/*
 * 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.geode.admin.jmx.internal;

import org.apache.geode.admin.DistributedSystemConfig;
import org.apache.geode.admin.internal.InetAddressUtil;
import org.apache.geode.distributed.internal.DistributionConfig;
import org.apache.geode.internal.net.SocketCreator;
import org.apache.geode.internal.logging.LogService;
import org.apache.geode.internal.net.SocketCreatorFactory;

import org.apache.logging.log4j.Logger;

import java.io.IOException;
import java.net.ServerSocket;
import java.util.Properties;

/**
 * Creates <code>ServerSockets</code> for JMX adaptors.
 * <p>
 * The interface {@link mx4j.tools.adaptor.AdaptorServerSocketFactory} is implemented in order to
 * support securing of {@link mx4j.tools.adaptor.http.HttpAdaptor}.
 * <p>
 * The interface {@link java.rmi.server.RMIServerSocketFactory} is implemented to support the
 * securing of {@link javax.management.remote.JMXConnectorServer}. See
 * {@link javax.management.remote.rmi.RMIConnectorServer} for the actual subclass that is used for
 * the JMX RMI adaptor.
 * <p>
 * Complete info on JSSE, including debugging, can be found at
 * <a href="http://java.sun.com/j2se/1.4.2/docs/guide/security/jsse/JSSERefGuide.html">
 * http://java.sun.com/j2se/1.4.2/docs/guide/security/jsse/JSSERefGuide.html</a>
 *
 * @since GemFire 3.5 (old name was SSLAdaptorServerSocketFactory)
 */
public class MX4JServerSocketFactory implements mx4j.tools.adaptor.AdaptorServerSocketFactory,
    java.rmi.server.RMIServerSocketFactory {

  private static final Logger logger = LogService.getLogger();

  private static final int DEFAULT_BACKLOG = 50;

  private final SocketCreator socketCreator;
  private String bindAddress = DistributedSystemConfig.DEFAULT_BIND_ADDRESS;
  private int backlog = DEFAULT_BACKLOG;

  /**
   * Constructs new instance of MX4JServerSocketFactory.
   * 
   * @param useSSL true if ssl is to be enabled
   * @param needClientAuth true if client authentication is required
   * @param protocols space-delimited list of ssl protocols to use
   * @param ciphers space-delimited list of ssl ciphers to use
   * @param gfsecurityProps vendor properties passed in through gfsecurity.properties
   */
  public MX4JServerSocketFactory(boolean useSSL, boolean needClientAuth, String protocols,
      String ciphers, Properties gfsecurityProps) {
    if (protocols == null || protocols.length() == 0) {
      protocols = DistributionConfig.DEFAULT_SSL_PROTOCOLS;
    }
    if (ciphers == null || ciphers.length() == 0) {
      ciphers = DistributionConfig.DEFAULT_SSL_CIPHERS;
    }
    this.socketCreator = SocketCreatorFactory.createNonDefaultInstance(useSSL, needClientAuth,
        protocols, ciphers, gfsecurityProps);
  }

  /**
   * Constructs new instance of MX4JServerSocketFactory.
   * 
   * @param useSSL true if ssl is to be enabled
   * @param needClientAuth true if client authentication is required
   * @param protocols space-delimited list of ssl protocols to use
   * @param ciphers space-delimited list of ssl ciphers to use
   * @param bindAddress host or address to bind to (bind-address)
   * @param backlog how many connections are queued
   * @param gfsecurityProps vendor properties passed in through gfsecurity.properties
   */
  public MX4JServerSocketFactory(boolean useSSL, boolean needClientAuth, String protocols,
      String ciphers, String bindAddress, // optional for RMI impl
      int backlog, // optional for RMI impl
      Properties gfsecurityProps) {
    this(useSSL, needClientAuth, protocols, ciphers, gfsecurityProps);
    this.bindAddress = bindAddress;
    this.backlog = backlog;
  }

  // -------------------------------------------------------------------------
  // mx4j.tools.adaptor.AdaptorServerSocketFactory impl...
  // -------------------------------------------------------------------------

  public ServerSocket createServerSocket(int port, int backlog, String bindAddress)
      throws IOException {
    if ("".equals(bindAddress)) {
      return socketCreator.createServerSocket(port, backlog);

    } else {
      return socketCreator.createServerSocket(port, backlog,
          InetAddressUtil.toInetAddress(bindAddress));
    }
  }

  // -------------------------------------------------------------------------
  // java.rmi.server.RMIServerSocketFactory impl...
  // -------------------------------------------------------------------------

  public ServerSocket createServerSocket(int port) throws IOException {
    ServerSocket sock = null;
    if ("".equals(bindAddress)) {
      sock = socketCreator.createServerSocket(port, this.backlog);
    } else {
      sock = socketCreator.createServerSocket(port, this.backlog,
          InetAddressUtil.toInetAddress(this.bindAddress));
    }

    if (logger.isDebugEnabled()) {
      logger.debug(
          "MX4JServerSocketFactory RMIServerSocketFactory, INetAddress {}, LocalPort {}, LocalSocketAddress {}",
          sock.getInetAddress(), sock.getLocalPort(), sock.getLocalSocketAddress());
    }
    return sock;
  }

}