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Design event-driven integrations with Kamelets and Camel K

Design event-driven integrations with Kamelets and Camel K

The Kamelet is a concept introduced near the end of 2020 by Camel K to simplify the design of complex system integrations. If you’re familiar with the Camel ecosystem, you know that Camel offers many components for integrating existing systems. An integration’s granularity is related to its low-level components, however. With Kamelets you can reason at a higher level of abstraction than with Camel alone.

A Kamelet is a document specifying an integration flow. A Kamelet uses Camel components and enterprise integration patterns (EIPs) to describe a system’s behavior. You can reuse a Kamelet abstraction in any integration on top of a Kubernetes cluster. You can use any of Camel’s domain-specific languages (DSLs) to write a Kamelet, but the most natural choice is the YAML DSL. The YAML DSL is designed to specify input and output formats, so any integration developer knows beforehand what kind of data to expect.

A Kamelet also serves as a source or sink of events, making Kamelets the building blocks of an event-driven architecture. Later in the article, I will introduce the concept of source and sink events and how to use them in an event-driven architecture with Kamelets.

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