D-Net

package eu.dnetlib.repo.manager.controllers;

import eu.dnetlib.repo.manager.service.PiWikService;

import io.micrometer.core.instrument.binder.jvm.DiskSpaceMetrics;

import io.micrometer.core.instrument.binder.jvm.JvmGcMetrics;

import io.micrometer.core.instrument.binder.jvm.JvmMemoryMetrics;

import io.micrometer.core.instrument.binder.jvm.JvmThreadMetrics;

import io.micrometer.core.instrument.binder.system.ProcessorMetrics;

import io.micrometer.core.instrument.binder.system.UptimeMetrics;

import io.micrometer.prometheus.PrometheusConfig;

import io.micrometer.prometheus.PrometheusMeterRegistry;

import io.prometheus.client.exporter.common.TextFormat;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.http.MediaType;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RestController;

import java.io.File;

@RestController

@RequestMapping("/actuator/prometheus")

public class PrometheusController { // TODO: remove this with migration to Spring Boot 2

    private final PiWikService piWikService;

    @Autowired

    public PrometheusController(PiWikService piWikService) {

        this.piWikService = piWikService;

    }

    @RequestMapping(method = RequestMethod.GET, path = "", produces = MediaType.TEXT_PLAIN_VALUE)

    public String getPiwikMetrics() {

        PrometheusMeterRegistry registry = new PrometheusMeterRegistry(PrometheusConfig.DEFAULT);

        registry.counter("total").increment(piWikService.getTotal());

        registry.counter("validated").increment(piWikService.getValidated(true));

        return registry.scrape(TextFormat.CONTENT_TYPE_004);

    }

    @RequestMapping(method = RequestMethod.GET, path = "metrics", produces = MediaType.TEXT_PLAIN_VALUE)

    public String getMetrics() {

        PrometheusMeterRegistry registry = new PrometheusMeterRegistry(PrometheusConfig.DEFAULT);

        new JvmThreadMetrics().bindTo(registry);

        new JvmGcMetrics().bindTo(registry);

        new JvmMemoryMetrics().bindTo(registry);

        new DiskSpaceMetrics(new File("/")).bindTo(registry);

        new ProcessorMetrics().bindTo(registry); // metrics related to the CPU stats

        new UptimeMetrics().bindTo(registry);

        return registry.scrape(TextFormat.CONTENT_TYPE_004);

    }

}