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Lambda

2023

Implement custom retry logic with SQS & Lambda - Part II - using EventBridge Scheduler
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AWS Serverless Lambda EventBridge Scheduler
This explains a way to implement custom retry logic with EventBridge Scheduler and Lambda.
Implement custom retry logic with SQS & Lambda - Part I - using SQS delayed messages
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AWS Serverless Lambda SQS
This explains a way to implement custom retry logic with SQS and Lambda.
Testing AWS Lambda Recursive Loop Detection
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AWS Serverless Lambda Recursion
This explains the new Lambda recursive loop detection and how to test this new feature.
Load Data From S3 to Postgres using Step Functions
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AWS Serverless Lambda Step Functions Postgres
In this post, I discuss how we can use Step Functions Distributed Maps to parallelise the csv data loading to a database.
AWS Lambda Concurrency when SQS FIFO Queue as Trigger
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AWS Serverless Lambda SQS Concurrency
In this blog, it is discussed how Lambda concurrency is determined when a SQS FIFO queue is configured as the trigger.
Self healing Serverless App with Lambda Destinations and EventBridge
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AWS Lambda Serverless EventBridge EventBridge Pipe SQS
In this blog post, explains how a Lambda based Serverless application reacts to the errors and attempts to re-drive messages to the origin in a controlled manner.

2022

AWS Step Functions — Are Active Executions Affected When Your State Machine Gets Updated?
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AWS Lambda Serverless Step Functions CDK
Looking into different scenario of SF executions vs state machine updates
Simple Leave Management System with AWS Serverless
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AWS Lambda Serverless Step Functions DynamoDB SES
This is how I built a simple leave management system using AWS Serverless services

2021

How to create a simple OTP service with AWS Serverless services
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AWS Serverless SES Lambda DynamoDB APIGateway
This post describes how to implement a simple One Time Password (OTP) system with AWS Serverless services
How I created a Photo Booth with AWS Serverless
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AWS Serverless Step Functions Lambda SES S3
This explains how I created a simple photo booth with AWS Serverless services

2020

How I created a 'physical' alarm to warn me when my servers are down
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AWS Serverless Lambda IoT Greengrass
This explains the process to create an alarm to trigger when AWS EC2 servers are down
How I created a door bell with AWS Serverless
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AWS Serverless Lambda Step Functions S3
Explains the steps of me creating a doorbell using Raspberry Pi and AWS Serverless services.

2019

Whitelisting Lambda IP for Downstream Services
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AWS Lambda Security Serverless
This blog post discuss how we can allow access from Lambda from an external system by whitelisting IP.
Understanding Lambda Concurrency
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AWS Serverless Lambda Concurrency
This blog post explains the behaviour of Lambda when they run simultaneously.