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RetryableInsertCommandOperation.cs
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RetryableInsertCommandOperation.cs
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/* Copyright 2017-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.Collections.Generic;
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.Misc;
using MongoDB.Driver.Core.WireProtocol.Messages;
using MongoDB.Driver.Core.WireProtocol.Messages.Encoders;
namespace MongoDB.Driver.Core.Operations
{
/// <summary>
/// Represents an insert command operation.
/// </summary>
/// <typeparam name="TDocument">The type of the document.</typeparam>
public class RetryableInsertCommandOperation<TDocument> : RetryableWriteCommandOperationBase where TDocument : class
{
// private fields
private bool? _bypassDocumentValidation;
private readonly CollectionNamespace _collectionNamespace;
private readonly BatchableSource<TDocument> _documents;
private readonly IBsonSerializer<TDocument> _documentSerializer;
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="RetryableInsertCommandOperation{TDocument}"/> class.
/// </summary>
/// <param name="collectionNamespace">The collection namespace.</param>
/// <param name="documents">The documents.</param>
/// <param name="documentSerializer">The document serializer.</param>
/// <param name="messageEncoderSettings">The message encoder settings.</param>
public RetryableInsertCommandOperation(
CollectionNamespace collectionNamespace,
BatchableSource<TDocument> documents,
IBsonSerializer<TDocument> documentSerializer,
MessageEncoderSettings messageEncoderSettings)
: base(Ensure.IsNotNull(collectionNamespace, nameof(collectionNamespace)).DatabaseNamespace, messageEncoderSettings)
{
_collectionNamespace = Ensure.IsNotNull(collectionNamespace, nameof(collectionNamespace));
_documents = Ensure.IsNotNull(documents, nameof(documents));
_documentSerializer = Ensure.IsNotNull(documentSerializer, nameof(documentSerializer));
}
// public properties
/// <summary>
/// Gets or sets a value indicating whether to bypass document validation.
/// </summary>
/// <value>
/// A value indicating whether to bypass document validation.
/// </value>
public bool? BypassDocumentValidation
{
get { return _bypassDocumentValidation; }
set { _bypassDocumentValidation = value; }
}
/// <summary>
/// Gets the collection namespace.
/// </summary>
/// <value>
/// The collection namespace.
/// </value>
public CollectionNamespace CollectionNamespace
{
get { return _collectionNamespace; }
}
/// <summary>
/// Gets the documents.
/// </summary>
/// <value>
/// The documents.
/// </value>
public BatchableSource<TDocument> Documents
{
get { return _documents; }
}
/// <summary>
/// Gets the document serializer.
/// </summary>
/// <value>
/// The document serializer.
/// </value>
public IBsonSerializer<TDocument> DocumentSerializer
{
get { return _documentSerializer; }
}
// protected methods
/// <inheritdoc />
protected override BsonDocument CreateCommand(ICoreSessionHandle session, int attempt, long? transactionNumber)
{
var writeConcern = WriteConcernHelper.GetEffectiveWriteConcern(session, WriteConcern);
return new BsonDocument
{
{ "insert", _collectionNamespace.CollectionName },
{ "ordered", IsOrdered },
{ "bypassDocumentValidation", () => _bypassDocumentValidation, _bypassDocumentValidation.HasValue },
{ "comment", Comment, Comment != null },
{ "writeConcern", writeConcern, writeConcern != null },
{ "txnNumber", () => transactionNumber.Value, transactionNumber.HasValue }
};
}
/// <inheritdoc />
protected override IEnumerable<Type1CommandMessageSection> CreateCommandPayloads(IChannelHandle channel, int attempt)
{
BatchableSource<TDocument> documents;
if (attempt == 1)
{
documents = _documents;
}
else
{
documents = new BatchableSource<TDocument>(_documents.Items, _documents.Offset, _documents.ProcessedCount, canBeSplit: false);
}
var elementNameValidator = NoOpElementNameValidator.Instance;
var maxBatchCount = Math.Min(MaxBatchCount ?? int.MaxValue, channel.ConnectionDescription.MaxBatchCount);
var maxDocumentSize = channel.ConnectionDescription.MaxDocumentSize;
var payload = new Type1CommandMessageSection<TDocument>("documents", documents, _documentSerializer, elementNameValidator, maxBatchCount, maxDocumentSize);
return new Type1CommandMessageSection[] { payload };
}
// nested types
private class InsertSerializer : SerializerBase<TDocument>
{
// private fields
private IBsonSerializer _cachedSerializer;
private readonly IBsonSerializer<TDocument> _documentSerializer;
// constructors
public InsertSerializer(IBsonSerializer<TDocument> documentSerializer)
{
_documentSerializer = documentSerializer;
_cachedSerializer = documentSerializer;
}
// public methods
public override void Serialize(BsonSerializationContext context, BsonSerializationArgs args, TDocument value)
{
IBsonSerializer serializer;
var actualType = value.GetType();
if (actualType == typeof(TDocument))
{
serializer = _documentSerializer;
}
else
{
if (_cachedSerializer.ValueType != actualType)
{
_cachedSerializer = BsonSerializer.LookupSerializer(actualType);
}
serializer = _cachedSerializer;
}
serializer.Serialize(context, value);
}
}
}
}