best-practices | Sapient Global Best Practices Repository

This question follows on from a previous one I asked yesterday here from which I tried to follow the advice given by @jonrsharpe

I want to follow the bank accounts of a user that I initiate with the following file

config.yaml

I am trying to correctly write an aws lambda using Java that will use aws sdk SqsClient and SnsClient. I see that these clients implement close() method, and it is generally a good practice to call this method when client is no longer required. And the best practices for lambda (https://docs.aws.amazon.com/lambda/latest/dg/best-practices.html) advices to

Initialize SDK clients and database connections outside of the function handle

So, my question is: is aws lambda wise enough to close aws sdk clients automatically, so that I can write something like this, and do not worry about closing the client explicitly when lambda container is closed.

I'm playing around with an esp32 (c with esp-idf, not with arduino) for a hobby project of mine. I'm currently programming a little drone that I can control with my smartphone. All works well.

But now I need to create system for persistent settings and parameters. For example pid-tuning parameters or what sensors are enabled and more. The general idea was to have a settings file in flash that is read on startup. The settings can then be used in the individual modules of the program. Now I'd also like to change those settings during runtime. For example pid tuning parameters. I don't want to reboot the system only to change a small parameter.

So now my question: How can I handle changes to those settings during runtime?

• An idea was to have the module periodically ask a special "settings-module" if there are any changes. It would then change its internal settings accordingly. As settings shouldn't change that often I think the overhead of constantly asking for updates is rather unnecessary.

• A more extreme idea was, to give a pointer to the variable in question to the "settings-module". If any changes have to be made the settings module would change the variable directly.

• Or maybe a callback system?

The ideas seem feasible but I don't know if there are any best-practices or better options.

Does anyone of you know a name of a technique I can google or maybe an library that provides something similar?

Thanks!

I am rather new to the TalkBack functionality, and I need help. I have a Xamarin app, and I need it to work the DPAD keyevents (up, down, left, right) when the TalkBack function is active.

Of course, this is a rather new option and there is no information, none, nada, nothing about this on non native components which my Xamarin app uses, and I had to convert code from java to c#.

Following this site: https://developer.android.com/training/tv/accessibility/non-native-best-practices

I have done what I could, but I have to interpret the last function to c#, and here is the problem.

Java code:

this is my gitignore file

My company has 2 AWS accounts. On the first (lets call it playground), I have full administrative permissions. On the second (lets call it production) I have limited IAM permissions

I enabled AWS Config (using the terraform file on the appendix) on both accounts.

• On the playground it runs smoothly, everything is fine.
• One the production, it fails. More specifically, it fails to detect the account's resources with the message "Your resources are being discovered" as shown in the screenshot below.

I initially suspected this could be an IAM role permission issue.

e.g running

aws configservice list-discovered-resources --resource-type AWS::EC2::SecurityGroup --profile playground gives me a list of the SecurityGroups discovered by the AWS Config on the playground (pretty much what I see on the console dashboard).

On the other hand:

aws configservice list-discovered-resources --resource-type AWS::EC2::SecurityGroup --profile production returns a null list (there are security groups though. Same results with other types such as AWS::EC2::Instance)

I have been using the following function to store a file in Firebase Storage, return the URL, which I then store along with some other fields, in Firestore.

Where do I add an 'await' or how do I add a promise so that the 'history.push("/") is not called until all operations have completed? At the moment I think it's pushing me on to the next page before it's finished.

I am trying to build a huge docker image in an optimized way by applying the principles of incremental building explained here https://www.docker.com/blog/intro-guide-to-dockerfile-best-practices/ .

Unfortunately each time I run the build command docker restarts building the image from scratch, and so I have to download again all the maven dependencies.

Here is the build command:

I'm migrating from an architecture that I have a Lambda inside a Private Subnet, talking with a Public Subnet that has a NatGateway, triggered by an API Gateway WebSocket. And now I removed the Nat Gateway and inserted a VPC Endpoint with a VPC Link. That I found in the link: https://d1.awsstatic.com/whitepapers/private-api-best-practices.pdf

My VPC endpoint is currently with a policy all open, I didn't use the Enable Private DNS Name , because in my VPC there are another projects that talk with API Gateway.

My API Gateway triggered the Lambda, but could not respond to the return message. My lambda has a timeout.

In my older architecture, my return endpoint was https://{restapi-id}.execute-api.{region}.amazonaws.com/{stage}, and now when I try to respond, it doesn't work with that endpoint.

Do I have to change the Endpoint?

My Security Group and NACL are very open until I finish testing this connection. The VPC Link and the API Gateway Endpoint are configured with the Lambda Subnet and the Lambda Security Group.

Is something missing from VPC Link or VPC Endpoint?

Edit: I activated the log in the ApiGateway, and before the lambda logs it returns: