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
   *
   *     https://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.avro.ipc;
  
  import java.io.IOException;
  import java.io.EOFException;
  import java.net.InetSocketAddress;
  import java.net.SocketAddress;
  import java.nio.channels.ClosedChannelException;
  import java.nio.channels.ServerSocketChannel;
  import java.nio.channels.SocketChannel;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.avro.AvroRemoteException;
  import org.apache.avro.Protocol;
  import org.apache.avro.Protocol.Message;
  import org.apache.avro.ipc.generic.GenericResponder;
  
  /**
   * A socket-based server implementation. This uses a simple, non-standard wire
   * protocol and is not intended for production services.
   *
   * @deprecated use {@link SaslSocketServer} instead.
   */
  @Deprecated
  public class SocketServer extends Thread implements Server {
    private static final Logger LOG = LoggerFactory.getLogger(SocketServer.class);
  
    private Responder responder;
    private ServerSocketChannel channel;
    private ThreadGroup group;
  
    public SocketServer(Responder responder, SocketAddress addr) throws IOException {
      String name = "SocketServer on " + addr;
  
      this.responder = responder;
      this.group = new ThreadGroup(name);
      this.channel = ServerSocketChannel.open();
  
      channel.socket().bind(addr);
  
      setName(name);
      setDaemon(true);
    }
  
    @Override
    public int getPort() {
      return channel.socket().getLocalPort();
    }
  
    @Override
    public void run() {
      LOG.info("starting " + channel.socket().getInetAddress());
      try {
        while (true) {
          try {
            new Connection(channel.accept());
          } catch (ClosedChannelException e) {
            return;
          } catch (IOException e) {
            LOG.warn("unexpected error", e);
            throw new RuntimeException(e);
          }
        }
      } finally {
        LOG.info("stopping " + channel.socket().getInetAddress());
        try {
          channel.close();
        } catch (IOException e) {
        }
      }
    }
  
    @Override
    public void close() {
      this.interrupt();
      group.interrupt();
    }
  
    /**
     * Creates an appropriate {@link Transceiver} for this server. Returns a
     * {@link SocketTransceiver} by default.
     */
    protected Transceiver getTransceiver(SocketChannel channel) throws IOException {
      return new SocketTransceiver(channel);
    }
  
    private class Connection implements Runnable {
  
      SocketChannel channel;
      Transceiver xc;
  
      public Connection(SocketChannel channel) throws IOException {
        this.channel = channel;
  
        Thread thread = new Thread(group, this);
        thread.setName("Connection to " + channel.socket().getRemoteSocketAddress());
        thread.setDaemon(true);
        thread.start();
      }
  
      @Override
      public void run() {
        try {
          try {
            this.xc = getTransceiver(channel);
            while (true) {
              xc.writeBuffers(responder.respond(xc.readBuffers(), xc));
            }
          } catch (EOFException | ClosedChannelException e) {
          } finally {
            xc.close();
          }
        } catch (IOException e) {
          LOG.warn("unexpected error", e);
        }
      }
  
    }
  
    public static void main(String[] arg) throws Exception {
      Responder responder = new GenericResponder(Protocol.parse("{\"protocol\": \"X\"}")) {
        @Override
        public Object respond(Message message, Object request) throws Exception {
          throw new AvroRemoteException("no messages!");
        }
      };
      SocketServer server = new SocketServer(responder, new InetSocketAddress(0));
      server.start();
      System.out.println("server started on port: " + server.getPort());
      server.join();
    }
  }
  