If an exception is thrown from some thread and it’s not caught, it will be printed in the console. In your server, if the console output doesn’t go to any file or any log cloud, it will just disappear and you won’t understand what error has happened. Example 1: your multi-thread batch job seems to …
Make sure Java App’s console is collected somewhere Read More »
When I was learning about workflow engine, I couldn’t find a document or book that tells about it in a systematic way. So I wrote one myself after diving into it. Hope this can help first learners.
subscribe() is normally used to register a listener, but in Project Reactor it is used for both registering a listener and trigger a flow. onNext , onComplete are normally used for listeners to handle next and complete signals, but Project Reactor uses them as the names of the events – so there are onNext signals …
Caveats of “they perform the same” As you can see in the previous 2 articles (part1 and part2), distributed mode and bundled mode sometimes have the same performance. However, most of “the same performance” scenarios are based on this assumption: For a single service if the computer hardware is twice as good, then the performance …
In previous article we brought up the question, and we had a conclusion: In this article we’ll example how it is like if the services have different minimum computing resources TL;DR See conclusion Method and Assumptions The methods and assumptions are basically the same as previous article . Difference is A and B here will …
People say if you separate services and let them scale independently, you can will get better performance by allocating what’s needed and no computation resources will be wasted. But how exactly? And how much gain will there be compared to a monolithic solution? This article will do a quantified research. TL;DR See conclusion Method Let’s …
Using a EC2/ECS/BeanStalk – based solution is like having a dinner in a single restaurant. You eat the appetiser, the main dish and then leave = You build your web app and deploy it in a friendly container. But if you use a lambda-based solution, Dining Cloud behaviour Appetiser in a restaurant A Put AWS …
You need to do 2 things: Copy your code to S3 bucket. Don’t need a new object key in the bucket. Just use the existing one Invoke aws-cli’s “aws lambda update-function-code”, by putting s3 bucket /s3 key in the command line Then the function will be updated. You have to do 2nd step because “s3 …
Update s3-hosted lambda function code without cloudformation Read More »
To call such a module,
This is a typical deploy.sh : (Mostly copied from https://stuff-things.net/2016/07/20/invalidate-cloudfront-and-wait/ )