Multi-Stream Projections in Marten Added in 1.2.0

Multi-stream projections in Marten: identity routing, fan-out patterns (one event updates many documents), custom groupers with DB lookups, and ViewProjection.

Use when a read model aggregates events across streams, segments a stream by time window, or needs composite identity keys. Shared with Polecat and Fisher — same API, same conventions.

Skill details

• Skill name: marten-projections-multi-stream
• Applies to: marten, polecat, fisher
• Tags: marten, projections, event-sourcing, fan-out, polecat, fisher, portability
• Added in: 1.2.0
• License: Proprietary. Copyright JasperFx Software LLC.

This skill is part of a paid product. The full content of marten-projections-multi-stream (patterns, code examples, conventions, and guidance) is distributed only to licensed customers.

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