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Retrofit2: Get the body from an error response

Retrofit2 is a nice library for making HTTP rest requests. It includes a static utility (CallUtils) for getting the result from your request, but if the api you’re calling doesn’t return a 2xx request...

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Single Node Kubernetes on Raspberry Pi 4

In this post, I will go through the steps I used to create a single node Kubernetes combination master and worker node on a Raspberry Pi 4. The heavy lifting in this post is done via the Rancher K3s...

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Let’s build a WordPress & Kernel updated AMI with Packer

First, let’s start with What is an AMI? An Amazon Machine Image (AMI) is a master image for the creation of virtual servers in an AWS environment. The machine images are like templates that are...

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Redis Bitmaps: Storing state in small places

Redis is a popular open source in-memory data store that supports all kinds of abstract data structures. In this post and in an accompanying example Java project, I am going to explore two great use...

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Kafka Schema Evolution With Java Spring Boot and Protobuf

In this blog I will be demonstrating Kafka schema evolution with Java, Spring Boot and Protobuf.  This app is for tutorial purposes, so there will be instances where a refactor could happen. I tried to...

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Building Better Data Visualization Experiences: Part 1 of 2

Through direct experience with data scientists, business analysts, lab technicians, as well as other UX professionals, I have found that we need a better understanding of the people who will be using...

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A security model for developers

Software security is more important than ever, but developing secure applications is more confusing than ever. TLS, mTLS, RBAC, SAML, OAUTH, OWASP, GDPR, SASL, RSA, JWT, cookie, attack vector, DDoS,...

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Unleashing Feature Flags onto Kafka Consumers

Feature flags are a tool to strategically enable or disable functionality at runtime. They are often used to drive different user experiences but can also be useful in real-time data systems. In this...

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Building Better Data Visualization Experiences: Part 2 of 2

As early as 2006, Clive Humby, a renowned British mathematician and marketing genius, declared, “Data is the new oil.” Business intelligence (BI) and data visualization are still ever-growing concerns....

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Natively Compiled Java on Google App Engine

Google App Engine is a platform-as-a-service product that is marketed as a way to get your applications into the cloud without necessarily knowing all of the infrastructure bits and pieces to do so....

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