Mac下RabbitMQ安装和在Java client端的使用

安装：

1.使用homebrew下载rabbitMQ:

brew install rabbitmq

执行结果如下：

Updating Homebrew...
==> Auto-updated Homebrew!
Updated 1 tap (homebrew/core).
==> Updated Formulae
cake                dockviz             kubeless            sdcc
==> Renamed Formulae
geth -> ethereum

Error: Could not link:
/usr/local/share/doc/homebrew

Please delete these paths and run `brew update`.
==> Installing dependencies for rabbitmq: jpeg, libpng, libtiff, wxmac, erlang
==> Installing rabbitmq dependency: jpeg
==> Downloading https://homebrew.bintray.com/bottles/jpeg-9c.high_sierra.bottle.
######################################################################## 100.0%
==> Pouring jpeg-9c.high_sierra.bottle.tar.gz
🍺  /usr/local/Cellar/jpeg/9c: 21 files, 724.5KB
==> Installing rabbitmq dependency: libpng
==> Downloading https://homebrew.bintray.com/bottles/libpng-1.6.34.high_sierra.b
######################################################################## 100.0%
==> Pouring libpng-1.6.34.high_sierra.bottle.tar.gz
🍺  /usr/local/Cellar/libpng/1.6.34: 26 files, 1.2MB
==> Installing rabbitmq dependency: libtiff
==> Downloading https://homebrew.bintray.com/bottles/libtiff-4.0.9_3.high_sierra
######################################################################## 100.0%
==> Pouring libtiff-4.0.9_3.high_sierra.bottle.tar.gz
🍺  /usr/local/Cellar/libtiff/4.0.9_3: 246 files, 3.5MB
==> Installing rabbitmq dependency: wxmac
==> Downloading https://homebrew.bintray.com/bottles/wxmac-3.0.4.high_sierra.bot
######################################################################## 100.0%
==> Pouring wxmac-3.0.4.high_sierra.bottle.tar.gz
🍺  /usr/local/Cellar/wxmac/3.0.4: 810 files, 23.7MB
==> Installing rabbitmq dependency: erlang
==> Downloading https://homebrew.bintray.com/bottles/erlang-20.3.2.high_sierra.b
######################################################################## 100.0%
==> Pouring erlang-20.3.2.high_sierra.bottle.tar.gz
==> Caveats
Man pages can be found in:
  /usr/local/opt/erlang/lib/erlang/man

Access them with `erl -man`, or add this directory to MANPATH.
==> Summary
🍺  /usr/local/Cellar/erlang/20.3.2: 7,036 files, 277.4MB
==> Installing rabbitmq
==> Downloading https://dl.bintray.com/rabbitmq/all/rabbitmq-server/3.7.4/rabbit
######################################################################## 100.0%
==> /usr/bin/unzip -qq -j /usr/local/Cellar/rabbitmq/3.7.4/plugins/rabbitmq_mana
==> Caveats
Management Plugin enabled by default at http://localhost:15672

Bash completion has been installed to:
  /usr/local/etc/bash_completion.d

To have launchd start rabbitmq now and restart at login:
  brew services start rabbitmq
Or, if you don't want/need a background service you can just run:
  rabbitmq-server
==> Summary
🍺  /usr/local/Cellar/rabbitmq/3.7.4: 232 files, 12.6MB, built in 16 seconds

rabbitMQ安装路径： /usr/local/Cellar/rabbitmq/3.7.4

2. 进入到安装路径下，执行命令启动rabbitMQ服务：

sbin/rabbitmq-server 

3. 然后另开终端，启动rabbitMQ的管理插件：

cd sbin && ./rabbitmq-plugins enable rabbitmq_management

4. 输入地址localhost:15672即可看到rabbitMQ管理界面

 

Java client端的使用：

在RabbitMQ的管理界面中添加一个QUEUE，name：demo，其他选项默认即可。

引入包：

<dependency>
            <groupId>com.rabbitmq</groupId>
            <artifactId>amqp-client</artifactId>
</dependency>

根据rabbitMQ官网所示，编写发送端与接收端：

1.sender：

public class Send {
    private static final String QUEUE_NAME = "demo";

    public static void main(String[] args) throws IOException, TimeoutException, NoSuchAlgorithmException, KeyManagementException, URISyntaxException {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("127.0.0.1");
        factory.setPort(5672);
        factory.setUsername("admin");
        factory.setPassword("admin");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();
        channel.queueDeclare(QUEUE_NAME, true, false, false, null);

        String message = "Hello World!";
        channel.basicPublish("", QUEUE_NAME, null, message.getBytes());
        System.out.println( " [x] send '" + message + "'");
        channel.close();
        connection.close();
    }
}

2. receiver:

public class Receive {
    private static final String QUEUE_NAME = "demo";

    public static void main(String[] args) throws IOException, TimeoutException {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("127.0.0.1");
        factory.setPort(5672);
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        channel.queueDeclare(QUEUE_NAME, true, false, false, null);
        System.out.println( " [*] Waiting for message. To exit press CTRL+C");

        Consumer consumer = new DefaultConsumer(channel) {

            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                String message = new String(body, "UTF-8");
                System.out.println(" [x] Received '" + message + "'");
            }
        };
        channel.basicConsume(QUEUE_NAME, true, consumer);
    }
}

3.在启动发送端和接收端时，可能会遇到这个问题：java.util.concurrent.TimeoutException

解决方案：（参考文档：http://docs.celeryproject.org/en/latest/getting-started/brokers/rabbitmq.html）

修改hosts文件，在127.0.0.1　　localhost后面加上　　hostname　　hostname.local，如下所示：

127.0.0.1       localhost       miaoying-MacBookPro     miaoying-MacBookPro.local