content: /*
   *
   * 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 com.alibaba.cloudapp.starter.observabilities.configurations;
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.env.EnvironmentPostProcessor;
  import org.springframework.core.env.ConfigurableEnvironment;
  import org.springframework.core.env.MapPropertySource;
  
  import java.util.HashMap;
  import java.util.Map;
  
  public class OpenTelemetryLoggingPostProcessor implements
          EnvironmentPostProcessor {
      
      private final String PROPERTY_OT_SOURCE = "CLOUD_APP_OT_PROPERTY";
      private final String LOG_ENABLE_TRACE_ID = "io.cloudapp.observabilities" +
              ".ot.logging.enable-traceid";
      private final String MUTATE_LOG_KEY = "logging.pattern.level";
      
      @Override
      public void postProcessEnvironment(ConfigurableEnvironment environment,
                                         SpringApplication application)  {
          
          String traceEnabled = environment.getProperty(LOG_ENABLE_TRACE_ID, "false");
          boolean traceEnabledBool = Boolean.parseBoolean(traceEnabled);
          if (!traceEnabledBool) {
              return;
          }
          String level = environment.getProperty(MUTATE_LOG_KEY, "%5p");
          String pattern = "[%mdc{trace_id} %mdc{span_id}] " + level;
          
          Map<String, Object> properties = new HashMap<>();
          properties.put(MUTATE_LOG_KEY, pattern);
          environment.getPropertySources().addFirst(new MapPropertySource(PROPERTY_OT_SOURCE, properties));
      }
  }
  