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Benchmarking High-Concurrency HTTP Servers on the JVM

After a first post about HTTP clients, to which I redirect you for an introduction about efficient HTTP on the JVM, let’s now talk about HTTP servers. There are several benchmarks about HTTP servers out there but they’re often hindered by shortcomings such as: Not exercising effectively high-concurrency scenarios and, more generally, considering unrealistic and unrepresentative ones, for example: The pure-overhead scenario, ...

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Distributed Quasar Actors with Kafka and ZeroMQ

java-interview-questions-answers

So you’ve got a fancy design using actors, you’ve chosen the JVM and Quasar’s powerful, loyal take on the subject. All wise decisions, but then what are your options for distributing them on a cluster? Galaxy Galaxy is a really cool option: a fast in-memory data grid optimized for data locality with replication, optional persistence, a distributed actor registry and even ...

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AWS Lambda with API Gateway

java-interview-questions-answers

In a previous post I showed you how to create and deploy an AWS Lambda. We will continue that work and look at updating just the code for that lambda. We will also add a REST endpoint to the AWS Lambda using AWS API Gateway. So before you continue … if you haven’t already, please follow the instruction in the ...

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How to Use the XML Plugin for Apache Drill

A few months ago, I created the first XML plugin for Apache Drill. The idea behind the plugin is simple: Since Apache Drill already has great support for JSON, why not convert the XML documents to JSON, and feed the information into the JSON driver for further processing and presentation in Apache Drill? In this blog post, I’ll show you ...

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Extreme Developer eLearning Courses Giveaway

Hey fellow geek! We have some great news! This week is giveaway week! We are running a contest giving away FREE eLearning Courses! We have everything, whether you are focused on Java programming, Web Development, System Administration, or well.. all the above! There will be totally 3 winners. Let’s see what prizes you can win… 1) Complete Java Programming Bootcamp ...

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Advice for managing software development?

When I started writing my management blog series one reader expressed their hope that I would give advice on how to manage software development. I’m sorry, but this series has contained very little advice on how to manage software development. There is a good reason for that: It is hard to give specific advice to managers. You can’t say “If ...

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3 Easy Things to Do to Make Your Microservices More Resilient

One of the advantages of building distributed systems as microservices is the ability of the system as a whole to withstand faults and unexpected failures of components, networks, compute resources, etc. These systems are resilient even in the face of faults. The idea behind this resiliency seems simple: if our monolith fails, everything for which it’s responsible fails along with ...

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When is Agile Wrong for You?

People often ask me, “When is agile  right or not right for a project?” I’ve said before that if the team wants to go agile, that’s great. If the team doesn’t, don’t use agile. That answer is insufficient. In addition to the team, we need management to not create a bad environment for agile. You might not have a great ...

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JBoss Fuse: dynamic Blueprint files with JEXL

java-interview-questions-answers

In this post I’ll show how to add a little bit of inline scripting in your Apache Aries Blueprint xml files. I wouldn’t call it necessarely a best practice, but I have always had the idea that this capability might be usueful; probably I started wanting this when I was forced to use xml to simulate imperative programming structures like ...

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