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/**
* Copyright 2019 DigitalOcean Inc.
*
* 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 <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "microhttpd.h"
#include "prom.h"
#include "promhttp.h"
#include "foo.h"
#include "bar.h"
prom_histogram_t *test_histogram;
static void init(void) {
// Initialize the Default registry
prom_collector_registry_default_init();
// Register file-based metrics for each file
foo_init();
bar_init();
test_histogram = prom_collector_registry_must_register_metric(
prom_histogram_new(
"test_histogram",
"histogram under test",
prom_histogram_buckets_linear(5.0, 5.0, 2),
0,
NULL
)
);
// Set the active registry for the HTTP handler
promhttp_set_active_collector_registry(NULL);
}
int main(int argc, const char **argv) {
init();
int r = 0;
const char *labels[] = { "one", "two", "three", "four", "five" };
for (int i = 1; i <= 100; i++) {
double hist_value;
if (i % 2 == 0) {
hist_value = 3.0;
} else {
hist_value = 7.0;
}
r = prom_histogram_observe(test_histogram, hist_value, NULL);
if (r) exit(1);
for (int x = 0; x < 5; x++) {
r = foo(i, labels[x]);
if (r) exit(r);
r = bar(i+x, labels[x]);
if (r) exit(r);
}
}
struct MHD_Daemon *daemon = promhttp_start_daemon(MHD_USE_SELECT_INTERNALLY, 8000, NULL, NULL);
if (daemon == NULL) {
return 1;
}
int done = 0;
auto void intHandler(int signal);
void intHandler(int signal) {
printf("\nshutting down...\n");
fflush(stdout);
prom_collector_registry_destroy(PROM_COLLECTOR_REGISTRY_DEFAULT);
MHD_stop_daemon(daemon);
done = 1;
}
if (argc == 2) {
unsigned int timeout = atoi(argv[1]);
sleep(timeout);
intHandler(0);
return 0;
}
signal(SIGINT, intHandler);
while(done == 0) {}
return 0;
}
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