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// counters.h
/*
 *    Copyright (C) 2010 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/db/jsobj.h"
#include "mongo/platform/atomic_word.h"
#include "mongo/platform/basic.h"
#include "mongo/util/concurrency/spin_lock.h"
#include "mongo/util/net/message.h"
#include "mongo/util/processinfo.h"

namespace mongo {

/**
 * for storing operation counters
 * note: not thread safe.  ok with that for speed
 */
class OpCounters {
public:
    OpCounters();
    void gotInserts(int n);
    void gotInsert();
    void gotQuery();
    void gotUpdate();
    void gotDelete();
    void gotGetMore();
    void gotCommand();

    void gotOp(int op, bool isCommand);

    BSONObj getObj() const;

    // thse are used by snmp, and other things, do not remove
    const AtomicUInt32* getInsert() const {
        return &_insert;
    }
    const AtomicUInt32* getQuery() const {
        return &_query;
    }
    const AtomicUInt32* getUpdate() const {
        return &_update;
    }
    const AtomicUInt32* getDelete() const {
        return &_delete;
    }
    const AtomicUInt32* getGetMore() const {
        return &_getmore;
    }
    const AtomicUInt32* getCommand() const {
        return &_command;
    }

private:
    void _checkWrap();

    // todo: there will be a lot of cache line contention on these.  need to do something
    //       else eventually.
    AtomicUInt32 _insert;
    AtomicUInt32 _query;
    AtomicUInt32 _update;
    AtomicUInt32 _delete;
    AtomicUInt32 _getmore;
    AtomicUInt32 _command;
};

extern OpCounters globalOpCounters;
extern OpCounters replOpCounters;

class NetworkCounter {
public:
    NetworkCounter() : _bytesIn(0), _bytesOut(0), _requests(0) {}
    void hit(long long bytesIn, long long bytesOut);
    void append(BSONObjBuilder& b);

private:
    AtomicInt64 _bytesIn;
    AtomicInt64 _bytesOut;
    AtomicInt64 _requests;
};

extern NetworkCounter networkCounter;
}