RabbitMQ之WorkQueue模式

概念

简单例子

其实和简单入手的例子几乎差不多 我们先创建好work_queues队列

编写两个消费者类等待消费

public class WorkConsumer {
    public static void main(String[] args) {
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("192.168.198.129");
        connectionFactory.setPort(5672);
        connectionFactory.setUsername("admin");
        connectionFactory.setPassword("admin");
        connectionFactory.setVirtualHost("/");
        Connection connection = null;
        Channel channel = null;
        try {
            //创建连接
            connection = connectionFactory.newConnection("消费者");
            //获取通道
            channel = connection.createChannel();
            //通过通道声明队列,创建交换机等一系列事情
            channel.basicConsume("work_queues", true, new DeliverCallback() {
                @Override
                public void handle(String s, Delivery delivery) throws IOException {
                    System.out.println("收到消息为" + new String(delivery.getBody(), "UTF-8"));
                }
            }, new CancelCallback() {
                @Override
                public void handle(String s) throws IOException {
                    System.out.println("收取消息失败");
                }
            });
            //卡一下
            System.out.println("键盘输入关闭消费者");
            System.in.read();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (TimeoutException e) {
            e.printStackTrace();
        }
        finally {
            //关闭通道
            if(channel != null && channel.isOpen()){
                try {
                    channel.close();
                }
                catch (Exception e){
                    e.printStackTrace();
                }
            }

            if(connection != null && connection.isOpen()){
                try {
                    connection.close();
                }
                catch (Exception e){
                    e.printStackTrace();
                }
            }
        }
    }
}

再写一个代码完全一致的类运行 即出现两个消费者

编写生产者类 生产一定数量的消息

public class WorkProducer {
    public static void main(String[] args) {
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("192.168.198.129");
        connectionFactory.setPort(5672);
        connectionFactory.setUsername("admin");
        connectionFactory.setPassword("admin");
        connectionFactory.setVirtualHost("/");
        Connection connection = null;
        Channel channel = null;
        try {
            //创建连接
            connection = connectionFactory.newConnection("生产者");
            //获取通道
            channel = connection.createChannel();
            //通过通道声明队列,创建交换机等一系列事情
            String queueName = "work_queues";
            //参数:队列名字 是否持久化 是否独自 是否自动删除 参数
            channel.queueDeclare(queueName,false,false,false,null);
            for (int i = 0; i < 10; i++) {
                String message = i+"Hello rabbitmq";
                channel.basicPublish("",queueName,null,message.getBytes());
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (TimeoutException e) {
            e.printStackTrace();
        }
        finally {
            //关闭通道
            if(channel != null && channel.isOpen()){
                try {
                    channel.close();
                }
                catch (Exception e){
                    e.printStackTrace();
                }
            }

            if(connection != null && connection.isOpen()){
                try {
                    connection.close();
                }
                catch (Exception e){
                    e.printStackTrace();
                }
            }
        }
    }
}

先运行两个消费者 然后运行生产者
可以看到生产的消息被两个消费者大致平均的取走了