Posted On: Dec 20, 2022

Amazon Lambda now supports content filtering options for Amazon MSK, Self-Managed Kafka, Amazon MQ for Apache ActiveMQ, and Amazon MQ for RabbitMQ. With event pattern content filtering, customers can write complex rules so that their Lambda function is only invoked to process meaningful events. This helps reduce traffic to customers’ Lambda functions, simplifies code, and reduces overall cost.  Filtering was already available for SQS, DynamoDB, and Kinesis as event sources for Lambda.

Customers can specify up to 5 filter criteria when creating or updating the event source mappings for their Lambda functions triggered by an event source that supports filtering. The filters are combined using OR logic by default. In other words, an event/payload meeting any of the filtering criteria defined will be passed on to trigger a Lambda function while an event/payload not matching any of the filtering criteria will be dropped. This feature helps reduce function invocations for microservices that only use a subset of events available, removing the need for the target Lambda function or downstream applications to perform filtering.

Content filtering is available in Amazon Web Services China (Beijing) Region, operated by Sinnet, and Amazon Web Services China (Ningxia) Region, operated by NWCD. There is no additional cost for using this feature beyond the standard price for Amazon Lambda. To learn more about the feature, visit the Amazon Lambda documentation for event filtering.