Introduction
Apache Camel is an open-source integration framework that provides a unified and efficient approach for integrating various systems and applications. One of the core features of Apache Camel is its routing and mediation engine, which is used to define and manage the flow of data between different components. In this article, we will explore the basics of Apache Camel’s routing and mediation capabilities.
What are routings and mediations in Apache Camel?
Routing and mediation are the core features of Apache Camel that allow you to define the flow of data between different components in a system. The routing engine determines the next step in the flow of data based on the rules defined in the Camel routes.
The mediation engine, on the other hand, allows you to manipulate the data before it is sent to the next component. The combination of these two features provides a powerful and flexible way to integrate different systems and applications.
How does routing work in Apache Camel?
Apache Camel uses a routing engine to determine the next step in the flow of data based on the rules defined in the Camel routes. A Camel route is defined using the Domain Specific Language (DSL) provided by Apache Camel. The DSL provides a simple and intuitive way to define the flow of data between different components.
This route defines a flow of data from a JMS queue named „input“ to a file named „output“. The routing engine will take care of delivering the data from the JMS queue to the file.
How does mediation work?
Apache Camel’s mediation engine allows you to manipulate the data before it is sent to the next component. The mediation engine provides a number of built-in transformations, such as converting data from one format to another, filtering data based on certain conditions, and aggregating data.
In this example, the „marshal().xmljson()“ part of the route specifies that the data should be converted from XML to JSON. The mediation engine will take care of this conversion before the data is sent to the file.
Conclusion
Apache Camel’s routing and mediation engine provides a powerful and flexible way to integrate different systems and applications. The combination of the routing and mediation features allows you to define the flow of data between different components and manipulate the data before it is sent to the next component. Whether you’re looking to integrate applications within your organization or between different organizations, Apache Camel provides a robust and scalable solution for all your integration needs.
