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README.md

Widget and Gadget Example - CDI

Introduction

This example shows the Widget and Gadget use-case from the Enterprise Integration Patterns book.

The example provides a simple order system, where incoming orders, is routed to either a widget or gadget inventory system, for further processing. The example uses the most famous pattern from the EIP book, which is the Content Based Router.

The example is implemented in Java with CDI dependency injection. The example uses JBoss Weld as the minimal CDI container to run the application, but you can run the application in any CDI compliant container.

Camel component used in this example

  • camel-core
  • camel-jms
  • activemq-camel

Build

You will need to build this example first:

mvn install

Run

This example requires an existing Apache ActiveMQ broker running.

To setup and run Apache ActiveMQ then download it from the ActiveMQ website.

Then extract the download such as (the .tar)

tar xf ~/Downloads/apache-activemq-5.13.0-bin.tar.gz

Then the broker can be started with

cd apache-activemq-5.13.0
bin/activemq console

And then Broker is running (you can press ctrl+c in the shell to stop the broker).

The Camel application connects to the remote broker on url: tcp://localhost:61616. The url can be changed in the WidgetMain.java source code.

When the ActiveMQ broker is running, then you can run this example using:

mvn compile camel:run

When the Camel application runs, you should see 2 orders being processed and logged to the console, such as:

2016-01-11 12:53:53,978 [sumer[newOrder]] INFO  widget                         - Exchange[ExchangePattern: InOnly, BodyType: byte[], Body: <order>  <customerId>123</customerId>  <product>widget</product>  <amount>2</amount></order>]
2016-01-11 12:53:54,005 [sumer[newOrder]] INFO  gadget                         - Exchange[ExchangePattern: InOnly, BodyType: byte[], Body: <order>  <customerId>456</customerId>  <product>gadget</product>  <amount>3</amount></order>]

You can access the ActiveMQ web console using http://localhost:8161/admin/ and then browse the queues. You should see the three queues:

  • newOrder
  • widget
  • gadget

The Camel application can be stopped pressing ctrl+c in the shell.

Configuration

The Camel application is configured in the org.apache.camel.example.widget.WidgetApplication.java file.

Forum, Help, etc

If you hit an problems please let us know on the Camel Forums http://camel.apache.org/discussion-forums.html

Please help us make Apache Camel better - we appreciate any feedback you may have. Enjoy!

The Camel riders!