-
Notifications
You must be signed in to change notification settings - Fork 1.2k
/
ReadCommandOperation.cs
121 lines (107 loc) · 4.71 KB
/
ReadCommandOperation.cs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
/* Copyright 2013-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.Threading;
using System.Threading.Tasks;
using MongoDB.Bson;
using MongoDB.Bson.Serialization;
using MongoDB.Driver.Core.Bindings;
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 read command operation.
/// </summary>
/// <typeparam name="TCommandResult">The type of the command result.</typeparam>
public class ReadCommandOperation<TCommandResult> : CommandOperationBase<TCommandResult>, IReadOperation<TCommandResult>, IRetryableReadOperation<TCommandResult>
{
// private fields
private bool _retryRequested;
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="ReadCommandOperation{TCommandResult}"/> class.
/// </summary>
/// <param name="databaseNamespace">The database namespace.</param>
/// <param name="command">The command.</param>
/// <param name="resultSerializer">The result serializer.</param>
/// <param name="messageEncoderSettings">The message encoder settings.</param>
public ReadCommandOperation(
DatabaseNamespace databaseNamespace,
BsonDocument command,
IBsonSerializer<TCommandResult> resultSerializer,
MessageEncoderSettings messageEncoderSettings)
: base(databaseNamespace, command, resultSerializer, messageEncoderSettings)
{
}
// public properties
/// <summary>
/// Gets or sets a value indicating whether to retry.
/// </summary>
/// <value>Whether to retry.</value>
public bool RetryRequested
{
get => _retryRequested;
set => _retryRequested = value;
}
// public methods
/// <inheritdoc/>
public TCommandResult Execute(IReadBinding binding, CancellationToken cancellationToken)
{
Ensure.IsNotNull(binding, nameof(binding));
using (var context = RetryableReadContext.Create(binding, _retryRequested, cancellationToken))
{
return Execute(context, cancellationToken);
}
}
/// <inheritdoc/>
public TCommandResult Execute(RetryableReadContext context, CancellationToken cancellationToken)
{
Ensure.IsNotNull(context, nameof(context));
using (EventContext.BeginOperation())
{
return RetryableReadOperationExecutor.Execute(this, context, cancellationToken);
}
}
/// <inheritdoc/>
public async Task<TCommandResult> ExecuteAsync(IReadBinding binding, CancellationToken cancellationToken)
{
Ensure.IsNotNull(binding, nameof(binding));
using (var context = await RetryableReadContext.CreateAsync(binding, _retryRequested, cancellationToken).ConfigureAwait(false))
{
return await ExecuteAsync(context, cancellationToken).ConfigureAwait(false);
}
}
/// <inheritdoc/>
public async Task<TCommandResult> ExecuteAsync(RetryableReadContext context, CancellationToken cancellationToken)
{
Ensure.IsNotNull(context, nameof(context));
using (EventContext.BeginOperation())
{
return await RetryableReadOperationExecutor.ExecuteAsync(this, context, cancellationToken).ConfigureAwait(false);
}
}
/// <inheritdoc/>
public TCommandResult ExecuteAttempt(RetryableReadContext context, int attempt, long? transactionNumber, CancellationToken cancellationToken)
{
return ExecuteProtocol(context.Channel, context.Binding.Session, context.Binding.ReadPreference, cancellationToken);
}
/// <inheritdoc/>
public Task<TCommandResult> ExecuteAttemptAsync(RetryableReadContext context, int attempt, long? transactionNumber, CancellationToken cancellationToken)
{
return ExecuteProtocolAsync(context.Channel, context.Binding.Session, context.Binding.ReadPreference, cancellationToken);
}
}
}