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Implementing Domain-Driven Design by Vaughn Vernon

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Continuous Queries

Some Fabrics support a kind of event notification known as Continuous Query. This enables a client to register a query with the Fabric that will ensure that the client receives notification of changes in the cache that satisfy the query. One use of the Continuous Query is by user interface components, which enables these to listen for changes that could impact the current view.

Do you see what’s coming? CQRS has a strong fit with the Continuous Query feature, assuming that the query model is maintained in the Fabric. Rather than requiring the view to chase after view table updates, the notifications delivered as registered Continuous Queries are resolved, allowing the views to update just in time. Here’s an example of a client ...

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