<%#
 Copyright 2013-2018 the original author or authors from the JHipster project.

 This file is part of the JHipster project, see http://www.jhipster.tech/
 for more information.

 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.
-%>
package <%=packageName%>.config;

import io.github.jhipster.config.JHipsterProperties;
<%_ if (applicationType === 'microservice' || applicationType === 'gateway') { _%>
import io.github.jhipster.config.metrics.SpectatorLogMetricWriter;

import com.netflix.spectator.api.Registry;
import org.springframework.boot.actuate.autoconfigure.ExportMetricReader;
import org.springframework.boot.actuate.autoconfigure.ExportMetricWriter;
import org.springframework.boot.actuate.metrics.writer.MetricWriter;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.cloud.netflix.metrics.spectator.SpectatorMetricReader;
<%_ } _%>

import com.codahale.metrics.JmxReporter;
import com.codahale.metrics.JvmAttributeGaugeSet;
import com.codahale.metrics.MetricRegistry;
import com.codahale.metrics.Slf4jReporter;
import com.codahale.metrics.health.HealthCheckRegistry;
<%_ if (['ehcache', 'infinispan'].includes(cacheProvider)) { _%>
import com.codahale.metrics.jcache.JCacheGaugeSet;
<%_ } _%>
import com.codahale.metrics.jvm.*;
import com.ryantenney.metrics.spring.config.annotation.EnableMetrics;
import com.ryantenney.metrics.spring.config.annotation.MetricsConfigurerAdapter;
<%_ if (databaseType === 'sql') { _%>
import com.zaxxer.hikari.HikariDataSource;
<%_ } _%>
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.Marker;
import org.slf4j.MarkerFactory;
<%_ if (databaseType === 'sql') { _%>
import org.springframework.beans.factory.annotation.Autowired;
<%_ } _%>
import org.springframework.context.annotation.*;

import javax.annotation.PostConstruct;
import java.lang.management.ManagementFactory;
import java.util.concurrent.TimeUnit;

@Configuration
@EnableMetrics(proxyTargetClass = true)
public class MetricsConfiguration extends MetricsConfigurerAdapter {

    private static final String PROP_METRIC_REG_JVM_MEMORY = "jvm.memory";
    private static final String PROP_METRIC_REG_JVM_GARBAGE = "jvm.garbage";
    private static final String PROP_METRIC_REG_JVM_THREADS = "jvm.threads";
    private static final String PROP_METRIC_REG_JVM_FILES = "jvm.files";
    private static final String PROP_METRIC_REG_JVM_BUFFERS = "jvm.buffers";
    private static final String PROP_METRIC_REG_JVM_ATTRIBUTE_SET = "jvm.attributes";
<% if (['ehcache', 'infinispan'].includes(cacheProvider)) { %>
    private static final String PROP_METRIC_REG_JCACHE_STATISTICS = "jcache.statistics";
<%_ } _%>

    private final Logger log = LoggerFactory.getLogger(MetricsConfiguration.class);

    private MetricRegistry metricRegistry = new MetricRegistry();

    private HealthCheckRegistry healthCheckRegistry = new HealthCheckRegistry();

    private final JHipsterProperties jHipsterProperties;
<%_ if (databaseType === 'sql') { _%>

    private HikariDataSource hikariDataSource;
<%_ } _%>

    public MetricsConfiguration(JHipsterProperties jHipsterProperties) {
        this.jHipsterProperties = jHipsterProperties;
    }
<%_ if (databaseType === 'sql') { _%>

    @Autowired(required = false)
    public void setHikariDataSource(HikariDataSource hikariDataSource) {
        this.hikariDataSource = hikariDataSource;
    }
<%_ } _%>

    @Override
    @Bean
    public MetricRegistry getMetricRegistry() {
        return metricRegistry;
    }

    @Override
    @Bean
    public HealthCheckRegistry getHealthCheckRegistry() {
        return healthCheckRegistry;
    }

    @PostConstruct
    public void init() {
        log.debug("Registering JVM gauges");
        metricRegistry.register(PROP_METRIC_REG_JVM_MEMORY, new MemoryUsageGaugeSet());
        metricRegistry.register(PROP_METRIC_REG_JVM_GARBAGE, new GarbageCollectorMetricSet());
        metricRegistry.register(PROP_METRIC_REG_JVM_THREADS, new ThreadStatesGaugeSet());
        metricRegistry.register(PROP_METRIC_REG_JVM_FILES, new FileDescriptorRatioGauge());
        metricRegistry.register(PROP_METRIC_REG_JVM_BUFFERS, new BufferPoolMetricSet(ManagementFactory.getPlatformMBeanServer()));
        metricRegistry.register(PROP_METRIC_REG_JVM_ATTRIBUTE_SET, new JvmAttributeGaugeSet());
        <%_ if (['ehcache', 'infinispan'].includes(cacheProvider)) { _%>
        metricRegistry.register(PROP_METRIC_REG_JCACHE_STATISTICS, new JCacheGaugeSet());
        <%_ } _%>
        <%_ if (databaseType === 'sql') { _%>
        if (hikariDataSource != null) {
            log.debug("Monitoring the datasource");
            hikariDataSource.setMetricRegistry(metricRegistry);
        }
        <%_ } _%>
        if (jHipsterProperties.getMetrics().getJmx().isEnabled()) {
            log.debug("Initializing Metrics JMX reporting");
            JmxReporter jmxReporter = JmxReporter.forRegistry(metricRegistry).build();
            jmxReporter.start();
        }
        if (jHipsterProperties.getMetrics().getLogs().isEnabled()) {
            log.info("Initializing Metrics Log reporting");
            Marker metricsMarker = MarkerFactory.getMarker("metrics");
            final Slf4jReporter reporter = Slf4jReporter.forRegistry(metricRegistry)
                .outputTo(LoggerFactory.getLogger("metrics"))
                .markWith(metricsMarker)
                .convertRatesTo(TimeUnit.SECONDS)
                .convertDurationsTo(TimeUnit.MILLISECONDS)
                .build();
            reporter.start(jHipsterProperties.getMetrics().getLogs().getReportFrequency(), TimeUnit.SECONDS);
        }
    }
    <%_ if (applicationType === 'microservice' || applicationType === 'gateway') { _%>

    /* Spectator metrics log reporting */
    @Bean
    @ConditionalOnProperty("jhipster.logging.spectator-metrics.enabled")
    @ExportMetricReader
    public SpectatorMetricReader spectatorMetricReader(Registry registry) {
        log.info("Initializing Spectator Metrics Log reporting");
        return new SpectatorMetricReader(registry);
    }

    @Bean
    @ConditionalOnProperty("jhipster.logging.spectator-metrics.enabled")
    @ExportMetricWriter
    MetricWriter metricWriter() {
        return new SpectatorLogMetricWriter();
    }
    <%_ } _%>
}