counterhandler.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.mortbay.jetty.servlet.wadi;

import java.io.IOException;
import java.io.PrintWriter;

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

import org.mortbay.jetty.MimeTypes;
import org.mortbay.jetty.handler.AbstractHandler;

public class CounterHandler extends AbstractHandler {
    
    public void handle(String target, HttpServletRequest request, HttpServletResponse response, int dispatch)
            throws IOException, ServletException {
        HttpSession session = request.getSession();
        Integer counter = (Integer) session.getAttribute("counter");
        if (null == counter) {
            counter = 0;
        }
        counter += 1;
        session.setAttribute("counter", counter);

        response.setStatus(HttpServletResponse.SC_OK);
        response.setContentType(MimeTypes.TEXT_HTML);
        response.setContentLength((counter + "").length());
        PrintWriter writer = response.getWriter();
        writer.print(counter);
        writer.flush();
    }

}