Christian Posta

About Christian Posta

Christian is a Principal Consultant at FuseSource specializing in developing enterprise software applications with an emphasis on software integration and messaging. His strengths include helping clients build software using industry best practices, Test Driven Design, ActiveMQ, Apache Camel, ServiceMix, Spring Framework, and most importantly, modeling complex domains so that they can be realized in software. He works primarily using Java and its many frameworks, but his favorite programming language is Python. He's in the midst of learning Scala and hopes to contribute to the Apache Apollo project.

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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 the MemoryUsage functionality has left some people ...
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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 are a couple ways to achieve this, but without a doubt, creating benchmarks ...
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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 what happens in failover scenarios when there ...
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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 patching, custom platform installers, ...
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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 for ActiveMQ. I recently spent some time looking at the code and thought ...
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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 container based on the Apache Felix kernel and is the corner stone ...
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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 problem.” In Java, static methods allow ...
spring-interview-questions-answers

Backing Spring Integration routes with ActiveMQ

As discussed in my previous post, Spring Integration (SI) is a routing framework built on top of the Spring Framework that allows you to use proven enterprise integration patterns ...
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REST endpoint for integration using Apache Camel

REST is an architectural style used for organizing resources and when applied to HTTP-based services allows building stateless, decoupled, scalable services. HTTP methods, HTTP headers, ...
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Being a better enterprise architect

Enterprise architects seem to become more and more involved in “trying out new things” or pushing down technology or implementation advice — nay dictation — without having a ...
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