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Spring Boot Example with Camel REST DSL and Platform HTTP

Introduction

This example illustrates how to use Spring Boot with Camel. It provides a simple REST service that is created with Camel REST DSL and platform-http.

The project uses the camel-spring-boot-starter dependency, a Spring Boot starter dependency for Camel that simplifies the Maven configuration.

The project also uses camel-servlet-starter component as the implementation for platform-http-engine.

Build

You can build this example using:

$ mvn package

Run

You can run this example using:

$ mvn spring-boot:run

You should see the following output when the application is launched:

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 ...
2022-09-05 12:00:31.101  INFO 16692 --- [           main] o.a.c.c.s.CamelHttpTransportServlet      : Initialized CamelHttpTransportServlet[name=CamelServlet, contextPath=]
2022-09-05 12:00:31.113  INFO 16692 --- [           main] io.undertow                              : starting server: Undertow - 2.2.19.Final
2022-09-05 12:00:31.128  INFO 16692 --- [           main] org.xnio                                 : XNIO version 3.8.7.Final
2022-09-05 12:00:31.144  INFO 16692 --- [           main] org.xnio.nio                             : XNIO NIO Implementation Version 3.8.7.Final
2022-09-05 12:00:31.354  INFO 16692 --- [           main] org.jboss.threads                        : JBoss Threads version 3.1.0.Final
2022-09-05 12:00:31.453  INFO 16692 --- [           main] o.s.b.w.e.undertow.UndertowWebServer     : Undertow started on port(s) 8080 (http)
2022-09-05 12:00:31.955  INFO 16692 --- [           main] o.a.c.impl.engine.AbstractCamelContext   : Apache Camel 4.0.0-SNAPSHOT (MyCamel) is starting
2022-09-05 12:00:31.989  INFO 16692 --- [           main] o.a.c.impl.engine.AbstractCamelContext   : Routes startup (started:7)
2022-09-05 12:00:31.989  INFO 16692 --- [           main] o.a.c.impl.engine.AbstractCamelContext   :     Started route1 (direct://test)
2022-09-05 12:00:31.989  INFO 16692 --- [           main] o.a.c.impl.engine.AbstractCamelContext   :     Started route2 (rest://get:/todos)
2022-09-05 12:00:31.989  INFO 16692 --- [           main] o.a.c.impl.engine.AbstractCamelContext   :     Started route3 (rest://get:/todos:/%7Bid%7D)
2022-09-05 12:00:31.990  INFO 16692 --- [           main] o.a.c.impl.engine.AbstractCamelContext   :     Started route4 (rest://patch:/todos:/%7Bid%7D)
2022-09-05 12:00:31.990  INFO 16692 --- [           main] o.a.c.impl.engine.AbstractCamelContext   :     Started route5 (rest://post:/todos)
2022-09-05 12:00:31.990  INFO 16692 --- [           main] o.a.c.impl.engine.AbstractCamelContext   :     Started route6 (rest://delete:/todos)
2022-09-05 12:00:31.991  INFO 16692 --- [           main] o.a.c.impl.engine.AbstractCamelContext   :     Started route7 (rest://delete:/todos:/%7Bid%7D)
2022-09-05 12:00:31.992  INFO 16692 --- [           main] o.a.c.impl.engine.AbstractCamelContext   : Apache Camel 4.0.0-SNAPSHOT (MyCamel) started in 552ms (build:95ms init:421ms start:36ms)
2022-09-05 12:00:32.005  INFO 16692 --- [           main] o.a.c.example.springboot.Application     : Started Application in 13.737 seconds (JVM running for 14.657)

After the Spring Boot application is started, you can execute the following HTTP requests:

Create a TODO

$ curl -d '{"title":"Todo title", "completed":"false", "order": 1, "url":""}' -H "Content-Type: application/json" -X POST http://localhost:8080/todos

The command will produce the following output:

{"id":1,"title":"Todo title","completed":false,"order":1,"url":""}

Retrieve all TODOs

$ curl http://localhost:8080/todos

The command will produce the following output:

[{"id":1,"title":"Todo title","completed":false,"order":1,"url":""}]

Update one TODO

$ curl -d '{"title":"Todo title", "completed":"true", "order": 1, "url":""}' -H "Content-Type: application/json" -X PATCH http://localhost:8080/todos/1

The command will produce the following output:

{"id":1,"title":"Todo title","completed":true,"order":1,"url":""}

Delete completed TODOs

$ curl -X "DELETE" http://localhost:8080/todos

The command will produce the following output:

1

The Spring Boot application can be stopped pressing [CTRL] + [C] in the shell.

Help and contributions

If you hit any problem using Camel or have some feedback, then please let us know.

We also love contributors, so get involved :-)

The Camel riders!