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
|
/**
* Copyright (C) 2008 10gen 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.
*/
#pragma once
#include <string>
#include <vector>
#include "mongo/base/status.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/timestamp.h"
#include "mongo/db/repl/optime.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/stdx/functional.h"
namespace mongo {
class Collection;
class Database;
class NamespaceString;
class OperationContext;
namespace repl {
class ReplSettings;
/**
* Truncates the oplog after, and including, the "truncateTimestamp" entry.
*/
void truncateOplogTo(OperationContext* txn, Timestamp truncateTimestamp);
/**
* Create a new capped collection for the oplog if it doesn't yet exist.
* If the collection already exists (and isReplSet is false),
* set the 'last' Timestamp from the last entry of the oplog collection (side effect!)
*/
void createOplog(OperationContext* txn, const std::string& oplogCollectionName, bool isReplSet);
/*
* Shortcut for above function using oplogCollectionName = _oplogCollectionName,
* and replEnabled = replCoord::isReplSet();
*/
void createOplog(OperationContext* txn);
extern std::string rsOplogName;
extern std::string masterSlaveOplogName;
extern int OPLOG_VERSION;
/* Log operation(s) to the local oplog
*
* @param opstr
* "i" insert
* "u" update
* "d" delete
* "c" db cmd
* "n" no-op
* "db" declares presence of a database (ns is set to the db name + '.')
*/
void logOps(OperationContext* txn,
const char* opstr,
const NamespaceString& nss,
std::vector<BSONObj>::const_iterator begin,
std::vector<BSONObj>::const_iterator end,
bool fromMigrate);
/* For 'u' records, 'obj' captures the mutation made to the object but not
* the object itself. 'o2' captures the the criteria for the object that will be modified.
*/
void logOp(OperationContext* txn,
const char* opstr,
const char* ns,
const BSONObj& obj,
const BSONObj* o2,
bool fromMigrate);
// Flush out the cached pointers to the local database and oplog.
// Used by the closeDatabase command to ensure we don't cache closed things.
void oplogCheckCloseDatabase(OperationContext* txn, Database* db);
using IncrementOpsAppliedStatsFn = stdx::function<void()>;
/**
* Take a non-command op and apply it locally
* Used for applying from an oplog
* @param inSteadyStateReplication convert some updates to upserts for idempotency reasons
* @param incrementOpsAppliedStats is called whenever an op is applied.
* Returns failure status if the op was an update that could not be applied.
*/
Status applyOperation_inlock(OperationContext* txn,
Database* db,
const BSONObj& op,
bool inSteadyStateReplication = false,
IncrementOpsAppliedStatsFn incrementOpsAppliedStats = {});
/**
* Take a command op and apply it locally
* Used for applying from an oplog
* inSteadyStateReplication indicates whether we are in steady state replication, rather than
* initial sync.
* Returns failure status if the op that could not be applied.
*/
Status applyCommand_inlock(OperationContext* txn, const BSONObj& op, bool inSteadyStateReplication);
/**
* Initializes the global Timestamp with the value from the timestamp of the last oplog entry.
*/
void initTimestampFromOplog(OperationContext* txn, const std::string& oplogNS);
/**
* Sets the global Timestamp to be 'newTime'.
*/
void setNewTimestamp(ServiceContext* txn, const Timestamp& newTime);
/**
* Detects the current replication mode and sets the "_oplogCollectionName" accordingly.
*/
void setOplogCollectionName();
/**
* Signal any waiting AwaitData queries on the oplog that there is new data or metadata available.
*/
void signalOplogWaiters();
} // namespace repl
} // namespace mongo
|
