尚硅谷ActiveMQ学习笔记（5）-- ActiveMQ的消息存储与持久化

深碍√TFBOYSˉ_ 2022-11-18 01:26 242阅读 0赞

### 一、官网 ###

http://activemq.apache.org/persistence

### 二、是什么 ###

#### 1、面试题 ####

ActiveMQ持久化机制

#### 2、说明 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70]  
一句话，MQ服务器宕机，消息不会丢失的机制  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 1]

### 三、有哪些 ###

#### 1、KahaDB 消息存储（默认） ####

迷你版的文件数据库

##### ①、基于日志文件，从ActiveMQ5.4开始默认的持久化插件 #####

##### ②、官网 #####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 2]  
kahaDB官网  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 3]

##### ③、验证 #####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 4]

##### ④、说明 #####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 5]  
http://activemq.apache.org/kahadb

##### ⑤、kahaDB的存储原理 #####

#### 2、JDBC 消息存储 ####

消息基于JDBC存储的

#### 3、LevelDB消息存储（了解） ####

#### 4、JDBC Message store with ActiveMQ Journal ####

### 四、JDBC消息存储 ###

#### 1、MQ+Mysql ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 6]

#### 2、添加mysql数据库的驱动包到lib文件夹 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 7]

#### 3、jdbcPersistanceAdapter配置 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 8]  
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#### 4、数据库连接池配置 ####

注意要和上面的引用ID一致

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 10]  
![在这里插入图片描述][20210412000720609.png]

#### 5、建库建表说明 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 11]  
activemq\_msgs  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 12]  
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activemq\_acks  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 14]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 15]  
activemq\_lock  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 16]

#### 6、代码运行验证 ####

##### ①、一定要开启持久化 #####

producer.setDeliveryMode(DeliveryMode.PERSISTENT);

##### ②、队列 #####

生产者

package com.atguigu.activemq.queue;
    
    import org.apache.activemq.ActiveMQConnectionFactory;
    
    import javax.jms.*;
    
    /** * @ClassName JmsProduce * @Description TODO * @Author DuanYueFeng * @Version 1.0 **/
    public class JmsProduce { 
        public static final String URL = "tcp://10.112.70.211:61616";
        public static final String queue_name = "topic_p_mysql";
    
        public static void main(String[] args) throws JMSException { 
            ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(URL);
            Connection connection = factory.createConnection();
    
            Session session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE);
            Queue queue = session.createQueue(queue_name);
            MessageProducer producer = session.createProducer(queue);
            producer.setDeliveryMode(DeliveryMode.PERSISTENT);
            connection.start();
    
            for (int i = 1; i < 3; i++) { 
                TextMessage textMessage = session.createTextMessage("mag2..." + i);
                producer.send(textMessage);
            }
            producer.close();
    // session.commit();
            session.close();
            connection.close();
            System.out.println("....");
        }
    }

消费者

package com.atguigu.activemq.queue;
    
    import org.apache.activemq.ActiveMQConnectionFactory;
    
    import javax.jms.*;
    import java.io.IOException;
    
    /** * @ClassName JmsConsumer * @Description TODO * @Author DuanYueFeng * @Version 1.0 **/
    public class JmsConsumer { 
        public static final String URL = "tcp://10.112.70.211:61616";
        public static final String queue_name = "topic_p_mysql";
    
        public static void main(String[] args) throws JMSException, IOException, InterruptedException { 
            ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(URL);
            Connection connection = factory.createConnection();
            connection.start();
    
            Session session = connection.createSession(false,Session.DUPS_OK_ACKNOWLEDGE);
            Queue queue = session.createQueue(queue_name);
            MessageConsumer consumer = session.createConsumer(queue);
            while (true){ 
                TextMessage receive = (TextMessage) consumer.receive(1000);
                if (null != receive){ 
                    System.out.println("消息:"+receive.getText());
                }
                else { 
                    System.out.println("结束");
                    break;
                }
            }
    
    // System.in.read();
    // Thread.sleep(1000);
            consumer.close();
    // session.commit();
            session.close();
            connection.close();
            System.out.println("完成....");
        }
    }

##### ③、topic #####

生产者

package com.atguigu.activemq.topic;
    
    import org.apache.activemq.ActiveMQConnectionFactory;
    
    import javax.jms.*;
    
    /** * @ClassName JmsProduce * @Description TODO * @Author DuanYueFeng * @Version 1.0 **/
    public class JmsProduce_Topic_p { 
        public static final String URL = "tcp://10.112.70.211:61616";
        public static final String topic_name = "topic_p_mysql";
    
        public static void main(String[] args) throws JMSException { 
            ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(URL);
            Connection connection = factory.createConnection();
    
            Session session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE);
            Topic topic = session.createTopic(topic_name);
            MessageProducer producer = session.createProducer(topic);
            producer.setDeliveryMode(DeliveryMode.PERSISTENT);
            connection.start();
    
            for (int i = 4; i <=6; i++) { 
                TextMessage textMessage = session.createTextMessage("Topic mag..." + i);
                producer.send(textMessage);
            }
            producer.close();
            session.close();
            connection.close();
            System.out.println("完成....");
        }
    }

消费者

package com.atguigu.activemq.topic;
    
    import org.apache.activemq.ActiveMQConnectionFactory;
    import org.apache.camel.component.test.TestComponent;
    
    import javax.jms.*;
    import java.io.IOException;
    
    /** * @ClassName JmsConsumer * @Description TODO * @Author DuanYueFeng * @Version 1.0 **/
    public class JmsConsumer_Topic_p { 
        public static final String URL = "tcp://10.112.70.211:61616";
        public static final String topic_name = "topic_p_mysql";
    
        public static void main(String[] args) throws JMSException, IOException, InterruptedException { 
            System.out.println("我是3号消费者。。。");
            ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(URL);
            Connection connection = factory.createConnection();
            connection.setClientID("z3");
            Session session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE);
            Topic topic = session.createTopic(topic_name);
            TopicSubscriber durableSubscriber = session.createDurableSubscriber(topic, "remark..");
    
            connection.start();
    
            Message message = durableSubscriber.receive();
    
            while (null!=message){ 
                TextMessage textMessage = (TextMessage)message;
                System.out.println("收到的持久化："+textMessage.getText());
                message = durableSubscriber.receive(1000L);
            }
    
    // Thread.sleep(1000);
            session.close();
            connection.close();
            System.out.println("完成....");
        }
    }

#### 7、数据库情况 ####

#### 8、小总结 ####

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#### 9、开发有坑 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 18]

### 五、JDBC Message store with ActiveMQ Journal ###

### 六、ActiveMQ持久化机制小总结 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 19]  
![在这里插入图片描述][20210412001357911.png]

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