/*
 * Copyright 2012-2019 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.boot.actuate.amqp;

import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.boot.actuate.health.AbstractHealthIndicator;
import org.springframework.boot.actuate.health.Health;
import org.springframework.boot.actuate.health.HealthIndicator;
import org.springframework.util.Assert;

Simple implementation of a HealthIndicator returning status information for the RabbitMQ messaging system. 
Author:
Christian Dupuis
Since:
1.1.0/**
 * Simple implementation of a {@link HealthIndicator} returning status information for the
 * RabbitMQ messaging system.
 *
 * @author Christian Dupuis
 * @since 1.1.0
 */
public class RabbitHealthIndicator extends AbstractHealthIndicator {

	private final RabbitTemplate rabbitTemplate;

	public RabbitHealthIndicator(RabbitTemplate rabbitTemplate) {
		super("Rabbit health check failed");
		Assert.notNull(rabbitTemplate, "RabbitTemplate must not be null");
		this.rabbitTemplate = rabbitTemplate;
	}

	@Override
	protected void doHealthCheck(Health.Builder builder) throws Exception {
		builder.up().withDetail("version", getVersion());
	}

	private String getVersion() {
		return this.rabbitTemplate
				.execute((channel) -> channel.getConnection().getServerProperties().get("version").toString());
	}

}