at.molindo.notify.servlet.NotifyFilter.java Source code

Introduction

Here is the source code for at.molindo.notify.servlet.NotifyFilter.java

Source

/**
 * Copyright 2010 Molindo GmbH
 *
 * 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 at.molindo.notify.servlet;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.springframework.web.filter.DelegatingFilterProxy;

/**
 * simplistic version of {@link DelegatingFilterProxy}
 * 
 * @author stf
 */
public class NotifyFilter implements Filter {

    private NotifyFilterBean _notifyFilterBean;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        _notifyFilterBean = findNotifyFilterBean(findWebApplicationContext(filterConfig.getServletContext()));
        if (_notifyFilterBean == null) {
            throw new ServletException("couldn't find NotifyFilterBean");
        }
    }

    protected NotifyFilterBean findNotifyFilterBean(WebApplicationContext webApplicationContext) {
        return webApplicationContext.getBean(NotifyFilterBean.class);
    }

    protected WebApplicationContext findWebApplicationContext(ServletContext servletContext) {
        return WebApplicationContextUtils.getWebApplicationContext(servletContext);
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        _notifyFilterBean.doFilter(request, response, chain);
    }

    @Override
    public void destroy() {
    }
}