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A continuously growing collection of utilities to measure performance, get better diagnostics, improve performance, or do things more reliably, faster that other open source libraries...
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/*
 * Copyright (c) 2001-2017, Zoltan Farkas All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Additionally licensed with:
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.spf4j.log;

import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import javax.annotation.Nullable;
import org.slf4j.Logger;
import org.slf4j.Marker;
import org.spf4j.base.Arrays;

/**
 *
 * @author Zoltan Farkas
 */
public final class LogUtils {

  private LogUtils() {
  }

  @SuppressFBWarnings({"SA_LOCAL_SELF_COMPARISON", "SF_SWITCH_FALLTHROUGH"})
  public static void logUpgrade(final Logger log, @Nullable final Marker marker, final Level level,
          final String format, final Object... pargs) {
    Object[] args = pargs;
    switch (level) {
      case TRACE:
        if (log.isTraceEnabled()) {
          if (marker == null) {
            log.trace(format, args);
          } else {
            log.trace(marker, format, args);
          }
          break;
        } else {
          if (args == pargs) {
            args = Arrays.append(args, LogAttribute.origLevel(level));
          }
        }
      case DEBUG:
        if (log.isDebugEnabled()) {
          if (marker == null) {
            log.debug(format, args);
          } else {
            log.debug(marker, format, args);
          }
          break;
        } else {
          if (args == pargs) {
            args = Arrays.append(args, LogAttribute.origLevel(level));
          }
        }
      case INFO:
        if (log.isInfoEnabled()) {
          if (marker == null) {
            log.info(format, args);
          } else {
            log.info(marker, format, args);
          }
          break;
        } else {
          if (args == pargs) {
            args = Arrays.append(args, LogAttribute.origLevel(level));
          }
        }
      case WARN:
        if (log.isWarnEnabled()) {
          if (marker == null) {
            log.warn(format, args);
          } else {
            log.warn(marker, format, args);
          }
          break;
        } else {
          if (args == pargs) {
            args = Arrays.append(args, LogAttribute.origLevel(level));
          }
        }
      case ERROR:
        if (log.isErrorEnabled()) {
          if (marker == null) {
            log.error(format, args);
          } else {
            log.error(marker, format, args);
          }
          break;
        } else {
          throw new IllegalStateException("Error not enabled for  " + log.getName());
        }
      default:
        throw new IllegalStateException("Invalid level " + level);
    }
  }

  @SuppressFBWarnings({"SA_LOCAL_SELF_COMPARISON", "SF_SWITCH_FALLTHROUGH"})
  public static void logUpgrade(final java.util.logging.Logger log, final Level plevel,
          final String format, final Object... pargs) {
    Level[] values = Level.values();
    Level level = plevel;
    while (true) {
      java.util.logging.Level julLevel = level.getJulLevel();
      if (log.isLoggable(julLevel)) {
        log.log(julLevel, format, pargs);
        return;
      }
      if (level == Level.ERROR) {
        throw new IllegalStateException();
      }
      level = values[level.ordinal() + 1];
    }
  }
}