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/*
 * Copyright 2012-2020 the original author or authors.
 *
 * 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
 *
 *      https://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 org.springframework.boot.actuate.autoconfigure.metrics.export.elastic;

import io.micrometer.core.instrument.Clock;
import io.micrometer.core.ipc.http.HttpUrlConnectionSender;
import io.micrometer.elastic.ElasticConfig;
import io.micrometer.elastic.ElasticMeterRegistry;

import org.springframework.boot.actuate.autoconfigure.metrics.CompositeMeterRegistryAutoConfiguration;
import org.springframework.boot.actuate.autoconfigure.metrics.MetricsAutoConfiguration;
import org.springframework.boot.actuate.autoconfigure.metrics.export.ConditionalOnEnabledMetricsExport;
import org.springframework.boot.actuate.autoconfigure.metrics.export.simple.SimpleMetricsExportAutoConfiguration;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * {@link EnableAutoConfiguration Auto-configuration} for exporting metrics to Elastic.
 *
 * @author Andy Wilkinson
 * @author Artsiom Yudovin
 * @since 2.1.0
 */
@Configuration(proxyBeanMethods = false)
@AutoConfigureBefore({ CompositeMeterRegistryAutoConfiguration.class, SimpleMetricsExportAutoConfiguration.class })
@AutoConfigureAfter(MetricsAutoConfiguration.class)
@ConditionalOnBean(Clock.class)
@ConditionalOnClass(ElasticMeterRegistry.class)
@ConditionalOnEnabledMetricsExport("elastic")
@EnableConfigurationProperties(ElasticProperties.class)
public class ElasticMetricsExportAutoConfiguration {

	private final ElasticProperties properties;

	public ElasticMetricsExportAutoConfiguration(ElasticProperties properties) {
		this.properties = properties;
	}

	@Bean
	@ConditionalOnMissingBean
	public ElasticConfig elasticConfig() {
		return new ElasticPropertiesConfigAdapter(this.properties);
	}

	@Bean
	@ConditionalOnMissingBean
	public ElasticMeterRegistry elasticMeterRegistry(ElasticConfig elasticConfig, Clock clock) {
		return ElasticMeterRegistry.builder(elasticConfig).clock(clock).httpClient(
				new HttpUrlConnectionSender(this.properties.getConnectTimeout(), this.properties.getReadTimeout()))
				.build();
	}

}