Java LayoutWrappingEncoder-class And Method Code Example

Here is an example of how to use the LayoutWrappingEncoder class from the logback library in Java:

import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.encoder.PatternLayoutEncoder;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.FileAppender;
import ch.qos.logback.core.encoder.Encoder;
import ch.qos.logback.core.encoder.LayoutWrappingEncoder;

public class Example {
    public static void main(String[] args) {
        LoggerContext context = new LoggerContext();
        Logger logger = context.getLogger("ExampleLogger");

        FileAppender<ILoggingEvent> appender = new FileAppender<ILoggingEvent>();

        Encoder<ILoggingEvent> encoder = new LayoutWrappingEncoder<ILoggingEvent>();
        PatternLayoutEncoder ple = new PatternLayoutEncoder();
        ple.setPattern("%date %level [%thread] %logger{10} [%file:%line] %msg%n");
        ((LayoutWrappingEncoder) encoder).setLayout(ple.getLayout());

        logger.debug("This is a debug message.");"This is an info message.");
        logger.warn("This is a warn message.");
        logger.error("This is an error message.");

This example shows how to use the LayoutWrappingEncoder to format log messages using the PatternLayoutEncoder. It creates a LoggerContext and a Logger object, and it sets up a FileAppender that writes the logs to a file called "example.log". The Encoder used is a LayoutWrappingEncoder which wraps around the PatternLayoutEncoder and sets the layout to the one defined in the PatternLayoutEncoder . Then it starts the appender, add it to the logger, and log 4 messages to the file example.log.

Please note that

  • You should import the relevant classes for logback
  • The above code is just an example and it does not include the full context of a logging application.