/*
    * 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.maven.slf4j;
  
  import java.util.ServiceLoader;
  
  import org.slf4j.ILoggerFactory;
  import org.slf4j.IMarkerFactory;
  import org.slf4j.helpers.BasicMDCAdapter;
  import org.slf4j.helpers.BasicMarkerFactory;
  import org.slf4j.spi.MDCAdapter;
  import org.slf4j.spi.SLF4JServiceProvider;
  
  public class MavenServiceProvider implements SLF4JServiceProvider {
  
      /**
       * Declare the version of the SLF4J API this implementation is compiled against.
       * The value of this field is modified with each major release.
       */
      // to avoid constant folding by the compiler, this field must *not* be final
      @SuppressWarnings({"checkstyle:StaticVariableName", "checkstyle:VisibilityModifier"})
      public static String REQUESTED_API_VERSION = "2.0.99"; // !final
  
      private MavenLoggerFactory loggerFactory = loadMavenLoggerFactory();
      private IMarkerFactory markerFactory = new BasicMarkerFactory();
      private MDCAdapter mdcAdapter = new BasicMDCAdapter();
  
      protected MavenLoggerFactory loadMavenLoggerFactory() {
          return ServiceLoader.load(MavenLoggerFactory.class).findFirst().orElseGet(MavenLoggerFactory::new);
      }
  
      public ILoggerFactory getLoggerFactory() {
          return loggerFactory;
      }
  
      @Override
      public IMarkerFactory getMarkerFactory() {
          return markerFactory;
      }
  
      @Override
      public MDCAdapter getMDCAdapter() {
          return mdcAdapter;
      }
  
      @Override
      public String getRequestedApiVersion() {
          return REQUESTED_API_VERSION;
      }
  
      @Override
      public void initialize() {
          // already initialized
      }
  }