Firstly, I’m biased. I’m the founder of the HornetQ project, although I don’t work on it any more. Why HornetQ over ActiveMQ? Here are a few good reasons: HornetQ is significantly faster than ActiveMQ. http://community.jboss.org/wiki/HornetQPerformance In fact, HornetQ is the #1 fastest enterprise messaging system on the market. Or at least, it was, when we … Read more
From here: The difference between the PooledConnectionFactory and the CachingConnectionFactory is a difference in implementation. Below are some of the characteristics that differ between them: Although both the PooledConnectionFactory and the CachingConnectionFactory state that they each pool connections, sessions and producers, the PooledConnectionFactory does not actually create a cache of multiple producers. It simply uses … Read more
All the explanations so far are accurate and to the point – but might be missing something: one of the main benefits of message queueing: resilience. Imagine this: you need to communicate with two or three other systems. A common approach these days will be web services which is fine if you need an answers … Read more
RabbitMQ is an AMQP broker, while ActiveMQ is a JMS one. I suggest you read the AMQP wikipedia article to get an idea of the concepts used in AMQP, which are different than the ones you’re familiar in JMS. One of the main difference is that in AMQP a producer sends to an exchange without … Read more
There is a broker attribute, org.apache.activemq.broker.BrokerService#cacheTempDestinations that should help in the failover: case. Set that to true in xml configuration, and a temp destination will not be removed immediately when a client disconnects. A fast failover: reconnect will be able to producer and/or consume from the temp queue again. There is a timer task based … Read more
ActiveMQ is a message broker which implements the JMS API and supports a number of cross language clients and network protocols. It lets you implement queues or topics and write listeners or subscribers to respond to queue events. Mule and ServiceMix are open source ESB (enterprise service bus). An ESB has capabilities beyond JMS: queuing … Read more
Apache ActiveMQ is a great workhorse full of features and nice stuff. It’s not the fastest MQ software around but fast enough for most use cases. Among features are flexible clustring, fail-over, integrations with different application servers, security etc. Apache Apollo is an attempt to write a new core for ActiveMQ to cope with a … Read more
Kafka and ActiveMQ may have some overlaps but they were originally designed for different purposes. So comparing them is just like comparing an Apple and an Orange. Kafka Kafka is a distributed streaming platform with very good horizontal scaling capability. It allows applications to process and re-process streamed data on disk. Due to it’s high … Read more
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 … Read more