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package com.fr.decision.fun;

import com.fr.stable.fun.mark.Mutable;

import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 内置的Servlet的过滤器
 */
public interface EmbedRequestFilterProvider extends Mutable {

    String MARK_STRING = "EmbedRequestFilterProvider";

    int CURRENT_LEVEL = 2;

    /**
     * 初始化过滤器
     * 注：该接口生效必须重启服务器
     * @param filterConfig 过滤器配置
     */
    void init(FilterConfig filterConfig);

    /**
     * 过滤servlet
     * @param req http请求
     * @param res http响应
     */
    void filter(HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException;


    /**
     * 销毁过滤器
     */
    void destroy();
}

<extra-decision>
    <EmbedRequestFilterProvider class="your class name"/>
</extra-decision>