Java

We’ve been developing rich client-side applications that talk directly to Solr’s HTTP interface from Javascript — requiring a publicly accessible Solr. One concern that you’ll naturally have with Solr is that by default Solr’s HTTP API has no concept of security. For example, after standing up Solr, anyone, from anywhere can browse to your index and delete everything.At this point you...

FUN With Points! Over the last few months I’ve been getting some teams up and running with Scrum, and one area I always seem to have “fun” with is introducing people to the points-based system of estimating. So much fun in fact, that I’ve decided to write this very blog post about it! See how much fun it is already? No? ok. When we do our estimating (during the planning sessions) we...

Preview Text: Ever since Facebook promoted its “graph search” methodology, lots of people in our industry have been waking up to the fact that graphs are über-cool. Legacy Sponsored: unsponsored

RabbitMQ is a popular message broker typically used for building integration between applications or different components of the same application using messages. This post is a very basic introduction on how to get started using RabbitMQ and assumes you already have setup the rabbitmq server. RabbitMQ is written in Erlang and has drivers/clients available for most major languages. We are using...

Originally authored by Martin Sustrik Preview Text: I've spent last month re-writing the code of nanomsg to use state machines internally, passing asynchronous events around instead of using random callbacks between the components. The change is complex, requires a lot of work and it is not visible to the end user, so the question is: Why do...

Jikes RVM includes two compilers. One is the baseline compiler, and the other is optimizing compiler, which is commonly referred to as the JIT compiler. Preview Text: Here, we will study the optimizing compiler in Jikes RVM. The package org.jikesrvm.compilers contains the source code of the compilers, where The package org.jikesrvm.compilers.opt...

Here's a moderately sized list of Books, Blogs, Articles, Podcasts, and Videos about DevOps, Continuous Delivery, and workplace culture. From the blog "Opus Magnus"...I’ve been indexing some resources privately and it’s become apparent to me that it would be useful to be able to refer other people to the original sources that are informing me. This is by no means exhaustive, and I do...

Gelfands’s question asks whether there is a positive integer n such that the first digits of jn base 10 are all the same for j = 2, 3, 4, …, 9. (Thanks to @republicofmath for pointing out this problem.) This post will explore Gelfand’s question via probability. Preview Text: The MathWorld article...

Recently I’ve had the pleasure of setting up a new build environment at work to replace our TFS Team Build setup and its build-information-opaqueness. In the process I uncovered a lot of not-so-fun-to-be-a-developer things that our large corporate IT Infrastructure team have in place to keep the masses at bay – one of those things is an NTLM proxy server. And so the head banging began –...

I’ve seen a pattern at a number of companies recently. It’s a pattern that demonstrates the danger of doing too many things at once. I call it the organizational death spiral. Preview Text: I’ve seen a pattern at a number of companies recently. It’s a pattern that demonstrates the danger of doing too many things at once. I call it the...