stats.cpp

/*
 * Copyright (c) 2008-2025, Hazelcast, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#include <boost/utility/string_view_fwd.hpp>
#include <iomanip>
 
#include <boost/algorithm/string/replace.hpp>
#include <boost/utility/string_view.hpp>
#include <sstream>
 
#include "hazelcast/client/client_config.h"
#include "hazelcast/client/client_properties.h"
#include "hazelcast/client/connection/ClientConnectionManagerImpl.h"
#include "hazelcast/client/connection/Connection.h"
#include "hazelcast/client/impl/metrics/metrics_compressor.h"
#include "hazelcast/client/impl/metrics/metric_descriptor.h"
#include "hazelcast/client/impl/statistics/Statistics.h"
#include "hazelcast/client/internal/nearcache/NearCache.h"
#include "hazelcast/client/internal/nearcache/NearCacheManager.h"
#include "hazelcast/client/monitor/impl/LocalMapStatsImpl.h"
#include "hazelcast/client/monitor/impl/NearCacheStatsImpl.h"
#include "hazelcast/client/protocol/codec/codecs.h"
#include "hazelcast/client/protocol/codec/codecs.h"
#include "hazelcast/client/spi/ClientContext.h"
#include "hazelcast/client/spi/impl/ClientExecutionServiceImpl.h"
#include "hazelcast/client/spi/impl/ClientInvocation.h"
#include "hazelcast/client/spi/lifecycle_service.h"
 
namespace hazelcast {
namespace client {
namespace impl {
namespace statistics {
const std::string Statistics::NEAR_CACHE_CATEGORY_PREFIX("nc.");
 
Statistics::Statistics(spi::ClientContext& client_context)
  : client_context_(client_context)
  , client_properties_(client_context.get_client_properties())
  , logger_(client_context.get_logger())
  , periodic_stats_(*this)
{
    this->enabled_ = client_properties_.get_boolean(
      client_properties_.get_statistics_enabled());
}
 
void
Statistics::start()
{
    if (!enabled_) {
        return;
    }
 
    int64_t periodSeconds = client_properties_.get_long(
      client_properties_.get_statistics_period_seconds());
    if (periodSeconds <= 0) {
 
        int64_t defaultValue = util::IOUtil::to_value<int64_t>(
          client_properties_.get_statistics_period_seconds()
            .get_default_value());
        HZ_LOG(
          logger_,
          warning,
          boost::str(
            boost::format("Provided client statistics %1% cannot be less than "
                          "or equal to 0. "
                          "You provided %2% seconds as the configuration. "
                          "Client will use the default value of %3% instead.") %
            client_properties_.get_statistics_period_seconds().get_name() %
            periodSeconds % defaultValue));
        periodSeconds = defaultValue;
    }
 
    schedule_periodic_statistics_send_task(periodSeconds);
 
    HZ_LOG(
      logger_,
      info,
      boost::str(
        boost::format("Client statistics is enabled with period %1% seconds.") %
        periodSeconds));
}
 
void
Statistics::shutdown()
{
    if (send_task_timer_) {
        send_task_timer_->cancel();
    }
}
 
void
Statistics::schedule_periodic_statistics_send_task(int64_t period_seconds)
{
    send_task_timer_ =
      client_context_.get_client_execution_service().schedule_with_repetition(
        [=]() {
            if (!client_context_.get_lifecycle_service().is_running()) {
                return;
            }
 
            auto collection_timestamp =
              std::chrono::duration_cast<std::chrono::milliseconds>(
                std::chrono::system_clock::now().time_since_epoch())
                .count();
            std::shared_ptr<connection::Connection> connection =
              get_connection();
            if (!connection) {
                HZ_LOG(logger_,
                       finest,
                       "Cannot send client statistics to the server. No "
                       "connection found.");
                return;
            }
 
            std::ostringstream stats;
            metrics::metrics_compressor metrics_comp;
 
            periodic_stats_.fill_metrics(stats, metrics_comp, connection);
 
            periodic_stats_.add_near_cache_stats(stats, metrics_comp);
 
            send_stats(collection_timestamp,
                       stats.str(),
                       metrics_comp.get_blob(),
                       connection);
        },
        std::chrono::seconds(0),
        std::chrono::seconds(period_seconds));
}
 
std::shared_ptr<connection::Connection>
Statistics::get_connection()
{
    return client_context_.get_connection_manager().get_random_connection();
}
 
void
Statistics::send_stats(
  int64_t timestamp,
  const std::string& new_stats,
  const std::vector<byte> metrics_blob,
  const std::shared_ptr<connection::Connection>& connection)
{
    auto request = protocol::codec::client_statistics_encode(
      timestamp, new_stats, metrics_blob);
    try {
        spi::impl::ClientInvocation::create(
          client_context_, request, "", connection)
          ->invoke()
          .get();
    } catch (exception::iexception& e) {
        // suppress exception, do not print too many messages
        HZ_LOG(logger_,
               finest,
               boost::str(boost::format("Could not send stats %1%") % e));
    }
}
 
void
Statistics::PeriodicStatistics::fill_metrics(
  std::ostringstream& stats,
  metrics::metrics_compressor& compressor,
  const std::shared_ptr<connection::Connection>& connection)
{
    stats << "lastStatisticsCollectionTime" << KEY_VALUE_SEPARATOR
          << util::current_time_millis();
    add_stat(stats, "enterprise", false);
    add_stat(stats, "clientType", protocol::ClientTypes::CPP);
    add_stat(stats, "clientVersion", HAZELCAST_VERSION);
    add_stat(stats,
             "clusterConnectionTimestamp",
             std::chrono::duration_cast<std::chrono::milliseconds>(
               connection->get_start_time().time_since_epoch())
               .count());
 
    auto localSocketAddress = connection->get_local_socket_address();
    stats << STAT_SEPARATOR << "clientAddress" << KEY_VALUE_SEPARATOR;
    if (localSocketAddress) {
        stats << localSocketAddress->get_host() << ":"
              << localSocketAddress->get_port();
    }
 
    add_stat(stats, "clientName", statistics_.client_context_.get_name());
 
    auto credential =
      statistics_.client_context_.get_client_config().get_credentials();
    if (credential) {
        add_stat(stats, "credentials.principal", credential->name());
    }
 
    auto hw_concurrency = std::thread::hardware_concurrency();
    // necessary for compatibility with Management Center 4.0
    add_stat(stats, "runtime.availableProcessors", hw_concurrency);
    compressor.add_long(
      { "runtime", "availableProcessors", metrics::probe_unit::COUNT },
      hw_concurrency);
 
    // more gauges can be added here
}
 
void
Statistics::PeriodicStatistics::add_near_cache_stats(
  std::ostringstream& stats,
  metrics::metrics_compressor& compressor)
{
    for (auto near_cache : statistics_.client_context_.get_near_cache_manager()
                             .list_all_near_caches()) {
        std::string nc_name = near_cache->get_name();
 
        std::ostringstream nc_name_with_prefix_strm;
        get_name_with_prefix(nc_name, nc_name_with_prefix_strm);
        nc_name_with_prefix_strm << '.';
        std::string nc_name_with_prefix = nc_name_with_prefix_strm.str();
 
        auto nc_stats =
          std::static_pointer_cast<monitor::impl::NearCacheStatsImpl>(
            near_cache->get_near_cache_stats());
 
        add_near_cache_metric(stats,
                              compressor,
                              "creationTime",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_creation_time(),
                              metrics::probe_unit::MS);
 
        add_near_cache_metric(stats,
                              compressor,
                              "evictions",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_evictions(),
                              metrics::probe_unit::COUNT);
 
        add_near_cache_metric(stats,
                              compressor,
                              "hits",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_hits(),
                              metrics::probe_unit::COUNT);
 
        add_near_cache_metric(stats,
                              compressor,
                              "lastPersistenceDuration",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_last_persistence_duration(),
                              metrics::probe_unit::MS);
 
        add_near_cache_metric(stats,
                              compressor,
                              "lastPersistenceKeyCount",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_last_persistence_key_count(),
                              metrics::probe_unit::COUNT);
 
        add_near_cache_metric(stats,
                              compressor,
                              "lastPersistenceTime",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_last_persistence_time(),
                              metrics::probe_unit::MS);
 
        add_near_cache_metric(stats,
                              compressor,
                              "lastPersistenceWrittenBytes",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_last_persistence_written_bytes(),
                              metrics::probe_unit::BYTES);
 
        add_near_cache_metric(stats,
                              compressor,
                              "misses",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_misses(),
                              metrics::probe_unit::COUNT);
 
        add_near_cache_metric(stats,
                              compressor,
                              "ownedEntryCount",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_owned_entry_count(),
                              metrics::probe_unit::COUNT);
 
        add_near_cache_metric(stats,
                              compressor,
                              "expirations",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_expirations(),
                              metrics::probe_unit::COUNT);
 
        add_near_cache_metric(stats,
                              compressor,
                              "invalidations",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_invalidations(),
                              metrics::probe_unit::COUNT);
 
        add_near_cache_metric(stats,
                              compressor,
                              "invalidationRequests",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_invalidation_requests(),
                              metrics::probe_unit::COUNT);
 
        add_near_cache_metric(stats,
                              compressor,
                              "ownedEntryMemoryCost",
                              nc_name,
                              nc_name_with_prefix,
                              nc_stats->get_owned_entry_memory_cost(),
                              metrics::probe_unit::BYTES);
    }
}
 
void
Statistics::PeriodicStatistics::add_near_cache_metric(
  std::ostringstream& stats,
  metrics::metrics_compressor& compressor,
  const std::string& metric,
  const std::string& near_cache_name,
  const std::string& near_cache_name_with_prefix,
  int64_t value,
  metrics::probe_unit unit)
{
 
    metrics::metric_descriptor desc{
        "nearcache", metric, "name", near_cache_name, unit
    };
    compressor.add_long(desc, value);
 
    // necessary for compatibility with Management Center 4.0
    add_stat(stats, near_cache_name_with_prefix, metric, value);
}
 
Statistics::PeriodicStatistics::PeriodicStatistics(Statistics& statistics)
  : statistics_(statistics)
{}
 
std::string
Statistics::escape_special_characters(std::string& name)
{
    boost::replace_all(name, ",", "\\,");
    boost::replace_all(name, "=", "\\=");
    boost::replace_all(name, "\\", "\\\\");
 
    return name[0] == '/' ? name.substr(1) : name;
}
 
void
Statistics::PeriodicStatistics::get_name_with_prefix(std::string& name,
                                                     std::ostringstream& out)
{
    out << NEAR_CACHE_CATEGORY_PREFIX
        << Statistics::escape_special_characters(name);
}
 
template<>
void
Statistics::PeriodicStatistics::add_stat(std::ostringstream& stats,
                                         const std::string& name,
                                         const bool& value)
{
    stats << STAT_SEPARATOR << name << KEY_VALUE_SEPARATOR
          << (value ? "true" : "false");
}
 
} // namespace statistics
} // namespace impl
 
namespace monitor {
const int64_t local_instance_stats::STAT_NOT_AVAILABLE = -99L;
 
namespace impl {
LocalMapStatsImpl::LocalMapStatsImpl() = default;
 
LocalMapStatsImpl::LocalMapStatsImpl(
  const std::shared_ptr<monitor::near_cache_stats>& s)
  : near_cache_stats_(s)
{}
 
std::shared_ptr<monitor::near_cache_stats>
LocalMapStatsImpl::get_near_cache_stats() const
{
    return near_cache_stats_;
}
 
NearCacheStatsImpl::NearCacheStatsImpl()
  : creation_time_(util::current_time_millis())
  , owned_entry_count_(0)
  , owned_entry_memory_cost_(0)
  , hits_(0)
  , misses_(0)
  , evictions_(0)
  , expirations_(0)
  , invalidations_(0)
  , invalidation_requests_(0)
  , persistence_count_(0)
  , last_persistence_time_(0)
  , last_persistence_duration_(0)
  , last_persistence_written_bytes_(0)
  , last_persistence_key_count_(0)
  , last_persistence_failure_("")
{}
 
int64_t
NearCacheStatsImpl::get_creation_time()
{
    return creation_time_;
}
 
int64_t
NearCacheStatsImpl::get_owned_entry_count()
{
    return owned_entry_count_;
}
 
void
NearCacheStatsImpl::set_owned_entry_count(int64_t owned_entry_count)
{
    this->owned_entry_count_ = owned_entry_count;
}
 
void
NearCacheStatsImpl::increment_owned_entry_count()
{
    ++owned_entry_count_;
}
 
void
NearCacheStatsImpl::decrement_owned_entry_count()
{
    --owned_entry_count_;
}
 
int64_t
NearCacheStatsImpl::get_owned_entry_memory_cost()
{
    return owned_entry_memory_cost_;
}
 
void
NearCacheStatsImpl::set_owned_entry_memory_cost(int64_t owned_entry_memory_cost)
{
    this->owned_entry_memory_cost_ = owned_entry_memory_cost;
}
 
void
NearCacheStatsImpl::increment_owned_entry_memory_cost(
  int64_t owned_entry_memory_cost)
{
    this->owned_entry_memory_cost_ += owned_entry_memory_cost;
}
 
void
NearCacheStatsImpl::decrement_owned_entry_memory_cost(
  int64_t owned_entry_memory_cost)
{
    this->owned_entry_memory_cost_ -= owned_entry_memory_cost;
}
 
int64_t
NearCacheStatsImpl::get_hits()
{
    return hits_;
}
 
// just for testing
void
NearCacheStatsImpl::set_hits(int64_t hits)
{
    this->hits_ = hits;
}
 
void
NearCacheStatsImpl::increment_hits()
{
    ++hits_;
}
 
int64_t
NearCacheStatsImpl::get_misses()
{
    return misses_;
}
 
// just for testing
void
NearCacheStatsImpl::set_misses(int64_t misses)
{
    this->misses_ = misses;
}
 
void
NearCacheStatsImpl::increment_misses()
{
    ++misses_;
}
 
double
NearCacheStatsImpl::get_ratio()
{
    if (misses_ == (int64_t)0) {
        if (hits_ == (int64_t)0) {
            return std::numeric_limits<double>::signaling_NaN();
        } else {
            return std::numeric_limits<double>::infinity();
        }
    } else {
        return ((double)hits_ / misses_) * PERCENTAGE;
    }
}
 
int64_t
NearCacheStatsImpl::get_evictions()
{
    return evictions_;
}
 
void
NearCacheStatsImpl::increment_evictions()
{
    ++evictions_;
}
 
int64_t
NearCacheStatsImpl::get_expirations()
{
    return expirations_;
}
 
void
NearCacheStatsImpl::increment_expirations()
{
    ++expirations_;
}
 
int64_t
NearCacheStatsImpl::get_invalidations()
{
    return invalidations_.load();
}
 
void
NearCacheStatsImpl::increment_invalidations()
{
    ++invalidations_;
}
 
int64_t
NearCacheStatsImpl::get_invalidation_requests()
{
    return invalidation_requests_.load();
}
 
void
NearCacheStatsImpl::increment_invalidation_requests()
{
    ++invalidation_requests_;
}
 
void
NearCacheStatsImpl::reset_invalidation_events()
{
    invalidation_requests_ = 0;
}
 
int64_t
NearCacheStatsImpl::get_persistence_count()
{
    return persistence_count_;
}
 
void
NearCacheStatsImpl::add_persistence(int64_t duration,
                                    int32_t written_bytes,
                                    int32_t key_count)
{
    ++persistence_count_;
    last_persistence_time_ = util::current_time_millis();
    last_persistence_duration_ = duration;
    last_persistence_written_bytes_ = written_bytes;
    last_persistence_key_count_ = key_count;
    last_persistence_failure_ = "";
}
 
int64_t
NearCacheStatsImpl::get_last_persistence_time()
{
    return last_persistence_time_;
}
 
int64_t
NearCacheStatsImpl::get_last_persistence_duration()
{
    return last_persistence_duration_;
}
 
int64_t
NearCacheStatsImpl::get_last_persistence_written_bytes()
{
    return last_persistence_written_bytes_;
}
 
int64_t
NearCacheStatsImpl::get_last_persistence_key_count()
{
    return last_persistence_key_count_;
}
 
std::string
NearCacheStatsImpl::get_last_persistence_failure()
{
    return last_persistence_failure_;
}
 
std::string
NearCacheStatsImpl::to_string()
{
    std::ostringstream out;
    std::string failureString = last_persistence_failure_;
    out << "NearCacheStatsImpl{"
        << "ownedEntryCount=" << owned_entry_count_
        << ", ownedEntryMemoryCost=" << owned_entry_memory_cost_
        << ", creationTime=" << creation_time_ << ", hits=" << hits_
        << ", misses=" << misses_ << ", ratio=" << std::setprecision(1)
        << get_ratio() << ", evictions=" << evictions_
        << ", expirations=" << expirations_
        << ", invalidations=" << invalidations_.load()
        << ", invalidationRequests=" << invalidation_requests_.load()
        << ", lastPersistenceTime=" << last_persistence_time_
        << ", persistenceCount=" << persistence_count_
        << ", lastPersistenceDuration=" << last_persistence_duration_
        << ", lastPersistenceWrittenBytes=" << last_persistence_written_bytes_
        << ", lastPersistenceKeyCount=" << last_persistence_key_count_
        << ", lastPersistenceFailure='" << failureString << "'" << '}';
 
    return out.str();
}
 
const double NearCacheStatsImpl::PERCENTAGE = 100.0;
 
} // namespace impl
} // namespace monitor
} // namespace client
} // namespace hazelcast