Singleton Design pattern The singleton design pattern is a software design principle used to restrict the instantiation of a class to one single instance. This is helpful when exactly one object is needed to coordinate actions across the system. The singleton pattern ensures that a class has only one instance and provides a global point of access to it.
Concurrency: Imagine you have several tasks or threads labeled T1, T2, and T3, and they’re all being processed by a single-core processor. Concurrency occurs when these threads are in different execution stages simultaneously but not advancing together.
We encountered a requirement to set up dual databases in Rails. Our app is hosted on Heroku, primarily using the Postgres database add-on. Additionally, we decided to create another database on an AWS RDS instance, allowing our Heroku app to point to these two databases.
Finding Maximum Sum of Contiguous Array: A Cross-Language Solution
In a distributed environment, where multiple apps share a single database, running migrations simultaneously can lead to conflicts and deployment failures. In this article, we'll explore a solution to prevent concurrent migrations and ensure smooth deployments. We'll discuss the issue, the approach used, and the code changes implemented to tackle this problem.