This is the second (and, for the time being, the last) article about messaging and Mangos. After doing first steps with the Pair protocol, we now look into a slightly more complex protocol, the Publisher-Subscriber (or PubSub) protocol.
The next problem in “The Little Book of Semaphores” is called “the senate bus problem” and reads as follows: Riders come to a bus stop and wait for a bus. When the bus arrives, all the waiting riders invoke boardBus, but anyone who arrives while the bus i...
Consider two processes that need to exchange commands and data. You want to connect them in a way that is straightforward, efficient, and reliable. How would you do that? Enter Message Queues.
The author of “The Little Book of Semaphores” wrote this week’s problem inspired by real life events at Colby College. The problem’s statement is the following: The following synchronization constraints apply to students and the Dean of Students: Any num...
Next problem in line in the the little Go book of semaphores series is about caring for children. It comes from the book “Operating Systems and Middleware: Supporting Controlled Interaction” by Max Hailperin (problem 4.6). It reads as follows: State licensing rules r...
Go is known to be a very capable systems programming language. Programmers enjoy it’s simplicity, ease of deployment, and performance when writing backend services. A key feature in any backend software service is networking communications. There are numerous application...
Introduction If you are new to Linux or the Mac you might find installing Go to be a bit confusing. It was for me when I started learning Go. Go was the reason I stopped using Windows, which I used for 20 years. Even if you’re experienced with these operation systems, setti...
The next chapter in the the little Go book of semaphores series introduces the “not remotely classical problems” and the first one is called “the sushi bar problem”. Imagine a sushi bar with 5 seats. If you arrive while there is an empty seat, you can tak...