ActiveMQ学习系列(四)----消息持久化到mysql
前记:目前学习还比较杂乱,还未找到系统化地学习ActiveMq的方法。在网上看到消息持久化的demo,了解了一下,在此记录。
一、目前ActiveMq支持的持久化方法
url:http://activemq.apache.org/persistence.html
3、KahaDB
4、JDBC 配合其自带的 high performance journal;根据官方说法,它内置的高性能journal的工作类似于在缓存层工作,消息会优先写入到journal,后台的定时任务会每隔一段时间间隔去
查看需要写入到jdbc的消息。
二、配置activemq.xml
1、修改persistenceAdapter
<persistenceAdapter>
<!-- <kahaDB directory="${activemq.data}/kahadb"/>-->
<jdbcPersistenceAdapter dataSource="#my-ds"/>
</persistenceAdapter>
上面我们注释了默认的kahadb,添加了jdbc数据源。
2、增加数据源
<bean id="my-ds" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://192.168.2.140:3306/activemq?characterEncoding=utf-8" />
<property name="username" value="root" />
<property name="password" value="" />
<property name="initialSize" value="" />
<property name="maxTotal" value="" />
<property name="maxIdle" value="" />
<property name="maxWaitMillis" value="" />
<property name="minIdle" value="" />
</bean>
这边有几个注意点:
2.1:上面配置的数据源类对应于dbcp2,如果1.x系列的jar包会报错,classNotFound异常。
2.2:在主安装目录的lib目录下,将mysql的jar包、dbcp的jar包放到该路径下
/usr/local/apache-activemq-5.14./lib
2.3:建议用bin/activemq console方式启动,可以及时查看错误信息。我在启动时,报以下错误:
WARN | Failure Details: Table 'xckk_star_act.ACTIVEMQ_ACKS' doesn't exist
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'xckk_star_act.ACTIVEMQ_ACKS' doesn't exist
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)[:1.8.0_121]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)[:1.8.0_121]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)[:1.8.0_121]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)[:1.8.0_121]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:404)[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.Util.getInstance(Util.java:387)[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:939)[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3878)[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3814)[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2478)[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2625)[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2551)[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1861)[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2073)[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2009)[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.PreparedStatement.executeLargeUpdate(PreparedStatement.java:5094)[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1994)[mysql-connector-java-5.1.38.jar:5.1.38]
at org.apache.commons.dbcp2.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:98)[commons-dbcp2-2.1.1.jar:2.1.1]
at org.apache.commons.dbcp2.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:98)[commons-dbcp2-2.1.1.jar:2.1.1]
at org.apache.activemq.store.jdbc.adapter.DefaultJDBCAdapter.doDeleteOldMessages(DefaultJDBCAdapter.java:832)[activemq-jdbc-store-5.14.4.jar:5.14.4]
at org.apache.activemq.store.jdbc.JDBCPersistenceAdapter.cleanup(JDBCPersistenceAdapter.java:349)[activemq-jdbc-store-5.14.4.jar:5.14.4]
at org.apache.activemq.store.jdbc.JDBCPersistenceAdapter$3.run(JDBCPersistenceAdapter.java:327)[activemq-jdbc-store-5.14.4.jar:5.14.4]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[:1.8.0_121]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)[:1.8.0_121]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)[:1.8.0_121]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)[:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_121]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_121]
在网上查询结果,原来是数据库需要字符集设置为latin1.
于是,新建了一个数据库,字符集设为Latin1.然后启动ActiveMq,查看数据库,发现多了三张表:
在这边将结构导出来,供手动建表:
/*
SQLyog v10.2
MySQL - 5.1.71 : Database - activemq
*********************************************************************
*/ /*!40101 SET NAMES utf8 */; /*!40101 SET SQL_MODE=''*/; /*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
CREATE DATABASE /*!32312 IF NOT EXISTS*/`activemq` /*!40100 DEFAULT CHARACTER SET latin1 COLLATE latin1_bin */; USE `activemq`; /*Table structure for table `ACTIVEMQ_ACKS` */ DROP TABLE IF EXISTS `ACTIVEMQ_ACKS`; CREATE TABLE `ACTIVEMQ_ACKS` (
`CONTAINER` varchar(250) COLLATE latin1_bin NOT NULL,
`SUB_DEST` varchar(250) COLLATE latin1_bin DEFAULT NULL,
`CLIENT_ID` varchar(250) COLLATE latin1_bin NOT NULL,
`SUB_NAME` varchar(250) COLLATE latin1_bin NOT NULL,
`SELECTOR` varchar(250) COLLATE latin1_bin DEFAULT NULL,
`LAST_ACKED_ID` bigint(20) DEFAULT NULL,
`PRIORITY` bigint(20) NOT NULL DEFAULT '',
`XID` varchar(250) COLLATE latin1_bin DEFAULT NULL,
PRIMARY KEY (`CONTAINER`,`CLIENT_ID`,`SUB_NAME`,`PRIORITY`),
KEY `ACTIVEMQ_ACKS_XIDX` (`XID`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_bin; /*Table structure for table `ACTIVEMQ_LOCK` */ DROP TABLE IF EXISTS `ACTIVEMQ_LOCK`; CREATE TABLE `ACTIVEMQ_LOCK` (
`ID` bigint(20) NOT NULL,
`TIME` bigint(20) DEFAULT NULL,
`BROKER_NAME` varchar(250) COLLATE latin1_bin DEFAULT NULL,
PRIMARY KEY (`ID`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_bin; /*Table structure for table `ACTIVEMQ_MSGS` */ DROP TABLE IF EXISTS `ACTIVEMQ_MSGS`; CREATE TABLE `ACTIVEMQ_MSGS` (
`ID` bigint(20) NOT NULL,
`CONTAINER` varchar(250) COLLATE latin1_bin DEFAULT NULL,
`MSGID_PROD` varchar(250) COLLATE latin1_bin DEFAULT NULL,
`MSGID_SEQ` bigint(20) DEFAULT NULL,
`EXPIRATION` bigint(20) DEFAULT NULL,
`MSG` longblob,
`PRIORITY` bigint(20) DEFAULT NULL,
`XID` varchar(250) COLLATE latin1_bin DEFAULT NULL,
PRIMARY KEY (`ID`),
KEY `ACTIVEMQ_MSGS_MIDX` (`MSGID_PROD`,`MSGID_SEQ`),
KEY `ACTIVEMQ_MSGS_CIDX` (`CONTAINER`),
KEY `ACTIVEMQ_MSGS_EIDX` (`EXPIRATION`),
KEY `ACTIVEMQ_MSGS_PIDX` (`PRIORITY`),
KEY `ACTIVEMQ_MSGS_XIDX` (`XID`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_bin; /*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
三、测试消息持久化
package com.ckl.activemq; import org.apache.activemq.ActiveMQConnectionFactory; import javax.jms.*; public class HelloActiveMQ {
public static void main(String[] args) throws Exception {
HelloWorldProducer producer = new HelloWorldProducer();
HelloWorldConsumer consumer = new HelloWorldConsumer(); Thread threadProducer = new Thread(producer);
threadProducer.start();
//注释掉消费者,不然的话,马上消费者马上把消息消费了,来不及持久化
// Thread threadConsumer = new Thread(consumer);
// threadConsumer.start();
} public static class HelloWorldProducer implements Runnable {
public void run() {
try {
// Create a ConnectionFactory
ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://192.168.2.140:61616"); // Create a Connection
Connection connection = connectionFactory.createConnection();
connection.start(); // Create a Session
Session session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE); // Create the destination (Topic or Queue)
Destination destination = session.createQueue("DemoQueue"); // Create a MessageProducer from the Session to the Topic or Queue
MessageProducer producer = session.createProducer(destination);
// producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
producer.setDeliveryMode(DeliveryMode.PERSISTENT);//消息需要持久化 // Create a messages
String text = "Hello world! From: " + Thread.currentThread().getName() + " : " + this.hashCode();
TextMessage message = session.createTextMessage(text); // Tell the producer to send the message
System.out.println("Sent message: " + message.hashCode() + " : " + Thread.currentThread().getName());
producer.send(message); // Clean up
session.close();
connection.close();
} catch (Exception e) {
System.out.println("Caught: " + e);
e.printStackTrace();
}
}
}
public static class HelloWorldConsumer implements Runnable, ExceptionListener {
public void run() {
try {
// Create a ConnectionFactory
ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(
"tcp://192.168.2.140:61616");
// Create a Connection
Connection connection = connectionFactory.createConnection();
connection.start();
connection.setExceptionListener(this);
// Create a Session
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
// Create the destination (Topic or Queue)
Destination destination = session.createQueue("DemoQueue");
// Create a MessageConsumer from the Session to the Topic or
// Queue
MessageConsumer consumer = session.createConsumer(destination);
// Wait for a message
Message message = consumer.receive(1000);
if (message instanceof TextMessage) {
TextMessage textMessage = (TextMessage) message;
String text = textMessage.getText();
System.out.println("Received: " + text);
} else {
System.out.println("Received: " + message);
}
consumer.close();
session.close();
connection.close();
} catch (Exception e) {
System.out.println("Caught: " + e);
e.printStackTrace();
}
} public synchronized void onException(JMSException ex) {
System.out.println("JMS Exception occured. Shutting down client.");
}
}
}
运行后,效果如下:
四、单独启动消费者,查看数据库
注释掉上面的生产者,单独启动消费者后,发现数据库中的消息已被消费。
五、备注
Although the JDBC Store does not offer the best performance, it makes fairly simple to create a simple Master-Slave robust broker setup.
When a group of Active MQ brokers is configured to use a shared database, they’ll all try to connect and grab a lock in the lock table,
but only one will succeed and become the master. The remaining brokers will be slaves, and will be in a wait state, not accepting client
connections until the master fails.
The lock table, is ACTIVEMQ_LOCK , and it is used to ensure that only one Active MQ broker instance can access the database at one time.
If an Active MQ broker can’t grab the database lock, that broker won’t initialize fully, and will wait until the lock becomes free, or it’s shut down.
看到一段资料补充下,涉及到ActiveMq配置为主从模式时,都会去尝试连接该数据源,为了防止资源争用出现的问题,加了ACTIVEMQ_LOCK表。
欢迎留言交流。
ActiveMQ学习系列(四)----消息持久化到mysql的更多相关文章
- ActiveMQ的几种消息持久化机制
为了避免意外宕机以后丢失信息,需要做到重启后可以恢复消息队列,消息系统一般都会采用持久化机制. ActiveMQ的消息持久化机制有JDBC,AMQ,KahaDB和LevelDB,无论使用哪种持久化方式 ...
- scrapy爬虫学习系列四:portia的学习入门
系列文章列表: scrapy爬虫学习系列一:scrapy爬虫环境的准备: http://www.cnblogs.com/zhaojiedi1992/p/zhaojiedi_python_00 ...
- DocX开源WORD操作组件的学习系列四
DocX学习系列 DocX开源WORD操作组件的学习系列一 : http://www.cnblogs.com/zhaojiedi1992/p/zhaojiedi_sharp_001_docx1.htm ...
- .net reactor 学习系列(四)---.net reactor应用场景
原文:.net reactor 学习系列(四)---.net reactor应用场景 前面已经学习了.net reactor一些基础知识,现在准备学习下实际的应用场景,只是简单的保护和 ...
- ActiveMQ消息持久化到Mysql数据库
1.把连接MySQL数据库的jar文件,放到ActiveMQ的lib目录下 2.修改ActiveMQ的conf目录下的activemq.xml文件,修改数据持久化的方式2.1 修改原来的kahadb的 ...
- ActiveMQ(3)---ActiveMQ原理分析之消息持久化
持久化消息和非持久化消息的存储原理 正常情况下,非持久化消息是存储在内存中的,持久化消息是存储在文件中的.能够存储的最大消息数据在${ActiveMQ_HOME}/conf/activemq.xml文 ...
- RabbitMQ学习系列四-EasyNetQ文档跟进式学习与实践
EasyNetQ文档跟进式学习与实践 https://www.cnblogs.com/DjlNet/p/7603554.html 这里可能有人要问了,为什么不使用官方的nuget包呐:RabbitMQ ...
- Identity Server4学习系列四之用户名密码获得访问令牌
1.简介 Identity Server4支持用户名密码模式,允许调用客户端使用用户名密码来获得访问Api资源(遵循Auth 2.0协议)的Access Token,MS可能考虑兼容老的系统,实现了这 ...
- RabbitMQ系列(四)--消息如何保证可靠性传输以及幂等性
一.消息如何保证可靠性传输 1.1.可能出现消息丢失的情况 1.Producer在把Message发送Broker的过程中,因为网络问题等发生丢失,或者Message到了Broker,但是出了问题,没 ...
随机推荐
- spring框架学习(三)junit单元测试
spring框架学习(三)junit单元测试 单元测试不是头一次听说了,但只是听说从来没有用过.一个模块怎么测试呢,是不是得专门为一单元写一个测试程序,然后将测试单元代码拿过来测试? 我是这么想的.学 ...
- eclipse调试找不到源解决办法
eclipse调试时有时显示找不到源码,首先得确定代码没问题 这是eclipse没有发现工程源码,解决办法是 右键工程>>Debug As >> Debug configura ...
- 时钟(AnalogClock和DigitalClock)的功能与用法
时钟UI组件是两个非常简单的组件,DigitalClock本身就继承了TextView——也就是说它本身就是文本框,只是它里面显示的内容总是当前时间.与TextView不同的是为DigitalCloc ...
- 使用AIR进行移动APP开发常见功能和问题(上)
1. 获取最近联系人 思路:侦听Geolocation的update事件,获取经度和纬度信息,再把坐标信息上传至服务器,服务器比较坐标信息算出距离,返回最近位置的若干个人. update时间在2种情 ...
- Prim和Kruskal最小生成树
标题: Prim和Kruskal最小生成树时 限: 2000 ms内存限制: 15000 K总时限: 3000 ms描述: 给出一个矩阵,要求以矩阵方式单步输出生成过程.要求先输出Prim生成过程,再 ...
- win10环境下python3.5安装步骤
点我去Python官网下载 往下翻几页就能看到各种版本的Python,当前最新的是Python3.6,也没多大区别,我选择的是3.5.2 64位的,点击download 根据自己的电脑配置,我选择的是 ...
- 常用js类型相互转换
数字转换为字符串 var a=200.21;document.write(a.toString(10)); 结果为:200.21以十进制转换 document.write(a.toFixed(3)) ...
- 深度理解微信小程序的思想
这篇文章不涉及小程序技术方面得问题,只讨论小程序的核心问题. 探讨一个问题最好的方法是问"为什么",这篇文章主要思路是通过回答以下几个问题来探讨微信小程序的"思想&quo ...
- php类与构造函数解析
关于类大家都有一定的认识这里只介绍在php中类值得注意的地方----类的创建----php使用关键字class创建一个类,并且使用一对大括号如: class name{ public $n=" ...
- 数据库--iOS
1.创建表 @"create table if not exists Person(id integer primary key autoincrement,name text,gender ...