Log4jInitializer.java

package jetbrains.mps.tool.environment;

/*Generated by MPS */

import java.io.File;
import jetbrains.mps.core.tool.environment.util.PathManager;
import jetbrains.mps.util.FileUtil;
import jetbrains.mps.util.StringUtil;
import org.apache.log4j.xml.DOMConfigurator;
import java.io.StringReader;
import org.apache.log4j.LogManager;

/**
 * need this class to read log.xml configuration file even when there is no idea platform
 */
public final class Log4jInitializer {
  private static final String SYSTEM_MACRO = "$SYSTEM_DIR$";
  private static final String APPLICATION_MACRO = "$APPLICATION_DIR$";
  private static final String LOG_DIR_MACRO = "$LOG_DIR$";

  public void init() {
    System.setProperty("log4j.defaultInitOverride", "true");
    File logXmlFile = new File(PathManager.getHomePath() + "/bin/log.xml");
    if (!(logXmlFile.exists())) {
      System.err.println("log.xml file does not exist! Path: [$home/bin/log.xml]");
      return;
    }
    String text = FileUtil.read(logXmlFile);
    text = StringUtil.replace(text, SYSTEM_MACRO, StringUtil.replace(PathManager.getSystemPath(), "\\", "\\\\"));
    text = StringUtil.replace(text, APPLICATION_MACRO, StringUtil.replace(PathManager.getHomePath(), "\\", "\\\\"));
    text = StringUtil.replace(text, LOG_DIR_MACRO, StringUtil.replace(PathManager.getLogPath(), "\\", "\\\\"));
    File file = new File(PathManager.getLogPath());
    if (!(file.mkdirs()) && !(file.exists())) {
      System.err.println("Cannot create log directory: " + file);
    }
    new DOMConfigurator().doConfigure(new StringReader(text), LogManager.getLoggerRepository());

    LogManager.getLogger("").info("Log4j has been initialized successfully");
  }
}