/*
 * Copyright 2012-2018 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;

import java.time.Duration;

import io.micrometer.core.instrument.Meter;

/**
 * A service level agreement boundary for use when configuring Micrometer. Can be
 * specified as either a {@link Long} (applicable to timers and distribution summaries) or
 * a {@link Duration} (applicable to only timers).
 *
 * @author Phillip Webb
 * @since 2.0.0
 */
public final class ServiceLevelAgreementBoundary {

	private final MeterValue value;

	ServiceLevelAgreementBoundary(MeterValue value) {
		this.value = value;
	}

	/**
	 * Return the underlying value of the SLA in form suitable to apply to the given meter
	 * type.
	 * @param meterType the meter type
	 * @return the value or {@code null} if the value cannot be applied
	 */
	public Long getValue(Meter.Type meterType) {
		return this.value.getValue(meterType);
	}

	/**
	 * Return a new {@link ServiceLevelAgreementBoundary} instance for the given long
	 * value.
	 * @param value the source value
	 * @return a {@link ServiceLevelAgreementBoundary} instance
	 */
	public static ServiceLevelAgreementBoundary valueOf(long value) {
		return new ServiceLevelAgreementBoundary(MeterValue.valueOf(value));
	}

	/**
	 * Return a new {@link ServiceLevelAgreementBoundary} instance for the given String
	 * value.
	 * @param value the source value
	 * @return a {@link ServiceLevelAgreementBoundary} instance
	 */
	public static ServiceLevelAgreementBoundary valueOf(String value) {
		return new ServiceLevelAgreementBoundary(MeterValue.valueOf(value));
	}

}
