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/*
* Copyright (c) 2024 Attila Szakacs
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, or (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "grpc-metrics.hpp"
#include "compat/cpp-start.h"
#include "messages.h"
#include "compat/cpp-end.h"
using namespace syslogng::grpc;
/*
* Initializes the DestDriverMetrics instance.
* Takes the ownership of kb.
*/
void
DestDriverMetrics::init(StatsClusterKeyBuilder *kb_, int stats_level_)
{
kb = kb_;
stats_level = stats_level_;
}
void
DestDriverMetrics::deinit()
{
stats_lock();
{
for (const auto &clusters : grpc_request_clusters)
{
StatsCounterItem *counter = stats_cluster_single_get_counter(clusters.second);
stats_unregister_counter(&clusters.second->key, SC_TYPE_SINGLE_VALUE, &counter);
}
}
stats_unlock();
stats_cluster_key_builder_free(kb);
}
StatsCluster *
DestDriverMetrics::create_grpc_request_cluster(::grpc::StatusCode response_code)
{
static const std::map<::grpc::StatusCode, std::string> status_code_name_mappings =
{
{::grpc::StatusCode::OK, "ok"},
{::grpc::StatusCode::CANCELLED, "cancelled"},
{::grpc::StatusCode::UNKNOWN, "unknown"},
{::grpc::StatusCode::INVALID_ARGUMENT, "invalid_argument"},
{::grpc::StatusCode::DEADLINE_EXCEEDED, "deadline_exceeded"},
{::grpc::StatusCode::NOT_FOUND, "not_found"},
{::grpc::StatusCode::ALREADY_EXISTS, "already_exists"},
{::grpc::StatusCode::PERMISSION_DENIED, "permission_denied"},
{::grpc::StatusCode::UNAUTHENTICATED, "unauthenticated"},
{::grpc::StatusCode::RESOURCE_EXHAUSTED, "resource_exhausted"},
{::grpc::StatusCode::FAILED_PRECONDITION, "failed_precondition"},
{::grpc::StatusCode::ABORTED, "aborted"},
{::grpc::StatusCode::OUT_OF_RANGE, "out_of_range"},
{::grpc::StatusCode::UNIMPLEMENTED, "unimplemented"},
{::grpc::StatusCode::INTERNAL, "internal"},
{::grpc::StatusCode::UNAVAILABLE, "unavailable"},
{::grpc::StatusCode::DATA_LOSS, "data_loss"},
};
std::string response_code_label;
try
{
response_code_label = status_code_name_mappings.at(response_code);
}
catch (const std::out_of_range &)
{
msg_error("Failed to find metric label for gRPC response code", evt_tag_int("response_code", response_code));
return nullptr;
}
StatsCluster *cluster;
stats_cluster_key_builder_push(kb);
{
stats_cluster_key_builder_set_name(kb, "output_grpc_requests_total");
stats_cluster_key_builder_add_label(kb, stats_cluster_label("response_code", response_code_label.c_str()));
StatsClusterKey *sc_key = stats_cluster_key_builder_build_single(kb);
StatsCounterItem *counter;
cluster = stats_register_counter(stats_level, sc_key, SC_TYPE_SINGLE_VALUE, &counter);
}
stats_cluster_key_builder_pop(kb);
return cluster;
}
StatsCounterItem *
DestDriverMetrics::lookup_grpc_request_counter(::grpc::StatusCode response_code)
{
StatsCluster *cluster;
try
{
cluster = grpc_request_clusters.at(response_code);
}
catch (const std::out_of_range &)
{
stats_lock();
{
try
{
cluster = grpc_request_clusters.at(response_code);
}
catch (const std::out_of_range &)
{
grpc_request_clusters[response_code] = cluster = create_grpc_request_cluster(response_code);
}
}
stats_unlock();
}
return stats_cluster_single_get_counter(cluster);
}
void
DestDriverMetrics::insert_grpc_request_stats(const ::grpc::Status &response_status)
{
StatsCounterItem *counter = lookup_grpc_request_counter(response_status.error_code());
stats_counter_inc(counter);
}
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