code: /*
   * Copyright 2022 Mitsunori Komatsu (komamitsu)
   *
   * Licensed 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.komamitsu.fluency.fluentd.ingester.sender.heartbeat;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.IOException;
  import java.net.UnixDomainSocketAddress;
  import java.nio.channels.SocketChannel;
  import java.nio.file.Path;
  
  public class UnixSocketHeartbeater
          extends Heartbeater
  {
      private static final Logger LOG = LoggerFactory.getLogger(UnixSocketHeartbeater.class);
      private final Config config;
  
      public UnixSocketHeartbeater()
      {
          this(new Config());
      }
  
      public UnixSocketHeartbeater(final Config config)
      {
          super(config);
          this.config = config;
      }
  
      @Override
      protected void invoke()
              throws IOException
      {
          try (SocketChannel socketChannel = SocketChannel.open(UnixDomainSocketAddress.of(config.getPath()))) {
              LOG.trace("UnixSocketHeartbeat: {}", socketChannel);
              pong();
          }
      }
  
      public Path getPath()
      {
          return config.getPath();
      }
  
      @Override
      public String toString()
      {
          return "UnixSocketHeartbeater{" +
                  "config=" + config +
                  "} " + super.toString();
      }
  
      public static class Config
              extends Heartbeater.Config
      {
          private Path path;
  
          public Path getPath()
          {
              return path;
          }
  
          public void setPath(Path path)
          {
              this.path = path;
          }
      }
  }
  
  