/*
 * Copyright 2013-2019 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.cloud.sleuth.instrument.hystrix;

import brave.Tracing;
import com.netflix.hystrix.HystrixCommand;

import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.cloud.sleuth.SpanNamer;
import org.springframework.cloud.sleuth.autoconfig.TraceAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * {@link org.springframework.boot.autoconfigure.EnableAutoConfiguration
 * Auto-configuration} that registers a custom Sleuth
 * {@link com.netflix.hystrix.strategy.concurrency.HystrixConcurrencyStrategy}.
 *
 * @author Marcin Grzejszczak
 * @since 1.0.0
 * @see SleuthHystrixConcurrencyStrategy
 */
@Configuration
@AutoConfigureAfter(TraceAutoConfiguration.class)
@ConditionalOnClass(HystrixCommand.class)
@ConditionalOnBean(Tracing.class)
@ConditionalOnProperty(value = "spring.sleuth.hystrix.strategy.enabled",
		matchIfMissing = true)
public class SleuthHystrixAutoConfiguration {

	@Bean
	SleuthHystrixConcurrencyStrategy sleuthHystrixConcurrencyStrategy(Tracing tracing,
			SpanNamer spanNamer) {
		return new SleuthHystrixConcurrencyStrategy(tracing, spanNamer);
	}

}
