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Spring Cloud Sleuth AutoConfigure

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/*
 * Copyright 2013-2021 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.autoconfig.brave;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

import org.springframework.boot.autoconfigure.condition.AnyNestedCondition;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Conditional;

/**
 * Conditional on Brave tracer.
 *
 * @author Marcin Grzejszczak
 * @since 3.0.0
 */
@Target({ ElementType.TYPE, ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER })
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Conditional(AnyTracerModePropertySetCondition.class)
public @interface ConditionalOnBraveEnabled {

}

final class AnyTracerModePropertySetCondition extends AnyNestedCondition {

	private AnyTracerModePropertySetCondition() {
		super(ConfigurationPhase.REGISTER_BEAN);
	}

	@ConditionalOnProperty(value = "spring.sleuth.tracer.mode", havingValue = "AUTO", matchIfMissing = true)
	static class OnAutoTracerMode {

	}

	@ConditionalOnProperty(value = "spring.sleuth.tracer.mode", havingValue = "BRAVE")
	static class OnConcreteTracerMode {

	}

}