ProgrammaticlLoggingLog4j2

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package log4jtest;

import java.io.Serializable;
import java.util.concurrent.TimeUnit;
import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.Appender;
import org.apache.logging.log4j.core.Layout;
import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.core.appender.RollingFileAppender;
import org.apache.logging.log4j.core.appender.rolling.CompositeTriggeringPolicy;
import org.apache.logging.log4j.core.appender.rolling.DefaultRolloverStrategy;
import org.apache.logging.log4j.core.appender.rolling.SizeBasedTriggeringPolicy;
import org.apache.logging.log4j.core.appender.rolling.TimeBasedTriggeringPolicy;
import org.apache.logging.log4j.core.config.AppenderRef;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.LoggerConfig;
import org.apache.logging.log4j.core.layout.PatternLayout;

/**
 *
 * @author vavasing
 */
public class LogToFile {

    public static final String LOG_PATTERN = "%d{yyyy-MM-dd HH:mm:ss} [%-5level] MyApp - %msg%n";
    public static final String LOG_FILE_PATTERN = "-%d{dd-MM-yyyy-HH}.%i.log";
    public static final String MY_LOG_PATTERN_LAYOUT = "%c -- %C -- %msg -- %n";

    public static void main(String[] args) {

        /* Configuring Logger context */
        final LoggerContext context = (LoggerContext) LogManager.getContext(false);
        final Configuration config = context.getConfiguration();
        final Layout<? extends Serializable> layout = PatternLayout.createLayout(MY_LOG_PATTERN_LAYOUT, null, config, null, null, true, true, null, null);


        /* Configuring policies */
        //final TimeBasedTriggeringPolicy timeBasedTriggeringPolicy = TimeBasedTriggeringPolicy.createPolicy(String.valueOf(TimeUnit.DAYS.toMillis(1)), "true");
        final SizeBasedTriggeringPolicy sizeBasedTriggeringPolicy = SizeBasedTriggeringPolicy.createPolicy(String.valueOf(1024));
        //final CompositeTriggeringPolicy policy = CompositeTriggeringPolicy.createPolicy(timeBasedTriggeringPolicy,sizeBasedTriggeringPolicy);
        final DefaultRolloverStrategy strategy = DefaultRolloverStrategy.createStrategy("50", "1", "max", null, null, false, config);

        /* Creating appenders */
        final Appender appender = RollingFileAppender.createAppender("target/logs/test.log", "target/logs/test-%i.log", "true", "log-file-appender", null, null, "true", sizeBasedTriggeringPolicy, strategy, layout, null, null, null, null, config);
        appender.start();
        AppenderRef ref = AppenderRef.createAppenderRef("log-file-appender", null, null);
        AppenderRef[] refs = new AppenderRef[]{ref};

        /*Creating loggers*/
        LoggerConfig loggerConfig = LoggerConfig.createLogger("false", Level.ERROR, "logger", "com.*", refs, null, config, null);
        loggerConfig.addAppender(appender, null, null);
        config.addLogger("logger", loggerConfig);
        context.updateLoggers();

        Logger logger = context.getLogger("logger");
        logger.error("test data");
        logger.error("test data2");
        logger.error("test data");
        logger.error("test data2");
        logger.error("test data");
        logger.error("test data2");
        logger.error("test data");
        logger.error("test data2");
        logger.error("test data");
        logger.error("test data2");
    }

}