content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio;
  
  import alluxio.exception.status.UnavailableException;
  
  import java.io.Closeable;
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import java.net.SocketAddress;
  
  /**
   * Interface for a client in the Alluxio system.
   */
  public interface Client extends Closeable {
  
    /**
     * Connects with the remote.
     */
    void connect() throws IOException;
  
    /**
     * Closes the connection with the Alluxio remote and does the necessary cleanup. It should be used
     * if the client has not connected with the remote for a while, for example.
     */
    void disconnect();
  
    /**
     * @return the {@link SocketAddress} of the remote
     * @throws UnavailableException if the primary address cannot be determined
     */
    SocketAddress getRemoteSockAddress() throws UnavailableException;
  
    /**
     * @return the host name of the remote
     * @throws UnavailableException if the primary address cannot be determined
     */
    String getRemoteHostName() throws UnavailableException;
  
    /**
     * @return the {@link InetSocketAddress} of the configuration remote
     * @throws UnavailableException if the primary address cannot be determined
     */
    InetSocketAddress getConfAddress() throws UnavailableException;
  
    /**
     * Returns the connected status of the client.
     *
     * @return true if this client is connected to the remote
     */
    boolean isConnected();
  
    /**
     * @return whether the client is closed
     */
    boolean isClosed();
  }
  