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
|
/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/dbmessage.h"
#include "mongo/db/jsobj.h"
#include "mongo/rpc/legacy_reply_builder.h"
#include "mongo/rpc/metadata.h"
#include "mongo/stdx/memory.h"
#include "mongo/util/assert_util.h"
namespace mongo {
namespace rpc {
LegacyReplyBuilder::LegacyReplyBuilder()
: LegacyReplyBuilder(stdx::make_unique<Message>())
{}
LegacyReplyBuilder::LegacyReplyBuilder(std::unique_ptr<Message> message)
: _message{std::move(message)} {
_builder.skip(sizeof(QueryResult::Value));
}
LegacyReplyBuilder::~LegacyReplyBuilder() {}
LegacyReplyBuilder& LegacyReplyBuilder::setMetadata(BSONObj metadata) {
invariant(_state == State::kMetadata);
_metadata = std::move(metadata);
_state = State::kCommandReply;
return *this;
}
LegacyReplyBuilder& LegacyReplyBuilder::setRawCommandReply(BSONObj commandReply) {
invariant(_state == State::kCommandReply);
BSONObj downconvertedCommandReply = uassertStatusOK(
rpc::downconvertReplyMetadata(std::move(commandReply), std::move(_metadata))
);
downconvertedCommandReply.appendSelfToBufBuilder(_builder);
_state = State::kOutputDocs;
return *this;
}
LegacyReplyBuilder& LegacyReplyBuilder::addOutputDocs(DocumentRange outputDocs) {
invariant(_state == State::kOutputDocs);
// no op
return *this;
}
LegacyReplyBuilder& LegacyReplyBuilder::addOutputDoc(BSONObj outputDoc) {
invariant(_state == State::kOutputDocs);
// no op
return *this;
}
ReplyBuilderInterface::State LegacyReplyBuilder::getState() const {
return _state;
}
Protocol LegacyReplyBuilder::getProtocol() const {
return rpc::Protocol::kOpQuery;
}
void LegacyReplyBuilder::reset() {
// If we are in State::kMetadata, we are already in the 'start' state, so by
// immediately returning, we save a heap allocation.
if (_state == State::kMetadata) {
return;
}
_builder.reset();
_metadata = BSONObj();
_message = stdx::make_unique<Message>();
_state = State::kMetadata;
}
std::unique_ptr<Message> LegacyReplyBuilder::done() {
invariant(_state == State::kOutputDocs);
std::unique_ptr<Message> message = stdx::make_unique<Message>();
QueryResult::View qr = _builder.buf();
qr.setResultFlagsToOk();
qr.msgdata().setLen(_builder.len());
qr.msgdata().setOperation(opReply);
qr.setCursorId(0);
qr.setStartingFrom(0);
qr.setNReturned(1);
_builder.decouple();
message->setData(qr.view2ptr(), true);
_state = State::kDone;
return std::move(message);
}
std::size_t LegacyReplyBuilder::availableSpaceForOutputDocs() const {
invariant (State::kDone != _state);
// LegacyReplyBuilder currently does not support addOutputDoc(s)
return 0u;
}
} // namespace rpc
} // namespace mongo
|
