/*
    * junixsocket
    *
    * Copyright 2009-2024 Christian Kohlschütter
    *
    * 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.newsclub.net.unix.demo.rmi;
  
  import java.io.IOException;
  import java.rmi.NotBoundException;
  import java.rmi.registry.Registry;
  import java.rmi.server.RemoteObject;
  
  import org.newsclub.net.unix.demo.rmi.services.HelloWorld;
  import org.newsclub.net.unix.demo.rmi.services.World;
  import org.newsclub.net.unix.rmi.AFUNIXNaming;
  import org.newsclub.net.unix.rmi.RemotePeerInfo;
  
  /**
   * A simple RMI client. Locates the RMI registry via AF_UNIX sockets and calls
   * {@link HelloWorld#hello()}.
   *
   * @author Christian Kohlschütter
   */
  @SuppressWarnings("CatchAndPrintStackTrace" /* errorprone */)
  public final class SimpleRMIClientActingAsServer {
    public static void main(String[] args) throws IOException, NotBoundException {
      AFUNIXNaming naming = AFUNIXNaming.getInstance();
  
      System.out.println("Locating registry...");
      final Registry registry = naming.getRegistry();
      System.out.println(registry);
      System.out.println();
      HelloWorld obj = (HelloWorld) registry.lookup("helloWorld");
      System.out.println("HelloWorld instance:");
      System.out.println("    " + obj);
      System.out.println("    " + RemotePeerInfo.remotePeerCredentials(obj));
      System.out.println();
  
      World world = new WorldImpl("everybody");
      naming.exportAndRebind("world", world);
      System.out.println("Exporting our own World instance:");
      System.out.println("    " + RemoteObject.toStub(world));
      System.out.println("    " + RemotePeerInfo.remotePeerCredentials(world));
      System.out.println();
  
      System.out.println("Calling HelloWorld...");
      System.out.println(obj.hello() + " " + obj.world() + "!");
  
      /*
       * Uncommenting the line below keeps this instance running.
       *
       * Try it and run SimpleRMIClient to see the difference.
       */
      naming.unexportAndUnbind("world", world);
  
      /*
       * Also try to remotely shut down the registry.
       *
       * This will not succeed if the server set {@code naming.setRemoteShutdownAllowed(false)}. See
       * {@link SimpleRMIServer}
       */
      // naming.shutdownRegistry();
    }
  }