Package edu.caltech.nanodb.client

Class ExclusiveClient

  • public class ExclusiveClient
extends InteractiveClient

    This class is used for starting the NanoDB database in "exclusive mode," where only a single client interacts directly with the database system. In fact, the exclusive client embeds the NanoDBServer instance in the client object, since there is no need to interact with the server over a network socket.

    Note that it is wrong to start multiple exclusive clients against the same data directory!!! Exclusive-mode operation expects that only this server is interacting with the data files. For concurrent access from multiple clients, see the SharedServerClient class.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private static org.apache.logging.log4j.Logger logger  
      private NanoDBServer server
      The server that this exclusive client is using.

    • Constructor Summary

      Constructors 
      Constructor Description
      ExclusiveClient()  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      CommandResult handleCommand​(java.lang.String command)
      Subclasses can implement this method to handle each command entered by the user.
      static void main​(java.lang.String[] args)  
      void shutdown()
      Shut down the interactive client.
      void startup()
      Start up the interactive client.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • logger

        private static org.apache.logging.log4j.Logger logger

      • server

        private NanoDBServer server
        The server that this exclusive client is using.

    • Constructor Detail

      • ExclusiveClient

        public ExclusiveClient()

    • Method Detail

      • startup

        public void startup()
        Description copied from class: InteractiveClient
        Start up the interactive client. The specific way the client interacts with the server dictates how this startup mechanism will work.
        Specified by:
        startup in class InteractiveClient

      • handleCommand

        public CommandResult handleCommand​(java.lang.String command)
        Description copied from class: InteractiveClient
        Subclasses can implement this method to handle each command entered by the user. For example, a subclass may send the command over a socket to the server, wait for a response, then output the response to the console.
        Specified by:
        handleCommand in class InteractiveClient
        Parameters:
        command - the command to handle.
        Returns:
        the command-result from executing the command

      • shutdown

        public void shutdown()
        Description copied from class: InteractiveClient
        Shut down the interactive client. The specific way the client interacts with the server dictates how this shutdown mechanism will work.
        Specified by:
        shutdown in class InteractiveClient

      • main

        public static void main​(java.lang.String[] args)