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Use Amazon Bedrock and LangChain to build an application to chat with web pages
Learn how to build the Go web app, deploy it with AWS CDK and start asking questions!Conversational interaction with large language model (LLM) based solutions (for example, a chatbot) is quite common....
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My top picks of re:Invent 2023
re:Invent 2023 has been wrapped up. Before we start preparing for the 2024 edition 😅 let me recap the announcements I was most excited about. Here is my favorite list, in no particular order 1. Amazon...
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Using IAM authentication for Redis on AWS
How to securely connect your Go applications to Amazon MemoryDB (or ElastiCache) for Redis using IAMAmazon MemoryDB for Redis has supported username/password based authentication using Access Control...
View Article[20 Days of DynamoDB] Day 1 - Conditional PutItem
For the next 20 days (don't ask me why I chose that number 😉), I will be publishing a DynamoDB quick tip per day with code snippets. The examples use the DynamoDB packages from AWS SDK for Go V2, but...
View Article[20 Days of DynamoDB] Day 2 - GetItem add-on benefits
Posted: 9/Jan/2024Did you know that the DynamoDB GetItem operation also gives you the ability to:Switch to strongly consistent read (eventually consistent being the default)Use a projection expression...
View Article[20 Days of DynamoDB] Day 3 - UpdateItem add-on benefits
Posted: 10/Jan/2024The DynamoDB UpdateItem operation is quite flexible. In addition to using many types of operations, you can:Use multiple update expressions in a single statementGet the item...
View Article[20 Days of DynamoDB] Day 4 - Conditional UpdateItem
Posted: 11/Jan/2024Conditional operations are helpful in cases when you want a DynamoDB write operation (PutItem, UpdateItem or DeleteItem) to be executed based on a certain criteria. To do so, use a...
View Article[20 Days of DynamoDB] Day 5 - Avoid overwrites when using DynamoDB UpdateItem...
Posted: 12/Jan/2024The UpdateItem API creates a new item or modifies an existing item's attributes. If you want to avoid overwriting an existing attribute, make sure to use the SET operation with...
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Build a Streamlit app with LangChain and Amazon Bedrock
Use ElastiCache Serverless Redis for chat history, deploy to EKS and manage permissions with EKS Pod IdentityIt's one thing to build powerful machine learning models and another thing to be able to...
View Article[20 Days of DynamoDB] Day 6 - Atomic counters with UpdateItem
Posted: 15/Jan/2024Need to implement atomic counter using DynamoDB? If you have a use-case that can tolerate over-counting or under-counting (for example, visitor count), use the UpdateItem API.Here is...
View Article[20 Days of DynamoDB] Day 7 - DeleteItem API
Posted: 16/Jan/2024The DynamoDB DeleteItem API does what it says - delete an item. But it can also:Return the content of the old item (at no additional cost)Return the consumed Write Capacity Units...
View Article[20 Days of DynamoDB] Day 8 - Conditional Delete operation
Posted - 17/Jan/2024All the DynamoDB write APIs, including DeleteItem support criteria-based (conditional) execution. You can use DeleteItem operation with a condition expression - it must evaluate to...
View Article[20 Days of DynamoDB] Day 9 - Query API
Posted - 18/Jan/2024The Query API is used to model one-to-many relationships in DynamoDB. You can search for items based on (composite) primary key values using Key Condition Expressions. The value for...
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Build a Serverless GenAI solution with Lambda, DynamoDB, LangChain and Amazon...
DynamoDB is used as the chat history backend along with AWS Lambda Web adapter for response streamingIn a previous blog, I demonstrated how to Redis (Elasticache Serverless as an example) as a chat...
View Article[20 Days of DynamoDB] Day 10 - Query API with Filter Expression
Posted: 19/Jan/2024With the DynamoDB Query API, you can use Filter Expressions to discard specific query results based on a criteria. Note that the filter expression is applied after a Query finishes,...
View Article[20 Days of DynamoDB] Day 11 - Using pagination with Query API
Posted: 22/Jan/2024The Query API returns the result set size to 1 MB. Use ExclusiveStartKey and LastEvaluatedKey elements to paginate over large result sets. You can also reduce page size by limiting...
View Article[20 Days of DynamoDB] Day 12 - Using the DynamoDB expression package to build...
Posted: 23/Jan/2024The expression package in the AWS Go SDK for DynamoDB provides a fluent builder API with types and functions to create expression strings programmatically along with corresponding...
View Article[20 Days of DynamoDB] Day 13 - Using the DynamoDB expression package to build...
Posted: 25/Jan/2024Thanks to the expression package in the AWS Go SDK for DynamoDB, you can programmatically build Condition expressions and use them with write operations. Here is an example with the...
View Article[20 Days of DynamoDB] Day 14 - Using the DynamoDB expression package to build...
Posted: 30/Jan/2024You can use expression package in the AWS Go SDK for DynamoDB to programmatically build key condition and filter expressions and use them with Query API.Here is an example that...
View Article[20 Days of DynamoDB] Day 15 - Using the DynamoDB expression package to build...
Posted: 31/Jan/2024The DynamoDB Go SDK expression package supports programmatic creation of Update expressions. Here is an example of how you can build an expression to include execute a SET operation...
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