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Work with AWS S3
This post is my note to work with AWS S3. Permissions Allow to access specific location
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CI/CD with Jenkins
I choose Ubuntu because we can install it easily with apt. Don’t use Amazon Linux Image because it’s complex, consist of series of steps. I. Install Jenkins To install Jenkins on Ubuntu, you can follow these steps: This command installs OpenJDK 11, which is recommended for Jenkins. You can also enable Jenkins to start on…
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Event-Driven Handlers in Rails
Event-Driven Architecture is not new. It is implemented in many big systems such as commercial website, blockchain crypto currency exchange, game development like unreal engine blueprints etc. It solves many problems related to performance problems as well as asynchronous tasks. In distributed system, talking about implementation especially the cloud computing such as AWS serverless EventBridge,…
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Performance Optimization #1
Talking about performance optimization which is a big topic. Because there are so many thing affecting the performance. It depends on so many factors such as infrastructure, coding, networking etc. In this article I just present the performance issue that I encountered and how to solve it. This is a small topic, small solution for…
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Restart Puma Server with zero downtime
As a ruby on rails developer, I also think about the performance and availability dimensions of system. We know that the blue green deployment help us this problem. But we don’t really need a complex kind of this deployment. It also costs us more money because we have to build more environment to switch when…
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The Art of coding design
Coming soon
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Dropzone
Basic configuration. autoQueue: true, which means auto call url to upload itself. If value is false, we have to implement custom upload. Render and listening events on “success” we want to put image url which returned from ajax to custom div. On “complete” we want to remove the preview of image (default).
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How to use pynamodb with CRUD
Pynamodb is a python library that is very helpful to play with dynamodb. It even helps us to do with a shorter code than ruby. Now let’s go through CRUD operations in short. Import class and data type. Declaring Meta class which is the nested class containing the configuration for pynamodb such as table_name and…
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AWS SAM creates lambda function
Create Function In order to have expected function name we need to add “FunctionName” to Properties in template file. Sam won’t do this automatically for us. We do this manually. We basically need to modify the template after it generated by sam using existed template like helloword for example. Timeout in seconds. Bind event to…
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Rails 7 Importmap pin import and preload
When we pin a file, it would go here which is a map of urls. This is the instruction for browser. Let’s say we have this directory. After “pin” we “import”. “Import” is just an action to map file to file like javascript mechanism. We don’t do relative import for javascript in rails 7. It…
