------------------------------------------------------------------------------
--                                                                          --
--                           POLYORB COMPONENTS                             --
--                                                                          --
--             COSNOTIFYCHANNELADMIN.EVENTCHANNELFACTORY.IMPL               --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--         Copyright (C) 2003-2012, Free Software Foundation, Inc.          --
--                                                                          --
-- This is free software;  you can redistribute it  and/or modify it  under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  This software is distributed in the hope  that it will be useful, --
-- but WITHOUT ANY WARRANTY;  without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public --
-- License for  more details.                                               --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
--                  PolyORB is maintained by AdaCore                        --
--                     (email: sales@adacore.com)                           --
--                                                                          --
------------------------------------------------------------------------------

with CosNotifyChannelAdmin.EventChannel.Impl;
with CosNotifyChannelAdmin.Helper;

with PolyORB.CORBA_P.Server_Tools;
with PolyORB.Log;
with PolyORB.Tasking.Mutexes;

with CosNotifyChannelAdmin.EventChannelFactory.Skel;
pragma Warnings (Off, CosNotifyChannelAdmin.EventChannelFactory.Skel);

package body CosNotifyChannelAdmin.EventChannelFactory.Impl is

   use PortableServer;

   use IDL_SEQUENCE_CosNotifyChannelAdmin_ChannelID;

   use PolyORB.CORBA_P.Server_Tools;
   use PolyORB.Tasking.Mutexes;

   use PolyORB.Log;
   package L is new PolyORB.Log.Facility_Log ("eventchannelfactory");
   procedure O (Message : Standard.String; Level : Log_Level := Debug)
     renames L.Output;
   function C (Level : Log_Level := Debug) return Boolean
     renames L.Enabled;
   pragma Unreferenced (C); --  For conditional pragma Debug

   package EventChannels is
      new CORBA.Sequences.Unbounded (CosNotifyChannelAdmin.EventChannel.Ref);

   type Event_Channel_Factory_Record is record
      Channels : EventChannels.Sequence;
      IDSeq    : CosNotifyChannelAdmin.ChannelIDSeq;
      This     : Object_Ptr;
   end record;

   ---------------------------
   -- Ensure_Initialization --
   ---------------------------

   procedure Ensure_Initialization;
   pragma Inline (Ensure_Initialization);
   --  Ensure that the Mutexes are initialized

   T_Initialized : Boolean := False;
   Self_Mutex : Mutex_Access;

   procedure Ensure_Initialization is
   begin
      if not T_Initialized then
         Create (Self_Mutex);
         T_Initialized := True;
      end if;
   end Ensure_Initialization;

   --------------------
   -- Create_Channel --
   --------------------

   procedure Create_Channel
      (Self          : access Object;
       Initial_QoS   : CosNotification.QoSProperties;
       Initial_Admin : CosNotification.AdminProperties;
       Id            : out ChannelID;
       Returns       : out CosNotifyChannelAdmin.EventChannel.Ref)
   is
      Channel : CosNotifyChannelAdmin.EventChannel.Impl.Object_Ptr;
      My_Ref  : CosNotifyChannelAdmin.EventChannelFactory.Ref;
   begin
      pragma Debug (O ("create_channel in eventchannelfactory"));

      Ensure_Initialization;

      Enter (Self_Mutex);
      Servant_To_Reference (Servant (Self.X.This), My_Ref);
      Channel := CosNotifyChannelAdmin.EventChannel.Impl.Create
                 (My_Ref, Initial_QoS, Initial_Admin);
      Servant_To_Reference (Servant (Channel), Returns);

      EventChannels.Append (Self.X.Channels, Returns);
      Id := CosNotifyChannelAdmin.ChannelID
            (EventChannels.Length (Self.X.Channels));
      Append (Self.X.IDSeq, Id);

      Leave (Self_Mutex);

   end Create_Channel;

   ----------------------
   -- Get_All_Channels --
   ----------------------

   function Get_All_Channels
     (Self : access Object)
     return CosNotifyChannelAdmin.ChannelIDSeq
   is
      MyChannelSeq : CosNotifyChannelAdmin.ChannelIDSeq;
   begin
      pragma Debug (O ("get_all_channels from eventchannelfactory"));
      Ensure_Initialization;

      Enter (Self_Mutex);
      MyChannelSeq := Self.X.IDSeq;
      Leave (Self_Mutex);

      return MyChannelSeq;
   end Get_All_Channels;

   -----------------------
   -- Get_Event_Channel --
   -----------------------

   function Get_Event_Channel
     (Self : access Object;
      Id   : ChannelID)
     return CosNotifyChannelAdmin.EventChannel.Ref
   is
      MyChannel : CosNotifyChannelAdmin.EventChannel.Ref;
      SeqLen    : CosNotifyChannelAdmin.ChannelID;
   begin
      pragma Debug (O ("get_event_channel from eventchannelfactory"));

      Ensure_Initialization;

      Enter (Self_Mutex);
      SeqLen := CosNotifyChannelAdmin.ChannelID (Length (Self.X.IDSeq));

      if Id > SeqLen then
         CosNotifyChannelAdmin.Helper.Raise_ChannelNotFound
           ((CORBA.IDL_Exception_Members with null record));
      end if;

      MyChannel := EventChannels.Get_Element (Self.X.Channels, Integer (Id));
      Leave (Self_Mutex);

      return MyChannel;
   end Get_Event_Channel;

   ------------
   -- Create --
   ------------

   function Create
      return Object_Ptr
   is
      Factory : Object_Ptr;
      My_Ref  : CosNotifyChannelAdmin.EventChannelFactory.Ref;
   begin
      pragma Debug (O ("create eventchannelfactory"));

      Factory         := new Object;
      Factory.X       := new Event_Channel_Factory_Record;
      Factory.X.This  := Factory;
      Initiate_Servant (Servant (Factory), My_Ref);

      return Factory;
   end Create;

end CosNotifyChannelAdmin.EventChannelFactory.Impl;
