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/**
 * @file llmetrics.cpp
 * @author Kelly
 * @date 2007-05-25
 * @brief Metrics accumulation and associated functions
 *
 * $LicenseInfo:firstyear=2007&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "linden_common.h"
#include "llmetrics.h"

#include "llsd.h"
#include "llsdserialize.h"
#include "llframetimer.h"

class LLMetricsImpl
{
public:
    LLMetricsImpl() { }
    ~LLMetricsImpl();

    void recordEvent(const std::string& location, const std::string& mesg, bool success);
    void printTotals(LLSD metadata);
    void recordEventDetails(const std::string& location,
                                    const std::string& mesg,
                                    bool success,
                                    LLSD stats);
private:
    LLFrameTimer mLastPrintTimer;
    LLSD mMetricsMap;
};

LLMetricsImpl::~LLMetricsImpl()
{
}

void LLMetricsImpl::recordEventDetails(const std::string& location,
                                    const std::string& mesg,
                                    bool success,
                                    LLSD stats)
{
    recordEvent(location,mesg,success);

    LLSD metrics = LLSD::emptyMap();
    metrics["location"] = location;
    metrics["stats"]  = stats;

    LL_INFOS() << "LLMETRICS: " << (LLSDNotationStreamer(metrics)) << LL_ENDL;
}

// Store this:
// [ {'location_1':{'mesg_1':{'success':i10, 'fail':i0},
//                  'mesg_2':{'success':i10, 'fail':i0}},
//   {'location_2',{'mesg_3':{'success':i10, 'fail':i0}} ]
void LLMetricsImpl::recordEvent(const std::string& location, const std::string& mesg, bool success)
{
    LLSD& stats = mMetricsMap[location][mesg];
    if (success)
    {
        stats["success"] = stats["success"].asInteger() + 1;
    }
    else
    {
        stats["fail"] = stats["fail"].asInteger() + 1;
    }
}

// Print this:
// { 'meta':
//      { 'elapsed_time':r3600.000 }
//   'stats':
//      [ {'location':'location_1', 'mesg':'mesg_1', 'success':i10, 'fail':i0},
//        {'location':'location_1', 'mesg':'mesg_2', 'success':i10, 'fail':i0},
//        {'location':'location_2', 'mesg':'mesg_3', 'success':i10, 'fail':i0} ] }
void LLMetricsImpl::printTotals(LLSD metadata)
{
    F32 elapsed_time = mLastPrintTimer.getElapsedTimeAndResetF32();
    metadata["elapsed_time"] = elapsed_time;

    LLSD out_sd = LLSD::emptyMap();
    out_sd["meta"] = metadata;

    LLSD stats = LLSD::emptyArray();

    LLSD::map_const_iterator loc_it = mMetricsMap.beginMap();
    LLSD::map_const_iterator loc_end = mMetricsMap.endMap();
    for ( ; loc_it != loc_end; ++loc_it)
    {
        const std::string& location = (*loc_it).first;

        const LLSD& loc_map = (*loc_it).second;
        LLSD::map_const_iterator mesg_it = loc_map.beginMap();
        LLSD::map_const_iterator mesg_end = loc_map.endMap();
        for ( ; mesg_it != mesg_end; ++mesg_it)
        {
            const std::string& mesg = (*mesg_it).first;
            const LLSD& mesg_map = (*mesg_it).second;

            LLSD entry = LLSD::emptyMap();
            entry["location"] = location;
            entry["mesg"] = mesg;
            entry["success"] = mesg_map["success"];
            entry["fail"] = mesg_map["fail"];

            stats.append(entry);
        }
    }

    out_sd["stats"] = stats;

    LL_INFOS() << "LLMETRICS: AGGREGATE: " << LLSDOStreamer<LLSDNotationFormatter>(out_sd) << LL_ENDL;
}

LLMetrics::LLMetrics()
{
    mImpl = new LLMetricsImpl();
}

LLMetrics::~LLMetrics()
{
    delete mImpl;
    mImpl = NULL;
}

void LLMetrics::recordEvent(const std::string& location, const std::string& mesg, bool success)
{
    if (mImpl) mImpl->recordEvent(location,mesg,success);
}

void LLMetrics::printTotals(LLSD meta)
{
    if (mImpl) mImpl->printTotals(meta);
}


void LLMetrics::recordEventDetails(const std::string& location,
                                    const std::string& mesg,
                                    bool success,
                                    LLSD stats)
{
    if (mImpl) mImpl->recordEventDetails(location,mesg,success,stats);
}