RabbitMQ之入门HelloWorld(Erlang)

来源：互联网发布：手机版淘宝客编辑：程序博客网时间：2024/06/06 07:43

RabbitMQ是一些概念、安装、一键实现这个简单的HelloWorld程序的步骤和可能遇到的问题这里都不讲了，有疑问的可以看看这篇文章。这里主要是用Erlang来实现这个简单程序。RabbitMQ的Erlang库可以从这里下载，下载解压后直接在linux下make一下就OK了。

make过程中会自己下载一些依赖库，都在deps下。这些依赖库都是以application的方式运行的，所以我们只要运行amqp_client:start().就可以启动整个client程序了。

好了，废话不多说了，直接上代码！！

消费者：

-module(mod_receive).-behaviour(gen_server).-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]).-export([start_link/0]).-include("common.hrl").-record(state, {}).-define(SERVER,hello_receiver).start_link() ->gen_server:start_link({local,?SERVER}, ?MODULE, [], []).init([]) ->start(),    {ok, #state{}}.handle_call(_Request, _From, State) ->    Reply = ok,    {reply, Reply, State}.handle_cast(_Msg, State) ->    {noreply, State}.handle_info({'basic.consume_ok',_}, State) ->{noreply, State};handle_info({#'basic.deliver'{},#amqp_msg{payload=Msg}}, State) ->io:format(" receive  messages is ~p~n",[Msg]),{noreply, State};handle_info(Info, State) ->io:format("unknown messages is ~p~n", [Info]),    {noreply, State}.terminate(_Reason, _State) ->    ok.code_change(_OldVsn, State, _Extra) ->    {ok, State}.start() ->Params = #amqp_params_network{host=?HOST,username=?USER_NAME,password=?PASSWORD},case amqp_connection:start(Params) of{ok,ConnectionPid} ->{ok, Channel} = amqp_connection:open_channel(ConnectionPid),amqp_channel:call(Channel, #'queue.declare'{queue = <<"hello">>}),io:format(" Waiting for messages......~n"),amqp_channel:subscribe(Channel, #'basic.consume'{queue = <<"hello">>,no_ack = true}, self());{error,Resaon} ->Resaonend.

生产者：

-module(mod_send).-export([send/0]).-include("common.hrl").send() ->Params = #amqp_params_network{host=?HOST,username=?USER_NAME,password=?PASSWORD},case amqp_connection:start(Params) of{ok,ConnectionPid} ->{ok, Channel} = amqp_connection:open_channel(ConnectionPid),amqp_channel:call(Channel, #'queue.declare'{queue = <<"hello">>}),amqp_channel:cast(Channel,  #'basic.publish'{   exchange = <<"">>,   routing_key = <<"hello">>},  #amqp_msg{payload = <<"Hello World!">>}),io:format("Sent 'Hello World!'~n"),ok = amqp_channel:close(Channel),ok = amqp_connection:close(ConnectionPid),ok;{error,Reason} ->Reasonend.

common头文件：

-include("amqp_client_internal.hrl").-define(USER_NAME , <<"test">>).-define(PASSWORD , <<"test">>).-define(HOST , "192.168.249.128").-define(PORT , 5672).

运行结果：

祝生活愉快！！！

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