Back to Catalog
Integration
Message Transformation
Content Filter
Strip out what the receiver does not need — send only the relevant slice.
Intent & Description
Real-world Use Case
GDPR compliance in event streaming — a UserActivityEvent contains userId, sessionData, device info, and raw IP. Content Filter for the analytics topic removes raw IP (PII). Analytics consumers get everything they need for behavior analysis without any PII exposure.
Source
📌 TL;DR
Content Filter = strip the message down to what the consumer actually needs. Reduces payload, enforces data minimization, keeps PII out of places it should not be.
Advantages
- Reduces message payload size — lower broker bandwidth and consumer memory
- Prevents unintended PII or sensitive data exposure to downstream services
- Simplifies consumer logic — they only see what they need
- Easy to implement as a Pipes-and-Filters step
Disadvantages
- Filter must be maintained as source schema evolves
- Over-filtering removes data that consumers end up needing later
- Multiple filter variants (per consumer type) multiplies maintenance effort
- Irreversible — stripped data cannot be recovered downstream