The R13B03 release.OTP_R13B03

1 files changed, 1415 insertions, 0 deletions

diff --git a/lib/cosEventDomain/src/CosEventDomainAdmin_EventDomain_impl.erl b/lib/cosEventDomain/src/CosEventDomainAdmin_EventDomain_impl.erl
new file mode 100644
index 0000000000..0b73100540
--- /dev/null
+++ b/lib/cosEventDomain/src/CosEventDomainAdmin_EventDomain_impl.erl
@@ -0,0 +1,1415 @@
+%%--------------------------------------------------------------------
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2001-2009. All Rights Reserved.
+%% 
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%% 
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%% 
+%% %CopyrightEnd%
+%%
+%%
+%%----------------------------------------------------------------------
+%% File        : CosEventDomainAdmin_EventDomain_impl.erl
+%% Description : 
+%%
+%%----------------------------------------------------------------------
+-module('CosEventDomainAdmin_EventDomain_impl').
+
+%%----------------------------------------------------------------------
+%% Include files
+%%----------------------------------------------------------------------
+-include_lib("orber/include/corba.hrl").
+-include_lib("orber/include/ifr_types.hrl").
+-include_lib("cosNotification/include/CosNotifyChannelAdmin.hrl").
+-include_lib("cosNotification/include/CosNotification.hrl").
+
+-include("cosEventDomainApp.hrl").
+-include("CosEventDomainAdmin.hrl").
+
+%%----------------------------------------------------------------------
+%% External exports
+%%----------------------------------------------------------------------
+-export([init/1,
+	 terminate/2,
+	 code_change/3,
+	 handle_info/2]).
+
+%%------------------ CosEventDomainAdmin::EventDomain ------------------
+-export([add_channel/3, 
+	 get_all_channels/2, 
+	 get_channel/3,
+	 remove_channel/3,
+	 add_connection/3,
+	 get_all_connections/2,
+	 get_connection/3,
+	 remove_connection/3,
+	 get_offer_channels/3,
+	 get_subscription_channels/3,
+	 destroy/2,
+	 get_cycles/2,
+	 get_diamonds/2,
+	 set_default_consumer_channel/3,
+	 set_default_supplier_channel/3,
+	 connect_push_consumer/3,
+	 connect_pull_consumer/3,
+	 connect_push_supplier/3,
+	 connect_pull_supplier/3,
+	 connect_structured_push_consumer/3,
+	 connect_structured_pull_consumer/3,
+	 connect_structured_push_supplier/3,
+	 connect_structured_pull_supplier/3,
+	 connect_sequence_push_consumer/3,
+	 connect_sequence_pull_consumer/3,
+	 connect_sequence_push_supplier/3,
+	 connect_sequence_pull_supplier/3,
+	 connect_push_consumer_with_id/4,
+	 connect_pull_consumer_with_id/4,
+	 connect_push_supplier_with_id/4,
+	 connect_pull_supplier_with_id/4,
+	 connect_structured_push_consumer_with_id/4,
+	 connect_structured_pull_consumer_with_id/4,
+	 connect_structured_push_supplier_with_id/4,
+	 connect_structured_pull_supplier_with_id/4,
+	 connect_sequence_push_consumer_with_id/4,
+	 connect_sequence_pull_consumer_with_id/4,
+	 connect_sequence_push_supplier_with_id/4,
+	 connect_sequence_pull_supplier_with_id/4]).
+
+%%------------------ CosNotification::QoSAdmin -------------------------
+-export([get_qos/2, 
+	 set_qos/3, 
+	 validate_qos/3]).
+
+%%------------------ CosNotification::AdminPropertiesAdmin -------------
+-export([get_admin/2, 
+	 set_admin/3]).
+
+
+
+%%----------------------------------------------------------------------
+%% Internal exports
+%%----------------------------------------------------------------------
+-export([]).
+
+%%----------------------------------------------------------------------
+%% Records
+%%----------------------------------------------------------------------
+-record(state, {parent_pid, id, graph, ch_counter=-1, 
+		co_counter=-1, def_supplier, def_consumer, diamonds, cyclic}).
+
+-record(connection, {supplier, consumer, data}).
+
+%%----------------------------------------------------------------------
+%% Macros
+%%----------------------------------------------------------------------
+
+%%======================================================================
+%% External functions
+%%======================================================================
+%%----------------------------------------------------------------------
+%% Function   : init/1
+%% Returns    : {ok, State}          |
+%%              {ok, State, Timeout} |
+%%              ignore               |
+%%              {stop, Reason}
+%% Description: Initiates the server
+%%----------------------------------------------------------------------
+init([ParentPid, MyId, QoS, _Admin]) ->
+    process_flag(trap_exit, true),
+    Diamonds = case lists:keysearch(?DiamondDetection, 1, QoS) of
+		   false ->
+		       ?ForbidDiamonds;
+		   {value, {_, Value}} ->
+		       Value
+	       end,
+    case lists:keysearch(?CycleDetection, 1, QoS) of
+	{value, {_, ?AuthorizeCycles}} ->
+	    {ok, #state{parent_pid = ParentPid, id = MyId, 
+			graph = digraph:new([private]),
+			diamonds = Diamonds, cyclic = ?AuthorizeCycles}};
+	_ ->
+	    {ok, #state{parent_pid = ParentPid, id = MyId, 
+			graph = digraph:new([acyclic, private]),
+			diamonds = Diamonds, cyclic = ?ForbidCycles}}
+    end.
+
+%%----------------------------------------------------------------------
+%% Function   : terminate/2
+%% Returns    : any (ignored by gen_server)
+%% Description: Shutdown the server
+%%----------------------------------------------------------------------
+terminate(_Reason, #state{graph = DG} = _State) ->
+    Connections = digraph:edges(DG),
+    close_connections(DG, Connections),
+    digraph:delete(DG),
+    ok.
+
+%%----------------------------------------------------------------------
+%% Function   : code_change/3
+%% Returns    : {ok, NewState}
+%% Description: Convert process state when code is changed
+%%----------------------------------------------------------------------
+code_change(_OldVsn, State, _Extra) ->
+    {ok, State}.
+
+%%----------------------------------------------------------------------
+%% Function   : handle_info/2
+%% Returns    : {noreply, State}   |
+%%              {stop, Reason, State}  
+%% Description: Handle, for example, exit signals.
+%%----------------------------------------------------------------------
+handle_info({'EXIT', Pid, Reason}, #state{parent_pid = Pid} = State) ->
+    {stop, Reason, State};
+handle_info(_Info, State) ->
+    {noreply, State}.
+
+%%----------------------------------------------------------------------
+%%------------------ CosEventDomainAdmin::EventDomain ------------------
+%%---------------------------------------------------------------------%
+%% Function   : add_channel
+%% Arguments  : Channel - CosNotifyChannelAdmin::EventChannel
+%% Returns    : MemberId - long()
+%% Description: 
+%%----------------------------------------------------------------------
+add_channel(_OE_This, #state{ch_counter=C, graph = DG} = State, Channel) ->
+    type_check(Channel, 'CosNotifyChannelAdmin_EventChannel'),
+    Id = cosEventDomainApp:create_id(C),
+    digraph:add_vertex(DG, Id, Channel),
+    {reply, Id, State#state{ch_counter=Id}}.
+
+%%---------------------------------------------------------------------%
+%% Function   : get_all_channels
+%% Arguments  : -
+%% Returns    : CosEventDomainAdmin::MemberIDSeq ([long()])
+%% Description: 
+%%----------------------------------------------------------------------
+get_all_channels(_OE_This, #state{graph = DG} = State) ->
+    {reply, digraph:vertices(DG), State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : get_channel
+%% Arguments  : Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::EventChannel |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}}
+%% Description: 
+%%----------------------------------------------------------------------
+get_channel(_OE_This, #state{graph = DG} = State, Id) ->
+    {reply, lookup_channel(DG, Id), State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : remove_channel
+%% Arguments  : Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : ok |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}}
+%% Description: 
+%%----------------------------------------------------------------------
+remove_channel(_OE_This, #state{graph = DG} = State, Id) ->
+    lookup_channel(DG, Id),
+    close_connections(DG, digraph:edges(DG, Id)),
+    digraph:del_vertex(DG, Id),
+    {reply, ok, State}.
+	    
+%%---------------------------------------------------------------------%
+%% Function   : add_connection
+%% Arguments  : Connection - CosEventDomainAdmin::Connection
+%% Returns    : ConnectionID |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_TypeError'{}} |
+%%              {'EXCEPTION', #'CosEventDomainAdmin_AlreadyExists'{}} |
+%%              {'EXCEPTION', #'CosEventDomainAdmin_CycleCreationForbidden'{cyc}} |
+%%              {'EXCEPTION', #'CosEventDomainAdmin_DiamondCreationForbidden'{diam}}
+%% Description: 
+%%----------------------------------------------------------------------
+add_connection(_OE_This, #state{graph = DG, co_counter = C} = State, 
+	       Connection) when is_record(Connection, 
+					  'CosEventDomainAdmin_Connection') ->
+    SId = Connection#'CosEventDomainAdmin_Connection'.supplier_id,
+    SChannel = lookup_channel(DG, SId),
+    CId = Connection#'CosEventDomainAdmin_Connection'.consumer_id,
+    CChannel = lookup_channel(DG, CId),
+    case lists:member(CId, digraph:out_neighbours(DG, SId)) of
+	false ->
+	    Id = cosEventDomainApp:create_id(C),
+	    %% Try to insert the new connection before we actually setup a connection.
+	    %% Note that #connection is NOT complete, hence, we must update it later.
+	    case digraph:add_edge(DG, Id, SId, CId, #connection{data=Connection}) of
+		{error, {bad_edge, Path}} ->
+		    corba:raise(#'CosEventDomainAdmin_CycleCreationForbidden'{cyc=Path});
+		Id when State#state.diamonds == ?AuthorizeDiamonds ->
+		    case catch setup_connection(Connection, SChannel, CChannel) of
+			{ok, SProxy, CProxy} ->
+			    %% Now we can update the connection with complete data.
+			    digraph:add_edge(DG, Id, SId, CId, #connection{supplier=SProxy,
+									   consumer=CProxy,
+									   data=Connection}),
+			    {reply, Id, State#state{co_counter = Id}};
+			{'EXCEPTION', E} ->
+			    digraph:del_edge(DG, Id),
+			    corba:raise(E);
+			What ->
+			    digraph:del_edge(DG, Id),
+			    orber:dbg("[~p] CosEventDomainAdmin_EventDomain:"
+				      "add_connection(~p);~nFailed setting up"
+				      " connection due to: ~p", 
+				      [?LINE, Connection, What], ?DEBUG_LEVEL),
+			    corba:raise(#'INTERNAL'{completion_status=?COMPLETED_MAYBE})
+		    end;
+		Id ->
+		    case get_diamonds_helper(State, false, SId) of
+			[] ->
+			    case catch setup_connection(Connection, SChannel, CChannel) of
+				{ok, SProxy, CProxy} ->
+				    %% Now we can update the connection with complete data.
+				    digraph:add_edge(DG, Id, SId, CId, #connection{supplier=SProxy,
+										   consumer=CProxy,
+										   data=Connection}),
+				    {reply, Id, State#state{co_counter = Id}};
+				{'EXCEPTION', E} ->
+				    digraph:del_edge(DG, Id),
+				    corba:raise(E);
+				What ->
+				    digraph:del_edge(DG, Id),
+				    orber:dbg("[~p] CosEventDomainAdmin_EventDomain:"
+					      "add_connection(~p);~nFailed setting"
+					      " up connection due to: ~p", 
+					      [?LINE, Connection, What], 
+					      ?DEBUG_LEVEL),
+				    corba:raise(#'INTERNAL'{completion_status=?COMPLETED_MAYBE})
+			    end;
+			Diamond ->
+			    %% Since no diamonds should exist the returned list can
+			    %% only describe the diamond we just created.
+			    digraph:del_edge(DG, Id),
+			    corba:raise(#'CosEventDomainAdmin_DiamondCreationForbidden'
+					{diam=Diamond})
+		    end
+	    end;
+	true ->
+	    corba:raise(#'CosEventDomainAdmin_AlreadyExists'{})
+    end.
+
+
+%%---------------------------------------------------------------------%
+%% Function   : get_all_connections
+%% Arguments  : -
+%% Returns    : CosEventDomainAdmin::ConnectionIDSeq - [long()]
+%% Description: 
+%%----------------------------------------------------------------------
+get_all_connections(_OE_This, #state{graph = DG} = State) ->
+    {reply, digraph:edges(DG), State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : get_connection
+%% Arguments  : Id - CosEventDomainAdmin::ConnectionID (long())
+%% Returns    : CosEventDomainAdmin::Connection |
+%%              {'EXCEPTION', #'CosEventDomainAdmin_ConnectionNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+get_connection(_OE_This, #state{graph = DG} = State, Id) ->
+    {reply, lookup_connection_data(DG, Id), State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : remove_connection
+%% Arguments  : Id - CosEventDomainAdmin::ConnectionID (long())
+%% Returns    : ok |
+%%              {'EXCEPTION', #'CosEventDomainAdmin_ConnectionNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+remove_connection(_OE_This, #state{graph = DG} = State, Id) ->
+    #connection{supplier=S, consumer=C, data=Connection} = 
+	lookup_connection(DG, Id),
+    close_connection(Connection, S, C),
+    digraph:del_edge(DG, Id),
+    {reply, ok, State}.
+
+
+%%---------------------------------------------------------------------%
+%% Function   : get_offer_channels
+%% Arguments  : Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::ChannelIDSeq |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+get_offer_channels(_OE_This, #state{graph = DG, cyclic = Cyclic} = State, Id) ->
+    lookup_channel(DG, Id),
+    case digraph:vertex(DG, Id) of
+	{Id, _Channel} when Cyclic == ?ForbidCycles ->
+	    {reply, digraph_utils:reaching_neighbours([Id], DG), State};
+	{Id, _Channel} ->
+	    %% If cyclic graphs is allowed 'Id' will appear in the returned list.
+	    %% Hence, we must delete it.
+	    {reply,lists:delete(Id, digraph_utils:reaching_neighbours([Id], DG)), 
+	     State};
+	false ->
+	    corba:raise(#'CosNotifyChannelAdmin_ChannelNotFound'{})
+    end.
+
+%%---------------------------------------------------------------------%
+%% Function   : get_subscription_channels
+%% Arguments  : Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::ChannelIDSeq |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+get_subscription_channels(_OE_This, #state{graph = DG, cyclic = Cyclic} = State, Id) ->
+    lookup_channel(DG, Id),
+    case digraph:vertex(DG, Id) of
+	{Id, _Channel} when Cyclic == ?ForbidCycles ->
+	    {reply, digraph_utils:reachable_neighbours([Id], DG), State};
+	{Id, _Channel} ->
+	    %% If cyclic graphs is allowed 'Id' will appear in the returned list.
+	    %% Hence, we must delete it.
+	    {reply, lists:delete(Id, digraph_utils:reachable_neighbours([Id], DG)), 
+	     State};
+	false ->
+	    corba:raise(#'CosNotifyChannelAdmin_ChannelNotFound'{})
+    end.
+
+%%---------------------------------------------------------------------%
+%% Function   : destroy
+%% Arguments  : -
+%% Returns    : ok
+%% Description: 
+%%----------------------------------------------------------------------
+destroy(_OE_This, #state{graph = _DG} = State) ->
+    {stop, normal, ok, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : get_cycles
+%% Arguments  : -
+%% Returns    : CosEventDomainAdmin::CycleSeq
+%% Description: 
+%%----------------------------------------------------------------------
+get_cycles(_OE_This, #state{cyclic = ?ForbidCycles} = State) ->
+    {reply, [], State};
+get_cycles(_OE_This, #state{graph = DG} = State) ->
+    {reply, digraph_utils:cyclic_strong_components(DG), State}.
+
+%%----------------------------------------------------------------------
+%% Function   : get_diamonds
+%% Arguments  : -
+%% Returns    : CosEventDomainAdmin::DiamondSeq
+%% Description: 
+%%----------------------------------------------------------------------
+get_diamonds(_OE_This, #state{diamonds = ?ForbidDiamonds} = State) ->
+    {reply, [], State};
+get_diamonds(_OE_This, State) ->
+    {reply, get_diamonds_helper(State, true), State}.
+
+get_diamonds_helper(#state{graph = DG} = _State, FindAll) ->
+     case find_candidates(DG) of
+	{[], _, _} ->
+	    [];
+	{_, [], _} ->
+	    [];
+	{COut, CIn, Max} ->
+	    %% In this case we cannot tell if a diamond exists. Got to
+	    %% check the paths between the candidates.
+	    evaluate_candidates(DG, COut, CIn, [], Max, FindAll)
+    end.
+
+get_diamonds_helper(#state{graph = DG} = _State, FindAll, Vertex) ->
+    case find_candidates(DG, Vertex) of
+	{[], _, _} ->
+	    [];
+	{_, [], _} ->
+	    [];
+	{COut, CIn, Max} ->
+	    %% In this case we cannot tell if a diamond exists. Got to
+	    %% check the paths between the candidates.
+	    evaluate_candidates(DG, COut, CIn, [], Max, FindAll)
+    end.
+
+%%---------------------------------------------------------------------%
+%% Function   : set_default_consumer_channel
+%% Arguments  : Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : ok |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+set_default_consumer_channel(_OE_This, #state{graph = DG} = State, Id) ->
+    lookup_channel(DG, Id),
+    {reply, ok, State#state{def_consumer=Id}}.
+
+%%---------------------------------------------------------------------%
+%% Function   : set_default_supplier_channel
+%% Arguments  : Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : ok |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+set_default_supplier_channel(_OE_This, #state{graph = DG} = State, Id) ->
+    lookup_channel(DG, Id),
+    {reply, ok, State#state{def_supplier=Id}}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_push_consumer
+%% Arguments  : PC - CosEventComm::PushConsumer
+%% Returns    : CosNotifyChannelAdmin::ProxyPushSupplier |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_push_consumer(_OE_This, #state{def_supplier = Ch} = State, PC) ->
+    type_check(PC, 'CosEventComm_PushConsumer'),
+    Proxy = connect_a_push_consumer(Ch, PC, 'ANY_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_pull_consumer
+%% Arguments  : PC - CosEventComm::PullConsumer
+%% Returns    : CosNotifyChannelAdmin::ProxyPullSupplier |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_pull_consumer(_OE_This, #state{def_consumer = Ch} = State, PC) ->
+    Proxy = connect_a_pull_consumer(Ch, PC, 'ANY_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_push_supplier
+%% Arguments  : PS - CosEventComm::PushSupplier
+%% Returns    : CosNotifyChannelAdmin::ProxyPushConsumer |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_push_supplier(_OE_This, #state{def_supplier = Ch} = State, PS) ->
+    Proxy = connect_a_push_supplier(Ch, PS, 'ANY_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_pull_supplier
+%% Arguments  : PS - CosEventComm::PullSupplier
+%% Returns    : CosNotifyChannelAdmin::ProxyPullConsumer
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_pull_supplier(_OE_This, #state{def_consumer = Ch} = State, PS) ->
+    type_check(PS, 'CosEventComm_PullSupplier'),
+    Proxy = connect_a_pull_supplier(Ch, PS, 'ANY_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_structured_push_consumer
+%% Arguments  : PC - CosNotifyComm::StructuredPushConsumer
+%% Returns    : CosNotifyChannelAdmin::StructuredProxyPushSupplier |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_structured_push_consumer(_OE_This, #state{def_supplier = Ch} = State, PC) ->
+    type_check(PC, 'CosNotifyComm_StructuredPushConsumer'),
+    Proxy = connect_a_push_consumer(Ch, PC, 'STRUCTURED_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_structured_pull_consumer
+%% Arguments  : PC - CosNotifyComm::StructuredPullConsumer
+%% Returns    : CosNotifyChannelAdmin::StructuredProxyPullSupplier |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_structured_pull_consumer(_OE_This, #state{def_supplier = Ch} = State, PC) ->
+    Proxy = connect_a_pull_consumer(Ch, PC, 'STRUCTURED_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_structured_push_supplier
+%% Arguments  : PS - CosNotifyComm::StructuredPushSupplier
+%% Returns    : CosNotifyChannelAdmin::StructuredProxyPushConsumer |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_structured_push_supplier(_OE_This, #state{def_consumer = Ch} = State, PS) ->
+    Proxy = connect_a_push_supplier(Ch, PS, 'STRUCTURED_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_structured_pull_supplier
+%% Arguments  : PS - CosNotifyComm::StructuredPullSupplier
+%% Returns    : CosNotifyChannelAdmin::StructuredProxyPullConsumer |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_structured_pull_supplier(_OE_This, #state{def_consumer = Ch} = State, PS) ->
+    type_check(PS, 'CosNotifyComm_StructuredPullSupplier'),
+    Proxy = connect_a_pull_supplier(Ch, PS, 'STRUCTURED_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_sequence_push_consumer
+%% Arguments  : PC - CosNotifyComm::SequencePushConsumer
+%% Returns    : CosNotifyChannelAdmin::SequenceProxyPushSupplier |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_sequence_push_consumer(_OE_This, #state{def_supplier = Ch} = State, PC) ->
+    type_check(PC, 'CosNotifyComm_SequencePushConsumer'),
+    Proxy = connect_a_push_consumer(Ch, PC, 'SEQUENCE_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_sequence_pull_consumer
+%% Arguments  : PC - CosNotifyComm::SequencePullConsumer
+%% Returns    : CosNotifyChannelAdmin::SequenceProxyPullSupplier |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_sequence_pull_consumer(_OE_This, #state{def_supplier = Ch} = State, PC) ->
+    Proxy = connect_a_pull_consumer(Ch, PC, 'SEQUENCE_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_sequence_push_supplier
+%% Arguments  : PS - CosNotifyComm::SequencePushSupplier
+%% Returns    : CosNotifyChannelAdmin::SequenceProxyPushConsumer |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_sequence_push_supplier(_OE_This, #state{def_consumer = Ch} = State, PS) ->
+    Proxy = connect_a_push_supplier(Ch, PS, 'SEQUENCE_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_sequence_pull_supplier
+%% Arguments  : PS - CosNotifyComm::SequencePullSupplier
+%% Returns    : CosNotifyChannelAdmin::SequenceProxyPullConsumer |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_sequence_pull_supplier(_OE_This, #state{def_consumer = Ch} = State, PS) ->
+    type_check(PS, 'CosNotifyComm_SequencePullSupplier'),
+    Proxy = connect_a_pull_supplier(Ch, PS, 'SEQUENCE_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_push_consumer_with_id
+%% Arguments  : PC - CosEventComm::PushConsumer
+%%              Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::ProxyPushSupplier |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_push_consumer_with_id(_OE_This, #state{graph = DG} = State, PC, Id) ->
+    type_check(PC, 'CosEventComm_PushConsumer'),
+    Channel = lookup_channel(DG, Id),
+    Proxy = connect_a_push_consumer(Channel, PC, 'ANY_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_pull_consumer_with_id
+%% Arguments  : PC - CosEventComm::PullConsumer
+%%              Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::ProxyPullSupplier |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_pull_consumer_with_id(_OE_This, #state{graph = DG} = State, PC, Id) ->
+    Channel = lookup_channel(DG, Id),
+    Proxy = connect_a_pull_consumer(Channel, PC, 'ANY_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_push_supplier_with_id
+%% Arguments  : PS - CosEventComm::PushSupplier
+%%              Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::ProxyPushConsumer |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_push_supplier_with_id(_OE_This, #state{graph = DG} = State, PS, Id) ->
+    Channel = lookup_channel(DG, Id),
+    Proxy = connect_a_push_supplier(Channel, PS, 'ANY_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_pull_supplier_with_id
+%% Arguments  : PS - CosEventComm::PullSupplier
+%%              Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    :  CosNotifyChannelAdmin::ProxyPullConsumer |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_pull_supplier_with_id(_OE_This, #state{graph = DG} = State, PS, Id) ->
+    type_check(PS, 'CosEventComm_PullSupplier'),
+    Channel = lookup_channel(DG, Id),
+    Proxy = connect_a_pull_supplier(Channel, PS, 'ANY_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_structured_push_consumer_with_id
+%% Arguments  : PC - CosNotifyComm::StructuredPushConsumer
+%%              Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::StructuredProxyPushSupplier |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_structured_push_consumer_with_id(_OE_This, #state{graph = DG} = State, PC, Id) ->
+    type_check(PC, 'CosNotifyComm_StructuredPushConsumer'),
+    Channel = lookup_channel(DG, Id),
+    Proxy = connect_a_push_consumer(Channel, PC, 'STRUCTURED_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_structured_pull_consumer_with_id
+%% Arguments  : PC - CosNotifyComm::StructuredPullConsumer
+%%              Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::StructuredProxyPullSupplier |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_structured_pull_consumer_with_id(_OE_This, #state{graph = DG} = State, PC, Id) ->
+    Channel = lookup_channel(DG, Id),
+    Proxy = connect_a_pull_consumer(Channel, PC, 'STRUCTURED_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_structured_push_supplier_with_id
+%% Arguments  : PS - CosNotifyComm::StructuredPushSupplier
+%%              Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::StructuredProxyPushConsumer |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_structured_push_supplier_with_id(_OE_This, #state{graph = DG} = State, PS, Id) ->
+    Channel = lookup_channel(DG, Id),
+    Proxy = connect_a_push_supplier(Channel, PS, 'STRUCTURED_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_structured_pull_supplier_with_id
+%% Arguments  : PS - CosNotifyComm::StructuredPullSupplier
+%%              Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::StructuredProxyPullConsumer |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_structured_pull_supplier_with_id(_OE_This, #state{graph = DG} = State, PS, Id) ->
+    type_check(PS, 'CosNotifyComm_StructuredPullSupplier'),
+    Channel = lookup_channel(DG, Id),
+    Proxy = connect_a_pull_supplier(Channel, PS, 'STRUCTURED_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_sequence_push_consumer_with_id
+%% Arguments  : PC - CosNotifyComm::SequencePushConsumer
+%%              Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::SequenceProxyPushSupplier |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_sequence_push_consumer_with_id(_OE_This, #state{graph = DG} = State, PC, Id) ->
+    type_check(PC, 'CosNotifyComm_SequencePushConsumer'),
+    Channel = lookup_channel(DG, Id),
+    Proxy = connect_a_push_consumer(Channel, PC, 'SEQUENCE_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_sequence_pull_consumer_with_id
+%% Arguments  : PC - CosNotifyComm::SequencePullConsumer
+%%              Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::SequenceProxyPullSupplier |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_sequence_pull_consumer_with_id(_OE_This, #state{graph = DG} = State, PC, Id) ->
+    Channel = lookup_channel(DG, Id),
+    Proxy = connect_a_pull_consumer(Channel, PC, 'SEQUENCE_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_sequence_push_supplier_with_id
+%% Arguments  : PS - CosNotifyComm::SequencePushSupplier
+%%              Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::SequenceProxyPushConsumer |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_sequence_push_supplier_with_id(_OE_This, #state{graph = DG} = State, PS, Id) ->
+    Channel = lookup_channel(DG, Id),
+    Proxy = connect_a_push_supplier(Channel, PS, 'SEQUENCE_EVENT'),
+    {reply, Proxy, State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : connect_sequence_pull_supplier_with_id
+%% Arguments  : PS - CosNotifyComm::SequencePullSupplier
+%%              Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::SequenceProxyPullConsumer |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}} |
+%% Description: 
+%%----------------------------------------------------------------------
+connect_sequence_pull_supplier_with_id(_OE_This, #state{graph = DG} = State, PS, Id) ->
+    type_check(PS, 'CosNotifyComm_SequencePullSupplier'),
+    Channel = lookup_channel(DG, Id),
+    Proxy = connect_a_pull_supplier(Channel, PS, 'SEQUENCE_EVENT'),
+    {reply, Proxy, State}.
+
+
+%%----------------------------------------------------------------------
+%%------------------ CosNotification::QoSAdmin -------------------------
+%%---------------------------------------------------------------------%
+%% Function   : get_qos
+%% Arguments  : -
+%% Returns    : CosNotification::QoSProperties
+%% Description: 
+%%----------------------------------------------------------------------
+get_qos(_OE_This, #state{cyclic = Cyclic, diamonds = Diamonds} = State) ->
+    {reply, [#'CosNotification_Property'
+	     {name = ?DiamondDetection, 
+	      value = any:create(orber_tc:short(), Diamonds)}, 
+	     #'CosNotification_Property'
+	     {name = ?CycleDetection, 
+	      value = any:create(orber_tc:short(), Cyclic)}], State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : set_qos
+%% Arguments  : NewQoS - CosNotification::QoSProperties
+%% Returns    : ok |
+%%              {'EXCEPTION', #'CosNotification_UnsupportedQoS{}}
+%% Description: 
+%%----------------------------------------------------------------------
+set_qos(_OE_This, State, NewQoS) ->
+    QoS = cosEventDomainApp:get_qos(NewQoS),
+    set_qos_helper(QoS, State, []).
+    
+set_qos_helper([], State, []) ->
+    {reply, ok, State};
+set_qos_helper([], _, Errors) ->
+    corba:raise(#'CosNotification_UnsupportedQoS'{qos_err = Errors});
+set_qos_helper([{?DiamondDetection, Diamonds}|T], #state{diamonds = Diamonds} = State,
+	       Errors) ->
+    set_qos_helper(T, State, Errors);
+set_qos_helper([{?CycleDetection, Cyclic}|T], #state{cyclic = Cyclic} = State, 
+	       Errors) ->
+    set_qos_helper(T, State, Errors);
+set_qos_helper([{?DiamondDetection, ?AuthorizeDiamonds}|T], State, Errors) ->
+    %% Diamonds have not been allowed so far so it's safe to allow it.
+    set_qos_helper(T, State#state{diamonds = ?AuthorizeDiamonds}, Errors);
+set_qos_helper([{?DiamondDetection, ?ForbidDiamonds}|T], State, Errors) ->
+    %% If any diamonds already exists we cannot allow this. Hence, now we must check
+    %% if we can update the QoS.
+    case get_diamonds_helper(State, false) of
+	[] ->
+	    set_qos_helper(T, State#state{diamonds = ?ForbidDiamonds}, Errors);
+	_ ->
+	    set_qos_helper(T, State, 
+			   [#'CosNotification_PropertyError'
+			    {code = 'UNAVAILABLE_VALUE', 
+			     name = ?DiamondDetection, 
+			     available_range = #'CosNotification_PropertyRange'
+			     {low_val=any:create(orber_tc:short(), ?AuthorizeDiamonds), 
+			      high_val=any:create(orber_tc:short(), ?AuthorizeDiamonds)}}|Errors])
+    end;
+set_qos_helper([{?CycleDetection, _}|T], #state{cyclic = Cyclic} = State, Errors) ->
+    %% Currently we do not support changing the Cycle schema. If we want to,
+    %% we must copy the graph to a new instance of the correct type.
+    set_qos_helper(T, State, 
+		   [#'CosNotification_PropertyError'
+		    {code = 'UNAVAILABLE_VALUE', 
+		     name = ?CycleDetection, 
+		     available_range = #'CosNotification_PropertyRange'
+		     {low_val=any:create(orber_tc:short(), Cyclic), 
+		      high_val=any:create(orber_tc:short(), Cyclic)}}|Errors]).
+
+%%---------------------------------------------------------------------%
+%% Function   : validate_qos
+%% Arguments  : WantedQoS - CosNotification::QoSProperties
+%% Returns    : {ok, CosNotification::NamedPropertyRangeSeq} |
+%%              {'EXCEPTION', #'CosNotification_UnsupportedQoS{}}
+%% Description: NamedPropertyRangeSeq is of out-type
+%%----------------------------------------------------------------------
+validate_qos(_OE_This, State, WantedQoS) ->
+    QoS = cosEventDomainApp:get_qos(WantedQoS),
+    {reply, {ok, validate_qos_helper(QoS, State, [], [])}, State}.
+
+validate_qos_helper([], _, Properties, []) ->
+    Properties;
+validate_qos_helper([], _, _, Errors) ->
+    corba:raise(#'CosNotification_UnsupportedQoS'{qos_err = Errors});
+validate_qos_helper([{?DiamondDetection, ?ForbidDiamonds}|T], State, Properties, 
+		    Errors) ->
+    case get_diamonds_helper(State, false) of
+	[] ->
+	    Property = 
+		#'CosNotification_NamedPropertyRange'
+	      {name = ?DiamondDetection, 
+	       range = #'CosNotification_PropertyRange'
+	       {low_val=any:create(orber_tc:short(), ?AuthorizeDiamonds), 
+		high_val=any:create(orber_tc:short(), ?ForbidDiamonds)}},
+	    validate_qos_helper(T, State, [Property|Properties], Errors);
+	_ ->
+	    Error = 
+		#'CosNotification_PropertyError'
+	      {code = 'UNAVAILABLE_VALUE', 
+	       name = ?DiamondDetection, 
+	       available_range = #'CosNotification_PropertyRange'
+	       {low_val=any:create(orber_tc:short(), ?AuthorizeDiamonds), 
+		high_val=any:create(orber_tc:short(), ?AuthorizeDiamonds)}},
+	    validate_qos_helper(T, State, Properties, [Error|Errors])
+    end;
+validate_qos_helper([{?DiamondDetection, ?AuthorizeDiamonds}|T], State, Properties, 
+		    Errors) ->
+    Property = 
+	#'CosNotification_NamedPropertyRange'
+      {name = ?DiamondDetection, 
+       range = #'CosNotification_PropertyRange'
+       {low_val=any:create(orber_tc:short(), ?AuthorizeDiamonds), 
+	high_val=any:create(orber_tc:short(), ?ForbidDiamonds)}},
+    validate_qos_helper(T, State, [Property|Properties], Errors);
+validate_qos_helper([{?CycleDetection, Cyclic}|T], #state{cyclic = Cyclic} = State, 
+		    Properties, Errors) ->
+    validate_qos_helper(T, State, Properties, Errors);
+validate_qos_helper([{?CycleDetection, _}|T], #state{cyclic = Cyclic} = State, 
+		    Properties, Errors) ->
+    Error = 
+	#'CosNotification_PropertyError'
+      {code = 'UNAVAILABLE_VALUE', 
+       name = ?CycleDetection, 
+       available_range = #'CosNotification_PropertyRange'
+       {low_val=any:create(orber_tc:short(), Cyclic), 
+	high_val=any:create(orber_tc:short(), Cyclic)}},
+    validate_qos_helper(T, State, Properties, [Error|Errors]).
+
+
+%%----------------------------------------------------------------------
+%%------------------ CosNotification::AdminPropertiesAdmin -------------
+%%---------------------------------------------------------------------%
+%% Function   : get_admin
+%% Arguments  : -
+%% Returns    : CosNotification::AdminProperties
+%% Description: No Admins currently supported
+%%----------------------------------------------------------------------
+get_admin(_OE_This, State) ->
+    {reply, [], State}.
+
+%%---------------------------------------------------------------------%
+%% Function   : set_admin
+%% Arguments  : NewAdmins - CosNotification::AdminProperties
+%% Returns    : ok |
+%%              {'EXCEPTION', #'CosNotification_UnsupportedAdmin{}}
+%% Description: No Admins currently supported
+%%----------------------------------------------------------------------
+set_admin(_OE_This, State, NewAdmins) ->
+    cosEventDomainApp:get_admin(NewAdmins),
+    {reply, ok, State}.
+
+
+%%======================================================================
+%% Internal functions
+%%======================================================================
+%%---------------------------------------------------------------------%
+%% Function   : find_candidates
+%% Arguments  : Digraph reference
+%%              (Vertex - if we're interested in a specific vertex.
+%% Returns    : {[SourceVertices], [SinkVertices], Max}
+%%              SourceVertices - {Vertice, [ReachableVertices]}
+%%              SinkVertices - {Vertice, [ReachingVertices]}
+%%              Max - number of edges in the graph.
+%% Description: To be a part of a diamond ("transitive" relation xRy, yRz => xRz; 
+%%              in comparison with discrete mathematics we do not require that the
+%%              entire graph is transitive) a vertex must have more than one
+%%              outgoing and/or incoming. Hence, a digraph must contain at least
+%%              one vertex with more than one outgoing edges and at least
+%%              one with more than one incoming edges for a diamond to exist.
+%%              Hence, the purpose of this function is to find vertices that
+%%              look like:
+%%              
+%%              Vout->V1           V6->Vin
+%%                  \         and      ^
+%%                   +->V2             |
+%%                                 V8--+
+%%----------------------------------------------------------------------
+find_candidates(DG) ->
+    Edges = digraph:edges(DG),
+    {COut, CIn, Max} = find_candidates_helper(Edges, [], [], DG, 0),
+    {filter_candidates(COut), filter_candidates(CIn), Max}.
+
+
+find_candidates(DG, _Vertex) ->
+    %% We should use the fact that we know one of the vertices.
+    Edges = digraph:edges(DG),
+    {COut, CIn, Max} = find_candidates_helper(Edges, [], [], DG, 0),
+    {filter_candidates(COut), filter_candidates(CIn), Max}.
+
+find_candidates_helper([], AccOut, AccIn, _, Counter) ->
+    {lists:sort(AccOut), lists:sort(AccIn), Counter};
+find_candidates_helper([H|T], AccOut, AccIn, DG, Counter) ->
+    {H, V1, V2, _Label} = digraph:edge(DG, H),
+    find_candidates_helper(T, [{V1, V2}|AccOut], [{V2,V1}|AccIn], DG, Counter+1).
+
+filter_candidates([]) ->
+    [];
+filter_candidates([{V1, V2}|T]) ->
+    filter_candidates([{V1, V2}|T], V1, [], []).
+filter_candidates([], _V, [_Acc1], Acc2) ->
+    %% Only one in/out connection. Hence, cannot be start- or end-point
+    %% of a diamond.
+    lists:reverse(Acc2);
+filter_candidates([], V, Acc1, Acc2) ->
+    lists:reverse([{V, lists:reverse(Acc1)}|Acc2]);
+filter_candidates([{V1, V2}|T], V1, Acc1, Acc2) ->
+    filter_candidates(T, V1, [V2|Acc1], Acc2);
+filter_candidates([{V1, V2}|T], _V, [_Acc1], Acc2) ->
+    %% Only one in/out connection. Hence, cannot be start- or end-point
+    %% of a diamond.
+    filter_candidates(T, V1, [V2], Acc2);
+filter_candidates([{V1, V2}|T], V, Acc1, Acc2) ->
+    filter_candidates(T, V1, [V2], [{V, lists:reverse(Acc1)}|Acc2]).
+
+%%---------------------------------------------------------------------%
+%% Function   : evaluate_candidates
+%% Arguments  : -
+%% Returns    : [Diamond]
+%% Description: There are several scenarios but they can be categorized as:
+%%              (1)       (2)     (3)        (4)
+%%                2         2                  2-..-56
+%%               / \       / \                /      \
+%%              1---4     1---4   1---4      1        4
+%%               \ /               \ /        \      /
+%%                3                 3          3-..-11
+%%
+%%              The purpose of this function is to find these in the cheapest
+%%              way possible. For complex diamonds (may also include cycles)
+%%              duplicates may be generated. For example, #2/#3 is a sub-set of #1
+%%              but they are as well diamonds.
+%%----------------------------------------------------------------------
+evaluate_candidates(_DG, [], _, Acc, _Max, _) ->
+    Acc;
+evaluate_candidates(DG, [{V, OutV}|T], CIn, Acc, Max, FindAll) ->
+    case evaluate_candidates_helper(DG, V, OutV, CIn, [], FindAll) of
+	[] ->
+	    evaluate_candidates(DG, T, CIn, Acc, Max, FindAll);
+	Diamonds when FindAll == true ->
+	    %% May be more than one diamond.
+	    evaluate_candidates(DG, T, CIn, Diamonds ++ Acc, Max, FindAll);
+	Diamond ->
+	    Diamond
+    end.
+
+evaluate_candidates_helper(_, _, _, _, [Diamond], false) ->
+    Diamond;
+evaluate_candidates_helper(_, _, _, [], Diamonds, _) ->
+    Diamonds;
+evaluate_candidates_helper(DG, V1, OutV, [{V1, _InV}|T], Diamonds, FindAll) ->
+    evaluate_candidates_helper(DG, V1, OutV, T, Diamonds, FindAll);
+evaluate_candidates_helper(DG, V1, OutV, [{V2, InV}|T], Diamonds, FindAll) ->
+    case double_match(OutV, InV, [], V1, V2) of
+	[] ->
+	    case is_member(InV, V1) of
+		true ->
+		    %% At this point we know that we have:
+		    %%  x -> y
+		    %% For this pair to be a part of a diamond we have two options:
+		    %% (1) x - y      (2) x ---- y
+		    %%      \ /   or       \    /   or a additional path besides z1-zN,
+		    %%       z              z1-zN
+		    case double_match_exclude(OutV, InV, [], V1, V2) of
+			[] ->
+			    %% Nope it's not #1.
+			    case digraph_match(OutV, V2, V1, DG, 1) of
+				false ->
+				    evaluate_candidates_helper(DG, V1, OutV, T, 
+							       Diamonds, FindAll);
+				Diamond ->
+				    evaluate_candidates_helper(DG, V1, OutV, T,  
+							       [[[V1, V2]|Diamond]|Diamonds], 
+							       FindAll)
+			    end;
+			Diamond ->
+			    %% We've found a diamond looking like:
+			    %%   x - y     xRy, yRz => xRz
+			    %%    \ /
+			    %%     z
+			    evaluate_candidates_helper(DG, V1, OutV, T, 
+						       [[[V1, V2]|Diamond]|Diamonds], 
+						       FindAll)
+		    end;
+		false ->
+		    case digraph_match(OutV, V2, V1, DG) of
+			false ->
+			    evaluate_candidates_helper(DG, V1, OutV, T, 
+						       Diamonds, FindAll);
+			Diamond ->
+			    evaluate_candidates_helper(DG, V1, OutV, T,  
+						       [Diamond|Diamonds], FindAll)
+		    end
+	    end;
+	Diamond ->
+	    %% We've found a diamond looking something like:
+	    %%   2
+	    %%  / \
+	    %% 1-5-4  V1 eq. 1, V2 eq 4.
+	    %%  \ / 
+	    %%   3
+	    evaluate_candidates_helper(DG, V1, OutV, T, [Diamond|Diamonds], 
+				       FindAll)
+    end.
+
+is_member([], _) ->
+    false;
+is_member([H|_], H) ->
+    true;
+is_member([H|_], H2) when H > H2 ->
+    %% Since it's a sorted list no need to look any further.
+    false;
+is_member([_|T], H) ->
+    is_member(T, H).
+
+double_match([], _, [_Matched], _, _) ->
+    [];
+double_match([], _, Matched, _, _) ->
+    Matched;
+double_match(_, [], [_Matched], _, _) ->
+    [];
+double_match(_, [], Matched, _, _) ->
+    Matched;
+double_match([H|T1], [H|T2], Matched, V1, V2) ->
+    double_match(T1, T2, [[V1,H,V2] | Matched], V1, V2);
+double_match([H1|T1], [H2|T2], Matched, V1, V2) when H1 > H2 ->
+    double_match([H1|T1], T2, Matched, V1, V2);
+double_match([_H1|T1], [H2|T2], Matched, V1, V2) ->
+    double_match(T1, [H2|T2], Matched, V1, V2).
+
+double_match_exclude([], _, Matched, _, _) ->
+    Matched;
+double_match_exclude(_, [], Matched, _, _) ->
+    Matched;
+%% exclude it
+double_match_exclude([V2|T1], CIn, Matched, V1, V2) ->
+    double_match_exclude(T1, CIn, Matched, V1, V2);
+%% exclude it
+double_match_exclude(COut, [V1|T2], Matched, V1, V2) ->
+    double_match_exclude(COut, T2, Matched, V1, V2);
+%% Found match
+double_match_exclude([H|T1], [H|T2], Matched, V1, V2) ->
+    double_match_exclude(T1, T2, [[V1,H,V2] | Matched], V1, V2);
+double_match_exclude([H1|T1], [H2|T2], Matched, V1, V2) when H1 > H2 ->
+    double_match_exclude([H1|T1], T2, Matched, V1, V2);
+double_match_exclude([_H1|T1], [H2|T2], Matched, V1, V2) ->
+    double_match_exclude(T1, [H2|T2], Matched, V1, V2).
+
+
+digraph_match(OutV, V2, V1, DG) ->
+    digraph_match(OutV, V2, V1, DG, [], 0).
+
+digraph_match(OutV, V2, V1, DG, Counter) ->
+    digraph_match(OutV, V2, V1, DG, [], Counter).
+
+digraph_match([], _, _, _, _, Counter) when Counter < 2 ->
+    false;
+digraph_match([], _, _, _, Acc, _) ->
+    Acc;
+digraph_match([Vin|T], Vin, Vout, DG, Acc, Counter) ->
+    digraph_match(T, Vin, Vout, DG, Acc, Counter);
+digraph_match([H|T], Vin, Vout, DG, Acc, Counter) ->
+    case get_path(DG, H, Vin, H, Vout) of
+	false ->
+	    digraph_match(T, Vin, Vout, DG, Acc, Counter);
+	Path ->
+	    %% Found one path; now me must se if there are one more.
+	    digraph_match(T, Vin, Vout, DG, [[Vout|lists:reverse(Path)] | Acc], 
+			  Counter+1)
+    end.
+
+get_path(G, V1, V2, E1, E2) ->
+    one_path(digraph:out_neighbours(G, V1), V2, [], [V1], [V1], G, E1, E2).
+
+one_path([E1|_Vs], W, Cont, Xs, Ps, G, E1, E2) ->
+    one_path([], W, Cont, Xs, Ps, G, E1, E2);
+one_path([E2|_Vs], W, Cont, Xs, Ps, G, E1, E2) ->
+    one_path([], W, Cont, Xs, Ps, G, E1, E2);
+one_path([W|_Ws], W, _Cont, _Xs, Ps, _G, _E1, _E2) ->
+    [W|Ps];
+one_path([V|Vs], W, Cont, Xs, Ps, G, E1, E2) ->
+    case lists:member(V, Xs) of
+	true ->  one_path(Vs, W, Cont, Xs, Ps, G, E1, E2);
+	false -> one_path(digraph:out_neighbours(G, V), W, 
+			  [{Vs,Ps} | Cont], [V|Xs], [V|Ps], G, E1, E2)
+    end;
+one_path([], W, [{Vs,Ps}|Cont], Xs, _, G, E1, E2) ->
+    one_path(Vs, W, Cont, Xs, Ps, G, E1, E2);
+one_path([], _, [], _, _, _, _, _) -> false.
+
+%%---------------------------------------------------------------------%
+%% function : type_check
+%% Arguments: Obj  - objectrefernce to test.
+%%            Mod  - Module which contains typeID/0.
+%% Returns  : 'ok' or raises exception.
+%% Effect   : 
+%%----------------------------------------------------------------------
+type_check(Obj, Mod) ->
+    case catch corba_object:is_a(Obj,Mod:typeID()) of
+        true ->
+            ok;
+        What ->
+	    orber:dbg("[~p] CosEventDomainAdmin:type_check();~n"
+		      "Object of incorrect type supplied; should be: ~p~n"
+		      "Failed due to: ~p", [?LINE, Mod, What], ?DEBUG_LEVEL),
+            corba:raise(#'BAD_PARAM'{minor=507, completion_status=?COMPLETED_NO})
+    end.
+
+%%---------------------------------------------------------------------%
+%% function : lookup_channel
+%% Arguments: DG - digraph reference
+%%            Id - CosEventDomainAdmin::MemberID (long())
+%% Returns    : CosNotifyChannelAdmin::EventChannel |
+%%              {'EXCEPTION', #'CosNotifyChannelAdmin_ChannelNotFound'{}}
+%% Effect   : 
+%%----------------------------------------------------------------------
+lookup_channel(DG, Id) ->
+    case digraph:vertex(DG, Id) of
+	{Id, Channel} ->
+	    Channel;
+	false ->
+	    corba:raise(#'CosNotifyChannelAdmin_ChannelNotFound'{})
+    end.
+
+
+%%---------------------------------------------------------------------%
+%% function : lookup_connection
+%% Arguments: DG - digraph reference
+%%            Id - CosEventDomainAdmin::ConnectionID (long())
+%% Returns    : #connectio{} |
+%%              {'EXCEPTION', #'CosEventDomainAdmin_ConnectionNotFound'{}}
+%% Effect   : 
+%%----------------------------------------------------------------------
+lookup_connection(DG, Id) ->
+    case digraph:edge(DG, Id) of
+	{Id, _SId, _CId, Connection} ->
+	    Connection;
+	false ->
+	    corba:raise(#'CosEventDomainAdmin_ConnectionNotFound'{})
+    end.
+
+%%---------------------------------------------------------------------%
+%% function : lookup_connection_data
+%% Arguments: DG - digraph reference
+%%            Id - CosEventDomainAdmin::ConnectionID (long())
+%% Returns  : CosEventDomainAdmin::Connection |
+%%            {'EXCEPTION', #'CosEventDomainAdmin_ConnectionNotFound'{}}
+%% Effect   : 
+%%----------------------------------------------------------------------
+lookup_connection_data(DG, Id) ->
+    case digraph:edge(DG, Id) of
+	{Id, _SId, _CId, #connection{data = Connection}} ->
+	    Connection;
+	false ->
+	    corba:raise(#'CosEventDomainAdmin_ConnectionNotFound'{})
+    end.
+
+%%---------------------------------------------------------------------%
+%% function : close_connections
+%% Arguments: DG -digraph reference
+%%            [CosEventDomainAdmin::ConnectionID] - [long()]
+%% Returns  : ok
+%% Effect   : 
+%%----------------------------------------------------------------------
+close_connections(_DG, []) ->
+    ok;
+close_connections(DG, [H|T]) ->
+    #connection{supplier=S, consumer=C, data=Connection} = 
+	lookup_connection(DG, H),
+    close_connection(Connection, S, C),
+    digraph:del_edge(DG, H),
+    close_connections(DG, T).
+
+%%---------------------------------------------------------------------%
+%% function : close_connection
+%% Arguments: CosEventDomainAdmin::Connection
+%%            S - SupplierProxy
+%%            C - ConsumerProxy
+%% Returns  : ok
+%% Effect   : 
+%%----------------------------------------------------------------------
+close_connection(#'CosEventDomainAdmin_Connection'{ctype=Type,
+						  notification_style = Style},
+		S, C) ->
+    case {Type, Style} of
+	{'ANY_EVENT', 'Push'} ->
+	    catch 'CosNotifyChannelAdmin_ProxyPushSupplier':disconnect_push_supplier(S),
+	    catch 'CosNotifyChannelAdmin_ProxyPushConsumer':disconnect_push_consumer(C);
+	{'ANY_EVENT', 'Pull'} ->
+	    catch 'CosNotifyChannelAdmin_ProxyPullSupplier':disconnect_pull_supplier(S),
+	    catch 'CosNotifyChannelAdmin_ProxyPullConsumer':disconnect_pull_consumer(C);
+	{'STRUCTURED_EVENT', 'Push'} ->
+	    catch 'CosNotifyChannelAdmin_StructuredProxyPushSupplier':disconnect_structured_push_supplier(S),
+	    catch 'CosNotifyChannelAdmin_StructuredProxyPushConsumer':disconnect_structured_push_consumer(C);
+	{'STRUCTURED_EVENT', 'Pull'} ->
+	    catch 'CosNotifyChannelAdmin_StructuredProxyPullSupplier':disconnect_structured_pull_supplier(S),
+	    catch 'CosNotifyChannelAdmin_StructuredProxyPullConsumer':disconnect_structured_pull_consumer(C);
+	{'SEQUENCE_EVENT', 'Push'} ->
+	    catch 'CosNotifyChannelAdmin_SequenceProxyPushSupplier':disconnect_sequence_push_supplier(S),
+	    catch 'CosNotifyChannelAdmin_SequenceProxyPushConsumer':disconnect_sequence_push_consumer(C);
+	{'SEQUENCE_EVENT', 'Pull'}->
+	    catch 'CosNotifyChannelAdmin_SequenceProxyPullSupplier':disconnect_sequence_pull_supplier(S),
+	    catch 'CosNotifyChannelAdmin_SequenceProxyPullConsumer':disconnect_sequence_pull_consumer(C)
+    end,
+    ok.
+
+%%---------------------------------------------------------------------%
+%% function : setup_connection
+%% Arguments: CosEventDomainAdmin::Connection
+%%            S - SupplierProxy
+%%            C - ConsumerProxy
+%% Returns  : {ok, SupplierProxy, ConsumerProxy};
+%% Effect   : 
+%%----------------------------------------------------------------------
+setup_connection(#'CosEventDomainAdmin_Connection'{ctype=Type,
+						   notification_style = Style},
+		S, C) ->
+    Admin = 
+	'CosNotifyChannelAdmin_EventChannel':'_get_default_consumer_admin'(S),
+    case Style of
+	'Push' ->
+	    {Proxy, _Id} = 
+		'CosNotifyChannelAdmin_ConsumerAdmin':
+		obtain_notification_push_supplier(Admin, Type),
+	    CProxy = connect_a_push_supplier(C, Proxy, Type),
+	    case Type of
+		'ANY_EVENT' ->
+		    'CosNotifyChannelAdmin_ProxyPushSupplier':
+			connect_any_push_consumer(Proxy, CProxy);
+		'STRUCTURED_EVENT' ->
+		    'CosNotifyChannelAdmin_StructuredProxyPushSupplier':
+			connect_structured_push_consumer(Proxy, CProxy);
+		'SEQUENCE_EVENT' ->
+		    'CosNotifyChannelAdmin_SequenceProxyPushSupplier':
+			connect_sequence_push_consumer(Proxy, CProxy)
+	    end,
+	    {ok, Proxy, CProxy};
+	'Pull' ->
+	    {Proxy, _Id} = 
+		'CosNotifyChannelAdmin_ConsumerAdmin':
+		obtain_notification_pull_supplier(Admin, Type),
+	    CProxy = connect_a_pull_supplier(C, Proxy, Type),
+	    case Type of
+		'ANY_EVENT' ->
+		    'CosNotifyChannelAdmin_ProxyPullSupplier':
+			connect_any_pull_consumer(Proxy, CProxy);
+		'STRUCTURED_EVENT' ->
+		    'CosNotifyChannelAdmin_StructuredProxyPullSupplier':
+			connect_structured_pull_consumer(Proxy, CProxy);
+		'SEQUENCE_EVENT' ->
+		    'CosNotifyChannelAdmin_SequenceProxyPullSupplier':
+			connect_sequence_pull_consumer(Proxy, CProxy)
+	    end,
+	    {ok, Proxy, CProxy}
+    end.
+
+%%---------------------------------------------------------------------%
+%% function : connect_a_pull_consumer
+%% Arguments: Channel - CosNotifyChannelAdmin::EventChannel | undefined
+%%            PC - a PullConsumer
+%%            Type - 'ANY_EVENT' | 'STRUCTURED_EVENT' | 'SEQUENCE_EVENT'
+%% Returns  : 
+%% Effect   : 
+%%----------------------------------------------------------------------
+connect_a_pull_consumer(undefined, _, _) ->
+    corba:raise(#'CosNotifyChannelAdmin_ChannelNotFound'{});
+connect_a_pull_consumer(Channel, PC, Type) ->
+    Admin = 
+	'CosNotifyChannelAdmin_EventChannel':'_get_default_consumer_admin'(Channel),
+    {Proxy, _Id} = 
+	'CosNotifyChannelAdmin_ConsumerAdmin':obtain_notification_pull_supplier(Admin, 
+										Type),
+    case Type of
+	'ANY_EVENT' ->
+	    'CosNotifyChannelAdmin_ProxyPullSupplier':connect_any_pull_consumer(Proxy, PC);
+	'STRUCTURED_EVENT' ->
+	    'CosNotifyChannelAdmin_StructuredProxyPullSupplier':connect_structured_pull_consumer(Proxy, PC);
+	'SEQUENCE_EVENT' ->
+	    'CosNotifyChannelAdmin_SequenceProxyPullSupplier':connect_sequence_pull_consumer(Proxy, PC)
+    end,
+    Proxy.
+
+%%---------------------------------------------------------------------%
+%% function : connect_a_push_consumer
+%% Arguments: Channel - CosNotifyChannelAdmin::EventChannel | undefined
+%%            PC - a PushConsumer
+%%            Type - 'ANY_EVENT' | 'STRUCTURED_EVENT' | 'SEQUENCE_EVENT'
+%% Returns  : 
+%% Effect   : 
+%%----------------------------------------------------------------------
+connect_a_push_consumer(undefined, _, _) ->
+    corba:raise(#'CosNotifyChannelAdmin_ChannelNotFound'{});
+connect_a_push_consumer(Channel, PC, Type) ->
+    Admin = 
+	'CosNotifyChannelAdmin_EventChannel':'_get_default_consumer_admin'(Channel),
+    {Proxy, _Id} = 
+	'CosNotifyChannelAdmin_ConsumerAdmin':obtain_notification_push_supplier(Admin, 
+										Type),
+    case Type of
+	'ANY_EVENT' ->
+	    'CosNotifyChannelAdmin_ProxyPushSupplier':connect_any_push_consumer(Proxy, PC);
+	'STRUCTURED_EVENT' ->
+	    'CosNotifyChannelAdmin_StructuredProxyPushSupplier':connect_structured_push_consumer(Proxy, PC);
+	'SEQUENCE_EVENT' ->
+	    'CosNotifyChannelAdmin_SequenceProxyPushSupplier':connect_sequence_push_consumer(Proxy, PC)
+    end,
+    Proxy.
+
+%%---------------------------------------------------------------------%
+%% function : connect_a_pull_supplier
+%% Arguments: Channel - CosNotifyChannelAdmin::EventChannel | undefined
+%%            PC - a PullSupplier
+%%            Type - 'ANY_EVENT' | 'STRUCTURED_EVENT' | 'SEQUENCE_EVENT'
+%% Returns  : 
+%% Effect   : 
+%%----------------------------------------------------------------------
+connect_a_pull_supplier(undefined, _, _) ->
+    corba:raise(#'CosNotifyChannelAdmin_ChannelNotFound'{});
+connect_a_pull_supplier(Channel, PS, Type) ->
+    Admin = 
+	'CosNotifyChannelAdmin_EventChannel':'_get_default_supplier_admin'(Channel),
+    {Proxy, _Id} = 
+	'CosNotifyChannelAdmin_SupplierAdmin':obtain_notification_pull_consumer(Admin, 
+										Type),
+    case Type of
+	'ANY_EVENT' ->
+	    'CosNotifyChannelAdmin_ProxyPullConsumer':connect_any_pull_supplier(Proxy, PS);
+	'STRUCTURED_EVENT' ->
+	    'CosNotifyChannelAdmin_StructuredProxyPullConsumer':connect_structured_pull_supplier(Proxy, PS);
+	'SEQUENCE_EVENT' ->
+	    'CosNotifyChannelAdmin_SequenceProxyPullConsumer':connect_sequence_pull_supplier(Proxy, PS)
+    end,
+    Proxy.
+
+%%---------------------------------------------------------------------%
+%% function : connect_a_push_supplier
+%% Arguments: Channel - CosNotifyChannelAdmin::EventChannel | undefined
+%%            PC - a PushSupplier
+%%            Type - 'ANY_EVENT' | 'STRUCTURED_EVENT' | 'SEQUENCE_EVENT'
+%% Returns  : 
+%% Effect   : 
+%%----------------------------------------------------------------------
+connect_a_push_supplier(undefined, _, _) ->
+    corba:raise(#'CosNotifyChannelAdmin_ChannelNotFound'{});
+connect_a_push_supplier(Channel, PS, Type) ->
+    Admin = 
+	'CosNotifyChannelAdmin_EventChannel':'_get_default_supplier_admin'(Channel),
+    {Proxy, _Id} = 
+	'CosNotifyChannelAdmin_SupplierAdmin':obtain_notification_push_consumer(Admin, 
+										Type),
+    case Type of
+	'ANY_EVENT' ->
+	    'CosNotifyChannelAdmin_ProxyPushConsumer':connect_any_push_supplier(Proxy, PS);
+	'STRUCTURED_EVENT' ->
+	    'CosNotifyChannelAdmin_StructuredProxyPushConsumer':connect_structured_push_supplier(Proxy, PS);
+	'SEQUENCE_EVENT' ->
+	    'CosNotifyChannelAdmin_SequenceProxyPushConsumer':connect_sequence_push_supplier(Proxy, PS)
+    end,
+    Proxy.
+
+
+%%======================================================================
+%% END OF MODULE
+%%======================================================================
+