Question

所以我为Log4J创建了一个自定义appender，它基本上和socketappender一样，但是使用UDP而不是TCP。但是，我无法让日志显示日期。我认为.properties文件可能存在问题，但我不确定是什么。特别是因为我知道.properties文件在某种程度上起作用，因为这是测试程序知道使用哪个appender的方式。但是，它不使用.properties文件中指定的布局。任何帮助/建议将不胜感激！

Appender代码：

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;

import org.apache.log4j.AppenderSkeleton;

import org.apache.log4j.spi.LoggingEvent;


public /*static*/ class UDPAppender extends AppenderSkeleton {

    @Override
protected void append(LoggingEvent event) {
        String message = null;
            event.getProperties();
            StringBuilder formatedMessage = new StringBuilder();
            formatedMessage.append("Level:");
            formatedMessage.append(event.getLevel());
            formatedMessage.append(", FILE:");
            formatedMessage.append(event.getLocationInformation().getFileName());
            formatedMessage.append(", Thread Id:");
            formatedMessage.append(event.getLocationInformation().getLineNumber());
            formatedMessage.append(", ERROR: ");
            formatedMessage.append(event.getMessage().toString());
            message = formatedMessage.toString();
            DatagramSocket clientSocket = null;
            //creating DatagramSocket to send logger info to socket; if not created, will print Stack Trace
            try {
                clientSocket = new DatagramSocket();
            } catch (SocketException e) {
                e.printStackTrace();
            }
            InetAddress IPAddress = null;
            //get InetAddress for sending packet
            try {
                IPAddress = InetAddress.getByName("localhost");
            } catch (UnknownHostException e) {
                e.printStackTrace();
            }
            byte[] sendData = new byte[1024];

            sendData = message.getBytes(); //convert from String to bytes so that message can be sent through datagrampacket
            DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, 27770); //address packet
            try {
                clientSocket.send(sendPacket); //send packet to the socket addressed above
            } catch (IOException e) {
                e.printStackTrace();
            }
            clientSocket.close(); //need to close 
}

public void close()     {
}

public boolean requiresLayout()    {
    return true;
}



}

测试代码：

import org.apache.log4j.*;
public class Tester {   
private static final Logger log2 = Logger.getLogger("REMOTE");

public static void main(String[] args) { 
    //configures using the .properties file user creates
    PropertyConfigurator.configure("log4j.properties");
    log2.info("This is info message");   
    System.out.println("Logging complete"); 
    //prints to console to let user know logging completed successfully
    LogManager.shutdown();
    //closes logs once logging is complete
    }
}

.properties文件：

log4j.logger.REMOTE=DEBUG, REMOTE
log4j.appender.REMOTE=custom.UDPAppender
log4j.appender.REMOTE.layout=org.apache.log4j.PatternLayout 
log4j.appender.REMOTE.layout.ConversionPattern=%d{MMMM dd HH:mm:ss}, %d{yyyy} %F %L %m %t

Answer 1

我实际上只能使用以下代码将时间戳转换为日期/时间：

long date = event.getTimeStamp();
Date dateObj = new Date(date);
DateFormat df = new SimpleDateFormat("MM-dd-yyyy HH:mm:ss");
StringBuilder formatedMessage = new StringBuilder();
            formatedMessage.append("Time:");
            formatedMessage.append(df.format(dateObj));

Log4j自定义Appender属性文件问题

1 个答案: