Hi, welcome to another weekly update, it’s been a busy few weeks for me so lots of things to catch you up on! Production-Ready Serverless workshop is back! My 4-week Production-Ready Serverless workshop is coming back in September. With an improved and more comprehensive curriculum based on student feedback from the last run in May, when over …
TL;DR – Lambda-to-Lambda calls are generally a bad idea except for some select use cases, such as: You’re running the Apollo server in a Lambda function. To offload secondary responsibilities to another function by invoking asynchronous (that is, using Event as InvocationType). Avoid synchronous lambda-to-lambda calls If you utter the words “I call a Lambda …
I have been working with a US client to build a first-of-its-kind application to manage your consent to share your data amongst healthcare providers in your state. The project falls within HIPAA, so we need to meet all the HIPAA compliance requirements, including having a full history of the user data. To meet that audit …
My 4-week Production-Ready Serverless workshop is back! With an improved and more comprehensive curriculum based on student feedback from the last run in May, when over 50 students from around the world took part. This is a hands-on workshop where you will learn best practices for building serverless applications by building an e-commerce solution from …
Production-Ready Serverless is back (with improved curriculum)! Read More »
It’s been 12 months since I left full-time employment to fly solo as an independent consultant. After 15 years of full-time employment, I had to learn a lot, very quickly, after making this career change. Honestly, life has been great since. Even a global pandemic hasn’t managed to dampen my mood! In case you’re considering …
I left full-time employment, here’s what happened since Read More »
Update 21/06/2020: following lots of feedback and questions on Twitter, I have updated the post to include a few more options. Quite a few clients have asked me “Hey Yan, what API Gateway auth method should I use for this REST API?” so I thought I’d share my answer with everyone here. This is the …
Hi, welcome to another weekly update. First of all, I want to thank Dynobase for sponsoring this week’s update. Dynobase – Professional GUI Client for DynamoDB Dynobase accelerates your DynamoDB workflow with easier data exploration, code generation, bookmarks, tabs, history, import/export capabilities and much more. Dynobase is available for Mac, Windows and Linux. Download Free 7-Day Trial. …
I had been working on a client project where I built the GraphQL backend for a new social network using primarily AppSync, Lambda and DynamoDB. One of the features of the app was to support private messaging between two users. To allow either user to fetch their chat messages in chronological descending order, I modelled …
AppSync: how to compare strings lexicographically in VTL Read More »
Hi, welcome to another weekly update. Production-Ready Serverless workshop goes virtual! Starting from May 4th, I will be running a 4-week instructor-led workshop that teaches you everything you need to know to build a production-ready serverless application. It’s based on the same demo app as my Manning course, but all the code has been completely …
TL;DR To make an AppSync DynamoDB resolver throw exceptions on conditional check errors, we need to check $context.error in the response mapping template ourselves. Like this: #if ( $ctx.error ) #if ( $ctx.error.type.equals(“DynamoDB:ConditionalCheckFailedException”) ) $util.error(“your error message”) #else $util.error($ctx.error.message, $ctx.error.type) #end #end $utils.toJson($context.result) And now, the longer version. The problem AppSync lets us perform DynamoDB …
AppSync: how to error on DynamoDB conditional check failures Read More »
By continuing to use the site, you agree to the use of cookies. more information
The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.