com.dahuatech.hutool.log.dialect.log4j2.Log4j2Log Maven / Gradle / Ivy

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package com.dahuatech.hutool.log.dialect.log4j2;

import com.dahuatech.hutool.core.util.StrUtil;
import com.dahuatech.hutool.log.AbstractLog;
import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.spi.AbstractLogger;

/**
 * Apache Log4J 2 log.

 *
 * @author Looly
 */
public class Log4j2Log extends AbstractLog {
  private static final long serialVersionUID = -6843151523380063975L;

  private final transient Logger logger;

  // ------------------------------------------------------------------------- Constructor
  public Log4j2Log(Logger logger) {
    this.logger = logger;
  }

  public Log4j2Log(Class clazz) {
    this(LogManager.getLogger(clazz));
  }

  public Log4j2Log(String name) {
    this(LogManager.getLogger(name));
  }

  @Override
  public String getName() {
    return logger.getName();
  }

  // ------------------------------------------------------------------------- Trace
  @Override
  public boolean isTraceEnabled() {
    return logger.isTraceEnabled();
  }

  @Override
  public void trace(String fqcn, Throwable t, String format, Object... arguments) {
    logIfEnabled(fqcn, Level.TRACE, t, format, arguments);
  }

  // ------------------------------------------------------------------------- Debug
  @Override
  public boolean isDebugEnabled() {
    return logger.isDebugEnabled();
  }

  @Override
  public void debug(String fqcn, Throwable t, String format, Object... arguments) {
    logIfEnabled(fqcn, Level.DEBUG, t, format, arguments);
  }

  // ------------------------------------------------------------------------- Info
  @Override
  public boolean isInfoEnabled() {
    return logger.isInfoEnabled();
  }

  @Override
  public void info(String fqcn, Throwable t, String format, Object... arguments) {
    logIfEnabled(fqcn, Level.INFO, t, format, arguments);
  }

  // ------------------------------------------------------------------------- Warn
  @Override
  public boolean isWarnEnabled() {
    return logger.isWarnEnabled();
  }

  @Override
  public void warn(String fqcn, Throwable t, String format, Object... arguments) {
    logIfEnabled(fqcn, Level.WARN, t, format, arguments);
  }

  // ------------------------------------------------------------------------- Error
  @Override
  public boolean isErrorEnabled() {
    return logger.isErrorEnabled();
  }

  @Override
  public void error(String fqcn, Throwable t, String format, Object... arguments) {
    logIfEnabled(fqcn, Level.ERROR, t, format, arguments);
  }

  // ------------------------------------------------------------------------- Log
  @Override
  public void log(
      String fqcn,
      com.dahuatech.hutool.log.level.Level level,
      Throwable t,
      String format,
      Object... arguments) {
    Level log4j2Level;
    switch (level) {
      case TRACE:
        log4j2Level = Level.TRACE;
        break;
      case DEBUG:
        log4j2Level = Level.DEBUG;
        break;
      case INFO:
        log4j2Level = Level.INFO;
        break;
      case WARN:
        log4j2Level = Level.WARN;
        break;
      case ERROR:
        log4j2Level = Level.ERROR;
        break;
      default:
        throw new Error(StrUtil.format("Can not identify level: {}", level));
    }
    logIfEnabled(fqcn, log4j2Level, t, format, arguments);
  }

  // ------------------------------------------------------------------------- Private method
  /**
   * 打印日志

   * 此方法用于兼容底层日志实现，通过传入当前包装类名，以解决打印日志中行号错误问题
   *
   * @param fqcn 完全限定类名(Fully Qualified Class Name)，用于纠正定位错误行号
   * @param level 日志级别，使用org.apache.logging.log4j.Level中的常量
   * @param t 异常
   * @param msgTemplate 消息模板
   * @param arguments 参数
   */
  private void logIfEnabled(
      String fqcn, Level level, Throwable t, String msgTemplate, Object... arguments) {
    if (this.logger.isEnabled(level)) {
      if (this.logger instanceof AbstractLogger) {
        ((AbstractLogger) this.logger)
            .logIfEnabled(fqcn, level, null, StrUtil.format(msgTemplate, arguments), t);
      } else {
        // FQCN无效
        this.logger.log(level, StrUtil.format(msgTemplate, arguments), t);
      }
    }
  }
}