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The Spark-rest component allows to define REST endpoints using the Spark REST Java library which has a nice DSL (not to be mistaken with Apache Spark) using the Rest DSL.

Maven users will need to add the following dependency to their pom.xml for this component:

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  spark-rest://verb:path?[options]

URI Options

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Path using Spark syntax

The path option is defined using a Spark REST syntax where you define the REST context path using support for parameters and splat. See more details at the Spark Java Route documentation.

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  from("spark-rest:get:/hello/*/to/*")
    .transform().simple("Bye big ${header.splat[1]} from ${header.splat[0]}");

SparkRouteBuilder

If you use Java code, then you can use the class org.apache.camel.component.sparkrest.SparkRouteBuilder to define routes using a Spark DSL, as shown below

Rest DSL

Apache Camel provides a new Rest DSL that allow to define the REST services in a nice REST style. For example we can define a REST hello service as shown below:

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  return new 

RouteBuilder() {
      @Override
      public void configure() throws Exception {
            

rest("/hello/

{me}").get()
                .route().transform().simple("Bye ${header.me}");
        }
    };

  <camelContext xmlns="http://camel.apache.org/schema/spring">
    <rest uri="/hello/{me}">
      <get>
        <route>
          <transform>
            <simple>Bye ${header.me}</simple>
          </transform>
        </route>
      </get>
    </rest>
  </camelContext>

See more details at the Rest DSLWhen using the SparkRouteBuilder, then you can define Camel routes using the REST verbs, such as get, post, put, delete etc.

More examples

There is a camel-example-spark-rest-tomcat example in the Apache Camel distribution, that demonstrates how to use camel-spark-rest in a web application that can be deployed on Apache Tomcat, or similar web containers.

• Rest