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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements. See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache license, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License. You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the license for the specific language governing permissions and
    15   * limitations under the license.
    16   */
    17  package org.apache.logging.log4j.jcl;
    18
    19  import java.io.IOException;
    20  import java.util.concurrent.ConcurrentHashMap;
    21  import java.util.concurrent.ConcurrentMap;
    22
    23  import org.apache.commons.logging.Log;
    24  import org.apache.commons.logging.LogConfigurationException;
    25  import org.apache.commons.logging.LogFactory;
    26  import org.apache.logging.log4j.spi.LoggerAdapter;
    27
    28  /**
    29   * Log4j binding for Commons Logging.
    30   * {@inheritDoc}
    31   */
    32  public class LogFactoryImpl extends LogFactory {
    33
    34      private final LoggerAdapter<Log> adapter = new LogAdapter();
    35
    36      private final ConcurrentMap<String, Object> attributes = new ConcurrentHashMap<String, Object>();
    37
    38      @Override
    39      public Log getInstance(final String name) throws LogConfigurationException {
    40          return adapter.getLogger(name);
    41      }
    42
    43      @Override
    44      public Object getAttribute(final String name) {
    45          return attributes.get(name);
    46      }
    47
    48      @Override
    49      public String[] getAttributeNames() {
    50          return attributes.keySet().toArray(new String[attributes.size()]);
    51      }
    52
    53      @Override
    54      public Log getInstance(@SuppressWarnings("rawtypes") final Class clazz) throws LogConfigurationException {
    55          return getInstance(clazz.getName());
    56      }
    57
    58      /**
    59       * This method is supposed to clear all loggers. In this implementation it will clear all the logger
    60       * wrappers but the loggers managed by the underlying logger context will not be.
    61       */
    62      @Override
    63      public void release() {
    64          try {
    65              adapter.close();
    66          } catch (final IOException ignored) {
    67          }
    68      }
    69
    70      @Override
    71      public void removeAttribute(final String name) {
    72          attributes.remove(name);
    73      }
    74
    75      @Override
    76      public void setAttribute(final String name, final Object value) {
    77          if (value != null) {
    78              attributes.put(name, value);
    79          } else {
    80              removeAttribute(name);
    81          }
    82      }
    83
    84  }