-
Notifications
You must be signed in to change notification settings - Fork 1.2k
/
ListDatabasesOperation.cs
182 lines (165 loc) · 5.71 KB
/
ListDatabasesOperation.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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
/* 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;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MongoDB.Bson;
using MongoDB.Bson.Serialization.Serializers;
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 the listDatabases command.
/// </summary>
public class ListDatabasesOperation : IReadOperation<IAsyncCursor<BsonDocument>>
{
// fields
private bool? _authorizedDatabases;
private BsonValue _comment;
private BsonDocument _filter;
private MessageEncoderSettings _messageEncoderSettings;
private bool? _nameOnly;
private bool _retryRequested;
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="ListDatabasesOperation"/> class.
/// </summary>
/// <param name="messageEncoderSettings">The message encoder settings.</param>
public ListDatabasesOperation(MessageEncoderSettings messageEncoderSettings)
{
_messageEncoderSettings = messageEncoderSettings;
}
// properties
/// <summary>
/// Gets or sets the AuthorizedDatabases flag.
/// </summary>
/// <value>
/// The AuthorizedDatabases flag.
/// </value>
public bool? AuthorizedDatabases
{
get { return _authorizedDatabases; }
set { _authorizedDatabases = value; }
}
/// <summary>
/// Gets or sets the comment.
/// </summary>
/// <value>
/// The comment.
/// </value>
public BsonValue Comment
{
get { return _comment; }
set { _comment = value; }
}
/// <summary>
/// Gets or sets the filter.
/// </summary>
/// <value>
/// The filter.
/// </value>
public BsonDocument Filter
{
get { return _filter; }
set { _filter = value; }
}
/// <summary>
/// Gets the message encoder settings.
/// </summary>
/// <value>
/// The message encoder settings.
/// </value>
public MessageEncoderSettings MessageEncoderSettings
{
get { return _messageEncoderSettings; }
}
/// <summary>
/// Gets or sets the NameOnly flag.
/// </summary>
/// <value>
/// The NameOnly flag.
/// </value>
public bool? NameOnly
{
get { return _nameOnly; }
set { _nameOnly = value; }
}
/// <summary>
/// Gets or sets whether or not retry was requested.
/// </summary>
/// <value>
/// Whether retry was requested.
/// </value>
public bool RetryRequested
{
get { return _retryRequested; }
set { _retryRequested = value; }
}
// public methods
/// <inheritdoc/>
public IAsyncCursor<BsonDocument> Execute(IReadBinding binding, CancellationToken cancellationToken)
{
Ensure.IsNotNull(binding, nameof(binding));
using (BeginOperation())
{
var operation = CreateOperation();
var reply = operation.Execute(binding, cancellationToken);
return CreateCursor(reply);
}
}
/// <inheritdoc/>
public async Task<IAsyncCursor<BsonDocument>> ExecuteAsync(IReadBinding binding, CancellationToken cancellationToken)
{
Ensure.IsNotNull(binding, nameof(binding));
using (BeginOperation())
{
var operation = CreateOperation();
var reply = await operation.ExecuteAsync(binding, cancellationToken).ConfigureAwait(false);
return CreateCursor(reply);
}
}
// private methods
internal BsonDocument CreateCommand()
{
return new BsonDocument
{
{ "listDatabases", 1 },
{ "filter", _filter, _filter != null },
{ "nameOnly", _nameOnly, _nameOnly != null },
{ "authorizedDatabases", _authorizedDatabases, _authorizedDatabases != null },
{ "comment", _comment, _comment != null }
};
}
// private methods
private IDisposable BeginOperation() => EventContext.BeginOperation(null, "listDatabases");
private IAsyncCursor<BsonDocument> CreateCursor(BsonDocument reply)
{
var databases = reply["databases"].AsBsonArray.OfType<BsonDocument>();
return new SingleBatchAsyncCursor<BsonDocument>(databases.ToList());
}
private ReadCommandOperation<BsonDocument> CreateOperation()
{
var command = CreateCommand();
return new ReadCommandOperation<BsonDocument>(DatabaseNamespace.Admin, command, BsonDocumentSerializer.Instance, _messageEncoderSettings)
{
RetryRequested = _retryRequested
};
}
}
}