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-rw-r--r--lib/cosEvent/src/oe_CosEventComm_PullerS_impl.erl282
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diff --git a/lib/cosEvent/src/oe_CosEventComm_PullerS_impl.erl b/lib/cosEvent/src/oe_CosEventComm_PullerS_impl.erl
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--- a/lib/cosEvent/src/oe_CosEventComm_PullerS_impl.erl
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@@ -1,282 +0,0 @@
-%%--------------------------------------------------------------------
-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2001-2015. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%% http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%
-%% %CopyrightEnd%
-%%
-%%
-%%----------------------------------------------------------------------
-%% File : oe_CosEventComm_PullerS_impl.erl
-%% Description :
-%%
-%%----------------------------------------------------------------------
--module(oe_CosEventComm_PullerS_impl).
-
-%%----------------------------------------------------------------------
-%% Include files
-%%----------------------------------------------------------------------
--include_lib("orber/include/corba.hrl").
--include("CosEventChannelAdmin.hrl").
--include("CosEventComm.hrl").
--include("cosEventApp.hrl").
-
-%%----------------------------------------------------------------------
-%% External exports
-%%----------------------------------------------------------------------
--export([init/1,
- terminate/2,
- code_change/3,
- handle_info/2]).
-%% Exports from "CosEventChannelAdmin::ProxyPullSupplier"
--export([connect_pull_consumer/4]).
-
-%% Exports from "CosEventComm::PullSupplier"
--export([pull/3,
- try_pull/3,
- disconnect_pull_supplier/3]).
-
-%%----------------------------------------------------------------------
-%% Internal exports
-%%----------------------------------------------------------------------
-%% Exports from "oe_CosEventComm::Event
--export([send/3, send_sync/4]).
-
-%%----------------------------------------------------------------------
-%% Records
-%%----------------------------------------------------------------------
--record(state, {admin_pid, client, db, respond_to, typecheck, maxevents}).
-
-%%----------------------------------------------------------------------
-%% Macros
-%%----------------------------------------------------------------------
-
-%%======================================================================
-%% External functions
-%%======================================================================
-%%---------------------------------------------------------------------%
-%% Function : init/1
-%% Returns : {ok, State} |
-%% {ok, State, Timeout} |
-%% ignore |
-%% {stop, Reason}
-%% Description: Initiates the server
-%%----------------------------------------------------------------------
-init([AdminPid, TypeCheck, MaxEvents]) ->
- process_flag(trap_exit, true),
- {ok, #state{admin_pid = AdminPid,
- db = ets:new(oe_ets, [set, private, ordered_set]),
- typecheck = TypeCheck, maxevents = MaxEvents}}.
-
-%%---------------------------------------------------------------------%
-%% function : handle_info
-%% Arguments:
-%% Returns : {noreply, State} |
-%% {stop, Reason, State}
-%% Effect : Functions demanded by the gen_server module.
-%% The CosEvent specification states:
-%% "A nil object reference may be passed to the connect_pull_consumer operation;
-%% if so a channel cannot invoke a disconnect_pull_consumer operation on the
-%% consumer; the consumer may be disconnected from the channel without being
-%% informed."
-%% If we would invoke the disconnect_pull_consumer operation
-%% at the same time as the client tries to pull an event it
-%% would cause a dead-lock. We can solve this by spawning a process
-%% but as is the client will discover that the object no longer exists
-%% the next time it tries to pull an event.
-%%----------------------------------------------------------------------
-handle_info({'EXIT', Pid, Reason}, #state{admin_pid = Pid} = State) ->
- orber:dbg("[~p] oe_CosEventComm_PullerS_impl:handle_info(~p);~n"
- "My Admin terminated and so will I.",
- [?LINE, Reason], ?DEBUG_LEVEL),
- {stop, Reason, State};
-handle_info(_Info, State) ->
- ?DBG("Unknown Info ~p~n", [_Info]),
- {noreply, State}.
-
-%%---------------------------------------------------------------------%
-%% Function : terminate/2
-%% Returns : any (ignored by gen_server)
-%% Description: Shutdown the server
-%%----------------------------------------------------------------------
-terminate(_Reason, #state{client = undefined, respond_to = undefined, db = DB}) ->
- ?DBG("Terminating ~p; no client connected and no pending pull's.~n", [_Reason]),
- ets:delete(DB),
- ok;
-terminate(_Reason, #state{client = undefined, respond_to = ReplyTo, db = DB}) ->
- ?DBG("Terminating ~p; no client connected but a pending pull.~n", [_Reason]),
- corba:reply(ReplyTo, {'EXCEPTION', #'CosEventComm_Disconnected'{}}),
- ets:delete(DB),
- ok;
-terminate(_Reason, #state{client = Client, respond_to = undefined, db = DB}) ->
- ?DBG("Terminating ~p; no pending pull~n", [_Reason]),
- cosEventApp:disconnect('CosEventComm_PullConsumer',
- disconnect_pull_consumer, Client),
- ets:delete(DB),
- ok;
-terminate(_Reason, #state{client = Client, respond_to = ReplyTo, db = DB}) ->
- ?DBG("Terminating ~p; pending pull~n", [_Reason]),
- corba:reply(ReplyTo, {'EXCEPTION', #'CosEventComm_Disconnected'{}}),
- cosEventApp:disconnect('CosEventComm_PullConsumer',
- disconnect_pull_consumer, Client),
- ets:delete(DB),
- ok.
-
-%%---------------------------------------------------------------------%
-%% Function : code_change/3
-%% Returns : {ok, NewState}
-%% Description: Convert process state when code is changed
-%%----------------------------------------------------------------------
-code_change(_OldVsn, State, _Extra) ->
- {ok, State}.
-
-%%---------------------------------------------------------------------%
-%% Function : connect_pull_consumer
-%% Arguments :
-%% Returns :
-%% Description:
-%%----------------------------------------------------------------------
-connect_pull_consumer(_OE_This, _OE_From, #state{client = undefined,
- typecheck = TypeCheck} = State,
- NewClient) ->
- case corba_object:is_nil(NewClient) of
- true ->
- ?DBG("A NIL client supplied.~n", []),
- {reply, ok, State};
- false ->
- cosEventApp:type_check(NewClient, 'CosEventComm_PullConsumer', TypeCheck),
- ?DBG("Connected to client.~n", []),
- {reply, ok, State#state{client = NewClient}}
- end;
-connect_pull_consumer(_, _, _, _) ->
- corba:raise(#'CosEventChannelAdmin_AlreadyConnected'{}).
-
-
-%%---------------------------------------------------------------------%
-%% Function : pull
-%% Arguments :
-%% Returns :
-%% Description:
-%%----------------------------------------------------------------------
-pull(_OE_This, OE_From, State) ->
- case get_event(State#state.db) of
- false ->
- ?DBG("pull invoked but no event stored; put the client on hold.~n", []),
- {noreply, State#state{respond_to = OE_From}};
- Event ->
- ?DBG("pull invoked and returned: ~p~n", [Event]),
- {reply, Event, State}
- end.
-
-%%---------------------------------------------------------------------%
-%% Function : try_pull
-%% Arguments :
-%% Returns :
-%% Description:
-%%----------------------------------------------------------------------
-try_pull(_OE_This, _OE_From, State) ->
- case get_event(State#state.db) of
- false ->
- ?DBG("try_pull invoked but no event stored.~n", []),
- {reply, {any:create(orber_tc:long(), 0), false}, State};
- Event ->
- ?DBG("try_pull invoked and returned: ~p~n", [Event]),
- {reply, {Event, true}, State}
- end.
-
-%%---------------------------------------------------------------------%
-%% Function : disconnect_pull_supplier
-%% Arguments :
-%% Returns :
-%% Description:
-%%----------------------------------------------------------------------
-disconnect_pull_supplier(_OE_This, _OE_From, State) ->
- ?DBG("Disconnect invoked ~p ~n", [State]),
- {stop, normal, ok, State#state{client = undefined}}.
-
-
-%%======================================================================
-%% Internal functions
-%%======================================================================
-%%---------------------------------------------------------------------%
-%% Function : send
-%% Arguments :
-%% Returns :
-%% Description:
-%%----------------------------------------------------------------------
-send(_OE_This, #state{respond_to = undefined} = State, Any) ->
- ?DBG("Received event ~p and stored it.~n", [Any]),
- store_event(State#state.db, State#state.maxevents, Any),
- {noreply, State};
-send(_OE_This, State, Any) ->
- ?DBG("Received event ~p and sent it to pending client.~n", [Any]),
- corba:reply(State#state.respond_to, Any),
- {noreply, State#state{respond_to = undefined}}.
-
-%%---------------------------------------------------------------------%
-%% Function : send_sync
-%% Arguments :
-%% Returns :
-%% Description:
-%%----------------------------------------------------------------------
-send_sync(_OE_This, _OE_From, #state{respond_to = undefined} = State, Any) ->
- ?DBG("Received event ~p and stored it (sync).~n", [Any]),
- store_event(State#state.db, State#state.maxevents, Any),
- {reply, ok, State};
-send_sync(_OE_This, _OE_From, State, Any) ->
- ?DBG("Received event ~p and sent it to pending client (sync).~n", [Any]),
- corba:reply(State#state.respond_to, Any),
- {reply, ok, State#state{respond_to = undefined}}.
-
-
-%%---------------------------------------------------------------------%
-%% Function : store_event
-%% Arguments : DB - ets reference
-%% Event - CORBA::Any
-%% Returns : true
-%% Description: Insert the event in FIFO order.
-%%----------------------------------------------------------------------
-store_event(DB, Max, Event) ->
- case ets:info(DB, size) of
- CurrentSize when CurrentSize < Max ->
- ets:insert(DB, {{erlang:system_time(), erlang:unique_integer([positive])},
- Event});
- _ ->
- orber:dbg("[~p] oe_CosEventComm_PullerS:store_event(~p); DB full drop event.",
- [?LINE, Event], ?DEBUG_LEVEL),
- true
- end.
-
-%%---------------------------------------------------------------------%
-%% Function : get_event
-%% Arguments : DB - ets reference
-%% Event - CORBA::Any
-%% Returns : false | Event (CORBA::Any)
-%% Description: Lookup event in FIFO order; return false if no event exists.
-%%----------------------------------------------------------------------
-get_event(DB) ->
- case ets:first(DB) of
- '$end_of_table' ->
- false;
- Key ->
- [{_, Event}] = ets:lookup(DB, Key),
- ets:delete(DB, Key),
- Event
- end.
-
-%%======================================================================
-%% END OF MODULE
-%%======================================================================
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