Integration using Apache Camel and Groovy

Claus Ibsen

Red Hat

Integration using
Apache Camel & Groovy

Your Speaker

Principal Software Engineer at Red Hat

Apache Camel6 years as committer

Author of Camel in Action book

ContactEMail: [email protected]

Twitter: @davsclaus

Blog: http://davsclaus.com

Linkedin: http://www.linkedin.com/in/davsclaus

This awesome ...

These two awesome has ...

These three awesome has ...

These three awesome has something in common

Agenda

What is Apache Camel?

A little Example

Riding Camel

Creating new Camel Projects

hawtio

Q & A

Why the name Camel?

Why the name Camel?

Because Camel is
easy to remember and type ...

Why the name Camel?

or the creator used to smoke cigarets!

http://camel.apache.org/why-the-name-camel.html


Quote from the website


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"


What is Enterprise Integration Patterns?

It's a book


Enterprise Integration Patterns

http://camel.apache.org/eip


EIP - Content Based Router


from newOrder


from newOrder choice


from newOrder choice when isWidget to widget


from newOrder choice when isWidget to widget otherwise to gadget


from(newOrder) choice when(isWidget) to(widget) otherwise to(gadget)


from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget);



Ups Sorry ...This is a gr8confso lets get Groovy :)





Unfortunately the Camel Groovy DSL is not as awesome yet


from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget)

We removed that last semi colon ;)


Endpoint newOrder = endpoint("activemq:queue:newOrder");



Endpoint newOrder = endpoint("activemq:queue:newOrder");Predicate isWidget = xpath("/order/product = 'widget'");



Endpoint newOrder = endpoint("activemq:queue:newOrder");Predicate isWidget = xpath("/order/product = 'widget'");Endpoint widget = endpoint("activemq:queue:widget");Endpoint gadget = endpoint("activemq:queue:gadget");



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(); }


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(); }}


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(); }}


Camel XML DSL

/order/product = 'widget'


Endpoint as URIs


use file instead


Endpoint as URIs


parameters

Standard Java, XML, or Groovy

Java DSL is just Java


XML DSL is just XML

with XSD schema for validation/tooling


Groovy DSL is just Groovy

GroovyClosure


Camel's Architecture


150+ Components


150+ Components


SummaryIntegration 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

Agenda


A little Example

Riding Camel


hawtio

Q & A

A Little Example

File Copier Example

A Little Example

File Copier Example

A Little Example

File Copier Example

A Little Example

File Copier Example

A Little Example

File Copier Example

A Little Groovy Example

A Little Groovy Example (all source)

A Little Groovy Example

Run the examplegroovy mycamel.groovy

Agenda


A little Example

Riding Camel


hawtio

Q & A

Riding Camel

Downloading Apache Camelzip/tarball (approx 8mb)

http://camel.apache.org

Riding Camel

Using Command ShellRequires: Apache Maven

From Eclipse

Riding Camel

Console Example

cd examples/camel-example-console

mvn compile exec:java

Riding Camel

Twitter Example

cd examples/camel-example-twitter-websocket

mvn compile exec:java

http://localhost:9090/index.html

Riding Camel

More examples ...

... and further details at website.

http://camel.apache.org/examples

Agenda


A little Example

Riding Camel


hawtio

Q & A


Using Command Shell

.. or from Eclipse


Importing into Eclipse

Existing Maven Project


Maven Archetypes

camel-archetype-activemqcamel-archetype-java

camel-archetype-blueprintcamel-archetype-scala

camel-archetype-componentcamel-archetype-spring

camel-archetype-dataformatcamel-archetype-spring-dm

camel-archetype-groovycamel-archetype-web


camel-archetype-groovy

mvn installmvn exec:java


camel-archetype-spring

mvn installmvn camel:runmvn io.hawt:hawtio-maven-plugin:1.4.2:spring

Agenda


A little Example

Riding Camel


hawtio

Q & A

hawtio

What does it do? ...

hawtio

Yet another awesome project created by this guy ...

hawtio

Tooling Web Console - hawtio

http://hawt.io

hawtio

What does it do
for Apache Camel?

hawtio

Technology StackHTML5 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

Apache Camel & hawtio

Agenda


A little Example

Riding Camel


hawtio

Q & A



What about a 4th awesome project?

Any Questions ?

ContactEMail: [email protected] / [email protected]

Twitter: @davsclaus

Blog: http://davsclaus.com

Linkedin: http://www.linkedin.com/in/davsclaus

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