/*
* Copyright 2002-2016 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.web.context.support;
import java.util.Enumeration;
import java.util.LinkedHashSet;
import java.util.Set;
import javax.servlet.ServletContext;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.support.LiveBeansView;
import org.springframework.util.Assert;
/**
* {@link LiveBeansView} subclass which looks for all ApplicationContexts
* in the web application, as exposed in ServletContext attributes.
*
* @author Juergen Hoeller
* @since 3.2
*/
public class ServletContextLiveBeansView extends LiveBeansView {
private final ServletContext servletContext;
/**
* Create a new LiveBeansView for the given ServletContext.
* @param servletContext current ServletContext
*/
public ServletContextLiveBeansView(ServletContext servletContext) {
Assert.notNull(servletContext, "ServletContext must not be null");
this.servletContext = servletContext;
}
@Override
protected Set<ConfigurableApplicationContext> findApplicationContexts() {
Set<ConfigurableApplicationContext> contexts = new LinkedHashSet<>();
Enumeration<String> attrNames = this.servletContext.getAttributeNames();
while (attrNames.hasMoreElements()) {
String attrName = attrNames.nextElement();
Object attrValue = this.servletContext.getAttribute(attrName);
if (attrValue instanceof ConfigurableApplicationContext) {
contexts.add((ConfigurableApplicationContext) attrValue);
}
}
return contexts;
}
}