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// SPDX-License-Identifier: GPL-3.0-or-later
#include <snappy.h>
#include "exporting/prometheus/remote_write/remote_write.pb.h"
#include "remote_write.h"
using namespace prometheus;
static google::protobuf::Arena arena;
static WriteRequest *write_request;
void backends_init_write_request() {
GOOGLE_PROTOBUF_VERIFY_VERSION;
write_request = google::protobuf::Arena::CreateMessage<WriteRequest>(&arena);
}
void backends_clear_write_request() {
write_request->clear_timeseries();
}
void backends_add_host_info(const char *name, const char *instance, const char *application, const char *version, const int64_t timestamp) {
TimeSeries *timeseries;
Sample *sample;
Label *label;
timeseries = write_request->add_timeseries();
label = timeseries->add_labels();
label->set_name("__name__");
label->set_value(name);
label = timeseries->add_labels();
label->set_name("instance");
label->set_value(instance);
if(application) {
label = timeseries->add_labels();
label->set_name("application");
label->set_value(application);
}
if(version) {
label = timeseries->add_labels();
label->set_name("version");
label->set_value(version);
}
sample = timeseries->add_samples();
sample->set_value(1);
sample->set_timestamp(timestamp);
}
// adds tag to the last created timeseries
void backends_add_tag(char *tag, char *value) {
TimeSeries *timeseries;
Label *label;
timeseries = write_request->mutable_timeseries(write_request->timeseries_size() - 1);
label = timeseries->add_labels();
label->set_name(tag);
label->set_value(value);
}
void backends_add_metric(const char *name, const char *chart, const char *family, const char *dimension, const char *instance, const double value, const int64_t timestamp) {
TimeSeries *timeseries;
Sample *sample;
Label *label;
timeseries = write_request->add_timeseries();
label = timeseries->add_labels();
label->set_name("__name__");
label->set_value(name);
label = timeseries->add_labels();
label->set_name("chart");
label->set_value(chart);
label = timeseries->add_labels();
label->set_name("family");
label->set_value(family);
if(dimension) {
label = timeseries->add_labels();
label->set_name("dimension");
label->set_value(dimension);
}
label = timeseries->add_labels();
label->set_name("instance");
label->set_value(instance);
sample = timeseries->add_samples();
sample->set_value(value);
sample->set_timestamp(timestamp);
}
size_t backends_get_write_request_size(){
#if GOOGLE_PROTOBUF_VERSION < 3001000
size_t size = (size_t)snappy::MaxCompressedLength(write_request->ByteSize());
#else
size_t size = (size_t)snappy::MaxCompressedLength(write_request->ByteSizeLong());
#endif
return (size < INT_MAX)?size:0;
}
int backends_pack_write_request(char *buffer, size_t *size) {
std::string uncompressed_write_request;
if(write_request->SerializeToString(&uncompressed_write_request) == false) return 1;
snappy::RawCompress(uncompressed_write_request.data(), uncompressed_write_request.size(), buffer, size);
return 0;
}
void backends_protocol_buffers_shutdown() {
google::protobuf::ShutdownProtobufLibrary();
}
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