/*
 * 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.admin;

/**
 * An MBean contract to control and monitor a running {@code SpringApplication} via JMX. 
 * Intended for internal use only. 
 *
 * @author Stephane Nicoll
 * @since 1.3.0
 */
public interface SpringApplicationAdminMXBean {

	/**
	 * Specify if the application has fully started and is now ready. 
	 * @return {@code true} if the application is ready
	 * @see org.springframework.boot.context.event. ApplicationReadyEvent
	 */
	boolean isReady();

	/**
	 * Specify if the application runs in an embedded web container.  Return {@code false}
	 * on a web application that hasn't fully started yet, so it is preferable to wait for
	 * the application to be {@link #isReady() ready}. 
	 * @return {@code true} if the application runs in an embedded web container
	 * @see #isReady()
	 */
	boolean isEmbeddedWebApplication();

	/**
	 * Return the value of the specified key from the application
	 * {@link org.springframework.core.env. Environment Environment}. 
	 * @param key the property key
	 * @return the property value or {@code null} if it does not exist
	 */
	String getProperty(String key);

	/**
	 * Shutdown the application. 
	 * @see org.springframework.context. ConfigurableApplicationContext#close()
	 */
	void shutdown();

}
