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
|
/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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.
*/
#pragma once
#include <boost/shared_array.hpp>
#include <map>
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/storage/record_store.h"
#include "mongo/platform/mutex.h"
#include "mongo/util/concurrency/with_lock.h"
namespace mongo {
/**
* A RecordStore that stores all data in-memory.
*
* @param cappedMaxSize - required if isCapped. limit uses dataSize() in this impl.
*/
class EphemeralForTestRecordStore : public RecordStore {
public:
explicit EphemeralForTestRecordStore(StringData ns,
StringData identName,
std::shared_ptr<void>* dataInOut,
bool isCapped = false);
virtual const char* name() const;
virtual KeyFormat keyFormat() const {
return KeyFormat::Long;
}
virtual RecordData dataFor(OperationContext* opCtx, const RecordId& loc) const;
virtual bool findRecord(OperationContext* opCtx, const RecordId& loc, RecordData* rd) const;
void doDeleteRecord(OperationContext* opCtx, const RecordId& dl) override;
Status doInsertRecords(OperationContext* opCtx,
std::vector<Record>* inOutRecords,
const std::vector<Timestamp>& timestamps) override;
Status doUpdateRecord(OperationContext* opCtx,
const RecordId& oldLocation,
const char* data,
int len) override;
virtual bool updateWithDamagesSupported() const;
StatusWith<RecordData> doUpdateWithDamages(OperationContext* opCtx,
const RecordId& loc,
const RecordData& oldRec,
const char* damageSource,
const mutablebson::DamageVector& damages) override;
virtual void printRecordMetadata(OperationContext* opCtx, const RecordId& recordId) const {}
std::unique_ptr<SeekableRecordCursor> getCursor(OperationContext* opCtx,
bool forward) const final;
Status doTruncate(OperationContext* opCtx) override;
void doCappedTruncateAfter(OperationContext* opCtx,
const RecordId& end,
bool inclusive,
const AboutToDeleteRecordCallback& aboutToDelete) override;
virtual void appendNumericCustomStats(OperationContext* opCtx,
BSONObjBuilder* result,
double scale) const {}
virtual int64_t storageSize(OperationContext* opCtx,
BSONObjBuilder* extraInfo = nullptr,
int infoLevel = 0) const;
virtual long long dataSize(OperationContext* opCtx) const {
return _data->dataSize;
}
virtual long long numRecords(OperationContext* opCtx) const {
return _data->records.size();
}
virtual void updateStatsAfterRepair(OperationContext* opCtx,
long long numRecords,
long long dataSize) {
stdx::lock_guard<stdx::recursive_mutex> lock(_data->recordsMutex);
invariant(_data->records.size() == size_t(numRecords));
_data->dataSize = dataSize;
}
protected:
struct EphemeralForTestRecord {
EphemeralForTestRecord() : size(0) {}
EphemeralForTestRecord(int size) : size(size), data(new char[size]) {}
RecordData toRecordData() const {
return RecordData(data.get(), size);
}
int size;
boost::shared_array<char> data;
};
virtual const EphemeralForTestRecord* recordFor(WithLock, const RecordId& loc) const;
virtual EphemeralForTestRecord* recordFor(WithLock, const RecordId& loc);
void waitForAllEarlierOplogWritesToBeVisibleImpl(OperationContext* opCtx) const override {}
public:
//
// Not in RecordStore interface
//
typedef std::map<RecordId, EphemeralForTestRecord> Records;
bool isCapped() const {
return _isCapped;
}
private:
class RemoveChange;
class TruncateChange;
class Cursor;
class ReverseCursor;
StatusWith<RecordId> extractAndCheckLocForOplog(WithLock, const char* data, int len) const;
RecordId allocateLoc(WithLock);
void deleteRecord(WithLock lk, OperationContext* opCtx, const RecordId& dl);
const bool _isCapped;
// This is the "persistent" data.
struct Data {
Data(StringData ns, bool isOplog)
: dataSize(0), recordsMutex(), nextId(1), isOplog(isOplog) {}
int64_t dataSize;
stdx::recursive_mutex recordsMutex;
Records records;
int64_t nextId;
const bool isOplog;
};
Data* const _data;
};
} // namespace mongo
|
