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/**
* 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 <cstddef>
#include <deque>
#include <string>
#include "mongo/base/status.h"
#include "mongo/base/disallow_copying.h"
#include "mongo/db/repl/optime.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/stdx/functional.h"
#include "mongo/util/concurrency/mutex.h"
#include "mongo/util/time_support.h"
namespace mongo {
class BSONObj;
class Collection;
struct CollectionOptions;
class Database;
class NamespaceString;
class OperationContext;
class Timestamp;
class RecordId;
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 using createOplog() if it doesn't yet exist.
* Collection name will be "_oplogCollectionName" initialized in setOplogCollectionName().
* This will be either local.oplog.rs (replica sets) or local.oplog.$main (master/slave)
*/
void createOplog(OperationContext* txn);
// This function writes ops into the replica-set oplog;
// used internally by replication secondaries after they have applied ops. Updates the global
// optime.
// Returns the optime for the last op inserted.
OpTime writeOpsToOplog(OperationContext* txn, const std::vector<BSONObj>& ops);
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 convertUpdateToUpsert 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 convertUpdateToUpsert = false,
IncrementOpsAppliedStatsFn incrementOpsAppliedStats = {});
/**
* Take a command op and apply it locally
* Used for applying from an oplog
* Returns failure status if the op that could not be applied.
*/
Status applyCommand_inlock(OperationContext* txn, const BSONObj& op);
/**
* 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(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();
/**
* Check that the oplog is capped, and abort the process if it is not.
*/
void checkForCappedOplog(OperationContext* txn);
} // namespace repl
} // namespace mongo
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