/*
 * Copyright 2012-2017 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
 *
 *      http://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.web.servlet.context;

import org.springframework.boot.web.context.WebServerInitializedEvent;
import org.springframework.boot.web.server.WebServer;
import org.springframework.util.StringUtils;

/**
 * Event to be published after the {@link ServletWebServerApplicationContext} is refreshed
 * and the {@link WebServer} is ready. Useful for obtaining the local port of a running
 * server.
 *
 * <p>
 * Normally it will have been started, but listeners are free to inspect the server and
 * stop and start it if they want to.
 *
 * @author Dave Syer
 */
@SuppressWarnings("serial")
public class ServletWebServerInitializedEvent extends WebServerInitializedEvent {

	private final ServletWebServerApplicationContext applicationContext;

	public ServletWebServerInitializedEvent(
			WebServer source, ServletWebServerApplicationContext applicationContext) {
		super(source);
		this.applicationContext = applicationContext;
	}

	/**
	 * Access the application context that the server was created in. Sometimes it is
	 * prudent to check that this matches expectations (like being equal to the current
	 * context) before acting on the server server itself.
	 * @return the applicationContext that the server was created from
	 */
	@Override
	public ServletWebServerApplicationContext getApplicationContext() {
		return this.applicationContext;
	}

	@Override
	public String getServerId() {
		String name = this.applicationContext.getNamespace();
		if (StringUtils.isEmpty(name)) {
			name = "server";
		}
		return name;
	}

}
