activemq

I looked it up and you send messages to it. But why? Why wouldn't you just use a database? There must be some feature that ActiveMQ has that databases do not? Hiram Chirino It is used to reliably communicate between two distributed processes. Yes, you could store messages in a database to communicate between two processes, but, as soon as the message is received you'd have to delete the message. That means a row insert and delete for each message. When you try to scale that up communicating thousands of messages per second, databases tend to fall over. Message oriented middle-ware like

今天使用spring 整合 activeMQ. 发现出现问题一直报 activeMQ faild to acquire lock， 网上查了一下，原因是：activeMQ的broker在启动时会锁定数据库（activeMQ持久化到了mysql数据库）。我们每个人在调试时，自己的运行环境中就会运行一个broker，所以会出现争用锁的现象（如果只有一个人运行则不会出现这样的问题），报错大体界面如下： 处理办法：在config的activemq.xml中，修改jdbcPersistenceAdapter选项，添加一个：useDatabaseLock="false"， <persistenceAdapter> <jdbcPersistenceAdapter dataSource="#mysql-ds" useDatabaseLock="false" /> </persistenceAdapter> 来源： https://blog.csdn.net/a826193310/article/details/102754329

I'm trying to connect to an ActiveMQ broker using AMQP 1.0, but I want to use JMS within my application code. I'm interested in using JMS primarily because I want developers to be able to use API's that they are already familiar with. I have ActiveMQ 5.14.0 running on localhost and the following code : public static void main(String[] args) throws JMSException, InterruptedException { Connection connection = null; try { // Producer ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("amqp://localhost:5672"); connection = connectionFactory.createConnection(); connection.start();

Error Message org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'javax.jms.ConnectionFactory' available: expected single matching bean but found 2: activeMQConnectionFactory,springFactory 今天使用springboot Demo ActiveMQ过程中，注入 ConnectionFactory 时，SpringBoot 自动配置时发现因为多个候选bean注入失败，解决此问题有两个方法: // 1. 当bean定义阶段和bean注入阶段代码都可以修改时优先采用@Qualifier注解在bean注入阶段解决，使用之前需要先获得bean的名称; @Autowired @Qualifier(value = "activeMQConnectionFactory") public ActiveMQConnectionFactory mqConnectionFactory; @Bean(name = "activeMQConnectionFactory") public ActiveMQConnectionFactory

今天分享的是activemq框架和spring框架的整合使用。 (1)导入activemq的核心jar包和整合spring需要的两个jar包 context-support和jms.jar(使用spring的版本是4.2.7 activemq的版本是5.11.2) <!--锁定版本号--> <properties> 　　<spring.version>4.2.4.RELEASE</spring.version> 　　<activemq.version>5.11.2</activemq.version> </properties> <!--添加依赖--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jms</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> </dependency> <dependency> 　　<groupId>org.apache.activemq</groupId> 　　<artifactId>activemq-all</artifactId> <

Can anyone assist me with steps to install ActiveMQ on mac. I have downloaded the older ActiveMQ and run command ./activemq start its shows pid file created. But when I try to access localhost:8161 from safari, it does not open. Please suggest. Yes, I have observed this too, what I did was, Go to activemq folder on your machine inside the bin folder and do activemq start or activemq restart , after this the ActiveMQ instance starts correctly and you can access it using URL http://localhost:8161/admin (default location,might be different if you changed the configuration). hope this helps! Good