ActiveMQ Clustering, Durable Subscribers, and Virtual Topics to the rescue

So you want to do publish-subscribe with ActiveMQ across distributed topics and be reliable. You can just use durable subscriptions,…

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Apache Apollo REST API

Apache Apollo is a next-generation, high-performance, multi-protocol messaging broker built from the ground up to one day be a drop-in…

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ActiveMQ: Understanding Memory Usage

As indicated by some recent mailing list emails and a lot of info returned from Google, ActiveMQ’s SystemUsage and particularly…

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Benchmarking JMS layer with JMSTester

For most of the clients I’ve been to, scaling out a JMS messaging layer with ActiveMQ is a priority. There…

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Guaranteed messaging for topics, the JMS spec, and ActiveMQ

Recently a customer asked me to look closer at ActiveMQ’s implementation of “persistent” messages, how it applies to topics, and…

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Managing large deployments of MQ and ESB with Fuse Fabric, Part I

FuseSource just recently released enterprise versions of their distributions of ActiveMQ and ServiceMix. Some of the top features include incremental…

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ActiveMQ Network Connectors

This post is more for me and any ActiveMQ contributors that may be interested in how the Network Connectors work…

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Understanding how OSGI bundles get resolved

I’d like to review how OSGI bundles get resolved and use Apache Karaf to demonstrate. Karaf is a full-featured OSGI…

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Java static methods can be a code smell

Definition of code smell (from Wikipedia): “any symptom in the source code of a program that possibly indicates a deeper…

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