Apache Camel is versatile integration library that supports a huge number of components, enterprise integration patterns, and programming languages. In this this talk I first introduce you to Apache Camel and its concepts. Then we move on to see how you can use the Groovy programming language with Camel as a first class Groovy DSL to build integration flows. You will also learn how to build a new Camel and Groovy app from scratch from a live demo. And we also touch how you can use Camel from grails using the grails-camel plugin. I will also show the web console tools that give you insight into your running Apache Camel applications, including visual route diagrams with tracing, debugging, and profiling capabilities. This session will be taught with a 50/50 mix of slides and live demos, and it will conclude with Q&A time.

1. Claus Ibsen
Red Hat
●
Integration using
Apache Camel & Groovy

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Your Speaker
● Principal Software Engineer at Red Hat
● Apache Camel
● 6 years as committer
● Author of Camel in Action book
● Contact
● EMail: claus.ibsen@gmail.com
● Twitter: @davsclaus
● Blog: http://davsclaus.com
● Linkedin: http://www.linkedin.com/in/davsclaus

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This awesome ...

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These two awesome has ...

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These three awesome has ...

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These three awesome has something in common

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Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● Creating new Camel Projects
● hawtio
● Q & A

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Why the name Camel?

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Why the name Camel?
Because Camel is
easy to remember and type ...

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Why the name Camel?
… or the creator used to smoke cigarets!
http://camel.apache.org/why-the-name-camel.html

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What is Apache Camel?
● Quote from the website

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What is Apache Camel?
● Why do we need integration?
● Critical for your business to integrate
● Why Integration Framework?
● Framework do the heavy lifting
● You can focus on business problem
● Not "reinventing the wheel"

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What is Apache Camel?
● What is Enterprise Integration Patterns?
It's a book

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What is Apache Camel?
● Enterprise Integration Patterns
http://camel.apache.org/eip

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What is Apache Camel?
● EIP - Content Based Router

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What is Apache Camel?
from newOrder

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What is Apache Camel?
from newOrder
choice

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What is Apache Camel?
from newOrder
choice
when isWidget to widget

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What is Apache Camel?
from newOrder
choice
when isWidget to widget
otherwise to gadget

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What is Apache Camel?
from(newOrder)
choice
when(isWidget) to(widget)
otherwise to(gadget)

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What is Apache Camel?
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget);

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What is Apache Camel?
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget);
Ups Sorry ...
This is a gr8conf
so lets get Groovy :)

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What is Apache Camel?
from newOrder
choice
when isWidget to widget
otherwise to gadget

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What is Apache Camel?
from newOrder
choice
when isWidget to widget
otherwise to gadget
Unfortunately the Camel
Groovy DSL is not as
awesome …
yet

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What is Apache Camel?
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget)
We removed that last semi colon ;)

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What is Apache Camel?
Endpoint newOrder = endpoint("activemq:queue:newOrder");
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget);

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What is Apache Camel?
Endpoint newOrder = endpoint("activemq:queue:newOrder");
Predicate isWidget = xpath("/order/product = 'widget'");
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget);

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What is Apache Camel?
Endpoint newOrder = endpoint("activemq:queue:newOrder");
Predicate isWidget = xpath("/order/product = 'widget'");
Endpoint widget = endpoint("activemq:queue:widget");
Endpoint gadget = endpoint("activemq:queue:gadget");
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget);

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What is Apache Camel?
● Java Code
public void configure() throws Exception {
Endpoint newOrder = endpoint("activemq:queue:newOrder");
Predicate isWidget = xpath("/order/product = 'widget'");
Endpoint widget = endpoint("activemq:queue:widget");
Endpoint gadget = endpoint("activemq:queue:gadget");
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget)
.end();
}

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What is Apache Camel?
● Java Code
import org.apache.camel.Endpoint;
import org.apache.camel.Predicate;
import org.apache.camel.builder.RouteBuilder;
public class MyRoute extends RouteBuilder {
public void configure() throws Exception {
Endpoint newOrder = endpoint("activemq:queue:newOrder");
Predicate isWidget = xpath("/order/product = 'widget'");
Endpoint widget = endpoint("activemq:queue:widget");
Endpoint gadget = endpoint("activemq:queue:gadget");
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget)
.end();
}
}

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What is Apache Camel?
● Camel Java DSL
import org.apache.camel.builder.RouteBuilder;
public class MyRoute extends RouteBuilder {
public void configure() throws Exception {
from("activemq:queue:newOrder")
.choice()
.when(xpath("/order/product = 'widget'"))
.to("activemq:queue:widget")
.otherwise()
.to("activemq:queue:gadget")
.end();
}
}

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What is Apache Camel?
● Camel XML DSL
<route>
<from uri="activemq:queue:newOrder"/>
<choice>
<when>
<xpath>/order/product = 'widget'</xpath>
<to uri="activemq:queue:widget"/>
</when>
<otherwise>
<to uri="activemq:queue:gadget"/>
</otherwise>
</choice>
</route>

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What is Apache Camel?
● Endpoint as URIs
<route>
<from uri="file:inbox/orders"/>
<choice>
<when>
<xpath>/order/product = 'widget'</xpath>
<to uri="activemq:queue:widget"/>
</when>
<otherwise>
<to uri="activemq:queue:gadget"/>
</otherwise>
</choice>
</route>
use file instead

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What is Apache Camel?
● Endpoint as URIs
<route>
<from uri="file:inbox/orders?delete=true"/>
<choice>
<when>
<xpath>/order/product = 'widget'</xpath>
<to uri="activemq:queue:widget"/>
</when>
<otherwise>
<to uri="activemq:queue:gadget"/>
</otherwise>
</choice>
</route>
parameters

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Standard Java, XML, or Groovy
● Java DSL is just Java

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Standard Java, XML, or Groovy
● XML DSL is just XML
● … with XSD schema for validation/tooling

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Standard Java, XML, or Groovy
● Groovy DSL is just Groovy
Groovy
Closure

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What is Apache Camel?
● Camel's Architecture

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What is Apache Camel?
150+ Components

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What is Apache Camel?
150+ Components

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What is Apache Camel?
● Summary
● Integration Framework
● Enterprise Integration Patterns (EIP)
● Routing (using DSL)
● Easy Configuration (endpoint as uri's)
● Just Java, XML, or Groovy code
● No Container Dependency
● A lot of components

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Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● Creating new Camel Projects
● hawtio
● Q & A

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A Little Example
● File Copier Example

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A Little Example
● File Copier Example

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A Little Example
● File Copier Example

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A Little Example
● File Copier Example

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A Little Example
● File Copier Example

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A Little Groovy Example

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A Little Groovy Example (all source)

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A Little Groovy Example
● Run the example
● groovy mycamel.groovy

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Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● Creating new Camel Projects
● hawtio
● Q & A

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Riding Camel
● Downloading Apache Camel
● zip/tarball (approx 8mb)
http://camel.apache.org

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Riding Camel
● Using Command Shell
● Requires: Apache Maven
● From Eclipse

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Riding Camel
● Console Example
● cd examples/camel-example-console
● mvn compile exec:java

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Riding Camel
● Twitter Example
● cd examples/camel-example-twitter-websocket
● mvn compile exec:java http://localhost:9090/index.html

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Riding Camel
● More examples ...
... and further details at website.
http://camel.apache.org/examples

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Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● Creating new Camel Projects
● hawtio
● Q & A

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Creating new Camel Projects
● Using Command Shell
● .. or from Eclipse

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Creating new Camel Projects
● Importing into Eclipse
Existing Maven Project

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Creating new Camel Projects
● Maven Archetypes
camel-archetype-activemq camel-archetype-java
camel-archetype-blueprint camel-archetype-scala
camel-archetype-component camel-archetype-spring
camel-archetype-dataformat camel-archetype-spring-dm
camel-archetype-groovy camel-archetype-web

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Creating new Camel Projects
● camel-archetype-groovy
mvn install
mvn exec:java

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Creating new Camel Projects
● camel-archetype-spring
mvn install
mvn camel:run
mvn io.hawt:hawtio-maven-plugin:1.4.2:spring

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Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● Creating new Camel Projects
● hawtio
● Q & A

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hawtio
● What does it do? ...

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hawtio
● Yet another awesome project created by this guy ...

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hawtio
Tooling – Web Console - hawtio
http://hawt.io

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hawtio
● What does it do
for Apache Camel?

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hawtio
● Technology Stack
● HTML5 single page app
● TypeScript → JavaScript
● Angular JS
● Bootstrap CSS
● HTTP/REST ↔ backend
● Jolokia on backend for JMX over REST
● Plugins expose services as JMX or REST
http://hawt.io/plugins/howPluginsWork.html

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Apache Camel & hawtio

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Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● Creating new Camel Projects
● hawtio
● Q & A

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These three awesome has something in common

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These three awesome has something in common

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What about a 4th
awesome project?

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Any Questions ?
● Contact
● EMail: cibsen@redhat.com / claus.ibsen@gmail.com
● Twitter: @davsclaus
● Blog: http://davsclaus.com
● Linkedin: http://www.linkedin.com/in/davsclaus