmosDbCustomClientOptions">Custom client configuration options.</param>
        public CosmosDbStorage(IDocumentClient documentClient, CosmosDbCustomClientOptions cosmosDbCustomClientOptions)
        {
            if (cosmosDbCustomClientOptions == null)
            {
                throw new ArgumentNullException(nameof(cosmosDbCustomClientOptions));
            }

if (string.IsNullOrEmpty(cosmosDbCustomClientOptions.DatabaseId))
            {
                throw new ArgumentException("DatabaseId is required.", nameof(cosmosDbCustomClientOptions.DatabaseId));
            }

if (string.IsNullOrEmpty(cosmosDbCustomClientOptions.CollectionId))
            {
                throw new ArgumentException("CollectionId is required.", nameof(cosmosDbCustomClientOptions.CollectionId));
            }

_client = documentClient ?? throw new ArgumentNullException(nameof(documentClient), "An implementation of IDocumentClient for CosmosDB is required.");
            _databaseId = cosmosDbCustomClientOptions.DatabaseId;
            _collectionId = cosmosDbCustomClientOptions.CollectionId;
            _documentCollectionCreationRequestOptions = cosmosDbCustomClientOptions.DocumentCollectionRequestOptions;
            _databaseCreationRequestOptions = cosmosDbCustomClientOptions.DatabaseCreationRequestOptions;

// Inject BotBuilder version to CosmosDB Requests
            var version = GetType().Assembly.GetName().Version;
            _client.ConnectionPolicy.UserAgentSuffix = $"Microsoft-BotFramework {version}";
        }

[Obsolete("Replaced by CosmosDBKeyEscape.EscapeKey.")]
        public static string SanitizeKey(string key) => CosmosDbKeyEscape.EscapeKey(key);

/// <summary>
        /// Deletes storage items from storage.
        /// </summary>
        /// <param name="keys">keys of the <see cref="IStoreItem"/> objects to remove from the store.</param>
        /// <param name="cancellationToken">A cancellation token that can be used by other objects
        /// or threads to receive notice of cancellation.</param>
        /// <returns>A task that represents the work queued to execute.</returns>
        /// <seealso cref="ReadAsync(string[], CancellationToken)"/>
        /// <seealso cref="WriteAsync(IDictionary{string, object}, CancellationToken)"/>
        public async Task DeleteAsync(string[] keys, CancellationToken cancellationToken)
        {
            RequestOptions options = null;

if (keys == null)
            {
                throw new ArgumentNullException(nameof(keys));
            }

if (keys.Length == 0)
            {
                return;
            }

// Ensure Initialization has been run
            await InitializeAsync().ConfigureAwait(false);

if (!string.IsNullOrEmpty(this._partitionKey))
            {
                options = new RequestOptions() { PartitionKey = new PartitionKey(this._partitionKey) };
            }

// Parallelize deletion
            var tasks = keys.Select(key =>
                _client.DeleteDocumentAsync(
                    UriFactory.CreateDocumentUri(
                        _databaseId,
                        _collectionId,
                        CosmosDbKeyEscape.EscapeKey(key)),
                    options,
                    cancellationToken: cancellationToken));

// await to deletion tasks to complete
            await Task.WhenAll(tasks).ConfigureAwait(false);
        }

/// <summary>
        /// Reads storage items from storage.
        /// </summary>
        /// <param name="keys">keys of the <see cref="IStoreItem"/> objects to read from the store.</param>
        /// <param name="cancellationToken">A cancellation token that can be used by other objects
        /// or threads to receive notice of cancellation.</param>
        /// <returns>A task that represents the work queued to execute.</returns>
        /// <remarks>If the activities are successfully sent, the task result contains
        /// the items read, indexed by key.</remarks>
        /// <seealso cref="DeleteAsync(string[], CancellationToken)"/>
        /// <seealso cref="WriteAsync(IDictionary{string, object}, CancellationToken)"/>
        public async Task<IDictionary<string, object>> ReadAsync(string[] keys, CancellationToken cancellationToken)
        {
            FeedOptions options = null;

if (keys == null)
            {
                throw new ArgumentNullException(nameof(keys));
            }

if (keys.Length == 0)
            {
                // No keys passed in, no result to return.
                return new Dictionary<string, object>();
            }

// Ensure Initialization has been run
            await InitializeAsync().ConfigureAwait(false);

if (!string.IsNullOrEmpty(this._partitionKey))
            {
                options = new FeedOptions() { PartitionKey = new PartitionKey(this._partitionKey) };
            }

var storeItems = new Dictionary<string, object>(keys.Length);

var query = _client.CreateDocumentQuery<DocumentStoreItem>(_collectionLink, querySpec, options).AsDocumentQuery();
            while (query.HasMoreResults)
            {
                foreach (var doc in await query.ExecuteNextAsync<DocumentStoreItem>(cancellationToken).ConfigureAwait(false))
                {
                    var item = doc.Document.ToObject(typeof(object), _jsonSerializer);
                    if (item is IStoreItem storeItem)
                    {
                        storeItem.ETag = doc.ETag;
                    }

// doc.Id cannot be used since it is escaped, read it from RealId property instead
                    storeItems.Add(doc.ReadlId, item);
                }
            }

return storeItems;
        }

/// <summary>
        /// Writes storage items to storage.
        /// </summary>
        /// <param name="changes">The items to write to storage, indexed by key.</param>
        /// <param name="cancellationToken">A cancellation token that can be used by other objects
        /// or threads to receive notice of cancellation.</param>
        /// <returns>A task that represents the work queued to execute.</returns>
        /// <seealso cref="DeleteAsync(string[], CancellationToken)"/>
        /// <seealso cref="ReadAsync(string[], CancellationToken)"/>
        public async Task WriteAsync(IDictionary<string, object> changes, CancellationToken cancellationToken)
        {
            if (changes == null)
            {
                throw new ArgumentNullException(nameof(changes));
            }

if (changes.Count == 0)
            {
                return;
            }

// Ensure Initialization has been run
            await InitializeAsync().ConfigureAwait(false);

foreach (var change in changes)
            {
                var json = JObject.FromObject(change.Value, _jsonSerializer);

// Remove etag from JSON object that was copied from IStoreItem.
                // The ETag information is updated as an _etag attribute in the document metadata.
                json.Remove("eTag");

var documentChange = new DocumentStoreItem
                {
                    Id = CosmosDbKeyEscape.EscapeKey(change.Key),
                    ReadlId = change.Key,
                    Document = json,
                };

/// <summary>
        /// Creates the CosmosDB Database and populates the _collectionLink member variable.
        /// </summary>
        /// <remarks>
        /// This method is idempotent, and thread safe.
        /// </remarks>
        private async Task InitializeAsync()
        {
            // In the steady-state case, we'll already have a connection string to the
            // database setup. If so, no need to enter locks or call CosmosDB to get one.
            if (_collectionLink == null)
            {
                // We don't (probably) have a database link yet. Enter the lock,
                // then check again (aka: Double-Check Lock pattern).
                await _semaphore.WaitAsync().ConfigureAwait(false);
                try
                {
                    if (_collectionLink == null)
                    {
                        // We don't have a database link. Create one. Note that we're inside a semaphore at this point
                        // so other threads may be blocked on us.
                        await _client.CreateDatabaseIfNotExistsAsync(
                            new Database { Id = _databaseId },
                            _databaseCreationRequestOptions) // pass in any user set database creation flags
                            .ConfigureAwait(false);

var documentCollection = new DocumentCollection
                        {
                            Id = _collectionId,
                        };

var response = await _client.CreateDocumentCollectionIfNotExistsAsync(
                            UriFactory.CreateDatabaseUri(_databaseId),
                            documentCollection,
                            _documentCollectionCreationRequestOptions) // pass in any user set collection creation flags
                            .ConfigureAwait(false);

_collectionLink = response.Resource.SelfLink;
                    }
                }
                finally
                {
                    _semaphore.Release();
                }
            }
        }

/// <summary>
        /// Internal data structure for storing items in a CosmosDB Collection.
        /// </summary>
        private class DocumentStoreItem
        {
            /// <summary>
            /// Gets or sets the sanitized Id/Key used as PrimaryKey.
            /// </summary>
            [JsonProperty("id")]
            public string Id { get; set; }

/// <summary>
            /// Gets or sets the un-sanitized Id/Key.
            /// </summary>
            /// <remarks>
            /// Note: There is a Typo in the property name ("ReadlId"), that can't be changed due to compatability concerns. The
            /// Json is correct due to the JsonProperty field, but the Typo needs to stay.
            /// </remarks>
            [JsonProperty("realId")]
            public string ReadlId { get; internal set; }

// DO NOT FIX THE TYPO BELOW (See Remarks above).

/// <summary>
            /// Gets or sets the persisted object.
            /// </summary>
            [JsonProperty("document")]
            public JObject Document { get; set; }

/// <summary>
            /// Gets or sets the ETag information for handling optimistic concurrency updates.
            /// </summary>
            [JsonProperty("_etag")]
            public string ETag { get; set; }
        }
    }
}

更改后文本

打开文件

private readonly JsonSerializer _jsonSerializer = JsonSerializer.Create(new JsonSerializerSettings { TypeNameHandling = TypeNameHandling.All });

_jsonSerializer = jsonSerializer;
        }

[Obsolete("Replaced by CosmosDBKeyEscape.EscapeKey.")]
        public static string SanitizeKey(string key) => CosmosDbKeyEscape.EscapeKey(key);

if (keys == null)
            {
                throw new ArgumentNullException(nameof(keys));
            }

if (keys.Length == 0)
            {
                return;
            }

// Ensure Initialization has been run
            await InitializeAsync().ConfigureAwait(false);

// Parallelize deletion
            var tasks = keys.Select(key =>
                _client.DeleteDocumentAsync(
                    UriFactory.CreateDocumentUri(
                        _databaseId,
                        _collectionId,
                        CosmosDbKeyEscape.EscapeKey(key)),
                    new RequestOptions() { PartitionKey = new PartitionKey(key) },
                    cancellationToken: cancellationToken));

// await to deletion tasks to complete
            await Task.WhenAll(tasks).ConfigureAwait(false);
        }

if (keys == null)
            {
                throw new ArgumentNullException(nameof(keys));
            }

if (keys.Length == 0)
            {
                // No keys passed in, no result to return.
                return new Dictionary<string, object>();
            }

// Ensure Initialization has been run
            await InitializeAsync().ConfigureAwait(false);

var storeItems = new Dictionary<string, object>(keys.Length);

var query = _client.CreateDocumentQuery<DocumentStoreItem>(_collectionLink, querySpec, new FeedOptions() { PartitionKey = new PartitionKey(keys[0]) }).AsDocumentQuery();
            while (query.HasMoreResults)
            {
                foreach (var doc in await query.ExecuteNextAsync<DocumentStoreItem>(cancellationToken).ConfigureAwait(false))
                {
                    var item = doc.Document.ToObject(typeof(object), _jsonSerializer);
                    if (item is IStoreItem storeItem)
                    {
                        storeItem.ETag = doc.ETag;
                    }

// doc.Id cannot be used since it is escaped, read it from RealId property instead
                    storeItems.Add(doc.ReadlId, item);
                }
            }

return storeItems;
        }

if (changes.Count == 0)
            {
                return;
            }

// Ensure Initialization has been run
            await InitializeAsync().ConfigureAwait(false);

foreach (var change in changes)
            {
                var json = JObject.FromObject(change.Value, _jsonSerializer);

var documentCollection = new DocumentCollection
                        {
                            Id = _collectionId,
                        };

// DO NOT FIX THE TYPO BELOW (See Remarks above).

/// <summary>
            /// Gets or sets the persisted object.
            /// </summary>
            [JsonProperty("document")]
            public JObject Document { get; set; }