/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements. See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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.apache.logging.log4j.appserver.jetty;
  
  import org.apache.logging.log4j.Level;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.spi.ExtendedLogger;
  import org.apache.logging.log4j.spi.LoggerContext;
  import org.eclipse.jetty.util.log.AbstractLogger;
  import org.eclipse.jetty.util.log.Logger;
  
  /**
   * Provides a native Apache Log4j 2 logger for Eclipse Jetty logging.
   *
   * <p>
   * To direct Jetty to use this class, set the system property {{org.eclipse.jetty.util.log.class}} to this class name.
   * </p>
   *
   * <p>
   * From the command line with:
   * </p>
   * <pre>-Dorg.eclipse.jetty.util.log.class = org.apache.logging.log4j.appserver.jetty.Log4j2Logger</pre>
   *
   * <p>
   * Programmatically with:
   * </p>
   * <pre>System.setProperty("org.eclipse.jetty.util.log.class", "org.apache.logging.log4j.appserver.jetty.Log4j2Logger");</pre>
   *
   * @since Apache Log4j 2.10.0
   */
  public class Log4j2Logger extends AbstractLogger {
  
      private static final String PARENT_FQCN = AbstractLogger.class.getName();
      /**
       * Internal LogManager. Applications call AbstractLogger's getLogger() method so that class must be used
       * as the parent to locate the caller's ClassLoader.
       */
      private static class PrivateManager extends LogManager {
  
          public static LoggerContext getContext() {
              final ClassLoader cl = AbstractLogger.class.getClassLoader();
              return getContext(PARENT_FQCN, cl, false);
          }
  
          public static ExtendedLogger getLogger(final String name) {
              return getContext().getLogger(name);
          }
      }
  
      static final String FQCN = Log4j2Logger.class.getName();
      private final ExtendedLogger logger;
  
      private final String name;
  
      public Log4j2Logger() {
          this("");
      }
  
      public Log4j2Logger(final String name) {
          this.name = name;
          this.logger = PrivateManager.getLogger(name);
      }
  
      /*
       * (non-Javadoc)
       *
       * @see org.eclipse.jetty.util.log.Logger#debug(java.lang.String, java.lang.Object[])
       */
      @Override
      public void debug(final String msg, final Object... args) {
          logger.logIfEnabled(FQCN, Level.DEBUG, null, msg, args);
      }
  
      /*
       * (non-Javadoc)
       *
       * @see org.eclipse.jetty.util.log.Logger#debug(java.lang.String, java.lang.Throwable)
       */
      @Override
      public void debug(final String msg, final Throwable thrown) {
          logger.logIfEnabled(FQCN, Level.DEBUG, null, msg, thrown);
      }
  
      /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jetty.util.log.Logger#debug(java.lang.Throwable)
      */
     @Override
     public void debug(final Throwable thrown) {
         logger.logIfEnabled(FQCN, Level.DEBUG, null, (Object) null, thrown);
     }
 
     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jetty.util.log.Logger#getName()
      */
     @Override
     public String getName() {
         return name;
     }
 
     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jetty.util.log.Logger#ignore(java.lang.Throwable)
      */
     @Override
     public void ignore(final Throwable ignored) {
         // Really do nothing
     }
 
     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jetty.util.log.Logger#info(java.lang.String, java.lang.Object[])
      */
     @Override
     public void info(final String msg, final Object... args) {
         logger.logIfEnabled(FQCN, Level.INFO, null, msg, args);
     }
 
     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jetty.util.log.Logger#info(java.lang.String, java.lang.Throwable)
      */
     @Override
     public void info(final String msg, final Throwable thrown) {
         logger.logIfEnabled(FQCN, Level.INFO, null, msg, thrown);
     }
 
     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jetty.util.log.Logger#info(java.lang.Throwable)
      */
     @Override
     public void info(final Throwable thrown) {
         logger.logIfEnabled(FQCN, Level.INFO, null, (Object) null, thrown);
     }
 
     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jetty.util.log.Logger#isDebugEnabled()
      */
     @Override
     public boolean isDebugEnabled() {
         return logger.isDebugEnabled();
     }
 
     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jetty.util.log.AbstractLogger#newLogger(java.lang.String)
      */
     @Override
     protected Logger newLogger(final String fullname) {
         return new Log4j2Logger(fullname);
     }
 
     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jetty.util.log.Logger#setDebugEnabled(boolean)
      */
     @Override
     public void setDebugEnabled(final boolean enabled) {
         warn("setDebugEnabled not implemented");
     }
 
     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jetty.util.log.Logger#warn(java.lang.String, java.lang.Object[])
      */
     @Override
     public void warn(final String msg, final Object... args) {
         logger.logIfEnabled(FQCN, Level.WARN, null, msg, args);
     }
 
     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jetty.util.log.Logger#warn(java.lang.String, java.lang.Throwable)
      */
     @Override
     public void warn(final String msg, final Throwable thrown) {
         logger.logIfEnabled(FQCN, Level.WARN, null, msg, thrown);
     }
 
     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jetty.util.log.Logger#warn(java.lang.Throwable)
      */
     @Override
     public void warn(final Throwable thrown) {
         logger.logIfEnabled(FQCN, Level.WARN, null, (Object) null, thrown);
     }
 
 }