dynamodb | DynamoDB data mapper for Node.js

I am having a lot of issues handling concurrent runs of a StateMachine (Step Function) that does have a GlueJob task in it.

The state machine is initiated by a Lambda that gets trigger by a FIFO SQS queue.

The lambda gets the message, checks how many of state machine instances are running and if this number is below the GlueJob concurrent runs threshold, it starts the State Machine.

The problem I am having is that this check fails most of the time. The state machine starts although there is not enough concurrency available for my GlueJob. Obviously, the message the SQS queue passes to lambda gets processed, so if the state machine fails for this reason, that message is gone forever (unless I catch the exception and send back a new message to the queue).

I believe this behavior is due to the speed messages gets processed by my lambda (although it's a FIFO queue, so 1 message at a time), and the fact that my checker cannot keep up.

I have implemented some time.sleep() here and there to see if things get better, but no substantial improvement.

I would like to ask you if you have ever had issues like this one and how you got them programmatically solved.

Thanks in advance!

This is my checker:

I'm having an issue where two concurrent processes are updating a DynamoDB table within 5ms of each other and both pass the conditional expression when I expect one to throw the ConditionalCheckFailedException exception. Documentation states:

DynamoDB supports mechanisms, like conditional writes, that are necessary for distributed locks.

https://aws.amazon.com/blogs/database/building-distributed-locks-with-the-dynamodb-lock-client/

My table schema has a single Key attribute called "Id":

I am using dynamodb and I'd like to enable dynamodb stream to process any data change in the dynamodb table. By looking at the stream options, there are two streams Amazon Kinesis data stream and DynamoDB stream. From the doc of these two streams, both are handling the data change from dynamodb table but I am not sure what the main different between using these two.

I am running DynamoDB locally using the instructions here. To remove potential docker networking issues I am using the "Download Locally" version of the instructions. Before running dynamo locally I run aws configure to set some fake values for AWS access, secret, and region, and here is the output:

I am not using AWS AppSync for this app. I have created Graphql schema, I have made my own resolvers. For each create, query, I have made each Lambda functions. I used DynamoDB Single table concept and it's Global secondary indexes.

It was ok for me, to create an Book item. In DynamoDB, the table looks like this: .

I am having issue with the return Graphql queries. After getting the Items from DynamoDB table, I have to use Map function then return the Items based on Graphql type. I feel like this is not efficient way to do that. Idk the best way query data. Also I am getting null both author and authors query.

This is my gitlab-branch.

This is my Graphql Schema

I'm relatively new to AWS and I'm creating a multi tenant API using API gateway, lambda, and dynamodb. I want to make sure each tenant can only access their own data. I'll be partitioning the dynamodb table data based off orgId's (tenant ids)that I generated and assigned. Right now I have basic API keys/usage plans set up with API gateway, but I'm having trouble figuring out how best to determine which tenant called the api based off the api key they used. Should I retrieve the api key from the request header and use that to find the right orgId to partition the data? Or is there some other better way to handle this situation?

I have one React Amplify app running with two environments. One environment is for my wife's blog (www.riahraineart.com) and one for my blog (www.joshmk.com). Both sites are running off the same repo, I'm just configuring the site's differently based on an environment variable I use to retrieve their configurations from a table.

I have a Person object which has 20 fields and stored in dynamoDB. I want to create a new Person object based on some input, check if the same object exists in the Database or not. If it exists, I want to compare the 2 objects on the basis of 19 fields out of 20. The field to ignore is a boolean flag check.

I am using Lombok @Data to generate the equals method.

Is there a way to do this without having to write a full fledged overriden equals method myself ?

I've been working on a project which so far has just involved building some cloud infrastructure, and now I'm trying to add a CLI to simplify running some AWS Lambdas. Unfortunately both the sdist and wheel packages built using poetry build don't seem to include the dependencies, so I have to manually pip install all of them to run the command. Basically I

1. run poetry build in the project,
2. cd "$(mktemp --directory)",
3. python -m venv .venv,
4. . .venv/bin/activate,
5. pip install /path/to/result/of/poetry/build/above, and then
6. run the new .venv/bin/ executable.

At this point the executable fails, because pip did not install any of the package dependencies. If I pip show PACKAGE the Requires line is empty.

The Poetry manual doesn't seem to specify how to link dependencies to the built package, so what do I have to do instead?

I am using some optional dependencies, could that be interfering with the build process? To be clear, even non-optional dependencies do not show up in the package dependencies.

pyproject.toml: