/
MongoClient.cs
603 lines (531 loc) · 25.1 KB
/
MongoClient.cs
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/* Copyright 2010-present MongoDB Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MongoDB.Bson;
using MongoDB.Bson.IO;
using MongoDB.Bson.Serialization;
using MongoDB.Bson.Serialization.Serializers;
using MongoDB.Driver.Core.Bindings;
using MongoDB.Driver.Core.Clusters;
using MongoDB.Driver.Core.Misc;
using MongoDB.Driver.Core.Operations;
using MongoDB.Driver.Core.WireProtocol.Messages.Encoders;
using MongoDB.Driver.Encryption;
using MongoDB.Driver.Linq;
namespace MongoDB.Driver
{
/// <inheritdoc/>
public class MongoClient : MongoClientBase
{
// private fields
private readonly ICluster _cluster;
private readonly AutoEncryptionLibMongoCryptController _libMongoCryptController;
private readonly LinqProvider _linqProvider;
private readonly IOperationExecutor _operationExecutor;
private readonly MongoClientSettings _settings;
// constructors
/// <summary>
/// Initializes a new instance of the MongoClient class.
/// </summary>
public MongoClient()
: this(new MongoClientSettings())
{
}
/// <summary>
/// Initializes a new instance of the MongoClient class.
/// </summary>
/// <param name="settings">The settings.</param>
public MongoClient(MongoClientSettings settings)
{
_settings = Ensure.IsNotNull(settings, nameof(settings)).FrozenCopy();
_linqProvider = _settings.LinqProvider;
_cluster = ClusterRegistry.Instance.GetOrCreateCluster(_settings.ToClusterKey());
_operationExecutor = new OperationExecutor(this);
if (settings.AutoEncryptionOptions != null)
{
_libMongoCryptController = AutoEncryptionLibMongoCryptController.Create(
this,
_cluster.CryptClient,
settings.AutoEncryptionOptions);
}
}
/// <summary>
/// Initializes a new instance of the MongoClient class.
/// </summary>
/// <param name="url">The URL.</param>
public MongoClient(MongoUrl url)
: this(MongoClientSettings.FromUrl(url))
{
}
/// <summary>
/// Initializes a new instance of the MongoClient class.
/// </summary>
/// <param name="connectionString">The connection string.</param>
public MongoClient(string connectionString)
: this(MongoClientSettings.FromConnectionString(connectionString))
{
}
internal MongoClient(IOperationExecutor operationExecutor, MongoClientSettings settings)
: this(settings)
{
_operationExecutor = operationExecutor;
}
// public properties
/// <summary>
/// Gets the cluster.
/// </summary>
public override ICluster Cluster
{
get { return _cluster; }
}
/// <inheritdoc/>
public sealed override MongoClientSettings Settings
{
get { return _settings; }
}
// internal properties
internal AutoEncryptionLibMongoCryptController LibMongoCryptController => _libMongoCryptController;
internal IOperationExecutor OperationExecutor => _operationExecutor;
// internal methods
internal void ConfigureAutoEncryptionMessageEncoderSettings(MessageEncoderSettings messageEncoderSettings)
{
var autoEncryptionOptions = _settings.AutoEncryptionOptions;
if (autoEncryptionOptions != null)
{
if (!autoEncryptionOptions.BypassAutoEncryption)
{
messageEncoderSettings.Add(MessageEncoderSettingsName.BinaryDocumentFieldEncryptor, _libMongoCryptController);
}
messageEncoderSettings.Add(MessageEncoderSettingsName.BinaryDocumentFieldDecryptor, _libMongoCryptController);
}
}
// public methods
/// <inheritdoc/>
public sealed override void DropDatabase(string name, CancellationToken cancellationToken = default(CancellationToken))
{
UsingImplicitSession(session => DropDatabase(session, name, cancellationToken), cancellationToken);
}
/// <inheritdoc/>
public sealed override void DropDatabase(IClientSessionHandle session, string name, CancellationToken cancellationToken = default(CancellationToken))
{
Ensure.IsNotNull(session, nameof(session));
var messageEncoderSettings = GetMessageEncoderSettings();
var operation = new DropDatabaseOperation(new DatabaseNamespace(name), messageEncoderSettings)
{
WriteConcern = _settings.WriteConcern
};
ExecuteWriteOperation(session, operation, cancellationToken);
}
/// <inheritdoc/>
public sealed override Task DropDatabaseAsync(string name, CancellationToken cancellationToken = default(CancellationToken))
{
return UsingImplicitSessionAsync(session => DropDatabaseAsync(session, name, cancellationToken), cancellationToken);
}
/// <inheritdoc/>
public sealed override Task DropDatabaseAsync(IClientSessionHandle session, string name, CancellationToken cancellationToken = default(CancellationToken))
{
Ensure.IsNotNull(session, nameof(session));
var messageEncoderSettings = GetMessageEncoderSettings();
var operation = new DropDatabaseOperation(new DatabaseNamespace(name), messageEncoderSettings)
{
WriteConcern = _settings.WriteConcern
};
return ExecuteWriteOperationAsync(session, operation, cancellationToken);
}
/// <inheritdoc/>
public sealed override IMongoDatabase GetDatabase(string name, MongoDatabaseSettings settings = null)
{
settings = settings == null ?
new MongoDatabaseSettings() :
settings.Clone();
settings.ApplyDefaultValues(_settings);
return new MongoDatabaseImpl(this, new DatabaseNamespace(name), settings, _cluster, _operationExecutor);
}
/// <inheritdoc />
public sealed override IAsyncCursor<string> ListDatabaseNames(
CancellationToken cancellationToken = default(CancellationToken))
{
return ListDatabaseNames(options: null, cancellationToken);
}
/// <inheritdoc />
public sealed override IAsyncCursor<string> ListDatabaseNames(
ListDatabaseNamesOptions options,
CancellationToken cancellationToken = default(CancellationToken))
{
return UsingImplicitSession(session => ListDatabaseNames(session, options, cancellationToken), cancellationToken);
}
/// <inheritdoc />
public sealed override IAsyncCursor<string> ListDatabaseNames(
IClientSessionHandle session,
CancellationToken cancellationToken = default(CancellationToken))
{
return ListDatabaseNames(session, options: null, cancellationToken);
}
/// <inheritdoc />
public sealed override IAsyncCursor<string> ListDatabaseNames(
IClientSessionHandle session,
ListDatabaseNamesOptions options,
CancellationToken cancellationToken = default(CancellationToken))
{
var listDatabasesOptions = CreateListDatabasesOptionsFromListDatabaseNamesOptions(options);
var databases = ListDatabases(session, listDatabasesOptions, cancellationToken);
return CreateDatabaseNamesCursor(databases);
}
/// <inheritdoc />
public sealed override Task<IAsyncCursor<string>> ListDatabaseNamesAsync(
CancellationToken cancellationToken = default(CancellationToken))
{
return ListDatabaseNamesAsync(options: null, cancellationToken);
}
/// <inheritdoc />
public sealed override Task<IAsyncCursor<string>> ListDatabaseNamesAsync(
ListDatabaseNamesOptions options,
CancellationToken cancellationToken = default(CancellationToken))
{
return UsingImplicitSessionAsync(session => ListDatabaseNamesAsync(session, options, cancellationToken), cancellationToken);
}
/// <inheritdoc />
public sealed override Task<IAsyncCursor<string>> ListDatabaseNamesAsync(
IClientSessionHandle session,
CancellationToken cancellationToken = default(CancellationToken))
{
return ListDatabaseNamesAsync(session, options: null, cancellationToken);
}
/// <inheritdoc />
public sealed override async Task<IAsyncCursor<string>> ListDatabaseNamesAsync(
IClientSessionHandle session,
ListDatabaseNamesOptions options,
CancellationToken cancellationToken = default(CancellationToken))
{
var listDatabasesOptions = CreateListDatabasesOptionsFromListDatabaseNamesOptions(options);
var databases = await ListDatabasesAsync(session, listDatabasesOptions, cancellationToken).ConfigureAwait(false);
return CreateDatabaseNamesCursor(databases);
}
/// <inheritdoc/>
public sealed override IAsyncCursor<BsonDocument> ListDatabases(
CancellationToken cancellationToken = default(CancellationToken))
{
return UsingImplicitSession(session => ListDatabases(session, cancellationToken), cancellationToken);
}
/// <inheritdoc/>
public sealed override IAsyncCursor<BsonDocument> ListDatabases(
ListDatabasesOptions options,
CancellationToken cancellationToken = default(CancellationToken))
{
return UsingImplicitSession(session => ListDatabases(session, options, cancellationToken), cancellationToken);
}
/// <inheritdoc/>
public sealed override IAsyncCursor<BsonDocument> ListDatabases(
IClientSessionHandle session,
CancellationToken cancellationToken = default(CancellationToken))
{
return ListDatabases(session, null, cancellationToken);
}
/// <inheritdoc/>
public sealed override IAsyncCursor<BsonDocument> ListDatabases(
IClientSessionHandle session,
ListDatabasesOptions options,
CancellationToken cancellationToken = default(CancellationToken))
{
Ensure.IsNotNull(session, nameof(session));
options = options ?? new ListDatabasesOptions();
var messageEncoderSettings = GetMessageEncoderSettings();
var operation = CreateListDatabaseOperation(options, messageEncoderSettings);
return ExecuteReadOperation(session, operation, cancellationToken);
}
/// <inheritdoc/>
public sealed override Task<IAsyncCursor<BsonDocument>> ListDatabasesAsync(
CancellationToken cancellationToken = default(CancellationToken))
{
return UsingImplicitSessionAsync(session => ListDatabasesAsync(session, null, cancellationToken), cancellationToken);
}
/// <inheritdoc/>
public sealed override Task<IAsyncCursor<BsonDocument>> ListDatabasesAsync(
ListDatabasesOptions options,
CancellationToken cancellationToken = default(CancellationToken))
{
return UsingImplicitSessionAsync(session => ListDatabasesAsync(session, options, cancellationToken), cancellationToken);
}
/// <inheritdoc/>
public sealed override Task<IAsyncCursor<BsonDocument>> ListDatabasesAsync(
IClientSessionHandle session,
CancellationToken cancellationToken = default(CancellationToken))
{
return ListDatabasesAsync(session, null, cancellationToken);
}
/// <inheritdoc/>
public sealed override Task<IAsyncCursor<BsonDocument>> ListDatabasesAsync(
IClientSessionHandle session,
ListDatabasesOptions options,
CancellationToken cancellationToken = default(CancellationToken))
{
Ensure.IsNotNull(session, nameof(session));
options = options ?? new ListDatabasesOptions();
var messageEncoderSettings = GetMessageEncoderSettings();
var operation = CreateListDatabaseOperation(options, messageEncoderSettings);
return ExecuteReadOperationAsync(session, operation, cancellationToken);
}
/// <summary>
/// Starts an implicit session.
/// </summary>
/// <returns>A session.</returns>
internal IClientSessionHandle StartImplicitSession(CancellationToken cancellationToken)
{
return StartImplicitSession();
}
/// <summary>
/// Starts an implicit session.
/// </summary>
/// <returns>A Task whose result is a session.</returns>
internal Task<IClientSessionHandle> StartImplicitSessionAsync(CancellationToken cancellationToken)
{
return Task.FromResult(StartImplicitSession());
}
/// <inheritdoc/>
public sealed override IClientSessionHandle StartSession(ClientSessionOptions options = null, CancellationToken cancellationToken = default(CancellationToken))
{
return StartSession(options);
}
/// <inheritdoc/>
public sealed override Task<IClientSessionHandle> StartSessionAsync(ClientSessionOptions options = null, CancellationToken cancellationToken = default(CancellationToken))
{
return Task.FromResult(StartSession(options));
}
/// <inheritdoc/>
public override IChangeStreamCursor<TResult> Watch<TResult>(
PipelineDefinition<ChangeStreamDocument<BsonDocument>, TResult> pipeline,
ChangeStreamOptions options = null,
CancellationToken cancellationToken = default(CancellationToken))
{
return UsingImplicitSession(session => Watch(session, pipeline, options, cancellationToken), cancellationToken);
}
/// <inheritdoc/>
public override IChangeStreamCursor<TResult> Watch<TResult>(
IClientSessionHandle session,
PipelineDefinition<ChangeStreamDocument<BsonDocument>, TResult> pipeline,
ChangeStreamOptions options = null,
CancellationToken cancellationToken = default(CancellationToken))
{
Ensure.IsNotNull(session, nameof(session));
Ensure.IsNotNull(pipeline, nameof(pipeline));
var operation = CreateChangeStreamOperation(pipeline, options);
return ExecuteReadOperation(session, operation, cancellationToken);
}
/// <inheritdoc/>
public override Task<IChangeStreamCursor<TResult>> WatchAsync<TResult>(
PipelineDefinition<ChangeStreamDocument<BsonDocument>, TResult> pipeline,
ChangeStreamOptions options = null,
CancellationToken cancellationToken = default(CancellationToken))
{
return UsingImplicitSessionAsync(session => WatchAsync(session, pipeline, options, cancellationToken), cancellationToken);
}
/// <inheritdoc/>
public override Task<IChangeStreamCursor<TResult>> WatchAsync<TResult>(
IClientSessionHandle session,
PipelineDefinition<ChangeStreamDocument<BsonDocument>, TResult> pipeline,
ChangeStreamOptions options = null,
CancellationToken cancellationToken = default(CancellationToken))
{
Ensure.IsNotNull(session, nameof(session));
Ensure.IsNotNull(pipeline, nameof(pipeline));
var operation = CreateChangeStreamOperation(pipeline, options);
return ExecuteReadOperationAsync(session, operation, cancellationToken);
}
/// <inheritdoc/>
public override IMongoClient WithReadConcern(ReadConcern readConcern)
{
Ensure.IsNotNull(readConcern, nameof(readConcern));
var newSettings = Settings.Clone();
newSettings.ReadConcern = readConcern;
return new MongoClient(_operationExecutor, newSettings);
}
/// <inheritdoc/>
public override IMongoClient WithReadPreference(ReadPreference readPreference)
{
Ensure.IsNotNull(readPreference, nameof(readPreference));
var newSettings = Settings.Clone();
newSettings.ReadPreference = readPreference;
return new MongoClient(_operationExecutor, newSettings);
}
/// <inheritdoc/>
public override IMongoClient WithWriteConcern(WriteConcern writeConcern)
{
Ensure.IsNotNull(writeConcern, nameof(writeConcern));
var newSettings = Settings.Clone();
newSettings.WriteConcern = writeConcern;
return new MongoClient(_operationExecutor, newSettings);
}
// private methods
private IAsyncCursor<string> CreateDatabaseNamesCursor(IAsyncCursor<BsonDocument> cursor)
{
return new BatchTransformingAsyncCursor<BsonDocument, string>(
cursor,
databases => databases.Select(database => database["name"].AsString));
}
private ListDatabasesOperation CreateListDatabaseOperation(
ListDatabasesOptions options,
MessageEncoderSettings messageEncoderSettings)
{
return new ListDatabasesOperation(messageEncoderSettings)
{
AuthorizedDatabases = options.AuthorizedDatabases,
Comment = options.Comment,
Filter = options.Filter?.Render(BsonDocumentSerializer.Instance, BsonSerializer.SerializerRegistry, _linqProvider),
NameOnly = options.NameOnly,
RetryRequested = _settings.RetryReads
};
}
private ListDatabasesOptions CreateListDatabasesOptionsFromListDatabaseNamesOptions(ListDatabaseNamesOptions options)
{
var listDatabasesOptions = new ListDatabasesOptions { NameOnly = true };
if (options != null)
{
listDatabasesOptions.AuthorizedDatabases = options.AuthorizedDatabases;
listDatabasesOptions.Filter = options.Filter;
listDatabasesOptions.Comment = options.Comment;
}
return listDatabasesOptions;
}
private IReadBindingHandle CreateReadBinding(IClientSessionHandle session)
{
var readPreference = _settings.ReadPreference;
if (session.IsInTransaction && readPreference.ReadPreferenceMode != ReadPreferenceMode.Primary)
{
throw new InvalidOperationException("Read preference in a transaction must be primary.");
}
var binding = new ReadPreferenceBinding(_cluster, readPreference, session.WrappedCoreSession.Fork());
return new ReadBindingHandle(binding);
}
private IReadWriteBindingHandle CreateReadWriteBinding(IClientSessionHandle session)
{
var binding = new WritableServerBinding(_cluster, session.WrappedCoreSession.Fork());
return new ReadWriteBindingHandle(binding);
}
private ChangeStreamOperation<TResult> CreateChangeStreamOperation<TResult>(
PipelineDefinition<ChangeStreamDocument<BsonDocument>, TResult> pipeline,
ChangeStreamOptions options)
{
return ChangeStreamHelper.CreateChangeStreamOperation(
pipeline,
_linqProvider,
options,
_settings.ReadConcern,
GetMessageEncoderSettings(),
_settings.RetryReads);
}
private TResult ExecuteReadOperation<TResult>(IClientSessionHandle session, IReadOperation<TResult> operation, CancellationToken cancellationToken = default(CancellationToken))
{
using (var binding = CreateReadBinding(session))
{
return _operationExecutor.ExecuteReadOperation(binding, operation, cancellationToken);
}
}
private async Task<TResult> ExecuteReadOperationAsync<TResult>(IClientSessionHandle session, IReadOperation<TResult> operation, CancellationToken cancellationToken = default(CancellationToken))
{
using (var binding = CreateReadBinding(session))
{
return await _operationExecutor.ExecuteReadOperationAsync(binding, operation, cancellationToken).ConfigureAwait(false);
}
}
private TResult ExecuteWriteOperation<TResult>(IClientSessionHandle session, IWriteOperation<TResult> operation, CancellationToken cancellationToken = default(CancellationToken))
{
using (var binding = CreateReadWriteBinding(session))
{
return _operationExecutor.ExecuteWriteOperation(binding, operation, cancellationToken);
}
}
private async Task<TResult> ExecuteWriteOperationAsync<TResult>(IClientSessionHandle session, IWriteOperation<TResult> operation, CancellationToken cancellationToken = default(CancellationToken))
{
using (var binding = CreateReadWriteBinding(session))
{
return await _operationExecutor.ExecuteWriteOperationAsync(binding, operation, cancellationToken).ConfigureAwait(false);
}
}
private MessageEncoderSettings GetMessageEncoderSettings()
{
var messageEncoderSettings = new MessageEncoderSettings
{
{ MessageEncoderSettingsName.ReadEncoding, _settings.ReadEncoding ?? Utf8Encodings.Strict },
{ MessageEncoderSettingsName.WriteEncoding, _settings.WriteEncoding ?? Utf8Encodings.Strict }
};
#pragma warning disable 618
if (BsonDefaults.GuidRepresentationMode == GuidRepresentationMode.V2)
{
messageEncoderSettings.Add(MessageEncoderSettingsName.GuidRepresentation, _settings.GuidRepresentation);
}
#pragma warning restore 618
ConfigureAutoEncryptionMessageEncoderSettings(messageEncoderSettings);
return messageEncoderSettings;
}
private IClientSessionHandle StartImplicitSession()
{
var options = new ClientSessionOptions { CausalConsistency = false, Snapshot = false };
ICoreSessionHandle coreSession;
#pragma warning disable 618
var areMultipleUsersAuthenticated = _settings.Credentials.Count() > 1;
#pragma warning restore
if (!areMultipleUsersAuthenticated)
{
coreSession = _cluster.StartSession(options.ToCore(isImplicit: true));
}
else
{
coreSession = NoCoreSession.NewHandle();
}
return new ClientSessionHandle(this, options, coreSession);
}
private IClientSessionHandle StartSession(ClientSessionOptions options)
{
if (options != null && options.Snapshot && options.CausalConsistency == true)
{
throw new NotSupportedException("Combining both causal consistency and snapshot options is not supported.");
}
options = options ?? new ClientSessionOptions();
var coreSession = _cluster.StartSession(options.ToCore());
return new ClientSessionHandle(this, options, coreSession);
}
private void UsingImplicitSession(Action<IClientSessionHandle> func, CancellationToken cancellationToken)
{
using (var session = StartImplicitSession(cancellationToken))
{
func(session);
}
}
private TResult UsingImplicitSession<TResult>(Func<IClientSessionHandle, TResult> func, CancellationToken cancellationToken)
{
using (var session = StartImplicitSession(cancellationToken))
{
return func(session);
}
}
private async Task UsingImplicitSessionAsync(Func<IClientSessionHandle, Task> funcAsync, CancellationToken cancellationToken)
{
using (var session = await StartImplicitSessionAsync(cancellationToken).ConfigureAwait(false))
{
await funcAsync(session).ConfigureAwait(false);
}
}
private async Task<TResult> UsingImplicitSessionAsync<TResult>(Func<IClientSessionHandle, Task<TResult>> funcAsync, CancellationToken cancellationToken)
{
using (var session = await StartImplicitSessionAsync(cancellationToken).ConfigureAwait(false))
{
return await funcAsync(session).ConfigureAwait(false);
}
}
}
}