/*
 * Copyright 2012-2015 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
 *
 *      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 org.springframework.boot.actuate.autoconfigure;

import org.springframework.boot.actuate.endpoint.MetricReaderPublicMetrics;
import org.springframework.boot.actuate.endpoint.PublicMetrics;
import org.springframework.boot.actuate.metrics.CounterService;
import org.springframework.boot.actuate.metrics.GaugeService;
import org.springframework.boot.actuate.metrics.dropwizard.DropwizardMetricServices;
import org.springframework.boot.actuate.metrics.reader.MetricRegistryMetricReader;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.codahale.metrics.MetricRegistry;

/**
 * {@link EnableAutoConfiguration Auto-configuration} for Dropwizard-based metrics.
 *
 * @author Dave Syer
 */
@Configuration
@ConditionalOnClass(MetricRegistry.class)
@AutoConfigureBefore(MetricRepositoryAutoConfiguration.class)
public class MetricsDropwizardAutoConfiguration {

	@Bean
	@ConditionalOnMissingBean
	public MetricRegistry metricRegistry() {
		return new MetricRegistry();
	}

	@Bean
	@ConditionalOnMissingBean({ DropwizardMetricServices.class, CounterService.class,
			GaugeService.class })
	public DropwizardMetricServices dropwizardMetricServices(MetricRegistry metricRegistry) {
		return new DropwizardMetricServices(metricRegistry);
	}

	@Bean
	public PublicMetrics dropwizardPublicMetrics(MetricRegistry metricRegistry) {
		MetricRegistryMetricReader reader = new MetricRegistryMetricReader(metricRegistry);
		return new MetricReaderPublicMetrics(reader);
	}

}