log4j: log and servlet

  

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.PrintWriter;
import java.io.IOException;
import org.apache.log4j.*;

public class LoggingServlet extends HttpServlet {
    private static Logger logger =Logger.getLogger(LoggingServlet.class);

    public void doPost(HttpServletRequest req, HttpServletResponse res)
                       throws IOException, ServletException
    {
        logger.info("invoked the LoggingServlet...");
        PrintWriter writer = res.getWriter();
        writer.println("Check your web server console...");
        writer.flush();
        writer.close();
    }
}

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9.	define a named logger
10.	set the appender named testAppender to be a console appender
11.	set the layout for the appender testAppender
12.	define the root logger with two appenders writing to console and file
13.	define your own logger named com.foo
14.	and assign level and appender to your own logger
15.	define the appender named FILE
16.	define the appender named CONSOLE
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21.	log4j Configuration File: define your own logger named com.foo
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24.	log4j Configuration File: define the appender named CONSOLE
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27.	log4j.properties: set the appender CONSOLE
28.	log4j.properties: set the appender FILE
29.	log4j.properties: set the appender ROLLING
30.	log4j.properties: set the appender DAILY
31.	log4j.properties: set the layout for the appenders
32.	log4j.properties: file layout
33.	log4j.properties: rolling layout
34.	log4j.properties: daily layout
35.	log4j config file: configuring the root logger
36.	log4j config file: configuring the named logger
37.	log4j config file: configuring the appender CONSOLE
38.	log4j config file: configuring the layout TTCCLayout
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43.	nt.properties for NT configuration
44.	smtp.properties for EMail based logging
45.	Pass the configuration file and configuration class
46.	Logging Servlet with log4j

log4j: log and servlet : Log4j « Language Basics « Java

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