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.cassandra.transport;
  
  import java.net.InetSocketAddress;
  import java.util.Collections;
  import java.util.Map;
  import java.util.Optional;
  
  import com.google.common.base.Joiner;
  import com.google.common.collect.ImmutableMap;
  
  import io.netty.handler.ssl.SslHandler;
  import org.apache.cassandra.auth.AuthenticatedUser;
  import org.apache.cassandra.auth.IAuthenticator;
  import org.apache.cassandra.service.ClientState;
  
  import static org.apache.cassandra.auth.IAuthenticator.AuthenticationMode.UNAUTHENTICATED;
  
  public final class ConnectedClient
  {
      public static final String ADDRESS = "address";
      public static final String USER = "user";
      public static final String VERSION = "version";
      public static final String CLIENT_OPTIONS = "clientOptions";
      public static final String DRIVER_NAME = "driverName";
      public static final String DRIVER_VERSION = "driverVersion";
      public static final String REQUESTS = "requests";
      public static final String KEYSPACE = "keyspace";
      public static final String SSL = "ssl";
      public static final String CIPHER = "cipher";
      public static final String PROTOCOL = "protocol";
      public static final String AUTHENTICATION_MODE = "authenticationMode";
      public static final String AUTHENTICATION_METADATA = "authenticationMetadata";
  
      private static final String UNDEFINED = "undefined";
  
      private final ServerConnection connection;
  
      ConnectedClient(ServerConnection connection)
      {
          this.connection = connection;
      }
  
      public ConnectionStage stage()
      {
          return connection.stage();
      }
  
      public InetSocketAddress remoteAddress()
      {
          return state().getRemoteAddress();
      }
  
      public Optional<String> username()
      {
          AuthenticatedUser user = state().getUser();
  
          return null != user
               ? Optional.of(user.getName())
               : Optional.empty();
      }
  
      public int protocolVersion()
      {
          return connection.getVersion().asInt();
      }
  
      public Optional<String> driverName()
      {
          return state().getDriverName();
      }
  
      public Optional<String> driverVersion()
      {
          return state().getDriverVersion();
      }
  
      public Optional<Map<String,String>> clientOptions()
      {
          return state().getClientOptions();
      }
  
      public long requestCount()
      {
          return connection.requests.getCount();
      }
  
      public Optional<String> keyspace()
      {
          return Optional.ofNullable(state().getRawKeyspace());
      }
  
      public boolean sslEnabled()
      {
          return null != sslHandler();
      }
  
      public Optional<String> sslCipherSuite()
      {
          SslHandler sslHandler = sslHandler();
  
          return null != sslHandler
               ? Optional.of(sslHandler.engine().getSession().getCipherSuite())
               : Optional.empty();
      }
  
      public Optional<String> sslProtocol()
      {
          SslHandler sslHandler = sslHandler();
  
          return null != sslHandler
               ? Optional.of(sslHandler.engine().getSession().getProtocol())
               : Optional.empty();
      }
  
      public Map<String, Object> authenticationMetadata()
      {
          AuthenticatedUser user = state().getUser();
  
          return null != user
                  ? user.getMetadata()
                  : Collections.emptyMap();
      }
  
      public IAuthenticator.AuthenticationMode authenticationMode()
      {
          AuthenticatedUser user = state().getUser();
  
          return null != user
                  ? user.getAuthenticationMode()
                  : UNAUTHENTICATED;
      }
  
      private ClientState state()
      {
          return connection.getClientState();
      }
  
      private SslHandler sslHandler()
      {
          return connection.channel().pipeline().get(SslHandler.class);
      }
  
      public Map<String, String> asMap()
      {
          return ImmutableMap.<String, String>builder()
                             .put(ADDRESS, remoteAddress().toString())
                             .put(USER, username().orElse(UNDEFINED))
                             .put(VERSION, String.valueOf(protocolVersion()))
                             .put(CLIENT_OPTIONS, Joiner.on(", ")
                                                        .withKeyValueSeparator("=")
                                                        .join(clientOptions().orElse(Collections.emptyMap())))
                             .put(DRIVER_NAME, driverName().orElse(UNDEFINED))
                             .put(DRIVER_VERSION, driverVersion().orElse(UNDEFINED))
                             .put(REQUESTS, String.valueOf(requestCount()))
                             .put(KEYSPACE, keyspace().orElse(""))
                             .put(SSL, Boolean.toString(sslEnabled()))
                             .put(CIPHER, sslCipherSuite().orElse(UNDEFINED))
                             .put(PROTOCOL, sslProtocol().orElse(UNDEFINED))
                             .put(AUTHENTICATION_MODE, authenticationMode().toString())
                             .put(AUTHENTICATION_METADATA, Joiner.on(", ")
                                                                 .withKeyValueSeparator("=")
                                                                 .join(authenticationMetadata()))
                             .build();
      }
  }
  