Merge remote-tracking branch 'remotes/janimo/erlang'

erlang/README.md

@@ -42,3 +42,13 @@ You need Erlang Client binaries:
 
     ./receive_logs.erl
     ./emit_log.erl "info: This is the log message"
+
+[Tutorial four: Routing](http://www.rabbitmq.com/tutorial-four-python.html):
+
+    ./receive_logs_direct.erl info
+    ./emit_log_direct.py info Hello
+
+[Tutorial five: Topics](http://www.rabbitmq.com/tutorial-five-python.html):
+
+    ./receive_logs_topic.erl *.rabbit
+    ./emit_log_topic.erl red.rabbit Hello

erlang/emit_log_direct.erl

@@ -0,0 +1,27 @@
+#!/usr/bin/env escript
+%%! -pz ./amqp_client ./rabbit_common ./amqp_client/ebin ./rabbit_common/ebin
+
+-include_lib("amqp_client/include/amqp_client.hrl").
+
+main(Argv) ->
+    {ok, Connection} =
+        amqp_connection:start(#amqp_params_network{host = "localhost"}),
+    {ok, Channel} = amqp_connection:open_channel(Connection),
+
+    amqp_channel:call(Channel, #'exchange.declare'{exchange = <<"direct_logs">>,
+                                                   type = <<"direct">>}),
+
+    {Severity, Message} = case Argv of
+           [] -> {<<"info">>, <<"Hello World!">>};
+           [S] -> {list_to_binary(S), <<"Hello World!">>};
+           [S | Msg] -> {list_to_binary(S), list_to_binary(string:join(Msg, " "))}
+          end,
+    amqp_channel:cast(Channel,
+                      #'basic.publish'{
+                          exchange = <<"direct_logs">>,
+                          routing_key = Severity},
+                      #amqp_msg{payload = Message}),
+    io:format(" [x] Sent ~p:~p~n", [Severity, Message]),
+    ok = amqp_channel:close(Channel),
+    ok = amqp_connection:close(Connection),
+    ok.

erlang/emit_log_topic.erl

@@ -0,0 +1,27 @@
+#!/usr/bin/env escript
+%%! -pz ./amqp_client ./rabbit_common ./amqp_client/ebin ./rabbit_common/ebin
+
+-include_lib("amqp_client/include/amqp_client.hrl").
+
+main(Argv) ->
+    {ok, Connection} =
+        amqp_connection:start(#amqp_params_network{host = "localhost"}),
+    {ok, Channel} = amqp_connection:open_channel(Connection),
+
+    amqp_channel:call(Channel, #'exchange.declare'{exchange = <<"topic_logs">>,
+                                                   type = <<"topic">>}),
+
+    {RoutingKey, Message} = case Argv of
+           [] -> {<<"anonymous.info">>, <<"Hello World!">>};
+           [R] -> {list_to_binary(R), <<"Hello World!">>};
+           [R | Msg] -> {list_to_binary(R), list_to_binary(string:join(Msg, " "))}
+          end,
+    amqp_channel:cast(Channel,
+                      #'basic.publish'{
+                          exchange = <<"topic_logs">>,
+                          routing_key = RoutingKey},
+                      #amqp_msg{payload = Message}),
+    io:format(" [x] Sent ~p:~p~n", [RoutingKey, Message]),
+    ok = amqp_channel:close(Channel),
+    ok = amqp_connection:close(Connection),
+    ok.

erlang/receive_logs_direct.erl

@@ -0,0 +1,37 @@
+#!/usr/bin/env escript
+%%! -pz ./amqp_client ./rabbit_common ./amqp_client/ebin ./rabbit_common/ebin
+
+-include_lib("amqp_client/include/amqp_client.hrl").
+
+main(Argv) ->
+    {ok, Connection} =
+        amqp_connection:start(#amqp_params_network{host = "localhost"}),
+    {ok, Channel} = amqp_connection:open_channel(Connection),
+
+    amqp_channel:call(Channel, #'exchange.declare'{exchange = <<"direct_logs">>,
+                                                   type = <<"direct">>}),
+
+    #'queue.declare_ok'{queue = Queue} =
+        amqp_channel:call(Channel, #'queue.declare'{exclusive = true}),
+
+    lists:foreach(fun(S) ->
+                    amqp_channel:call(Channel, #'queue.bind'{exchange = <<"direct_logs">>,
+                                                             routing_key = list_to_binary(S),
+                                                             queue = Queue})
+                  end, Argv),
+
+    io:format(" [*] Waiting for logs. To exit press CTRL+C~n"),
+
+    amqp_channel:subscribe(Channel, #'basic.consume'{queue = Queue,
+                                                     no_ack = true}, self()),
+    receive
+        #'basic.consume_ok'{} -> ok
+    end,
+    loop(Channel).
+
+loop(Channel) ->
+    receive
+        {#'basic.deliver'{routing_key=RoutingKey}, #amqp_msg{payload = Body}} ->
+            io:format(" [x] ~p:~p~n", [RoutingKey, Body]),
+            loop(Channel)
+    end.

erlang/receive_logs_topic.erl

@@ -0,0 +1,37 @@
+#!/usr/bin/env escript
+%%! -pz ./amqp_client ./rabbit_common ./amqp_client/ebin ./rabbit_common/ebin
+
+-include_lib("amqp_client/include/amqp_client.hrl").
+
+main(Argv) ->
+    {ok, Connection} =
+        amqp_connection:start(#amqp_params_network{host = "localhost"}),
+    {ok, Channel} = amqp_connection:open_channel(Connection),
+
+    amqp_channel:call(Channel, #'exchange.declare'{exchange = <<"topic_logs">>,
+                                                   type = <<"topic">>}),
+
+    #'queue.declare_ok'{queue = Queue} =
+        amqp_channel:call(Channel, #'queue.declare'{exclusive = true}),
+
+    lists:foreach(fun(R) ->
+                    amqp_channel:call(Channel, #'queue.bind'{exchange = <<"topic_logs">>,
+                                                             routing_key = list_to_binary(R),
+                                                             queue = Queue})
+                  end, Argv),
+
+    io:format(" [*] Waiting for logs. To exit press CTRL+C~n"),
+
+    amqp_channel:subscribe(Channel, #'basic.consume'{queue = Queue,
+                                                     no_ack = true}, self()),
+    receive
+        #'basic.consume_ok'{} -> ok
+    end,
+    loop(Channel).
+
+loop(Channel) ->
+    receive
+        {#'basic.deliver'{routing_key=RoutingKey}, #amqp_msg{payload = Body}} ->
+            io:format(" [x] ~p:~p~n", [RoutingKey, Body]),
+            loop(Channel)
+    end.