de.christofreichardt.diagnosis.JDKLoggingRouter Maven / Gradle / Ivy

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A trace tool which produces clearly arranged logs by indenting the trace messages depending on the depth of the call stack.

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/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package de.christofreichardt.diagnosis;

import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;

/**
 * This specialised {@link NullTracer} redirects log messages to the core logging facilities of the Java platform,
 * see java.util.logging.
 * The {@link LogLevel}s will be translated into the {@link Level}s used by loggers of the Java platform. All of the other
 * tracing output will be discarded.
 * 
 * @author Christof Reichardt
 */
final public class JDKLoggingRouter extends NullTracer {
  
  /**
   * Translates the {@link LogLevel}s into {@link Level}s. 
   * 
   * @param logLevel the to be translated {@link LogLevel}
   * @return the corresponding {@link Level}
   */
  protected Level convertToJDK14Level(LogLevel logLevel) {
    Level level = Level.OFF;
    
    switch(logLevel) {
      case INFO:
        level = Level.INFO;
        break;
      case WARNING:
        level = Level.WARNING;
        break;
      case ERROR:
      case FATAL:
      case SEVERE:
        level = Level.SEVERE;
        break;
    }
    
    return level;
  }

  /**
   * Calls the {@link Logger} for the given clazz.
   * 
   * @param logLevel the log level
   * @param message the to be logged message
   * @param clazz the originating class
   */
  @Override
  public void logMessage(LogLevel logLevel, String message, Class clazz, String methodName) {
    Logger logger = Logger.getLogger(clazz.getName());
    logger.logp(convertToJDK14Level(logLevel), clazz.getName(), methodName, message);
  }

  /**
   * Calls the {@link Logger} for the given clazz.
   * 
   * @param logLevel the log level
   * @param throwable the to be logged throwable
   * @param clazz the originating class
   */
  @Override
  public void logException(LogLevel logLevel, Throwable throwable, Class clazz, String methodName) {
    Logger logger = Logger.getLogger(clazz.getName());
    logger.logp(convertToJDK14Level(logLevel), clazz.getName(), "-", throwable.getMessage(), throwable);
  }
  
}