/*
* 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.support;
import javax.servlet.ServletContext;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.context.config.ConfigFileApplicationListener;
import org.springframework.boot.context.event.ApplicationEnvironmentPreparedEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.core.Ordered;
import org.springframework.web.context.ConfigurableWebEnvironment;
/**
* An {@link ApplicationListener} that initializes the {@link SpringApplication} using the
* {@link ServletContext}.
*
* @author Andy Wilkinson
*/
final class ServletContextApplicationListener
implements ApplicationListener<ApplicationEnvironmentPreparedEvent>, Ordered {
private final ServletContext servletContext;
ServletContextApplicationListener(ServletContext servletContext) {
this.servletContext = servletContext;
}
@Override
public int getOrder() {
return ConfigFileApplicationListener.DEFAULT_ORDER - 1;
}
@Override
public void onApplicationEvent(ApplicationEnvironmentPreparedEvent event) {
if (event.getEnvironment() instanceof ConfigurableWebEnvironment) {
((ConfigurableWebEnvironment) event.getEnvironment())
.initPropertySources(this.servletContext, null);
}
}
}