Changelog

v1.3.0 - October 14, 2024

Add long-term message storage. Set the store parameter for server-initiated message publishes or set the store claim for client-initiated messages to an integer number in seconds to specify how long messages should be retained.
Include connectionSecret in hotsock.connected message, which when combined with the connection ID is an API key that can make HTTP requests to the HTTP API to list and publish messages for a channel.
Add historyStart claim to specify the timestamp of how far back a connection can query for past messages using the HTTP API.
Reduce the HTTP API timeout from 10 seconds to 5 seconds.
Add CORS support to the HTTP API.
Improve performance of the hotsock.connected message. Where this message was previously received 300-600ms after the connection was established, it is now received within 30-60ms.
Switch the DynamoDB Streams FilterCriteria patterns to use the object type (T) attribute value to determine if it should be consumed by the stream processor instead of using arbitrary key prefixes/suffixes.
Improve log redaction of API keys and connection secrets.
Add stream processor metrics that are published from logs using CloudWatch Embedded Metric Format (EMF).

Switch from AWS Managed KMS Key to AWS Owned Key for DynamoDB table encryption to avoid cost issues with concurrent UpdateItem calls trigging tons of kms:Decrypt operations. A future release can offer KMS/CMK as an explicit opt-in where such costs are acceptable.
Change the main table batch size for DynamoDB Stream processing from 100 to 1000 and add a filter pattern so only specific keys are processed.
Always use SNS PublishBatch() instead of single Publish() calls to maximize throughput.

Add a "Pre-warm environment" (PreWarmEnvironmentParameter) CloudFormation option to keep all time-sensitive, user-facing Lambda functions warm using a one-per-minute scheduled invocation. Designed for staging or demo environments where traffic often drops to zero, but where you don't want noticeable cold starts when usage resumes.
Set MemorySize: 1769 for the main table stream processor to give it a full vCPU.

Initial public release! 🎉

Read the launch blog post to learn more.