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BulkMixedWriteOperation.cs
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BulkMixedWriteOperation.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.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MongoDB.Bson;
using MongoDB.Driver.Core.Bindings;
using MongoDB.Driver.Core.Connections;
using MongoDB.Driver.Core.Events;
using MongoDB.Driver.Core.Misc;
using MongoDB.Driver.Core.WireProtocol.Messages.Encoders;
namespace MongoDB.Driver.Core.Operations
{
/// <summary>
/// Represents a mixed write bulk operation.
/// </summary>
public class BulkMixedWriteOperation : IWriteOperation<BulkWriteOperationResult>
{
// fields
private bool? _bypassDocumentValidation;
private readonly CollectionNamespace _collectionNamespace;
private BsonValue _comment;
private bool _isOrdered = true;
private BsonDocument _let;
private int? _maxBatchCount;
private int? _maxBatchLength;
private int? _maxDocumentSize;
private int? _maxWireDocumentSize;
private readonly MessageEncoderSettings _messageEncoderSettings;
private readonly List<WriteRequest> _requests;
private bool _retryRequested;
private WriteConcern _writeConcern;
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="BulkMixedWriteOperation"/> class.
/// </summary>
/// <param name="collectionNamespace">The collection namespace.</param>
/// <param name="requests">The requests.</param>
/// <param name="messageEncoderSettings">The message encoder settings.</param>
public BulkMixedWriteOperation(
CollectionNamespace collectionNamespace,
IEnumerable<WriteRequest> requests,
MessageEncoderSettings messageEncoderSettings)
: this(collectionNamespace, Ensure.IsNotNull(requests, nameof(requests)).ToList(), messageEncoderSettings)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="BulkMixedWriteOperation"/> class.
/// </summary>
/// <param name="collectionNamespace">The collection namespace.</param>
/// <param name="requests">The requests.</param>
/// <param name="messageEncoderSettings">The message encoder settings.</param>
public BulkMixedWriteOperation(
CollectionNamespace collectionNamespace,
List<WriteRequest> requests,
MessageEncoderSettings messageEncoderSettings)
{
_collectionNamespace = Ensure.IsNotNull(collectionNamespace, nameof(collectionNamespace));
_requests = Ensure.IsNotNull(requests, nameof(requests));
_messageEncoderSettings = Ensure.IsNotNull(messageEncoderSettings, nameof(messageEncoderSettings));
_writeConcern = WriteConcern.Acknowledged;
}
// 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 or sets the comment.
/// </summary>
/// <value>
/// The comment.
/// </value>
public BsonValue Comment
{
get { return _comment; }
set { _comment = value; }
}
/// <summary>
/// Gets or sets a value indicating whether the writes must be performed in order.
/// </summary>
/// <value>
/// <c>true</c> if the writes must be performed in order; otherwise, <c>false</c>.
/// </value>
public bool IsOrdered
{
get { return _isOrdered; }
set { _isOrdered = value; }
}
/// <summary>
/// Gets or sets the let document.
/// </summary>
/// <value>
/// The let document.
/// </value>
public BsonDocument Let
{
get { return _let; }
set { _let = value; }
}
/// <summary>
/// Gets or sets the maximum number of documents in a batch.
/// </summary>
/// <value>
/// The maximum number of documents in a batch.
/// </value>
public int? MaxBatchCount
{
get { return _maxBatchCount; }
set { _maxBatchCount = Ensure.IsNullOrGreaterThanZero(value, nameof(value)); }
}
/// <summary>
/// Gets or sets the maximum length of a batch.
/// </summary>
/// <value>
/// The maximum length of a batch.
/// </value>
public int? MaxBatchLength
{
get { return _maxBatchLength; }
set { _maxBatchLength = Ensure.IsNullOrGreaterThanZero(value, nameof(value)); }
}
/// <summary>
/// Gets or sets the maximum size of a document.
/// </summary>
/// <value>
/// The maximum size of a document.
/// </value>
public int? MaxDocumentSize
{
get { return _maxDocumentSize; }
set { _maxDocumentSize = Ensure.IsNullOrGreaterThanZero(value, nameof(value)); }
}
/// <summary>
/// Gets or sets the maximum size of a wire document.
/// </summary>
/// <value>
/// The maximum size of a wire document.
/// </value>
public int? MaxWireDocumentSize
{
get { return _maxWireDocumentSize; }
set { _maxWireDocumentSize = Ensure.IsNullOrGreaterThanZero(value, nameof(value)); }
}
/// <summary>
/// Gets the message encoder settings.
/// </summary>
/// <value>
/// The message encoder settings.
/// </value>
public MessageEncoderSettings MessageEncoderSettings
{
get { return _messageEncoderSettings; }
}
/// <summary>
/// Gets the requests.
/// </summary>
/// <value>
/// The requests.
/// </value>
public IEnumerable<WriteRequest> Requests
{
get { return _requests; }
}
/// <summary>
/// Gets or sets a value indicating whether [retry requested].
/// </summary>
/// <value>
/// <c>true</c> if [retry requested]; otherwise, <c>false</c>.
/// </value>
public bool RetryRequested
{
get { return _retryRequested; }
set { _retryRequested = value; }
}
/// <summary>
/// Gets or sets the write concern.
/// </summary>
/// <value>
/// The write concern.
/// </value>
public WriteConcern WriteConcern
{
get { return _writeConcern; }
set { _writeConcern = Ensure.IsNotNull(value, nameof(value)); }
}
// public methods
/// <inheritdoc/>
public BulkWriteOperationResult Execute(IWriteBinding binding, CancellationToken cancellationToken)
{
using (BeginOperation())
using (var context = RetryableWriteContext.Create(binding, _retryRequested, cancellationToken))
{
EnsureHintIsSupportedIfAnyRequestHasHint();
context.DisableRetriesIfAnyWriteRequestIsNotRetryable(_requests);
var helper = new BatchHelper(_requests, _isOrdered, _writeConcern);
foreach (var batch in helper.GetBatches())
{
batch.Result = ExecuteBatch(context, batch, cancellationToken);
}
return helper.GetFinalResultOrThrow(context.Channel.ConnectionDescription.ConnectionId);
}
}
/// <inheritdoc/>
public async Task<BulkWriteOperationResult> ExecuteAsync(IWriteBinding binding, CancellationToken cancellationToken)
{
using (BeginOperation())
using (var context = await RetryableWriteContext.CreateAsync(binding, _retryRequested, cancellationToken).ConfigureAwait(false))
{
EnsureHintIsSupportedIfAnyRequestHasHint();
context.DisableRetriesIfAnyWriteRequestIsNotRetryable(_requests);
var helper = new BatchHelper(_requests, _isOrdered, _writeConcern);
foreach (var batch in helper.GetBatches())
{
batch.Result = await ExecuteBatchAsync(context, batch, cancellationToken).ConfigureAwait(false);
}
return helper.GetFinalResultOrThrow(context.Channel.ConnectionDescription.ConnectionId);
}
}
// private methods
private IDisposable BeginOperation() =>
// Execution starts with the first request
EventContext.BeginOperation(null, _requests.FirstOrDefault()?.RequestType.ToString().ToLower());
private IExecutableInRetryableWriteContext<BulkWriteOperationResult> CreateBulkDeleteOperation(Batch batch)
{
var requests = batch.Requests.Cast<DeleteRequest>();
return new BulkDeleteOperation(_collectionNamespace, requests, _messageEncoderSettings)
{
Comment = _comment,
IsOrdered = _isOrdered,
Let = _let,
MaxBatchCount = _maxBatchCount,
MaxBatchLength = _maxBatchLength,
WriteConcern = batch.WriteConcern,
RetryRequested = _retryRequested
};
}
private IExecutableInRetryableWriteContext<BulkWriteOperationResult> CreateBulkInsertOperation(Batch batch)
{
var requests = batch.Requests.Cast<InsertRequest>();
return new BulkInsertOperation(_collectionNamespace, requests, _messageEncoderSettings)
{
BypassDocumentValidation = _bypassDocumentValidation,
Comment = _comment,
IsOrdered = _isOrdered,
MaxBatchCount = _maxBatchCount,
MaxBatchLength = _maxBatchLength,
MessageEncoderSettings = _messageEncoderSettings,
WriteConcern = batch.WriteConcern,
RetryRequested = _retryRequested
};
}
private IExecutableInRetryableWriteContext<BulkWriteOperationResult> CreateBulkUpdateOperation(Batch batch)
{
var requests = batch.Requests.Cast<UpdateRequest>();
return new BulkUpdateOperation(_collectionNamespace, requests, _messageEncoderSettings)
{
BypassDocumentValidation = _bypassDocumentValidation,
Comment = _comment,
IsOrdered = _isOrdered,
Let = _let,
MaxBatchCount = _maxBatchCount,
MaxBatchLength = _maxBatchLength,
WriteConcern = batch.WriteConcern,
RetryRequested = _retryRequested
};
}
private IExecutableInRetryableWriteContext<BulkWriteOperationResult> CreateUnmixedBatchOperation(Batch batch)
{
switch (batch.BatchType)
{
case WriteRequestType.Delete: return CreateBulkDeleteOperation(batch);
case WriteRequestType.Insert: return CreateBulkInsertOperation(batch);
case WriteRequestType.Update: return CreateBulkUpdateOperation(batch);
default: throw new ArgumentException("Invalid batch type.", nameof(batch));
}
}
private void EnsureHintIsSupportedIfAnyRequestHasHint()
{
foreach (var request in _requests)
{
if (RequestHasHint(request) && !_writeConcern.IsAcknowledged)
{
throw new NotSupportedException("Hint is not supported for unacknowledged writes.");
}
}
}
private BulkWriteBatchResult ExecuteBatch(RetryableWriteContext context, Batch batch, CancellationToken cancellationToken)
{
BulkWriteOperationResult result;
MongoBulkWriteOperationException exception = null;
try
{
var operation = CreateUnmixedBatchOperation(batch);
result = operation.Execute(context, cancellationToken);
}
catch (MongoBulkWriteOperationException ex)
{
result = ex.Result;
exception = ex;
}
return BulkWriteBatchResult.Create(result, exception, batch.IndexMap);
}
private async Task<BulkWriteBatchResult> ExecuteBatchAsync(RetryableWriteContext context, Batch batch, CancellationToken cancellationToken)
{
BulkWriteOperationResult result;
MongoBulkWriteOperationException exception = null;
try
{
var operation = CreateUnmixedBatchOperation(batch);
result = await operation.ExecuteAsync(context, cancellationToken).ConfigureAwait(false);
}
catch (MongoBulkWriteOperationException ex)
{
result = ex.Result;
exception = ex;
}
return BulkWriteBatchResult.Create(result, exception, batch.IndexMap);
}
private bool RequestHasHint(WriteRequest request)
{
if (request is DeleteRequest deleteRequest)
{
return deleteRequest.Hint != null;
}
if (request is UpdateRequest updateRequest)
{
return updateRequest.Hint != null;
}
return false;
}
// nested types
private class Batch
{
public WriteRequestType BatchType;
public List<WriteRequest> Requests;
public IndexMap IndexMap;
public WriteConcern WriteConcern;
public BulkWriteBatchResult Result;
}
private class BatchHelper
{
// private fields
private readonly List<BulkWriteBatchResult> _batchResults = new List<BulkWriteBatchResult>();
private bool _hasWriteErrors;
private readonly bool _isOrdered;
private List<WriteRequestWithIndex> _unprocessed;
private WriteConcern _writeConcern;
// constructors
public BatchHelper(IEnumerable<WriteRequest> requests, bool ordered, WriteConcern writeConcern)
{
Ensure.IsNotNull(requests, nameof(requests));
_isOrdered = ordered;
_writeConcern = writeConcern;
_unprocessed = new List<WriteRequestWithIndex>();
var index = 0;
foreach (var request in requests)
{
_unprocessed.Add(new WriteRequestWithIndex { Index = index++, Request = request });
}
}
// public methods
public IEnumerable<Batch> GetBatches()
{
if (_unprocessed.Count == 0)
{
throw new InvalidOperationException("Bulk write operation is empty.");
}
while (_unprocessed.Count > 0 && ShouldContinue())
{
var batch = GetNextBatch();
yield return batch;
_batchResults.Add(batch.Result);
_hasWriteErrors |= batch.Result.HasWriteErrors;
}
}
public BulkWriteOperationResult GetFinalResultOrThrow(ConnectionId connectionId)
{
var combiner = new BulkWriteBatchResultCombiner(_batchResults, _writeConcern.IsAcknowledged);
return combiner.CreateResultOrThrowIfHasErrors(connectionId, _unprocessed.Select(r => r.Request).ToList());
}
// private methods
private Batch GetNextBatch()
{
var batchType = _unprocessed[0].Request.RequestType;
List<WriteRequest> requests;
IndexMap indexMap;
if (_isOrdered)
{
var index = _unprocessed.FindIndex(r => r.Request.RequestType != batchType);
var count = index == -1 ? _unprocessed.Count : index;
requests = _unprocessed.Take(count).Select(r => r.Request).ToList();
indexMap = new IndexMap.RangeBased(0, _unprocessed[0].Index, count);
_unprocessed.RemoveRange(0, count);
}
else
{
var matching = _unprocessed.Where(r => r.Request.RequestType == batchType).ToList();
requests = matching.Select(r => r.Request).ToList();
indexMap = new IndexMap.DictionaryBased();
for (var i = 0; i < matching.Count; i++)
{
indexMap.Add(i, matching[i].Index);
}
_unprocessed = _unprocessed.Where(r => r.Request.RequestType != batchType).ToList();
}
var writeConcern = _writeConcern;
if (!writeConcern.IsAcknowledged && _isOrdered && _unprocessed.Count > 0)
{
writeConcern = WriteConcern.W1; // explicitly do not use the server's default
}
return new Batch
{
BatchType = batchType,
Requests = requests,
IndexMap = indexMap,
WriteConcern = writeConcern
};
}
private bool ShouldContinue()
{
return !_hasWriteErrors || !_isOrdered;
}
private struct WriteRequestWithIndex
{
public WriteRequest Request;
public int Index;
}
}
}
}