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 org.apache.camel.spring.boot;
  
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.util.Properties;
  import org.apache.camel.util.StringHelper;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.context.ApplicationContext;
  import org.springframework.core.env.PropertySource;
  import org.springframework.core.io.Resource;
  
  /**
   * To load properties from files, such as a secret mounted to the container.
   */
  public class FilePropertySource extends PropertySource {
  
      private static final Logger LOG = LoggerFactory.getLogger(FilePropertySource.class);
  
      // properties for all the loaded files
      private final Properties properties;
  
      public FilePropertySource(String name, ApplicationContext applicationContext, String directory) {
          super(name);
          StringHelper.notEmpty(directory, "directory");
  
          Properties loaded = new Properties();
          try {
              Resource[] files = applicationContext.getResources(directory);
              for (Resource file : files) {
                  if (file.exists()) {
                      try (FileInputStream fis = new FileInputStream(file.getFile())) {
                          LOG.debug("Loading properties from file: {}", file);
                          Properties extra = new Properties();
                          extra.load(fis);
                          if (!extra.isEmpty()) {
                              loaded.putAll(extra);
                          }
                      } catch (IOException e) {
                          // ignore
                      }
                  }
              }
          } catch (IOException e) {
              // ignore
          }
  
          // if we loaded any files then store as properties
          if (loaded.isEmpty()) {
              properties = null;
              LOG.warn("No properties found while loading from: {}", directory);
          } else {
              properties = loaded;
              LOG.info("Loaded {} properties from: {}", properties.size(), directory);
          }
      }
  
      @Override
      public Object getProperty(String name) {
          Object answer = properties != null ? properties.getProperty(name) : null;
          LOG.trace("getProperty {} -> {}", name, answer);
          return answer;
      }
  }
  