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// instance.h : Global state functions.
//
/**
* 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 "mongo/client/dbclientinterface.h"
#include "mongo/db/client.h"
#include "mongo/db/curop.h"
#include "mongo/db/dbmessage.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/storage_options.h"
namespace mongo {
extern std::string dbExecCommand;
/** a high level recording of operations to the database - sometimes used for diagnostics
and debugging.
*/
class DiagLog {
std::ofstream *f; // note this is never freed
/* 0 = off; 1 = writes, 2 = reads, 3 = both
7 = log a few reads, and all writes.
*/
int level;
mongo::mutex mutex;
void openFile();
public:
DiagLog();
int getLevel() const { return level; }
/**
* @return old
*/
int setLevel( int newLevel );
void flush();
void writeop(char *data,int len);
void readop(char *data, int len);
};
extern DiagLog _diaglog;
void assembleResponse( OperationContext* txn,
Message& m,
DbResponse& dbresponse,
const HostAndPort &client );
void getDatabaseNames(std::vector<std::string> &names,
const std::string& usePath = storageGlobalParams.dbpath);
/* returns true if there is no data on this server. useful when starting replication.
local database does NOT count.
*/
bool replHasDatabases();
/**
* Embedded calls to the local server using the DBClientBase API without going over the network.
*
* Caller does not need to lock, that is handled within.
*
* All operations are performed within the scope of a passed-in OperationContext (except when
* using the deprecated constructor). You must ensure that the OperationContext is valid when
* calling into any function. If you ever need to change the OperationContext, that can be done
* without the overhead of creating a new DBDirectClient by calling setOpCtx(), after which all
* operations will use the new OperationContext.
*/
class DBDirectClient : public DBClientBase {
public:
DBDirectClient(); // DEPRECATED
DBDirectClient(OperationContext* txn);
void setOpCtx(OperationContext* txn) { _txn = txn; };
using DBClientBase::query;
virtual std::auto_ptr<DBClientCursor> query(const std::string &ns, Query query, int nToReturn = 0, int nToSkip = 0,
const BSONObj *fieldsToReturn = 0, int queryOptions = 0, int batchSize = 0);
virtual bool isFailed() const {
return false;
}
virtual bool isStillConnected() {
return true;
}
virtual std::string toString() const {
return "DBDirectClient";
}
virtual std::string getServerAddress() const {
return "localhost"; // TODO: should this have the port?
}
virtual bool call( Message &toSend, Message &response, bool assertOk=true , std::string * actualServer = 0 );
virtual void say( Message &toSend, bool isRetry = false , std::string * actualServer = 0 );
virtual void sayPiggyBack( Message &toSend ) {
// don't need to piggy back when connected locally
return say( toSend );
}
virtual void killCursor( long long cursorID );
virtual bool callRead( Message& toSend , Message& response ) {
return call( toSend , response );
}
virtual unsigned long long count(const std::string &ns, const BSONObj& query = BSONObj(), int options=0, int limit=0, int skip=0 );
virtual ConnectionString::ConnectionType type() const { return ConnectionString::MASTER; }
double getSoTimeout() const { return 0; }
virtual bool lazySupported() const { return true; }
virtual QueryOptions _lookupAvailableOptions();
private:
static HostAndPort _clientHost;
boost::scoped_ptr<OperationContext> _txnOwned;
OperationContext* _txn; // Points either to _txnOwned or a passed-in transaction.
};
extern int lockFile;
#ifdef _WIN32
extern HANDLE lockFileHandle;
#endif
void acquirePathLock(bool doingRepair=false); // if doingRepair=true don't consider unclean shutdown an error
void maybeCreatePidFile();
void exitCleanly( ExitCode code );
} // namespace mongo
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