/*
* Copyright 2004-2015 the Seasar Foundation and the Others.
*
* 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.seasar.framework.container.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.seasar.framework.container.ExternalContext;
import org.seasar.framework.container.S2Container;
import org.seasar.framework.container.factory.SingletonS2ContainerFactory;
import org.seasar.framework.exception.EmptyRuntimeException;
import org.seasar.framework.log.Logger;
/**
* {@link S2Container}用の {@link Filter}です。
*
* @author higa
*
*/
public class S2ContainerFilter implements Filter {
/**
* HTTP セッションを無効にする場合のキーです。
*
* @see #invalidateSession(ServletRequest)
*/
public static final String INVALIDATE_SESSION = "Seasar2-invalidateSession";
private static final Logger logger = Logger
.getLogger(S2ContainerFilter.class);
/**
* {@link S2ContainerFilter}を作成します。
*/
public S2ContainerFilter() {
}
public void init(FilterConfig config) throws ServletException {
}
public void destroy() {
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
S2Container container = SingletonS2ContainerFactory.getContainer();
ExternalContext externalContext = container.getExternalContext();
if (externalContext == null) {
throw new EmptyRuntimeException("externalContext");
}
final Object originalRequest = externalContext.getRequest();
final Object originalResponse = externalContext.getResponse();
try {
externalContext.setRequest(request);
externalContext.setResponse(response);
chain.doFilter(request, response);
} finally {
externalContext.setRequest(originalRequest);
externalContext.setResponse(originalResponse);
invalidateSession(request);
}
}
/**
* リクエストの属性に{@link #INVALIDATE_SESSION}が{@link Boolean#TRUE}で設定されていた場合、
* {@link HttpSession}を破棄します。
*
* @param request
* リクエスト
*/
protected void invalidateSession(final ServletRequest request) {
final Object invalidateSession = request
.getAttribute(INVALIDATE_SESSION);
if (Boolean.TRUE.equals(invalidateSession)) {
final HttpSession session = ((HttpServletRequest) request)
.getSession(false);
if (session != null) {
final String id = session.getId();
session.invalidate();
if (logger.isDebugEnabled()) {
logger.log("DSSR0117", new Object[] { id });
}
}
}
}
}