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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.core.config.json;
    18
    19  import org.apache.logging.log4j.core.config.Configuration;
    20  import org.apache.logging.log4j.core.config.ConfigurationFactory;
    21  import org.apache.logging.log4j.core.config.ConfigurationSource;
    22  import org.apache.logging.log4j.core.config.Order;
    23  import org.apache.logging.log4j.core.config.plugins.Plugin;
    24  import org.apache.logging.log4j.core.util.Loader;
    25
    26  /**
    27   *
    28   */
    29  @Plugin(name = "JsonConfigurationFactory", category = ConfigurationFactory.CATEGORY)
    30  @Order(6)
    31  public class JsonConfigurationFactory extends ConfigurationFactory {
    32
    33      /**
    34       * The file extensions supported by this factory.
    35       */
    36      private static final String[] SUFFIXES = new String[] {".json", ".jsn"};
    37
    38      private static final String[] dependencies = new String[] {
    39              "com.fasterxml.jackson.databind.ObjectMapper",
    40              "com.fasterxml.jackson.databind.JsonNode",
    41              "com.fasterxml.jackson.core.JsonParser"
    42      };
    43
    44      private final boolean isActive;
    45
    46      public JsonConfigurationFactory() {
    47          for (final String dependency : dependencies) {
    48              if (!Loader.isClassAvailable(dependency)) {
    49                  LOGGER.debug("Missing dependencies for Json support");
    50                  isActive = false;
    51                  return;
    52              }
    53          }
    54          isActive = true;
    55      }
    56
    57      @Override
    58      protected boolean isActive() {
    59          return isActive;
    60      }
    61
    62      @Override
    63      public Configuration getConfiguration(final ConfigurationSource source) {
    64          if (!isActive) {
    65              return null;
    66          }
    67          return new JsonConfiguration(source);
    68      }
    69
    70      @Override
    71      public String[] getSupportedTypes() {
    72          return SUFFIXES;
    73      }
    74  }