It’s possible to write ActiveMQ clients in other languages (such as Node.js, Ruby, and Python), but ActiveMQ is built on Java, and is probably best suited for an organization that’s already invested in Java.
ActiveMQ comes with and the suite of protocols that it supports, along with the enterprise flavour and readiness, can place this tool at the top of the list when it comes to choosing the right messaging broker for your infrastructure.
Java Message Service (JMS) is a messaging standard that allows application components based on the Java Platform Enterprise Edition (Java EE) to create, send, receive, and read messages. It enables distributed communication that is loosely coupled, reliable, and asynchronous.
ActiveMQ sends messages between client applications—producers, which create messages and submit them for delivery, and consumers, which receive and process messages. The ActiveMQ broker routes each message through one of two types of destinations: a queue and a topic.
ActiveMQ gives you the flexibility to send messages through both queues and topics using a single broker. In point-to-point messaging, the broker acts as a load balancer by routing each message from the queue to one of the available consumers in a round-robin pattern.
ActiveMQ 5 Classic: Long established, endlessly pluggable architecture serving many generations of applications.
ActiveMQ Artemis: High-performance, non-blocking architecture for the next generation of event-driven messaging applications.