WebRoller

JAVA

ExternallyRolledFileAppenderのWEB版Rollerクラス。
Rollerクラスのコードを流用。



package roller;
import java.io.*;

import java.net.*;
import javax.servlet.*;

import javax.servlet.http.*;
import org.apache.log4j.varia.ExternallyRolledFileAppender;
public class WebRoller extends HttpServlet {
    protected void service(HttpServletRequest req, HttpServletResponse res)

            throws ServletException, IOException {

        req.setCharacterEncoding("MS932");

        String host = req.getParameter("host");

        String port = req.getParameter("port");
        if (host != null && port != null)

            roll(host, port);
        res.setContentType("text/html; charset=Shift_JIS");

        PrintWriter writer = res.getWriter();

        writer.println("<html>");

        writer.println("  <head>");

        writer.println("    <title>Web Roller</title>");

        writer.println("  </head>");

        writer.println("  <body>");

        writer.println("    <form action=\"" + req.getContextPath() + "/roller\" method=\"post\">");

        writer.println("      =>java org.apache.log4j.varia.Roller ");

        writer.println("      <input type=\"text\" name=\"host\" value=\"localhost\"> ");

        writer.println("      <input type=\"text\" name=\"port\" value=\"8938\"><br>");

        writer.println("      <input type=\"submit\" value=\"実行\">");

        writer.println("    </form>");

        writer.println("  </body>");

        writer.println("</html>");

    }
    public void roll(String host, String port) throws NumberFormatException,

            UnknownHostException, IOException {

        Socket socket = new Socket(host, Integer.parseInt(port));

        DataOutputStream dos = new DataOutputStream(socket.getOutputStream());

        DataInputStream dis = new DataInputStream(socket.getInputStream());

        dos.writeUTF(ExternallyRolledFileAppender.ROLL_OVER);

        String rc = dis.readUTF();

        if (ExternallyRolledFileAppender.OK.equals(rc)) {

            System.out.println("Roll over signal acknowledged by remote appender.");

        } else {

            System.err.println("Unexpected return code " + rc

                    + " from remote entity.");

        }

    }
}