Console Example
This is a beginner’s example that demonstrates how to get started with Apache Camel.
In this example we integrate with the console using the Stream component. The example is interactive - it reads input from the console, and then transforms the input to upper case and prints it back to the console.
This is implemented with a Camel route defined in the Spring XML markup shown below:
<!-- camelContext is the Camel runtime, where we can host Camel routes -->
<camelContext xmlns="http://camel.apache.org/schema/spring">
<route>
<!-- read input from the console using the stream component -->
<from uri="stream:in?promptMessage=Enter something: "/>
<!-- transform the input to upper case using the simple language -->
<!-- you can also use other languages such as groovy, ognl, mvel, javascript etc. -->
<transform>
<simple>${body.toUpperCase()}</simple>
</transform>
<!-- and then print to the console -->
<to uri="stream:out"/>
</route>
</camelContext>
This example can be launched from the command line using Maven:
mvn compile exec:java
In the console you can enter a message and press <ENTER>. Camel responds by echoing the input message in upper case, as shown below:
[onsole.CamelConsoleMain.main()] SpringCamelContext INFO Apache Camel 2.10 (CamelContext: camel-1) started in 0.455 seconds Enter something: camel rocks CAMEL ROCKS Enter something: and we have fun AND WE HAVE FUN Enter something:
To stop the example, strike Control+C
You can also run this example from your editor. For example, from
Eclipse you can import this project using: File → Import … → Existing
Maven Project, and select pom.xml
from the
examples\camel-example-console
directory.
Next, navigate to the
org.apache.camel.example.console.CamelConsoleMain
class, right-click,
and select Run As → Java Application.