com.taobao.diamond.server.interceptor.FlowControlInterceptor.java Source code

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Here is the source code for com.taobao.diamond.server.interceptor.FlowControlInterceptor.java

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/*
 * (C) 2007-2012 Alibaba Group Holding Limited.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 * Authors:
 *   leiwen <chrisredfield1985@126.com> , boyan <killme2008@gmail.com>
 */
package com.taobao.diamond.server.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import com.taobao.diamond.server.service.FlowControlService;

public class FlowControlInterceptor extends HandlerInterceptorAdapter implements HandlerInterceptor {

    static final Log log = LogFactory.getLog(FlowControlInterceptor.class);

    public static int ORDINAL_403_Forbidden = 403;
    @Autowired
    private FlowControlService flowControlService;

    public FlowControlService getFlowControlService() {
        return flowControlService;
    }

    public void setFlowControlService(FlowControlService flowControlService) {
        this.flowControlService = flowControlService;
    }

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        boolean handlerOk = super.preHandle(request, response, handler);
        if (handlerOk) {
            boolean fcAccess = doACLAndFlowControl(request, response);
            if (!fcAccess) {
                String remoteIp = getRemoteIP(request);
                String msg = remoteIp + ":trigger flow control:invoke per second:" + getCurrentCount(remoteIp);
                log.warn(msg);
                System.out.println(msg);
                response.sendError(HttpServletResponse.SC_FORBIDDEN, "over_flow_control");
                return false;
            }
            return true;
        }
        return false;
    }

    private boolean doACLAndFlowControl(HttpServletRequest request, HttpServletResponse response) {

        //boolean aclAccess = aCLService.check(remoteIp);
        String remoteIp = getRemoteIP(request);
        boolean fcAccess = flowControlService.check(remoteIp);
        return fcAccess;
    }

    private int getCurrentCount(String remoteIp) {
        return flowControlService.getCurrentCount(remoteIp);
    }

    private String getRemoteIP(HttpServletRequest request) {
        String remoteIP = request.getRemoteAddr();
        if (remoteIP.equals("127.0.0.1")) {
            remoteIP = request.getHeader("X-Real-IP");
        }
        return remoteIP;
    }

    //   public void postHandle(HttpServletRequest request,
    //         HttpServletResponse response, Object handler,
    //         ModelAndView modelAndView) throws Exception {
    //      // TODO Auto-generated method stub
    //      
    //   }
    //
    //   public void afterCompletion(HttpServletRequest request,
    //         HttpServletResponse response, Object handler, Exception ex)
    //         throws Exception {
    //      // TODO Auto-generated method stub
    //      
    //   }

}