NestJs Locking Resource
In NestJs between two different asynchronous calls, we had to determine if the calls are using the same resource or not, for example, uploading and deleting the resources. Sometime uploading a samefile multiple time consicutively to cause duplicates and deleting a file consicutively to throw a server error as the file being hold by the server for deletion cause major issue if the Frontend request is not properly handled.
Resource Locking is a simple concept where we can lock an async request applying for the same resource before the task is completed. Implementing a resource lock-in NestJs is pretty straightforward, let's take a simple example.
But this is not a good way to lock a resource as the server may not be a single instance and a resource could be anything besides a simple async task, if we are going to use it in an n-tier architecture then this solution will fail miserably.
A simple fix for this would be to create a resource locking mechanism using the database, here I am using Postgres and Prisma for recreating the above lock system but in a more generic way.
Like this, we can easily Lock any resource using this module now whenever and where ever we want. That's it for this post, Happy Codding 🎉😎🤘.
