CQRS Pattern

  • Commands change the state of the object or entity, also called modifiers or mutators.
  • Queries return the state of the entity and do not change anything. Another term for them is “accessors.”

Why Is It Required?

  • Introduces the risk of data contention.
  • Managing permissions and security become complex as the same objects are exposed to both read and write operations.

How CQRS Solves This Problem

Benefits of CQRS

  • Separate command and query models, resulting in simplified design and implementation of the system and overall reduction of complexity.
  • One can easily optimize the read side of the system separately from the write side, allowing scaling of each differently as per the load on the side. For example, read datastores often encounter greater load, and hence can be scaled without affecting the write datastores.
  • You can provide multiple views of your data for querying purposes depending on the use cases.

How CQRS Works

How to Implement Event Sourcing and CQRS

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Kajal Rawal

Kajal Rawal

Programming isn’t about what you know; it’s about what you can figure out.

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