// -*- IDL -*-

/**
 */

#ifndef TAO_IMRCLIENT_IMPLREPO_PIDL
#define TAO_IMRCLIENT_IMPLREPO_PIDL

#include "ServerObject.idl"
#include "tao/StringSeq.pidl"

module ImplementationRepository
{
  // = Exceptions

  /// Object already bound in the Implementation Repository
  exception AlreadyRegistered {};

  /// The server could not be restarted.
  exception CannotActivate
  {
    string reason;
  };

  /// Object not found in the Implementation Repository
  exception NotFound {};

  /// Operation cannot be completed due to Activator version
  /// or other incompatibility
  exception CannotComplete
  {
    string reason;
  };

  /// One environment variable/value pair.
  struct EnvironmentVariable
  {
    string name;
    string value;
  };

  /// Complete Environment.
  typedef sequence<EnvironmentVariable> EnvironmentList;

  /// The type of Activation
  enum ActivationMode {NORMAL, MANUAL, PER_CLIENT, AUTO_START};

  /// Options used to start up the server.
  struct StartupOptions
  {
    /// Startup command (program name and arguments).
    string command_line;

    /// Environment Variables.
    EnvironmentList environment;

    /// Working directory.
    string working_directory;

    /// Activation Mode
    ActivationMode activation;

    /// Name of the activator
    string activator;

    /// Number of retries allowed
    long start_limit;
  };

  /// Status of server
  enum ServerActiveStatus
  {
    /// No attempt as been made to determine status.
    ACTIVE_MAYBE,

    /// Server has been succesfully pinged within ping interval.
    ACTIVE_YES,

    /// Server was not able to be pinged within ping interval.
    ACTIVE_NO
  };

  struct ServerInformation
  {
    /// Server name.
    string server;

    /// How to start up the server.
    StartupOptions startup;

    /// This is used in places that require a partial IOR with
    /// just the ObjectKey missing.
    string partial_ior;

    ServerActiveStatus activeStatus;
  };

  typedef sequence <ServerInformation> ServerInformationList;

  /**
    * @brief The Server Information Iterator Interface
    *
    * Interface for iterating over servers returned with
    * Administration::list ().
    */
  interface ServerInformationIterator
  {
    /// This operation returns at most the requested number of
    /// servers.
    /// If how_many == 0, then returns all servers
    boolean next_n (in unsigned long how_many,
                    out ServerInformationList servers);

    /// This operation destroys the iterator.
    void destroy ();
  };

  /**
    * @brief The Implementation Repository Administration Interface
    *
    * This interface exports all the administration functionality of
    * the Implementation Repository.
    */
  interface Administration
  {
    /// Activate server that is named @a server.
    ///
    /// The @c NotFound exception is raised when @a server is not found
    /// in the Implementation Repository.  The @c CannotActivate exception
    /// is raised when @a server is found in the Repository but could not be
    /// activated.
    void activate_server (in string server)
      raises (NotFound, CannotActivate);

    /// Add/Update the the @a server.
    /// The @c NotFound exception is raised when the activator specified
    /// in the options is not registered.
    void add_or_update_server (in string server, in StartupOptions options)
      raises(NotFound);

    /// Remove @a server from the Implementation Repository.
    ///
    /// The @c NotFound exception is raised when @a server is not found
    /// in the Implementation Repository.
    void remove_server (in string server)
      raises (NotFound);

    /// Tries to shutdown the server, first gracefully, then ungracefully.
    ///
    /// The @c NotFound exception is raised when @a server is not found
    /// in the Implementation Repository.
    void shutdown_server (in string server)
      raises (NotFound);

    /// Used to notify the Implementation Repository that @a server is alive
    /// and well at @a partial_ior.
    ///
    /// The @c NotFound exception is raised when @a server is not found
    /// in the Implementation Repository.
    void server_is_running (in string server,
                            in string partial_ior,
                            in ServerObject server_object)
      raises (NotFound);

    /// Used to tell the Implementation Repository that @a server is shutting
    /// down.
    ///
    /// The @c NotFound exception is raised when @a server is not found
    /// in the Implementation Repository.

    void server_is_shutting_down (in string server)
      raises (NotFound);

    /// Returns the startup information for a given @a server.
    void find (in string server, out ServerInformation info);

    /// Returns at most @a how_many servers in @a server_list.  If there
    /// are additional servers, they can be received through the
    /// @a server_iterator.  If there are no more servers, then
    /// @a server_iterator is null.
    /// If @a how_many == 0, then returns all servers.
    /// If @a determine_active_status is true then
    /// set ServerInformation::active_status attribute by determining
    /// if the server is alive.
    void list (in unsigned long how_many,
               in boolean determine_active_status,
               out ServerInformationList server_list,
               out ServerInformationIterator server_iterator);

    /// Shutdown the ImR, optionally shutting down registered
    /// activators and servers first.
    oneway void shutdown(in boolean activators, in boolean servers);
  };

  /**
    * @brief The Extended Implementation Repository Administration Interface
    *
    * This interface adds operations in a way that maintains compatibility
    */
  interface AdministrationExt : Administration
  {
    /// Identify a set of peer poas that exist in the same process.
    void link_servers (in string server, in CORBA::StringSeq peers)
      raises(NotFound, CannotComplete);

    /// Have the appropriate activator send a signal to the named server process
    void kill_server (in string server, in short signum)
      raises(NotFound, CannotComplete);

    /// Combine the action of shutting down a running server instance if any via
    /// a shutdown command if signum is 0, or via kill if signum is nonzero
    void force_remove_server (in string server, in short signum)
      raises(NotFound, CannotComplete);
  };
};

#endif /* TAO_IMRCLIENT_IMPLREPO_PIDL */
