Packages

amqp_client

3.0.2
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RabbitMQ AMQP Client

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Files

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amqp_client src amqp_direct_connection.erl
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src/amqp_direct_connection.erl

%% The contents of this file are subject to the Mozilla Public License
%% Version 1.1 (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.mozilla.org/MPL/
%%
%% 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.
%%
%% The Original Code is RabbitMQ.
%%
%% The Initial Developer of the Original Code is VMware, Inc.
%% Copyright (c) 2007-2012 VMware, Inc. All rights reserved.
%%
%% @private
-module(amqp_direct_connection).
-include("amqp_client_internal.hrl").
-behaviour(amqp_gen_connection).
-export([server_close/3]).
-export([init/1, terminate/2, connect/4, do/2, open_channel_args/1, i/2,
info_keys/0, handle_message/2, closing/3, channels_terminated/1]).
-record(state, {node,
user,
vhost,
params,
adapter_info,
collector,
closing_reason %% undefined | Reason
}).
-define(INFO_KEYS, [type]).
-define(CREATION_EVENT_KEYS, [pid, protocol, host, port, name,
peer_host, peer_port,
user, vhost, client_properties, type]).
%%---------------------------------------------------------------------------
%% amqp_connection:close() logically closes from the client end. We may
%% want to close from the server end.
server_close(ConnectionPid, Code, Text) ->
Close = #'connection.close'{reply_text = Text,
reply_code = Code,
class_id = 0,
method_id = 0},
amqp_gen_connection:server_close(ConnectionPid, Close).
init([]) ->
{ok, #state{}}.
open_channel_args(#state{node = Node,
user = User,
vhost = VHost,
adapter_info = Info,
collector = Collector}) ->
[self(), Info#amqp_adapter_info.name, Node, User, VHost, Collector].
do(_Method, _State) ->
ok.
handle_message(force_event_refresh, State = #state{node = Node}) ->
rpc:call(Node, rabbit_event, notify,
[connection_created, connection_info(State)]),
{ok, State};
handle_message(closing_timeout, State = #state{closing_reason = Reason}) ->
{stop, {closing_timeout, Reason}, State};
handle_message(Msg, State) ->
{stop, {unexpected_msg, Msg}, State}.
closing(_ChannelCloseType, Reason, State) ->
{ok, State#state{closing_reason = Reason}}.
channels_terminated(State = #state{closing_reason = Reason,
collector = Collector}) ->
rabbit_queue_collector:delete_all(Collector),
{stop, {shutdown, Reason}, State}.
terminate(_Reason, #state{node = Node}) ->
rpc:call(Node, rabbit_direct, disconnect, [self(), [{pid, self()}]]),
ok.
i(type, _State) -> direct;
i(pid, _State) -> self();
%% AMQP Params
i(user, #state{params=#amqp_params_direct{username=#user{username=U}}}) -> U;
i(user, #state{params=#amqp_params_direct{username=U}}) -> U;
i(vhost, #state{params = P}) -> P#amqp_params_direct.virtual_host;
i(client_properties, #state{params = P}) ->
P#amqp_params_direct.client_properties;
%% Optional adapter info
i(protocol, #state{adapter_info = I}) -> I#amqp_adapter_info.protocol;
i(host, #state{adapter_info = I}) -> I#amqp_adapter_info.host;
i(port, #state{adapter_info = I}) -> I#amqp_adapter_info.port;
i(peer_host, #state{adapter_info = I}) -> I#amqp_adapter_info.peer_host;
i(peer_port, #state{adapter_info = I}) -> I#amqp_adapter_info.peer_port;
i(name, #state{adapter_info = I}) -> I#amqp_adapter_info.name;
i(Item, _State) -> throw({bad_argument, Item}).
info_keys() ->
?INFO_KEYS.
infos(Items, State) ->
[{Item, i(Item, State)} || Item <- Items].
connection_info(State = #state{adapter_info = I}) ->
infos(?CREATION_EVENT_KEYS, State) ++ I#amqp_adapter_info.additional_info.
connect(Params = #amqp_params_direct{username = Username,
password = Password,
node = Node,
adapter_info = Info,
virtual_host = VHost},
SIF, _ChMgr, State) ->
State1 = State#state{node = Node,
vhost = VHost,
params = Params,
adapter_info = ensure_adapter_info(Info)},
AuthToken = case Password of
none -> Username;
_ -> {Username, Password}
end,
case rpc:call(Node, rabbit_direct, connect,
[AuthToken, VHost, ?PROTOCOL, self(),
connection_info(State1)]) of
{ok, {User, ServerProperties}} ->
{ok, Collector} = SIF(),
State2 = State1#state{user = User,
collector = Collector},
{ok, {ServerProperties, 0, State2}};
{error, _} = E ->
E;
{badrpc, nodedown} ->
{error, {nodedown, Node}}
end.
ensure_adapter_info(none) ->
ensure_adapter_info(#amqp_adapter_info{});
ensure_adapter_info(A = #amqp_adapter_info{protocol = unknown}) ->
ensure_adapter_info(A#amqp_adapter_info{
protocol = {'Direct', ?PROTOCOL:version()}});
ensure_adapter_info(A = #amqp_adapter_info{name = unknown}) ->
Name = list_to_binary(rabbit_misc:pid_to_string(self())),
ensure_adapter_info(A#amqp_adapter_info{name = Name});
ensure_adapter_info(Info) -> Info.